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* selftests: add tests for clone3() with *set_tidAdrian Reber2019-11-156-26/+421
| | | | | | | | | | | | | | This tests clone3() with *set_tid to see if all desired PIDs are working as expected. The tests are trying multiple invalid input parameters as well as creating processes while specifying a certain PID in multiple PID namespaces at the same time. Additionally this moves common clone3() test code into clone3_selftests.h. Signed-off-by: Adrian Reber <areber@redhat.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191115123621.142252-2-areber@redhat.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* fork: extend clone3() to support setting a PIDAdrian Reber2019-11-157-37/+122
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main motivation to add set_tid to clone3() is CRIU. To restore a process with the same PID/TID CRIU currently uses /proc/sys/kernel/ns_last_pid. It writes the desired (PID - 1) to ns_last_pid and then (quickly) does a clone(). This works most of the time, but it is racy. It is also slow as it requires multiple syscalls. Extending clone3() to support *set_tid makes it possible restore a process using CRIU without accessing /proc/sys/kernel/ns_last_pid and race free (as long as the desired PID/TID is available). This clone3() extension places the same restrictions (CAP_SYS_ADMIN) on clone3() with *set_tid as they are currently in place for ns_last_pid. The original version of this change was using a single value for set_tid. At the 2019 LPC, after presenting set_tid, it was, however, decided to change set_tid to an array to enable setting the PID of a process in multiple PID namespaces at the same time. If a process is created in a PID namespace it is possible to influence the PID inside and outside of the PID namespace. Details also in the corresponding selftest. To create a process with the following PIDs: PID NS level Requested PID 0 (host) 31496 1 42 2 1 For that example the two newly introduced parameters to struct clone_args (set_tid and set_tid_size) would need to be: set_tid[0] = 1; set_tid[1] = 42; set_tid[2] = 31496; set_tid_size = 3; If only the PIDs of the two innermost nested PID namespaces should be defined it would look like this: set_tid[0] = 1; set_tid[1] = 42; set_tid_size = 2; The PID of the newly created process would then be the next available free PID in the PID namespace level 0 (host) and 42 in the PID namespace at level 1 and the PID of the process in the innermost PID namespace would be 1. The set_tid array is used to specify the PID of a process starting from the innermost nested PID namespaces up to set_tid_size PID namespaces. set_tid_size cannot be larger then the current PID namespace level. Signed-off-by: Adrian Reber <areber@redhat.com> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com> Acked-by: Andrei Vagin <avagin@gmail.com> Link: https://lore.kernel.org/r/20191115123621.142252-1-areber@redhat.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* selftests: add tests for clone3()Adrian Reber2019-11-123-2/+208
| | | | | | | | | | | | | | | | | | | This adds tests for clone3() with different values and sizes of struct clone_args. This selftest was initially part of of the clone3() with PID selftest. After that patch was almost merged Eugene sent out a couple of patches to fix problems with these test. This commit now only contains the clone3() selftest after the LPC decision to rework clone3() with PID to allow setting the PID in multiple PID namespaces including all of Eugene's patches. Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com> Signed-off-by: Adrian Reber <areber@redhat.com> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191112095851.811884-1-areber@redhat.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* tests: test CLONE_CLEAR_SIGHANDChristian Brauner2019-10-215-0/+181
| | | | | | | | | | | | Test that CLONE_CLEAR_SIGHAND resets signal handlers to SIG_DFL for the child process and that CLONE_CLEAR_SIGHAND and CLONE_SIGHAND are mutually exclusive. Cc: Florian Weimer <fweimer@redhat.com> Cc: libc-alpha@sourceware.org Cc: linux-api@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191014104538.3096-2-christian.brauner@ubuntu.com
* clone3: add CLONE_CLEAR_SIGHANDChristian Brauner2019-10-212-5/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reset all signal handlers of the child not set to SIG_IGN to SIG_DFL. Mutually exclusive with CLONE_SIGHAND to not disturb other thread's signal handler. In the spirit of closer cooperation between glibc developers and kernel developers (cf. [2]) this patchset came out of a discussion on the glibc mailing list for improving posix_spawn() (cf. [1], [3], [4]). Kernel support for this feature has been explicitly requested by glibc and I see no reason not to help them with this. The child helper process on Linux posix_spawn must ensure that no signal handlers are enabled, so the signal disposition must be either SIG_DFL or SIG_IGN. However, it requires a sigprocmask to obtain the current signal mask and at least _NSIG sigaction calls to reset the signal handlers for each posix_spawn call or complex state tracking that might lead to data corruption in glibc. Adding this flags lets glibc avoid these problems. [1]: https://www.sourceware.org/ml/libc-alpha/2019-10/msg00149.html [3]: https://www.sourceware.org/ml/libc-alpha/2019-10/msg00158.html [4]: https://www.sourceware.org/ml/libc-alpha/2019-10/msg00160.html [2]: https://lwn.net/Articles/799331/ '[...] by asking for better cooperation with the C-library projects in general. They should be copied on patches containing ABI changes, for example. I noted that there are often times where C-library developers wish the kernel community had done things differently; how could those be avoided in the future? Members of the audience suggested that more glibc developers should perhaps join the linux-api list. The other suggestion was to "copy Florian on everything".' Cc: Florian Weimer <fweimer@redhat.com> Cc: libc-alpha@sourceware.org Cc: linux-api@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20191014104538.3096-1-christian.brauner@ubuntu.com
* pid: use pid_has_task() in pidfd_open()Christian Brauner2019-10-171-7/+5
| | | | | | | | | | Use the new pid_has_task() helper in pidfd_open(). This simplifies the code and avoids taking rcu_read_{lock,unlock}() and leads to overall nicer code. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20191017101832.5985-5-christian.brauner@ubuntu.com
* exit: use pid_has_task() in do_wait()Christian Brauner2019-10-171-1/+1
| | | | | | | | | Replace hlist_empty() with the new pid_has_task() helper which is more idiomatic, easier to grep for, and unifies how callers perform this check. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20191017101832.5985-4-christian.brauner@ubuntu.com
* pid: use pid_has_task() in __change_pid()Christian Brauner2019-10-171-1/+1
| | | | | | | | | | Replace hlist_empty() with the new pid_has_task() helper which is more idiomatic, easier to grep for, and unifies how callers perform this check. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20191017101832.5985-3-christian.brauner@ubuntu.com
* test: verify fdinfo for pidfd of reaped processChristian Brauner2019-10-171-14/+45
| | | | | | | | | | | Test that the fdinfo field of a pidfd referring to a dead process correctly shows Pid: -1 and NSpid: -1. Cc: Christian Kellner <christian@kellner.me> Cc: linux-kselftest@vger.kernel.org Reviewed-by: Christian Kellner <christian@kellner.me> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191017101832.5985-2-christian.brauner@ubuntu.com
* pidfd: check pid has attached task in fdinfoChristian Brauner2019-10-172-6/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, when a task is dead we still print the pid it used to use in the fdinfo files of its pidfds. This doesn't make much sense since the pid may have already been reused. So verify that the task is still alive by introducing the pid_has_task() helper which will be used by other callers in follow-up patches. If the task is not alive anymore, we will print -1. This allows us to differentiate between a task not being present in a given pid namespace - in which case we already print 0 - and a task having been reaped. Note that this uses PIDTYPE_PID for the check. Technically, we could've checked PIDTYPE_TGID since pidfds currently only refer to thread-group leaders but if they won't anymore in the future then this check becomes problematic without it being immediately obvious to non-experts imho. If a thread is created via clone(CLONE_THREAD) than struct pid has a single non-empty list pid->tasks[PIDTYPE_PID] and this pid can't be used as a PIDTYPE_TGID meaning pid->tasks[PIDTYPE_TGID] will return NULL even though the thread-group leader might still be very much alive. So checking PIDTYPE_PID is fine and is easier to maintain should we ever allow pidfds to refer to threads. Cc: Jann Horn <jannh@google.com> Cc: Christian Kellner <christian@kellner.me> Cc: linux-api@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20191017101832.5985-1-christian.brauner@ubuntu.com
* pidfd: add tests for NSpid info in fdinfoChristian Kellner2019-10-152-1/+266
| | | | | | | | | | | | | | Add a test that checks that if pid namespaces are configured the fdinfo file of a pidfd contains an NSpid: entry containing the process id in the current and additionally all nested namespaces. In the case that a pidfd is from a pid namespace not in the same namespace hierarchy as the process accessing the fdinfo file, ensure the 'NSpid' shows 0 for that pidfd, analogous to the 'Pid' entry. Signed-off-by: Christian Kellner <christian@kellner.me> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191014162034.2185-2-ckellner@redhat.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* pidfd: add NSpid entries to fdinfoChristian Kellner2019-10-151-1/+52
| | | | | | | | | | | | | | | | | | Currently, the fdinfo file contains the Pid field which shows the pid a given pidfd refers to in the pid namespace of the procfs instance. If pid namespaces are configured, also show an NSpid field for easy retrieval of the pid in all descendant pid namespaces. If the pid namespace of the process is not a descendant of the pid namespace of the procfs instance 0 will be shown as its first NSpid entry and no other entries will be shown. Add a block comment to pidfd_show_fdinfo with a detailed explanation of Pid and NSpid fields. Co-developed-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Christian Kellner <christian@kellner.me> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20191014162034.2185-1-ckellner@redhat.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* Linux 5.4-rc3v5.4-rc3Linus Torvalds2019-10-131-1/+1
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* Merge tag 'trace-v5.4-rc2' of ↵Linus Torvalds2019-10-1315-132/+223
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: "A few tracing fixes: - Remove lockdown from tracefs itself and moved it to the trace directory. Have the open functions there do the lockdown checks. - Fix a few races with opening an instance file and the instance being deleted (Discovered during the lockdown updates). Kept separate from the clean up code such that they can be backported to stable easier. - Clean up and consolidated the checks done when opening a trace file, as there were multiple checks that need to be done, and it did not make sense having them done in each open instance. - Fix a regression in the record mcount code. - Small hw_lat detector tracer fixes. - A trace_pipe read fix due to not initializing trace_seq" * tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Initialize iter->seq after zeroing in tracing_read_pipe() tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency tracing/hwlat: Report total time spent in all NMIs during the sample recordmcount: Fix nop_mcount() function tracing: Do not create tracefs files if tracefs lockdown is in effect tracing: Add locked_down checks to the open calls of files created for tracefs tracing: Add tracing_check_open_get_tr() tracing: Have trace events system open call tracing_open_generic_tr() tracing: Get trace_array reference for available_tracers files ftrace: Get a reference counter for the trace_array on filter files tracefs: Revert ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is locked down")
| * tracing: Initialize iter->seq after zeroing in tracing_read_pipe()Petr Mladek2019-10-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A customer reported the following softlockup: [899688.160002] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [test.sh:16464] [899688.160002] CPU: 0 PID: 16464 Comm: test.sh Not tainted 4.12.14-6.23-azure #1 SLE12-SP4 [899688.160002] RIP: 0010:up_write+0x1a/0x30 [899688.160002] Kernel panic - not syncing: softlockup: hung tasks [899688.160002] RIP: 0010:up_write+0x1a/0x30 [899688.160002] RSP: 0018:ffffa86784d4fde8 EFLAGS: 00000257 ORIG_RAX: ffffffffffffff12 [899688.160002] RAX: ffffffff970fea00 RBX: 0000000000000001 RCX: 0000000000000000 [899688.160002] RDX: ffffffff00000001 RSI: 0000000000000080 RDI: ffffffff970fea00 [899688.160002] RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000 [899688.160002] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b59014720d8 [899688.160002] R13: ffff8b59014720c0 R14: ffff8b5901471090 R15: ffff8b5901470000 [899688.160002] tracing_read_pipe+0x336/0x3c0 [899688.160002] __vfs_read+0x26/0x140 [899688.160002] vfs_read+0x87/0x130 [899688.160002] SyS_read+0x42/0x90 [899688.160002] do_syscall_64+0x74/0x160 It caught the process in the middle of trace_access_unlock(). There is no loop. So, it must be looping in the caller tracing_read_pipe() via the "waitagain" label. Crashdump analyze uncovered that iter->seq was completely zeroed at this point, including iter->seq.seq.size. It means that print_trace_line() was never able to print anything and there was no forward progress. The culprit seems to be in the code: /* reset all but tr, trace, and overruns */ memset(&iter->seq, 0, sizeof(struct trace_iterator) - offsetof(struct trace_iterator, seq)); It was added by the commit 53d0aa773053ab182877 ("ftrace: add logic to record overruns"). It was v2.6.27-rc1. It was the time when iter->seq looked like: struct trace_seq { unsigned char buffer[PAGE_SIZE]; unsigned int len; }; There was no "size" variable and zeroing was perfectly fine. The solution is to reinitialize the structure after or without zeroing. Link: http://lkml.kernel.org/r/20191011142134.11997-1-pmladek@suse.com Signed-off-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing/hwlat: Don't ignore outer-loop duration when calculating max_latencySrivatsa S. Bhat (VMware)2019-10-121-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | max_latency is intended to record the maximum ever observed hardware latency, which may occur in either part of the loop (inner/outer). So we need to also consider the outer-loop sample when updating max_latency. Link: http://lkml.kernel.org/r/157073345463.17189.18124025522664682811.stgit@srivatsa-ubuntu Fixes: e7c15cd8a113 ("tracing: Added hardware latency tracer") Cc: stable@vger.kernel.org Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing/hwlat: Report total time spent in all NMIs during the sampleSrivatsa S. Bhat (VMware)2019-10-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nmi_total_ts is supposed to record the total time spent in *all* NMIs that occur on the given CPU during the (active portion of the) sampling window. However, the code seems to be overwriting this variable for each NMI, thereby only recording the time spent in the most recent NMI. Fix it by accumulating the duration instead. Link: http://lkml.kernel.org/r/157073343544.17189.13911783866738671133.stgit@srivatsa-ubuntu Fixes: 7b2c86250122 ("tracing: Add NMI tracing in hwlat detector") Cc: stable@vger.kernel.org Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * recordmcount: Fix nop_mcount() functionSteven Rostedt (VMware)2019-10-121-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The removal of the longjmp code in recordmcount.c mistakenly made the return of make_nop() being negative an exit of nop_mcount(). It should not exit the routine, but instead just not process that part of the code. By exiting with an error code, it would cause the update of recordmcount to fail some files which would fail the build if ftrace function tracing was enabled. Link: http://lkml.kernel.org/r/20191009110538.5909fec6@gandalf.local.home Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: 3f1df12019f3 ("recordmcount: Rewrite error/success handling") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing: Do not create tracefs files if tracefs lockdown is in effectSteven Rostedt (VMware)2019-10-121-0/+4
| | | | | | | | | | | | | | | | | | | | | | If on boot up, lockdown is activated for tracefs, don't even bother creating the files. This can also prevent instances from being created if lockdown is in effect. Link: http://lkml.kernel.org/r/CAHk-=whC6Ji=fWnjh2+eS4b15TnbsS4VPVtvBOwCy1jjEG_JHQ@mail.gmail.com Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing: Add locked_down checks to the open calls of files created for tracefsSteven Rostedt (VMware)2019-10-1210-4/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added various checks on open tracefs calls to see if tracefs is in lockdown mode, and if so, to return -EPERM. Note, the event format files (which are basically standard on all machines) as well as the enabled_functions file (which shows what is currently being traced) are not lockde down. Perhaps they should be, but it seems counter intuitive to lockdown information to help you know if the system has been modified. Link: http://lkml.kernel.org/r/CAHk-=wj7fGPKUspr579Cii-w_y60PtRaiDgKuxVtBAMK0VNNkA@mail.gmail.com Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing: Add tracing_check_open_get_tr()Steven Rostedt (VMware)2019-10-126-60/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, most files in the tracefs directory test if tracing_disabled is set. If so, it should return -ENODEV. The tracing_disabled is called when tracing is found to be broken. Originally it was done in case the ring buffer was found to be corrupted, and we wanted to prevent reading it from crashing the kernel. But it's also called if a tracing selftest fails on boot. It's a one way switch. That is, once it is triggered, tracing is disabled until reboot. As most tracefs files can also be used by instances in the tracefs directory, they need to be carefully done. Each instance has a trace_array associated to it, and when the instance is removed, the trace_array is freed. But if an instance is opened with a reference to the trace_array, then it requires looking up the trace_array to get its ref counter (as there could be a race with it being deleted and the open itself). Once it is found, a reference is added to prevent the instance from being removed (and the trace_array associated with it freed). Combine the two checks (tracing_disabled and trace_array_get()) into a single helper function. This will also make it easier to add lockdown to tracefs later. Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing: Have trace events system open call tracing_open_generic_tr()Steven Rostedt (VMware)2019-10-123-15/+5
| | | | | | | | | | | | | | | | | | | | Instead of having the trace events system open call open code the taking of the trace_array descriptor (with trace_array_get()) and then calling trace_open_generic(), have it use the tracing_open_generic_tr() that does the combination of the two. This requires making tracing_open_generic_tr() global. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracing: Get trace_array reference for available_tracers filesSteven Rostedt (VMware)2019-10-121-2/+15
| | | | | | | | | | | | | | | | | | | | | | | | As instances may have different tracers available, we need to look at the trace_array descriptor that shows the list of the available tracers for the instance. But there's a race between opening the file and an admin deleting the instance. The trace_array_get() needs to be called before accessing the trace_array. Cc: stable@vger.kernel.org Fixes: 607e2ea167e56 ("tracing: Set up infrastructure to allow tracers for instances") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * ftrace: Get a reference counter for the trace_array on filter filesSteven Rostedt (VMware)2019-10-121-9/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | The ftrace set_ftrace_filter and set_ftrace_notrace files are specific for an instance now. They need to take a reference to the instance otherwise there could be a race between accessing the files and deleting the instance. It wasn't until the :mod: caching where these file operations started referencing the trace_array directly. Cc: stable@vger.kernel.org Fixes: 673feb9d76ab3 ("ftrace: Add :mod: caching infrastructure to trace_array") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| * tracefs: Revert ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is ↵Steven Rostedt (VMware)2019-10-121-41/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | locked down") Running the latest kernel through my "make instances" stress tests, I triggered the following bug (with KASAN and kmemleak enabled): mkdir invoked oom-killer: gfp_mask=0x40cd0(GFP_KERNEL|__GFP_COMP|__GFP_RECLAIMABLE), order=0, oom_score_adj=0 CPU: 1 PID: 2229 Comm: mkdir Not tainted 5.4.0-rc2-test #325 Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014 Call Trace: dump_stack+0x64/0x8c dump_header+0x43/0x3b7 ? trace_hardirqs_on+0x48/0x4a oom_kill_process+0x68/0x2d5 out_of_memory+0x2aa/0x2d0 __alloc_pages_nodemask+0x96d/0xb67 __alloc_pages_node+0x19/0x1e alloc_slab_page+0x17/0x45 new_slab+0xd0/0x234 ___slab_alloc.constprop.86+0x18f/0x336 ? alloc_inode+0x2c/0x74 ? irq_trace+0x12/0x1e ? tracer_hardirqs_off+0x1d/0xd7 ? __slab_alloc.constprop.85+0x21/0x53 __slab_alloc.constprop.85+0x31/0x53 ? __slab_alloc.constprop.85+0x31/0x53 ? alloc_inode+0x2c/0x74 kmem_cache_alloc+0x50/0x179 ? alloc_inode+0x2c/0x74 alloc_inode+0x2c/0x74 new_inode_pseudo+0xf/0x48 new_inode+0x15/0x25 tracefs_get_inode+0x23/0x7c ? lookup_one_len+0x54/0x6c tracefs_create_file+0x53/0x11d trace_create_file+0x15/0x33 event_create_dir+0x2a3/0x34b __trace_add_new_event+0x1c/0x26 event_trace_add_tracer+0x56/0x86 trace_array_create+0x13e/0x1e1 instance_mkdir+0x8/0x17 tracefs_syscall_mkdir+0x39/0x50 ? get_dname+0x31/0x31 vfs_mkdir+0x78/0xa3 do_mkdirat+0x71/0xb0 sys_mkdir+0x19/0x1b do_fast_syscall_32+0xb0/0xed I bisected this down to the addition of the proxy_ops into tracefs for lockdown. It appears that the allocation of the proxy_ops and then freeing it in the destroy_inode callback, is causing havoc with the memory system. Reading the documentation about destroy_inode and talking with Linus about this, this is buggy and wrong. When defining the destroy_inode() method, it is expected that the destroy_inode() will also free the inode, and not just the extra allocations done in the creation of the inode. The faulty commit causes a memory leak of the inode data structure when they are deleted. Instead of allocating the proxy_ops (and then having to free it) the checks should be done by the open functions themselves, and not hack into the tracefs directory. First revert the tracefs updates for locked_down and then later we can add the locked_down checks in the kernel/trace files. Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home Fixes: ccbd54ff54e8 ("tracefs: Restrict tracefs when the kernel is locked down") Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
* | Merge tag 'hwmon-for-v5.4-rc3' of ↵Linus Torvalds2019-10-135-9/+47
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon fixes from Guenter Roeck: - Update/fix inspur-ipsps1 and k10temp Documentation - Fix nct7904 driver - Fix HWMON_P_MIN_ALARM mask in hwmon core * tag 'hwmon-for-v5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: docs: Extend inspur-ipsps1 title underline hwmon: (nct7904) Add array fan_alarm and vsen_alarm to store the alarms in nct7904_data struct. docs: hwmon: Include 'inspur-ipsps1.rst' into docs hwmon: Fix HWMON_P_MIN_ALARM mask hwmon: (k10temp) Update documentation and add temp2_input info hwmon: (nct7904) Fix the incorrect value of vsen_mask in nct7904_data struct
| * | hwmon: docs: Extend inspur-ipsps1 title underlineAdam Zerella2019-10-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Sphinx is generating a build warning as the title underline of this file is too short. Signed-off-by: Adam Zerella <adam.zerella@gmail.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * | hwmon: (nct7904) Add array fan_alarm and vsen_alarm to store the alarms in ↵amy.shih2019-10-021-2/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nct7904_data struct. SMI# interrupt for fan and voltage is Two-Times Interrupt Mode. Fan or voltage exceeds high limit or going below low limit, it will causes an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. Thus, add the array fan_alarm and vsen_alarm to store the alarms for all of the fan and voltage sensors. Signed-off-by: amy.shih <amy.shih@advantech.com.tw> Link: https://lore.kernel.org/r/20190919030205.11440-1-Amy.Shih@advantech.com.tw Fixes: 486842db3b79 ("hwmon: (nct7904) Add extra sysfs support for fan, voltage and temperature.") Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * | docs: hwmon: Include 'inspur-ipsps1.rst' into docsAdam Zerella2019-10-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When generating documentation output Sphinx outputs a warning for not including the page 'inspur-ipsps1.rst' in 'index.rst'. Assuming this documentation is useful it should be included in the index. Signed-off-by: Adam Zerella <adam.zerella@gmail.com> Link: https://lore.kernel.org/r/20190925131715.GB19073@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * | hwmon: Fix HWMON_P_MIN_ALARM maskNuno Sá2019-10-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both HWMON_P_MIN_ALARM and HWMON_P_MAX_ALARM were using BIT(hwmon_power_max_alarm). Fixes: aa7f29b07c870 ("hwmon: Add support for power min, lcrit, min_alarm and lcrit_alarm") CC: <stable@vger.kernel.org> Signed-off-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20190924124945.491326-2-nuno.sa@analog.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * | hwmon: (k10temp) Update documentation and add temp2_input infoLukas Zapletal2019-10-021-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's been a while since the k10temp documentation has been updated. There are new CPU families supported as well as Tdie temp was added. This patch adds all missing families which I was able to find from git history and provides more info about Tctl vs Tdie exported temps. Signed-off-by: Lukas Zapletal <lzap+git@redhat.com> Link: https://lore.kernel.org/r/20190923105931.27881-1-lzap+git@redhat.com [groeck: Formatting] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * | hwmon: (nct7904) Fix the incorrect value of vsen_mask in nct7904_data structamy.shih2019-10-021-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Voltage sensors overlap with external temperature sensors. Detect the multi-function of voltage, thermal diode and thermistor from register VT_ADC_MD_REG to set value of vsen_mask in nct7904_data struct. Signed-off-by: amy.shih <amy.shih@advantech.com.tw> Link: https://lore.kernel.org/r/20190918084801.9859-1-Amy.Shih@advantech.com.tw Signed-off-by: Guenter Roeck <linux@roeck-us.net>
* | | Merge tag 'fixes-for-5.4-rc3' of ↵Linus Torvalds2019-10-132-4/+3
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux Pull MTD fixes from Richard Weinberger: "Two fixes for MTD: - spi-nor: Fix for a regression in write_sr() - rawnand: Regression fix for the au1550nd driver" * tag 'fixes-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: mtd: rawnand: au1550nd: Fix au_read_buf16() prototype mtd: spi-nor: Fix direction of the write_sr() transfer
| * | | mtd: rawnand: au1550nd: Fix au_read_buf16() prototypePaul Burton2019-10-071-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 7e534323c416 ("mtd: rawnand: Pass a nand_chip object to chip->read_xxx() hooks") modified the prototype of the struct nand_chip read_buf function pointer. In the au1550nd driver we have 2 implementations of read_buf. The previously mentioned commit modified the au_read_buf() implementation to match the function pointer, but not au_read_buf16(). This results in a compiler warning for MIPS db1xxx_defconfig builds: drivers/mtd/nand/raw/au1550nd.c:443:57: warning: pointer type mismatch in conditional expression Fix this by updating the prototype of au_read_buf16() to take a struct nand_chip pointer as its first argument, as is expected after commit 7e534323c416 ("mtd: rawnand: Pass a nand_chip object to chip->read_xxx() hooks"). Note that this shouldn't have caused any functional issues at runtime, since the offset of the struct mtd_info within struct nand_chip is 0 making mtd_to_nand() effectively a type-cast. Signed-off-by: Paul Burton <paul.burton@mips.com> Fixes: 7e534323c416 ("mtd: rawnand: Pass a nand_chip object to chip->read_xxx() hooks") Cc: stable@vger.kernel.org # v4.20+ Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
| * | | mtd: spi-nor: Fix direction of the write_sr() transferTudor Ambarus2019-10-041-1/+1
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | write_sr() sends data to the SPI memory, fix the direction. Fixes: b35b9a10362d ("mtd: spi-nor: Move m25p80 code in spi-nor.c") Reported-by: John Garry <john.garry@huawei.com> Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Tested-by: John Garry <john.garry@huawei.com> Acked-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
* | | Merge tag 'for-linus-20191012' of git://git.kernel.dk/linux-blockLinus Torvalds2019-10-131-17/+20
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull io_uring fix from Jens Axboe: "Single small fix for a regression in the sequence logic for linked commands" * tag 'for-linus-20191012' of git://git.kernel.dk/linux-block: io_uring: fix sequence logic for timeout requests
| * | | io_uring: fix sequence logic for timeout requestsJens Axboe2019-10-101-17/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have two ways a request can be deferred: 1) It's a regular request that depends on another one 2) It's a timeout that tracks completions We have a shared helper to determine whether to defer, and that attempts to make the right decision based on the request. But we only have some of this information in the caller. Un-share the two timeout/defer helpers so the caller can use the right one. Fixes: 5262f567987d ("io_uring: IORING_OP_TIMEOUT support") Reported-by: yangerkun <yangerkun@huawei.com> Reviewed-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | | | Merge tag 'char-misc-5.4-rc3' of ↵Linus Torvalds2019-10-1213-18/+60
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver fixes from Greg KH: "Here are some small char/misc driver fixes for 5.4-rc3. Nothing huge here. Some binder driver fixes (although it is still being discussed if these all fix the reported issues or not, so more might be coming later), some mei device ids and fixes, and a google firmware driver bugfix that fixes a regression, as well as some other tiny fixes. All have been in linux-next with no reported issues" * tag 'char-misc-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: firmware: google: increment VPD key_len properly w1: ds250x: Fix build error without CRC16 virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr binder: Fix comment headers on binder_alloc_prepare_to_free() binder: prevent UAF read in print_binder_transaction_log_entry() misc: fastrpc: prevent memory leak in fastrpc_dma_buf_attach mei: avoid FW version request on Ibex Peak and earlier mei: me: add comet point (lake) LP device ids
| * | | | firmware: google: increment VPD key_len properlyBrian Norris2019-10-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4b708b7b1a2c ("firmware: google: check if size is valid when decoding VPD data") adds length checks, but the new vpd_decode_entry() function botched the logic -- it adds the key length twice, instead of adding the key and value lengths separately. On my local system, this means vpd.c's vpd_section_create_attribs() hits an error case after the first attribute it parses, since it's no longer looking at the correct offset. With this patch, I'm back to seeing all the correct attributes in /sys/firmware/vpd/... Fixes: 4b708b7b1a2c ("firmware: google: check if size is valid when decoding VPD data") Cc: <stable@vger.kernel.org> Cc: Hung-Te Lin <hungte@chromium.org> Signed-off-by: Brian Norris <briannorris@chromium.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Link: https://lore.kernel.org/r/20190930214522.240680-1-briannorris@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | w1: ds250x: Fix build error without CRC16YueHaibing2019-10-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If CRC16 is not set, building will fails: drivers/w1/slaves/w1_ds250x.o: In function `w1_ds2505_read_page': w1_ds250x.c:(.text+0x82f): undefined reference to `crc16' w1_ds250x.c:(.text+0x90a): undefined reference to `crc16' w1_ds250x.c:(.text+0x91a): undefined reference to `crc16' Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: 25ec8710d9c2 ("w1: add DS2501, DS2502, DS2505 EPROM device driver") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20190920060318.35020-1-yuehaibing@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | virt: vbox: fix memory leak in hgcm_call_preprocess_linaddrNavid Emamdoost2019-10-101-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In hgcm_call_preprocess_linaddr memory is allocated for bounce_buf but is not released if copy_form_user fails. In order to prevent memory leak in case of failure, the assignment to bounce_buf_ret is moved before the error check. This way the allocated bounce_buf will be released by the caller. Fixes: 579db9d45cb4 ("virt: Add vboxguest VMMDEV communication code") Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20190930204223.3660-1-navid.emamdoost@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | binder: Fix comment headers on binder_alloc_prepare_to_free()Joel Fernandes (Google)2019-10-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | binder_alloc_buffer_lookup() doesn't exist and is named "binder_alloc_prepare_to_free()". Correct the code comments to reflect this. Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/20190930201250.139554-1-joel@joelfernandes.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | binder: prevent UAF read in print_binder_transaction_log_entry()Christian Brauner2019-10-102-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a binder transaction is initiated on a binder device coming from a binderfs instance, a pointer to the name of the binder device is stashed in the binder_transaction_log_entry's context_name member. Later on it is used to print the name in print_binder_transaction_log_entry(). By the time print_binder_transaction_log_entry() accesses context_name binderfs_evict_inode() might have already freed the associated memory thereby causing a UAF. Do the simple thing and prevent this by copying the name of the binder device instead of stashing a pointer to it. Reported-by: Jann Horn <jannh@google.com> Fixes: 03e2e07e3814 ("binder: Make transaction_log available in binderfs") Link: https://lore.kernel.org/r/CAG48ez14Q0-F8LqsvcNbyR2o6gPW8SHXsm4u5jmD9MpsteM2Tw@mail.gmail.com Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Acked-by: Todd Kjos <tkjos@google.com> Reviewed-by: Hridya Valsaraju <hridya@google.com> Link: https://lore.kernel.org/r/20191008130159.10161-1-christian.brauner@ubuntu.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | misc: fastrpc: prevent memory leak in fastrpc_dma_buf_attachNavid Emamdoost2019-10-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In fastrpc_dma_buf_attach if dma_get_sgtable fails the allocated memory for a should be released. Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> Link: https://lore.kernel.org/r/20190925152742.16258-1-navid.emamdoost@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | mei: avoid FW version request on Ibex Peak and earlierAlexander Usyskin2019-10-045-13/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The fixed MKHI client on PCH 6 gen platforms does not support fw version retrieval. The error is not fatal, but it fills up the kernel logs and slows down the driver start. This patch disables requesting FW version on GEN6 and earlier platforms. Fixes warning: [ 15.964298] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could not read FW version [ 15.964301] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: version command failed -5 Cc: <stable@vger.kernel.org> +v4.18 Cc: Paul Menzel <pmenzel@molgen.mpg.de> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191004181722.31374-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * | | | mei: me: add comet point (lake) LP device idsTomas Winkler2019-10-042-0/+6
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add Comet Point devices IDs for Comet Lake U platforms. Cc: <stable@vger.kernel.org> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191001235958.19979-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | | | Merge tag 'staging-5.4-rc3' of ↵Linus Torvalds2019-10-1238-2333/+695
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO driver fixes from Greg KH: "Here are some staging and IIO driver fixes for 5.4-rc3. The "biggest" thing here is a removal of the fbtft device and flexfb code as they have been abandoned by their authors and are no longer needed for that hardware. Other than that, the usual amount of staging driver and iio driver fixes for reported issues, and some speakup sysfs file documentation, which has been long awaited for. All have been in linux-next with no reported issues" * tag 'staging-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (32 commits) iio: Fix an undefied reference error in noa1305_probe iio: light: opt3001: fix mutex unlock race iio: adc: ad799x: fix probe error handling iio: light: add missing vcnl4040 of_compatible iio: light: fix vcnl4000 devicetree hooks iio: imu: st_lsm6dsx: fix waitime for st_lsm6dsx i2c controller iio: adc: axp288: Override TS pin bias current for some models iio: imu: adis16400: fix memory leak iio: imu: adis16400: release allocated memory on failure iio: adc: stm32-adc: fix a race when using several adcs with dma and irq iio: adc: stm32-adc: move registers definitions iio: accel: adxl372: Perform a reset at start up iio: accel: adxl372: Fix push to buffers lost samples iio: accel: adxl372: Fix/remove limitation for FIFO samples iio: adc: hx711: fix bug in sampling of data staging: vt6655: Fix memory leak in vt6655_probe staging: exfat: Use kvzalloc() instead of kzalloc() for exfat_sb_info Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc staging: speakup: document sysfs attributes staging: rtl8188eu: fix HighestRate check in odm_ARFBRefresh_8188E() ...
| * \ \ \ Merge tag 'iio-fixes-for-5.4a' of ↵Greg Kroah-Hartman2019-10-1016-182/+290
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO fixes for the 5.4 cycle. * adis16400 - Make sure to free memory on a few failure paths. * adxl372 - Fix wrong fifo depth - Fix wrong indexing of data from the fifo. - Perform a reset at startup to avoid a problem with inconsistent state. * axp288 - This is a fix for a fix. The original fix made sure we kept the configuration from some firmwares to preserve a bias current. Unfortunately it appears the previous behaviour was working around a buggy firmware by overwriting the wrong value it had. Hence a regression was seen. * bmc150 - Fix the centre temperature. This was due to an error in one of the datasheets. * hx711 - Fix an issue where a badly timed interrupt could lead to a control line being high long enough to put the device into a low power state. * meson_sar_adc - Fix a case where the irq was enabled before everything it uses was allocated. * st_lsm6dsx - Ensure we don't set the sensor sensitivity to 0 as it will force all readings to 0. - Fix a wait time for the slave i2c controller when the accelerometer is not enabled. * stm32-adc - Precursor for fix. Move a set of register definitions to a header. - Fix a race when several ADCs are in use with some using interrupts to control the dataflow and some using DMA. * vcnl4000 - Fix a garbage of_match_table in which a string was passed instead of the intended enum. * tag 'iio-fixes-for-5.4a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: iio: Fix an undefied reference error in noa1305_probe iio: light: opt3001: fix mutex unlock race iio: adc: ad799x: fix probe error handling iio: light: add missing vcnl4040 of_compatible iio: light: fix vcnl4000 devicetree hooks iio: imu: st_lsm6dsx: fix waitime for st_lsm6dsx i2c controller iio: adc: axp288: Override TS pin bias current for some models iio: imu: adis16400: fix memory leak iio: imu: adis16400: release allocated memory on failure iio: adc: stm32-adc: fix a race when using several adcs with dma and irq iio: adc: stm32-adc: move registers definitions iio: accel: adxl372: Perform a reset at start up iio: accel: adxl372: Fix push to buffers lost samples iio: accel: adxl372: Fix/remove limitation for FIFO samples iio: adc: hx711: fix bug in sampling of data iio: fix center temperature of bmc150-accel-core iio: imu: st_lsm6dsx: forbid 0 sensor sensitivity iio: adc: meson_saradc: Fix memory allocation order
| | * | | | iio: Fix an undefied reference error in noa1305_probezhong jiang2019-10-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I hit the following error when compile the kernel. drivers/iio/light/noa1305.o: In function `noa1305_probe': noa1305.c:(.text+0x65): undefined reference to `__devm_regmap_init_i2c' make: *** [vmlinux] Error 1 Signed-off-by: zhong jiang <zhongjiang@huawei.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| | * | | | iio: light: opt3001: fix mutex unlock raceDavid Frey2019-10-091-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When an end-of-conversion interrupt is received after performing a single-shot reading of the light sensor, the driver was waking up the result ready queue before checking opt->ok_to_ignore_lock to determine if it should unlock the mutex. The problem occurred in the case where the other thread woke up and changed the value of opt->ok_to_ignore_lock to false prior to the interrupt thread performing its read of the variable. In this case, the mutex would be unlocked twice. Signed-off-by: David Frey <dpfrey@gmail.com> Reviewed-by: Andreas Dannenberg <dannenberg@ti.com> Fixes: 94a9b7b1809f ("iio: light: add support for TI's opt3001 light sensor") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-17 16:23:24 +0000