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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-19 10:31:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-19 10:31:36 -0700 |
| commit | 598a0c7d0932e385486b173768f03d95bf5507c8 (patch) | |
| tree | d528410bffc0297c205b55dbb2b4a012243089d7 /arch/x86/kernel | |
| parent | 7a5e87867e9fe043c3067a864124caf2b8e7fb99 (diff) | |
| parent | 3577af70a2ce4853d58e57d832e687d739281479 (diff) | |
| download | linux-598a0c7d0932e385486b173768f03d95bf5507c8.tar.bz2 | |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Two kernel side fixes: a kprobes fix and a perf_remove_from_context()
fix (which does not yet fix the migration bug which is WIP)"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Fix a race condition in perf_remove_from_context()
kprobes/x86: Free 'optinsn' cache when range check fails
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/kprobes/opt.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c index f304773285ae..f1314d0bcf0a 100644 --- a/arch/x86/kernel/kprobes/opt.c +++ b/arch/x86/kernel/kprobes/opt.c @@ -338,8 +338,10 @@ int arch_prepare_optimized_kprobe(struct optimized_kprobe *op) * a relative jump. */ rel = (long)op->optinsn.insn - (long)op->kp.addr + RELATIVEJUMP_SIZE; - if (abs(rel) > 0x7fffffff) + if (abs(rel) > 0x7fffffff) { + __arch_remove_optimized_kprobe(op, 0); return -ERANGE; + } buf = (u8 *)op->optinsn.insn; |