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| author | Li Pengcheng <lipengcheng8@huawei.com> | 2016-11-05 10:15:59 +0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-11-08 16:44:33 -0800 |
| commit | 959217c84c2765434cd2cbf3d7ffdc09e90834f9 (patch) | |
| tree | 21a2ac73eabb5a19694a617440a51e2cdd650a5c /fs/pstore | |
| parent | 07d9a380680d1c0eb51ef87ff2eab5c994949e69 (diff) | |
| download | linux-959217c84c2765434cd2cbf3d7ffdc09e90834f9.tar.gz linux-959217c84c2765434cd2cbf3d7ffdc09e90834f9.tar.bz2 linux-959217c84c2765434cd2cbf3d7ffdc09e90834f9.zip | |
pstore: Actually give up during locking failure
Without a return after the pr_err(), dumps will collide when two threads
call pstore_dump() at the same time.
Signed-off-by: Liu Hailong <liuhailong5@huawei.com>
Signed-off-by: Li Pengcheng <lipengcheng8@huawei.com>
Signed-off-by: Li Zhong <lizhong11@hisilicon.com>
[kees: improved commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore')
| -rw-r--r-- | fs/pstore/platform.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 14984d902a99..60e6db6f5da2 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -493,6 +493,7 @@ static void pstore_dump(struct kmsg_dumper *dumper, if (!is_locked) { pr_err("pstore dump routine blocked in %s path, may corrupt error record\n" , in_nmi() ? "NMI" : why); + return; } } else { spin_lock_irqsave(&psinfo->buf_lock, flags); |