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authorJiri Olsa <jolsa@kernel.org>2018-04-15 12:23:50 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-04-17 15:47:39 +0300
commit78b562fbfa2cf0a9fcb23c3154756b690f4905c1 (patch)
tree4b2a92fe7d29a3ee696b16d7f035c7ba88c1101c /kernel/events/callchain.c
parent038586c34301578e538f6c5aa79ca82bce1b9152 (diff)
downloadlinux-78b562fbfa2cf0a9fcb23c3154756b690f4905c1.tar.xz
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 <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: syzkaller-bugs@googlegroups.com Cc: x86@kernel.org Fixes: 60e2364e60e8 ("perf: Add ability to sample machine state on interrupt") Link: http://lkml.kernel.org/r/20180415092352.12403-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/events/callchain.c')
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