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Subject[PATCH 1/3] perf: Return proper values for user stack errors
Date
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 <jolsa@kernel.org>
---
kernel/events/core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index fc1c330c6bd6..4d997bc064d2 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10191,9 +10191,9 @@ 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)
--
2.13.6
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