Peter Zijlstra 828b6f0e26 perf: Fix NULL deref ... Dan reported: 1229 if (ctx->task == TASK_TOMBSTONE || 1230 !atomic_inc_not_zero(&ctx->refcount)) { 1231 raw_spin_unlock(&ctx->lock); 1232 ctx = NULL; ^^^^^^^^^^ ctx is NULL. 1233 } 1234 1235 WARN_ON_ONCE(ctx->task != task); ^^^^^^^^^^^^^^^^^ The patch adds a NULL dereference. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> 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: Vince Weaver <vincent.weaver@maine.edu> Fixes: 63b6da39bb ("perf: Fix perf_event_exit_task() race") Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-01-29 08:35:24 +01:00
..
callchain.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
core.c	perf: Fix NULL deref	2016-01-29 08:35:24 +01:00
hw_breakpoint.c	perf: Collapse and fix event_function_call() users	2016-01-21 18:54:24 +01:00
internal.h	perf: Fix AUX buffer refcounting	2015-07-06 14:08:30 +02:00
Makefile	ftrace: allow architectures to specify ftrace compile options	2015-01-29 09:19:19 +01:00
ring_buffer.c	perf: Synchronously free aux pages in case of allocation failure	2016-01-21 18:54:27 +01:00
uprobes.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00