diff options
| author | Zhou Zhengping <johnzzpcrystal@gmail.com> | 2017-05-09 20:57:34 +0800 |
|---|---|---|
| committer | Raghavendra G <rgowdapp@redhat.com> | 2017-05-12 04:47:44 +0000 |
| commit | 333474e0d6efe1a2b3a9ecffc9bdff3e49325910 (patch) | |
| tree | 176005ae869f739d6e209472d21e87fc7f98d3c0 /xlators/features/locks/src/posix.c | |
| parent | ccfa06767f1282d9a3783e37555515a63cc62e69 (diff) | |
libglusterfs: fix race condition in client_ctx_set
follow procedures:
1.thread1 client_ctx_get return NULL
2.thread 2 client_ctx_set ctx1 ok
3.thread1 client_ctx_set ctx2 ok
thread1 use ctx1, thread2 use ctx2 and ctx1 will leak
Change-Id: I990b02905edd1b3179323ada56888f852d20f538
BUG: 1449232
Signed-off-by: Zhou Zhengping <johnzzpcrystal@gmail.com>
Reviewed-on: https://review.gluster.org/17219
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
Diffstat (limited to 'xlators/features/locks/src/posix.c')
| -rw-r--r-- | xlators/features/locks/src/posix.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c index 44ca5004171..1b691c0a878 100644 --- a/xlators/features/locks/src/posix.c +++ b/xlators/features/locks/src/posix.c @@ -3480,6 +3480,7 @@ pl_ctx_get (client_t *client, xlator_t *xlator) { void *tmp = NULL; pl_ctx_t *ctx = NULL; + pl_ctx_t *setted_ctx = NULL; client_ctx_get (client, xlator, &tmp); @@ -3498,10 +3499,11 @@ pl_ctx_get (client_t *client, xlator_t *xlator) INIT_LIST_HEAD (&ctx->entrylk_lockers); INIT_LIST_HEAD (&ctx->metalk_list); - if (client_ctx_set (client, xlator, ctx) != 0) { + setted_ctx = client_ctx_set (client, xlator, ctx); + if (ctx != setted_ctx) { pthread_mutex_destroy (&ctx->lock); GF_FREE (ctx); - ctx = NULL; + ctx = setted_ctx; } out: return ctx; |