Peter Zijlstra bee870fc1a perf: fix perf bug in fork() ...

commit 6c72e3501d upstream.

Oleg noticed that a cleanup by Sylvain actually uncovered a bug; by
calling perf_event_free_task() when failing sched_fork() we will not yet
have done the memset() on ->perf_event_ctxp[] and will therefore try and
'free' the inherited contexts, which are still in use by the parent
process.  This is bad..

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Sylvain 'ythier' Hitier <sylvain.hitier@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-10-09 12:18:42 -07:00

..

callchain.c

perf: Add attribute to filter out callchains

2012-08-10 12:40:57 -03:00

core.c

perf: fix perf bug in fork()

2014-10-09 12:18:42 -07:00

hw_breakpoint.c

hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot()

2013-06-20 17:57:01 +02:00

internal.h

perf: Fix mmap() accounting hole

2013-06-19 12:44:13 +02:00

Makefile

uprobes: Move to kernel/events/

2012-02-22 11:08:00 +01:00

ring_buffer.c

perf: Fix perf ring buffer memory ordering

2013-11-20 12:27:47 -08:00

uprobes.c

uprobes: Fix utask->depth accounting in handle_trampoline()

2013-09-26 17:18:27 -07:00