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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2017-08-10 15:23:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-08-10 15:54:06 -0700 |
| commit | 9eeb52ae712e72141c4c1d173048a606ba8f42f6 (patch) | |
| tree | bb6ed5065441552c7d799a839e084e6f0dd23b1d | |
| parent | 4e98ebe5f435fbe5bca91c24bc5d5a2b33025e08 (diff) | |
| download | linux-9eeb52ae712e72141c4c1d173048a606ba8f42f6.tar.bz2 | |
fault-inject: fix wrong should_fail() decision in task context
Commit 1203c8e6fb0a ("fault-inject: simplify access check for fail-nth")
unintentionally broke a conditional statement in should_fail(). Any
faults are not injected in the task context by the change when the
systematic fault injection is not used.
This change restores to the previous correct behaviour.
Link: http://lkml.kernel.org/r/1501633700-3488-1-git-send-email-akinobu.mita@gmail.com
Fixes: 1203c8e6fb0a ("fault-inject: simplify access check for fail-nth")
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reported-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Tested-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | lib/fault-inject.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/fault-inject.c b/lib/fault-inject.c index 7d315fdb9f13..cf7b129b0b2b 100644 --- a/lib/fault-inject.c +++ b/lib/fault-inject.c @@ -110,10 +110,12 @@ bool should_fail(struct fault_attr *attr, ssize_t size) if (in_task()) { unsigned int fail_nth = READ_ONCE(current->fail_nth); - if (fail_nth && !WRITE_ONCE(current->fail_nth, fail_nth - 1)) - goto fail; + if (fail_nth) { + if (!WRITE_ONCE(current->fail_nth, fail_nth - 1)) + goto fail; - return false; + return false; + } } /* No need to check any other properties if the probability is 0 */ |