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Date: Mon, 17 Oct 2022 14:45:27 -0000 From: "tip-bot2 for Sumanth Korikkar" <tip-bot2@...utronix.de> To: linux-tip-commits@...r.kernel.org Cc: Sumanth Korikkar <sumanthk@...ux.ibm.com>, "Peter Zijlstra (Intel)" <peterz@...radead.org>, Namhyung Kim <namhyung@...nel.org>, x86@...nel.org, linux-kernel@...r.kernel.org Subject: [tip: perf/urgent] bpf: Fix sample_flags for bpf_perf_event_output The following commit has been merged into the perf/urgent branch of tip: Commit-ID: 21da7472a040420f2dc624ffec70291a72c5d6a6 Gitweb: https://git.kernel.org/tip/21da7472a040420f2dc624ffec70291a72c5d6a6 Author: Sumanth Korikkar <sumanthk@...ux.ibm.com> AuthorDate: Fri, 07 Oct 2022 10:13:27 +02:00 Committer: Peter Zijlstra <peterz@...radead.org> CommitterDate: Mon, 17 Oct 2022 16:32:06 +02:00 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@...ux.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org> Acked-by: Namhyung Kim <namhyung@...nel.org> Link: https://lkml.kernel.org/r/20221007081327.1047552-1-sumanthk@linux.ibm.com --- kernel/trace/bpf_trace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 49fb9ec..1ed0896 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:
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