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| author | Maxim Kuvyrkov <maxim@kugelworks.com> | 2013-12-24 09:44:50 +1300 |
|---|---|---|
| committer | Maxim Kuvyrkov <maxim@kugelworks.com> | 2014-01-05 14:58:57 +1300 |
| commit | 3db0119ef56decc402827d5b84774fa4487f6cd4 (patch) | |
| tree | 3b6095bfdf6353360a8f4f7a1be02d6b2d78f8ed /scripts/check-execstack.awk | |
| parent | 15256e58adc62d8d62c03b2b3ba526b468758702 (diff) | |
| download | glibc-3db0119ef56decc402827d5b84774fa4487f6cd4.tar.xz glibc-3db0119ef56decc402827d5b84774fa4487f6cd4.zip | |
Fix race in free() of fastbin chunk: BZ #15073
Perform sanity check only if we have_lock. Due to lockless nature of fastbins
we need to be careful derefencing pointers to fastbin entries (chunksize(old)
in this case) in multithreaded environments.
The fix is to add have_lock to the if-condition checks. The rest of the patch
only makes code more readable.
* malloc/malloc.c (_int_free): Perform sanity check only if we
have_lock.
Conflicts:
ChangeLog
NEWS
Diffstat (limited to 'scripts/check-execstack.awk')
0 files changed, 0 insertions, 0 deletions