diff options
| author | Fam Zheng <famz@redhat.com> | 2013-12-13 15:25:12 +0800 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-12-13 17:11:19 +0100 |
| commit | c547e5640d5b0993cdfb252331065c1a1d813bd8 (patch) | |
| tree | 64996a43a78fa7ee499489e84727872e740c21f3 | |
| parent | 802c3d4ccc9853ee11c742bc206f284f04259426 (diff) | |
blkdebug: Use QLIST_FOREACH_SAFE to resume IO
Qemu-iotest 030 was broken.
When the coroutine runs and finishes, it will remove itself from the req
list, so let's use safe version of foreach to avoid use after free.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/blkdebug.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blkdebug.c b/block/blkdebug.c index 37cf028545..957be2c76b 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -594,9 +594,9 @@ static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event, static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag) { BDRVBlkdebugState *s = bs->opaque; - BlkdebugSuspendedReq *r; + BlkdebugSuspendedReq *r, *next; - QLIST_FOREACH(r, &s->suspended_reqs, next) { + QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, next) { if (!strcmp(r->tag, tag)) { qemu_coroutine_enter(r->co, NULL); return 0; @@ -609,7 +609,7 @@ static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, const char *tag) { BDRVBlkdebugState *s = bs->opaque; - BlkdebugSuspendedReq *r; + BlkdebugSuspendedReq *r, *r_next; BlkdebugRule *rule, *next; int i, ret = -ENOENT; @@ -622,7 +622,7 @@ static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs, } } } - QLIST_FOREACH(r, &s->suspended_reqs, next) { + QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, r_next) { if (!strcmp(r->tag, tag)) { qemu_coroutine_enter(r->co, NULL); ret = 0; |