| Commit message (Collapse) | Author | Age | Files | Lines |
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This commit renames 'kunitconfig' to '.kunitconfig' so that it can be
automatically ignored by git and do not disturb people who want to type
'kernel/' by pressing only the 'k' and then 'tab' key.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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'kunit' writes the 'test.log' under the kernel source directory even
though a 'build_dir' option is given. As users who use the option might
expect the outputs to be placed under the specified directory, this
commit modifies the logic to write the log file under the 'build_dir'.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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If both '--build_dir' and '--defconfig' are given, the handling of
'--defconfig' ignores '--build_dir' option. This commit modifies the
behavior to respect '--build_dir' option.
Reported-by: Brendan Higgins <brendanhiggins@google.com>
Suggested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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'--defconfig' option is handled by the 'main() of the 'kunit.py' but
again handled in following 'run_tests()'. This commit removes this
duplicated handling of the option in the 'run_tests()'.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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The kunit doc suggests users to get the default `kunitconfig` from an
external git tree. However, the file is already located under the
`arch/um/configs/` of the kernel tree. Because the local file is easier
to access and maintain, this commit updates the doc to use it.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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livepatch test configures the system and debug environment to run
tests. Some of these actions fail without root access and test
dumps several permission denied messages before it exits.
Fix test-state.sh to call setup_config instead of set_dynamic_debug
as suggested by Petr Mladek <pmladek@suse.com>
Fix it to check root uid and exit with skip code instead.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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firmware attempts to load test modules that require root access
and fail. Fix it to check for root uid and exit with skip code
instead.
Before this fix:
selftests: firmware: fw_run_tests.sh
modprobe: ERROR: could not insert 'test_firmware': Operation not permitted
You must have the following enabled in your kernel:
CONFIG_TEST_FIRMWARE=y
CONFIG_FW_LOADER=y
CONFIG_FW_LOADER_USER_HELPER=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
not ok 1 selftests: firmware: fw_run_tests.sh # SKIP
With this fix:
selftests: firmware: fw_run_tests.sh
skip all tests: must be run as root
not ok 1 selftests: firmware: fw_run_tests.sh # SKIP
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Reviwed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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epoll build fails to find pthread lib. Fix Makefile to use LDLIBS
instead of LDFLAGS. LDLIBS is the right flag to use here with -l
option when invoking ld.
gcc -I../../../../../usr/include/ -lpthread epoll_wakeup_test.c -o .../tools/testing/selftests/filesystems/epoll/epoll_wakeup_test
/usr/bin/ld: /tmp/ccaZvJUl.o: in function `kill_timeout':
epoll_wakeup_test.c:(.text+0x4dd): undefined reference to `pthread_kill'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x4f2): undefined reference to `pthread_kill'
/usr/bin/ld: /tmp/ccaZvJUl.o: in function `epoll9':
epoll_wakeup_test.c:(.text+0x6382): undefined reference to `pthread_create'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x64d2): undefined reference to `pthread_create'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x6626): undefined reference to `pthread_join'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x684c): undefined reference to `pthread_tryjoin_np'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x6864): undefined reference to `pthread_kill'
/usr/bin/ld: epoll_wakeup_test.c:(.text+0x6878): undefined reference to `pthread_join'
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Pull vfs fixes from Al Viro:
"Eric's s_inodes softlockup fixes + Jan's fix for recent regression
from pipe rework"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: call fsnotify_sb_delete after evict_inodes
fs: avoid softlockups in s_inodes iterators
pipe: Fix bogus dereference in iov_iter_alignment()
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When a filesystem is unmounted, we currently call fsnotify_sb_delete()
before evict_inodes(), which means that fsnotify_unmount_inodes()
must iterate over all inodes on the superblock looking for any inodes
with watches. This is inefficient and can lead to livelocks as it
iterates over many unwatched inodes.
At this point, SB_ACTIVE is gone and dropping refcount to zero kicks
the inode out out immediately, so anything processed by
fsnotify_sb_delete / fsnotify_unmount_inodes gets evicted in that loop.
After that, the call to evict_inodes will evict everything else with a
zero refcount.
This should speed things up overall, and avoid livelocks in
fsnotify_unmount_inodes().
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Anything that walks all inodes on sb->s_inodes list without rescheduling
risks softlockups.
Previous efforts were made in 2 functions, see:
c27d82f fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
ac05fbb inode: don't softlockup when evicting inodes
but there hasn't been an audit of all walkers, so do that now. This
also consistently moves the cond_resched() calls to the bottom of each
loop in cases where it already exists.
One loop remains: remove_dquot_ref(), because I'm not quite sure how
to deal with that one w/o taking the i_lock.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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We cannot look at 'i->pipe' unless we know the iter is a pipe. Move the
ring_size load to a branch in iov_iter_alignment() where we've already
checked the iter is a pipe to avoid bogus dereference.
Reported-by: syzbot+bea68382bae9490e7dd6@syzkaller.appspotmail.com
Fixes: 8cefc107ca54 ("pipe: Use head and tail pointers for the ring, not cursor and length")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Pull xfs fixes from Darrick Wong:
"Fix a few bugs that could lead to corrupt files, fsck complaints, and
filesystem crashes:
- Minor documentation fixes
- Fix a file corruption due to read racing with an insert range
operation.
- Fix log reservation overflows when allocating large rt extents
- Fix a buffer log item flags check
- Don't allow administrators to mount with sunit= options that will
cause later xfs_repair complaints about the root directory being
suspicious because the fs geometry appeared inconsistent
- Fix a non-static helper that should have been static"
* tag 'xfs-5.5-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: Make the symbol 'xfs_rtalloc_log_count' static
xfs: don't commit sunit/swidth updates to disk if that would cause repair failures
xfs: split the sunit parameter update into two parts
xfs: refactor agfl length computation function
libxfs: resync with the userspace libxfs
xfs: use bitops interface for buf log item AIL flag check
xfs: fix log reservation overflows when allocating large rt extents
xfs: stabilize insert range start boundary to avoid COW writeback race
xfs: fix Sphinx documentation warning
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Fix the following sparse warning:
fs/xfs/libxfs/xfs_trans_resv.c:206:1: warning: symbol 'xfs_rtalloc_log_count' was not declared. Should it be static?
Fixes: b1de6fc7520f ("xfs: fix log reservation overflows when allocating large rt extents")
Signed-off-by: Chen Wandun <chenwandun@huawei.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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failures
Alex Lyakas reported[1] that mounting an xfs filesystem with new sunit
and swidth values could cause xfs_repair to fail loudly. The problem
here is that repair calculates the where mkfs should have allocated the
root inode, based on the superblock geometry. The allocation decisions
depend on sunit, which means that we really can't go updating sunit if
it would lead to a subsequent repair failure on an otherwise correct
filesystem.
Port from xfs_repair some code that computes the location of the root
inode and teach mount to skip the ondisk update if it would cause
problems for repair. Along the way we'll update the documentation,
provide a function for computing the minimum AGFL size instead of
open-coding it, and cut down some indenting in the mount code.
Note that we allow the mount to proceed (and new allocations will
reflect this new geometry) because we've never screened this kind of
thing before. We'll have to wait for a new future incompat feature to
enforce correct behavior, alas.
Note that the geometry reporting always uses the superblock values, not
the incore ones, so that is what xfs_info and xfs_growfs will report.
[1] https://lore.kernel.org/linux-xfs/20191125130744.GA44777@bfoster/T/#m00f9594b511e076e2fcdd489d78bc30216d72a7d
Reported-by: Alex Lyakas <alex@zadara.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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If the administrator provided a sunit= mount option, we need to validate
the raw parameter, convert the mount option units (512b blocks) into the
internal unit (fs blocks), and then validate that the (now cooked)
parameter doesn't screw anything up on disk. The incore inode geometry
computation can depend on the new sunit option, but a subsequent patch
will make validating the cooked value depends on the computed inode
geometry, so break the sunit update into two steps.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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Refactor xfs_alloc_min_freelist to accept a NULL @pag argument, in which
case it returns the largest possible minimum length. This will be used
in an upcoming patch to compute the length of the AGFL at mkfs time.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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Prepare to resync the userspace libxfs with the kernel libxfs. There
were a few things I missed -- a couple of static inline directory
functions that have to be exported for xfs_repair; a couple of directory
naming functions that make porting much easier if they're /not/ static
inline; and a u16 usage that should have been uint16_t.
None of these things are bugs in their own right; this just makes
porting xfsprogs easier.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
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The xfs_log_item flags were converted to atomic bitops as of commit
22525c17ed ("xfs: log item flags are racy"). The assert check for
AIL presence in xfs_buf_item_relse() still uses the old value based
check. This likely went unnoticed as XFS_LI_IN_AIL evaluates to 0
and causes the assert to unconditionally pass. Fix up the check.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Fixes: 22525c17ed ("xfs: log item flags are racy")
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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Omar Sandoval reported that a 4G fallocate on the realtime device causes
filesystem shutdowns due to a log reservation overflow that happens when
we log the rtbitmap updates. Factor rtbitmap/rtsummary updates into the
the tr_write and tr_itruncate log reservation calculation.
"The following reproducer results in a transaction log overrun warning
for me:
mkfs.xfs -f -r rtdev=/dev/vdc -d rtinherit=1 -m reflink=0 /dev/vdb
mount -o rtdev=/dev/vdc /dev/vdb /mnt
fallocate -l 4G /mnt/foo
Reported-by: Omar Sandoval <osandov@osandov.com>
Tested-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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generic/522 (fsx) occasionally fails with a file corruption due to
an insert range operation. The primary characteristic of the
corruption is a misplaced insert range operation that differs from
the requested target offset. The reason for this behavior is a race
between the extent shift sequence of an insert range and a COW
writeback completion that causes a front merge with the first extent
in the shift.
The shift preparation function flushes and unmaps from the target
offset of the operation to the end of the file to ensure no
modifications can be made and page cache is invalidated before file
data is shifted. An insert range operation then splits the extent at
the target offset, if necessary, and begins to shift the start
offset of each extent starting from the end of the file to the start
offset. The shift sequence operates at extent level and so depends
on the preparation sequence to guarantee no changes can be made to
the target range during the shift. If the block immediately prior to
the target offset was dirty and shared, however, it can undergo
writeback and move from the COW fork to the data fork at any point
during the shift. If the block is contiguous with the block at the
start offset of the insert range, it can front merge and alter the
start offset of the extent. Once the shift sequence reaches the
target offset, it shifts based on the latest start offset and
silently changes the target offset of the operation and corrupts the
file.
To address this problem, update the shift preparation code to
stabilize the start boundary along with the full range of the
insert. Also update the existing corruption check to fail if any
extent is shifted with a start offset behind the target offset of
the insert range. This prevents insert from racing with COW
writeback completion and fails loudly in the event of an unexpected
extent shift.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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Fix Sphinx documentation format warning by not indenting so much.
Documentation/admin-guide/xfs.rst:257: WARNING: Block quote ends without a blank line; unexpected unindent.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bug fixes from Ted Ts'o:
"Ext4 bug fixes, including a regression fix"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: clarify impact of 'commit' mount option
ext4: fix unused-but-set-variable warning in ext4_add_entry()
jbd2: fix kernel-doc notation warning
ext4: use RCU API in debug_print_tree
ext4: validate the debug_want_extra_isize mount option at parse time
ext4: reserve revoke credits in __ext4_new_inode
ext4: unlock on error in ext4_expand_extra_isize()
ext4: optimize __ext4_check_dir_entry()
ext4: check for directory entries too close to block end
ext4: fix ext4_empty_dir() for directories with holes
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The description of 'commit' mount option dates back to ext3 times.
Update the description to match current meaning for ext4.
Reported-by: Paul Richards <paul.richards@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191218111210.14161-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Warning is found when compile with "-Wunused-but-set-variable":
fs/ext4/namei.c: In function ‘ext4_add_entry’:
fs/ext4/namei.c:2167:23: warning: variable ‘sbi’ set but not used
[-Wunused-but-set-variable]
struct ext4_sb_info *sbi;
^~~
Fix this by moving the variable @sbi under CONFIG_UNICODE.
Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/cb5eb904-224a-9701-c38f-cb23514b1fff@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Fix kernel-doc warning by inserting a beginning '*' character
for the kernel-doc line.
../include/linux/jbd2.h:461: warning: bad line: journal. These are dirty buffers and revoke descriptor blocks.
Link: https://lore.kernel.org/r/53e3ce27-ceae-560d-0fd4-f95728a33e12@infradead.org
Cc: stable@kernel.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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struct ext4_sb_info.system_blks was marked __rcu.
But access the pointer without using RCU lock and dereference.
Sparse warning with __rcu notation:
block_validity.c:139:29: warning: incorrect type in argument 1 (different address spaces)
block_validity.c:139:29: expected struct rb_root const *
block_validity.c:139:29: got struct rb_root [noderef] <asn:4> *
Link: https://lore.kernel.org/r/20191213153306.30744-1-tranmanphong@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Instead of setting s_want_extra_size and then making sure that it is a
valid value afterwards, validate the field before we set it. This
avoids races and other problems when remounting the file system.
Link: https://lore.kernel.org/r/20191215063020.GA11512@mit.edu
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-and-tested-by: syzbot+4a39a025912b265cacef@syzkaller.appspotmail.com
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It's possible that __ext4_new_inode will release the xattr block, so
it will trigger a warning since there is revoke credits will be 0 if
the handle == NULL. The below scripts can reproduce it easily.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3861 at fs/jbd2/revoke.c:374 jbd2_journal_revoke+0x30e/0x540 fs/jbd2/revoke.c:374
...
__ext4_forget+0x1d7/0x800 fs/ext4/ext4_jbd2.c:248
ext4_free_blocks+0x213/0x1d60 fs/ext4/mballoc.c:4743
ext4_xattr_release_block+0x55b/0x780 fs/ext4/xattr.c:1254
ext4_xattr_block_set+0x1c2c/0x2c40 fs/ext4/xattr.c:2112
ext4_xattr_set_handle+0xa7e/0x1090 fs/ext4/xattr.c:2384
__ext4_set_acl+0x54d/0x6c0 fs/ext4/acl.c:214
ext4_init_acl+0x218/0x2e0 fs/ext4/acl.c:293
__ext4_new_inode+0x352a/0x42b0 fs/ext4/ialloc.c:1151
ext4_mkdir+0x2e9/0xbd0 fs/ext4/namei.c:2774
vfs_mkdir+0x386/0x5f0 fs/namei.c:3811
do_mkdirat+0x11c/0x210 fs/namei.c:3834
do_syscall_64+0xa1/0x530 arch/x86/entry/common.c:294
...
-------------------------------------
scripts:
mkfs.ext4 /dev/vdb
mount /dev/vdb /mnt
cd /mnt && mkdir dir && for i in {1..8}; do setfacl -dm "u:user_"$i":rx" dir; done
mkdir dir/dir1 && mv dir/dir1 ./
sh repro.sh && add some user
[root@localhost ~]# cat repro.sh
while [ 1 -eq 1 ]; do
rm -rf dir
rm -rf dir1/dir1
mkdir dir
for i in {1..8}; do setfacl -dm "u:test"$i":rx" dir; done
setfacl -m "u:user_9:rx" dir &
mkdir dir1/dir1 &
done
Before exec repro.sh, dir1 has inherit the default acl from dir, and
xattr block of dir1 dir is not the same, so the h_refcount of these
two dir's xattr block will be 1. Then repro.sh can trigger the warning
with the situation show as below. The last h_refcount can be clear
with mkdir, and __ext4_new_inode has not reserved revoke credits, so
the warning will happened, fix it by reserve revoke credits in
__ext4_new_inode.
Thread 1 Thread 2
mkdir dir
set default acl(will create
a xattr block blk1 and the
refcount of ext4_xattr_header
will be 1)
...
mkdir dir1/dir1
->....->ext4_init_acl
->__ext4_set_acl(set default acl,
will reuse blk1, and h_refcount
will be 2)
setfacl->ext4_set_acl->...
->ext4_xattr_block_set(will create
new block blk2 to store xattr)
->__ext4_set_acl(set access acl, since
h_refcount of blk1 is 2, will create
blk3 to store xattr)
->ext4_xattr_release_block(dec
h_refcount of blk1 to 1)
->ext4_xattr_release_block(dec
h_refcount and since it is 0,
will release the block and trigger
the warning)
Link: https://lore.kernel.org/r/20191213014900.47228-1-yangerkun@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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We need to unlock the xattr before returning on this error path.
Cc: stable@kernel.org # 4.13
Fixes: c03b45b853f5 ("ext4, project: expand inode extra size if possible")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20191213185010.6k7yl2tck3wlsdkt@kili.mountain
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Make __ext4_check_dir_entry() a bit easier to understand, and reduce
the object size of the function by over 11%.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20191209004346.38526-1-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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ext4_check_dir_entry() currently does not catch a case when a directory
entry ends so close to the block end that the header of the next
directory entry would not fit in the remaining space. This can lead to
directory iteration code trying to access address beyond end of current
buffer head leading to oops.
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191202170213.4761-3-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Function ext4_empty_dir() doesn't correctly handle directories with
holes and crashes on bh->b_data dereference when bh is NULL. Reorganize
the loop to use 'offset' variable all the times instead of comparing
pointers to current direntry with bh->b_data pointer. Also add more
strict checking of '.' and '..' directory entries to avoid entering loop
in possibly invalid state on corrupted filesystems.
References: CVE-2019-19037
CC: stable@vger.kernel.org
Fixes: 4e19d6b65fb4 ("ext4: allow directory holes")
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191202170213.4761-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Pull block fixes from Jens Axboe:
"Let's try this one again, this time without the compat_ioctl changes.
We've got those fixed up, but that can go out next week.
This contains:
- block queue flush lockdep annotation (Bart)
- Type fix for bsg_queue_rq() (Bart)
- Three dasd fixes (Stefan, Jan)
- nbd deadlock fix (Mike)
- Error handling bio user map fix (Yang)
- iocost fix (Tejun)
- sbitmap waitqueue addition fix that affects the kyber IO scheduler
(David)"
* tag 'block-5.5-20191221' of git://git.kernel.dk/linux-block:
sbitmap: only queue kyber's wait callback if not already active
block: fix memleak when __blk_rq_map_user_iov() is failed
s390/dasd: fix typo in copyright statement
s390/dasd: fix memleak in path handling error case
s390/dasd/cio: Interpret ccw_device_get_mdc return value correctly
block: Fix a lockdep complaint triggered by request queue flushing
block: Fix the type of 'sts' in bsg_queue_rq()
block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT
nbd: fix shutdown and recv work deadlock v2
iocost: over-budget forced IOs should schedule async delay
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Under heavy loads where the kyber I/O scheduler hits the token limits for
its scheduling domains, kyber can become stuck. When active requests
complete, kyber may not be woken up leaving the I/O requests in kyber
stuck.
This stuck state is due to a race condition with kyber and the sbitmap
functions it uses to run a callback when enough requests have completed.
The running of a sbt_wait callback can race with the attempt to insert the
sbt_wait. Since sbitmap_del_wait_queue removes the sbt_wait from the list
first then sets the sbq field to NULL, kyber can see the item as not on a
list but the call to sbitmap_add_wait_queue will see sbq as non-NULL. This
results in the sbt_wait being inserted onto the wait list but ws_active
doesn't get incremented. So the sbitmap queue does not know there is a
waiter on a wait list.
Since sbitmap doesn't think there is a waiter, kyber may never be
informed that there are domain tokens available and the I/O never advances.
With the sbt_wait on a wait list, kyber believes it has an active waiter
so cannot insert a new waiter when reaching the domain's full state.
This race can be fixed by only adding the sbt_wait to the queue if the
sbq field is NULL. If sbq is not NULL, there is already an action active
which will trigger the re-running of kyber. Let it run and add the
sbt_wait to the wait list if still needing to wait.
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reported-by: John Pittman <jpittman@redhat.com>
Tested-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When I doing fuzzy test, get the memleak report:
BUG: memory leak
unreferenced object 0xffff88837af80000 (size 4096):
comm "memleak", pid 3557, jiffies 4294817681 (age 112.499s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
20 00 00 00 10 01 00 00 00 00 00 00 01 00 00 00 ...............
backtrace:
[<000000001c894df8>] bio_alloc_bioset+0x393/0x590
[<000000008b139a3c>] bio_copy_user_iov+0x300/0xcd0
[<00000000a998bd8c>] blk_rq_map_user_iov+0x2f1/0x5f0
[<000000005ceb7f05>] blk_rq_map_user+0xf2/0x160
[<000000006454da92>] sg_common_write.isra.21+0x1094/0x1870
[<00000000064bb208>] sg_write.part.25+0x5d9/0x950
[<000000004fc670f6>] sg_write+0x5f/0x8c
[<00000000b0d05c7b>] __vfs_write+0x7c/0x100
[<000000008e177714>] vfs_write+0x1c3/0x500
[<0000000087d23f34>] ksys_write+0xf9/0x200
[<000000002c8dbc9d>] do_syscall_64+0x9f/0x4f0
[<00000000678d8e9a>] entry_SYSCALL_64_after_hwframe+0x49/0xbe
If __blk_rq_map_user_iov() is failed in blk_rq_map_user_iov(),
the bio(s) which is allocated before this failing will leak. The
refcount of the bio(s) is init to 1 and increased to 2 by calling
bio_get(), but __blk_rq_unmap_user() only decrease it to 1, so
the bio cannot be freed. Fix it by calling blk_rq_unmap_user().
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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coypright -> copyright
Reported-by: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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If for whatever reason the dasd_eckd_check_characteristics() function
exits after at least some paths have their configuration data
allocated those data is never freed again. In the error case the
device->private pointer is set to NULL and dasd_eckd_uncheck_device()
will exit without freeing the path data because of this NULL pointer.
Fix by calling dasd_eckd_clear_conf_data() for error cases.
Also use dasd_eckd_clear_conf_data() in dasd_eckd_uncheck_device()
to avoid code duplication.
Reported-by: Qian Cai <cai@lca.pw>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The max data count (mdc) is an unsigned 16-bit integer value as per AR
documentation and is received via ccw_device_get_mdc() for a specific
path mask from the CIO layer. The function itself also always returns a
positive mdc value or 0 in case mdc isn't supported or couldn't be
determined.
Though, the comment for this function describes a negative return value
to indicate failures.
As a result, the DASD device driver interprets the return value of
ccw_device_get_mdc() incorrectly. The error case is essentially a dead
code path.
To fix this behaviour, check explicitly for a return value of 0 and
change the comment for ccw_device_get_mdc() accordingly.
This fix merely enables the error code path in the DASD functions
get_fcx_max_data() and verify_fcx_max_data(). The actual functionality
stays the same and is still correct.
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Avoid that running test nvme/012 from the blktests suite triggers the
following false positive lockdep complaint:
============================================
WARNING: possible recursive locking detected
5.0.0-rc3-xfstests-00015-g1236f7d60242 #841 Not tainted
--------------------------------------------
ksoftirqd/1/16 is trying to acquire lock:
000000000282032e (&(&fq->mq_flush_lock)->rlock){..-.}, at: flush_end_io+0x4e/0x1d0
but task is already holding lock:
00000000cbadcbc2 (&(&fq->mq_flush_lock)->rlock){..-.}, at: flush_end_io+0x4e/0x1d0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&fq->mq_flush_lock)->rlock);
lock(&(&fq->mq_flush_lock)->rlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
1 lock held by ksoftirqd/1/16:
#0: 00000000cbadcbc2 (&(&fq->mq_flush_lock)->rlock){..-.}, at: flush_end_io+0x4e/0x1d0
stack backtrace:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc3-xfstests-00015-g1236f7d60242 #841
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
dump_stack+0x67/0x90
__lock_acquire.cold.45+0x2b4/0x313
lock_acquire+0x98/0x160
_raw_spin_lock_irqsave+0x3b/0x80
flush_end_io+0x4e/0x1d0
blk_mq_complete_request+0x76/0x110
nvmet_req_complete+0x15/0x110 [nvmet]
nvmet_bio_done+0x27/0x50 [nvmet]
blk_update_request+0xd7/0x2d0
blk_mq_end_request+0x1a/0x100
blk_flush_complete_seq+0xe5/0x350
flush_end_io+0x12f/0x1d0
blk_done_softirq+0x9f/0xd0
__do_softirq+0xca/0x440
run_ksoftirqd+0x24/0x50
smpboot_thread_fn+0x113/0x1e0
kthread+0x121/0x140
ret_from_fork+0x3a/0x50
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This patch fixes the following sparse warnings:
block/bsg-lib.c:269:19: warning: incorrect type in initializer (different base types)
block/bsg-lib.c:269:19: expected int sts
block/bsg-lib.c:269:19: got restricted blk_status_t [usertype]
block/bsg-lib.c:286:16: warning: incorrect type in return expression (different base types)
block/bsg-lib.c:286:16: expected restricted blk_status_t
block/bsg-lib.c:286:16: got int [assigned] sts
Cc: Martin Wilck <mwilck@suse.com>
Fixes: d46fe2cb2dce ("block: drop device references in bsg_queue_rq()")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Non-mq devs do not honor REQ_NOWAIT so give a chance to the caller to repeat
request gracefully on -EAGAIN error.
The problem is well reproduced using io_uring:
mkfs.ext4 /dev/ram0
mount /dev/ram0 /mnt
# Preallocate a file
dd if=/dev/zero of=/mnt/file bs=1M count=1
# Start fio with io_uring and get -EIO
fio --rw=write --ioengine=io_uring --size=1M --direct=1 --name=job --filename=/mnt/file
Signed-off-by: Roman Penyaev <rpenyaev@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This fixes a regression added with:
commit e9e006f5fcf2bab59149cb38a48a4817c1b538b4
Author: Mike Christie <mchristi@redhat.com>
Date: Sun Aug 4 14:10:06 2019 -0500
nbd: fix max number of supported devs
where we can deadlock during device shutdown. The problem occurs if
the recv_work's nbd_config_put occurs after nbd_start_device_ioctl has
returned and the userspace app has droppped its reference via closing
the device and running nbd_release. The recv_work nbd_config_put call
would then drop the refcount to zero and try to destroy the config which
would try to do destroy_workqueue from the recv work.
This patch just has nbd_start_device_ioctl do a flush_workqueue when it
wakes so we know after the ioctl returns running works have exited. This
also fixes a possible race where we could try to reuse the device while
old recv_works are still running.
Cc: stable@vger.kernel.org
Fixes: e9e006f5fcf2 ("nbd: fix max number of supported devs")
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When over-budget IOs are force-issued through root cgroup,
iocg_kick_delay() adjusts the async delay accordingly but doesn't
actually schedule async throttle for the issuing task. This bug is
pretty well masked because sooner or later the offending threads are
gonna get directly throttled on regular IOs or have async delay
scheduled by mem_cgroup_throttle_swaprate().
However, it can affect control quality on filesystem metadata heavy
operations. Let's fix it by invoking blkcg_schedule_throttle() when
iocg_kick_delay() says async delay is needed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Cc: stable@vger.kernel.org
Reported-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Pull KVM fixes from Paolo Bonzini:
"PPC:
- Fix a bug where we try to do an ultracall on a system without an
ultravisor
KVM:
- Fix uninitialised sysreg accessor
- Fix handling of demand-paged device mappings
- Stop spamming the console on IMPDEF sysregs
- Relax mappings of writable memslots
- Assorted cleanups
MIPS:
- Now orphan, James Hogan is stepping down
x86:
- MAINTAINERS change, so long Radim and thanks for all the fish
- supported CPUID fixes for AMD machines without SPEC_CTRL"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
MAINTAINERS: remove Radim from KVM maintainers
MAINTAINERS: Orphan KVM for MIPS
kvm: x86: Host feature SSBD doesn't imply guest feature AMD_SSBD
kvm: x86: Host feature SSBD doesn't imply guest feature SPEC_CTRL_SSBD
KVM: PPC: Book3S HV: Don't do ultravisor calls on systems without ultravisor
KVM: arm/arm64: Properly handle faulting of device mappings
KVM: arm64: Ensure 'params' is initialised when looking up sys register
KVM: arm/arm64: Remove excessive permission check in kvm_arch_prepare_memory_region
KVM: arm64: Don't log IMP DEF sysreg traps
KVM: arm64: Sanely ratelimit sysreg messages
KVM: arm/arm64: vgic: Use wrapper function to lock/unlock all vcpus in kvm_vgic_create()
KVM: arm/arm64: vgic: Fix potential double free dist->spis in __kvm_vgic_destroy()
KVM: arm/arm64: Get rid of unused arg in cpu_init_hyp_mode()
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
PPC KVM fix for 5.5
- Fix a bug where we try to do an ultracall on a system without an
ultravisor.
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Commit 22945688acd4 ("KVM: PPC: Book3S HV: Support reset of secure
guest") added a call to uv_svm_terminate, which is an ultravisor
call, without any check that the guest is a secure guest or even that
the system has an ultravisor. On a system without an ultravisor,
the ultracall will degenerate to a hypercall, but since we are not
in KVM guest context, the hypercall will get treated as a system
call, which could have random effects depending on what happens to
be in r0, and could also corrupt the current task's kernel stack.
Hence this adds a test for the guest being a secure guest before
doing uv_svm_terminate().
Fixes: 22945688acd4 ("KVM: PPC: Book3S HV: Support reset of secure guest")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Radim's kernel.org email is bouncing, which I take as a signal that
he is not really able to deal with KVM at this time. Make MAINTAINERS
match the effective value of KVM's bus factor.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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I haven't been active for 18 months, and don't have the hardware set up
to test KVM for MIPS, so mark it as orphaned and remove myself as
maintainer. Hopefully somebody from MIPS can pick this up.
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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