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authorSumanth Korikkar <sumanthk@linux.ibm.com>2022-10-07 10:13:27 +0200
committerPeter Zijlstra <peterz@infradead.org>2022-10-17 16:32:06 +0200
commit21da7472a040420f2dc624ffec70291a72c5d6a6 (patch)
tree7e537657d30972aba8a9cecc7e5fe69ba44d7f1d /kernel
parent23488ec66867f7e673b694623a951fb583e464a7 (diff)
bpf: Fix sample_flags for bpf_perf_event_output
* Raw data is also filled by bpf_perf_event_output. * Add sample_flags to indicate raw data. * This eliminates the segfaults as shown below: Run ./samples/bpf/trace_output BUG pid 9 cookie 1001000000004 sized 4 BUG pid 9 cookie 1001000000004 sized 4 BUG pid 9 cookie 1001000000004 sized 4 Segmentation fault (core dumped) Fixes: 838d9bb62d13 ("perf: Use sample_flags for raw_data") Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/r/20221007081327.1047552-1-sumanthk@linux.ibm.com
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/bpf_trace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 49fb9ec8366d..1ed08967fb97 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -687,6 +687,7 @@ BPF_CALL_5(bpf_perf_event_output, struct pt_regs *, regs, struct bpf_map *, map,
perf_sample_data_init(sd, 0, 0);
sd->raw = &raw;
+ sd->sample_flags |= PERF_SAMPLE_RAW;
err = __bpf_perf_event_output(regs, map, flags, sd);
@@ -745,6 +746,7 @@ u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
perf_fetch_caller_regs(regs);
perf_sample_data_init(sd, 0, 0);
sd->raw = &raw;
+ sd->sample_flags |= PERF_SAMPLE_RAW;
ret = __bpf_perf_event_output(regs, map, flags, sd);
out: