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| author | Ulrich Drepper <drepper@redhat.com> | 2009-07-02 03:30:55 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-07-02 03:30:55 -0700 |
| commit | 6cbbaa50aac809ad6e0692247876c82d58e466bf (patch) | |
| tree | caf0a957162147dc92d24933de3b61f6cf40c838 | |
| parent | 2fd0cd8b5257e7ae0c0df0651ee62a6ef7c37cc2 (diff) | |
| download | glibc-6cbbaa50aac809ad6e0692247876c82d58e466bf.tar.gz glibc-6cbbaa50aac809ad6e0692247876c82d58e466bf.tar.xz glibc-6cbbaa50aac809ad6e0692247876c82d58e466bf.zip | |
Fix possible race when freeing object in fast bin list.
| -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 0c6c36f472..4700e7d7b3 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 516d401991..70e4e58845 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -4822,6 +4822,7 @@ _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 |