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| author | Ulrich Drepper <drepper@redhat.com> | 2009-07-02 03:30:55 -0700 |
|---|---|---|
| committer | Petr Baudis <pasky@suse.cz> | 2009-07-16 17:44:48 +0200 |
| commit | 51da0dcf515bd63d44dd4c479147810b4f30a7f5 (patch) | |
| tree | 5938d77903752465da2a241d02fc3fe822288ab2 | |
| parent | 870a58b0b6a05589a56ea3dc7ee7b59ed64dee50 (diff) | |
| download | glibc-51da0dcf515bd63d44dd4c479147810b4f30a7f5.tar.gz glibc-51da0dcf515bd63d44dd4c479147810b4f30a7f5.tar.xz glibc-51da0dcf515bd63d44dd4c479147810b4f30a7f5.zip | |
Fix possible race when freeing object in fast bin list.
(cherry picked from commit 6cbbaa50aac809ad6e0692247876c82d58e466bf)
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | malloc/malloc.c | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 44c96e0ee8..fba7a5bbfd 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2009-07-02 Ulrich Drepper <drepper@redhat.com> + + * malloc/malloc.c [ATOMIC_FASTBINS] (_int_free): Add full barrier when + adding to fast bin list. + 2009-07-01 Ulrich Drepper <drepper@redhat.com> * nis/nss_nis/nis-network.c (_nss_nis_getnetbyaddr_r): Don't use diff --git a/malloc/malloc.c b/malloc/malloc.c index 0b9facefd4..703dcb56e7 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -4802,6 +4802,7 @@ _int_free(mstate av, mchunkptr p) goto errout; } p->fd = fd = old; + atomic_full_barrier (); } while ((old = catomic_compare_and_exchange_val_acq (fb, p, fd)) != fd); #else |