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author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-21 14:49:42 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-21 14:49:42 -0700 |
commit | 7fb312d2256da63e6e4c6e92d279a90fe44bcabd (patch) | |
tree | 1efc4d6b2fc1c0a2e07bbeb5ce3b847d0004f4f6 /kernel/trace/trace_event_perf.c | |
parent | e3f259d33c0ebae1b6e4922c7cdb50e864c81928 (diff) | |
parent | b2380577d4fe1c0ef3fa50417f1e441c016e4cbe (diff) | |
download | linux-7fb312d2256da63e6e4c6e92d279a90fe44bcabd.tar.gz |
Merge tag 'trace-v6.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt: "Various fixes for tracing: - Fix a return value of traceprobe_parse_event_name() - Fix NULL pointer dereference from failed ftrace enabling - Fix NULL pointer dereference when asking for registers from eprobes - Make eprobes consistent with kprobes/uprobes, filters and histograms" * tag 'trace-v6.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Have filter accept "common_cpu" to be consistent tracing/probes: Have kprobes and uprobes use $COMM too tracing/eprobes: Have event probes be consistent with kprobes and uprobes tracing/eprobes: Fix reading of string fields tracing/eprobes: Do not hardcode $comm as a string tracing/eprobes: Do not allow eprobes to use $stack, or % for regs ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead tracing/perf: Fix double put of trace event when init fails tracing: React to error return from traceprobe_parse_event_name()
Diffstat (limited to 'kernel/trace/trace_event_perf.c')
-rw-r--r-- | kernel/trace/trace_event_perf.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index a114549720d6..61e3a2620fa3 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -157,7 +157,7 @@ static void perf_trace_event_unreg(struct perf_event *p_event) int i; if (--tp_event->perf_refcount > 0) - goto out; + return; tp_event->class->reg(tp_event, TRACE_REG_PERF_UNREGISTER, NULL); @@ -176,8 +176,6 @@ static void perf_trace_event_unreg(struct perf_event *p_event) perf_trace_buf[i] = NULL; } } -out: - trace_event_put_ref(tp_event); } static int perf_trace_event_open(struct perf_event *p_event) @@ -241,6 +239,7 @@ void perf_trace_destroy(struct perf_event *p_event) mutex_lock(&event_mutex); perf_trace_event_close(p_event); perf_trace_event_unreg(p_event); + trace_event_put_ref(p_event->tp_event); mutex_unlock(&event_mutex); } @@ -292,6 +291,7 @@ void perf_kprobe_destroy(struct perf_event *p_event) mutex_lock(&event_mutex); perf_trace_event_close(p_event); perf_trace_event_unreg(p_event); + trace_event_put_ref(p_event->tp_event); mutex_unlock(&event_mutex); destroy_local_trace_kprobe(p_event->tp_event); @@ -347,6 +347,7 @@ void perf_uprobe_destroy(struct perf_event *p_event) mutex_lock(&event_mutex); perf_trace_event_close(p_event); perf_trace_event_unreg(p_event); + trace_event_put_ref(p_event->tp_event); mutex_unlock(&event_mutex); destroy_local_trace_uprobe(p_event->tp_event); } |