diff options
| author | Jiri Olsa <[email protected]> | 2018-04-15 11:23:50 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2018-04-17 09:47:39 -0300 |
| commit | 78b562fbfa2cf0a9fcb23c3154756b690f4905c1 (patch) | |
| tree | 4b2a92fe7d29a3ee696b16d7f035c7ba88c1101c | |
| parent | 038586c34301578e538f6c5aa79ca82bce1b9152 (diff) | |
perf: Return proper values for user stack errors
Return immediately when we find issue in the user stack checks. The
error value could get overwritten by following check for
PERF_SAMPLE_REGS_INTR.
Signed-off-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Fixes: 60e2364e60e8 ("perf: Add ability to sample machine state on interrupt")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -rw-r--r-- | kernel/events/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 1bae80aaabfb..67612ce359ad 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10209,9 +10209,9 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr, * __u16 sample size limit. */ if (attr->sample_stack_user >= USHRT_MAX) - ret = -EINVAL; + return -EINVAL; else if (!IS_ALIGNED(attr->sample_stack_user, sizeof(u64))) - ret = -EINVAL; + return -EINVAL; } if (!attr->sample_max_stack) |