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| author | Kees Cook <keescook@chromium.org> | 2023-01-24 10:51:05 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-01 08:27:21 +0100 |
| commit | fc636b1362729c1fee923175ed30988cbe3a3253 (patch) | |
| tree | 29f2b8a28d6a0a5777feb7c04c9cf3552f40d5d8 | |
| parent | 339f8a8e521179dbe53b6e2a19b775aed4c4a4d0 (diff) | |
| download | linux-stable-fc636b1362729c1fee923175ed30988cbe3a3253.tar.gz linux-stable-fc636b1362729c1fee923175ed30988cbe3a3253.tar.bz2 linux-stable-fc636b1362729c1fee923175ed30988cbe3a3253.zip | |
exit: Allow oops_limit to be disabled
commit de92f65719cd672f4b48397540b9f9eff67eca40 upstream.
In preparation for keeping oops_limit logic in sync with warn_limit,
have oops_limit == 0 disable checking the Oops counter.
Cc: Jann Horn <jannh@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 5 | ||||
| -rw-r--r-- | kernel/exit.c | 2 |
2 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index b6e68d6f297e..d6f1d3892e71 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -675,8 +675,9 @@ oops_limit ========== Number of kernel oopses after which the kernel should panic when -``panic_on_oops`` is not set. Setting this to 0 or 1 has the same effect -as setting ``panic_on_oops=1``. +``panic_on_oops`` is not set. Setting this to 0 disables checking +the count. Setting this to 1 has the same effect as setting +``panic_on_oops=1``. The default value is 10000. osrelease, ostype & version diff --git a/kernel/exit.c b/kernel/exit.c index f68a9c6adfc9..f6c85101dba0 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -941,7 +941,7 @@ void __noreturn make_task_dead(int signr) * To make sure this can't happen, place an upper bound on how often the * kernel may oops without panic(). */ - if (atomic_inc_return(&oops_count) >= READ_ONCE(oops_limit)) + if (atomic_inc_return(&oops_count) >= READ_ONCE(oops_limit) && oops_limit) panic("Oopsed too often (kernel.oops_limit is %d)", oops_limit); do_exit(signr); |