Author: avg
Date: Wed Nov 20 10:59:41 2013
New Revision: 258377
URL: http://svnweb.freebsd.org/changeset/base/258377
Log:
4088 use after free in arc_release()
illumos/illumos-gate@ccc22e130479b5bd7c0002267fee1e0602d3f772
Modified:
vendor-sys/illumos/dist/uts/common/fs/zfs/arc.c
Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/arc.c
==============================================================================
--- vendor-sys/illumos/dist/uts/common/fs/zfs/arc.c Wed Nov 20 10:58:25
2013 (r258376)
+++ vendor-sys/illumos/dist/uts/common/fs/zfs/arc.c Wed Nov 20 10:59:41
2013 (r258377)
@@ -3332,6 +3332,7 @@ arc_release(arc_buf_t *buf, void *tag)
if (l2hdr) {
mutex_enter(&l2arc_buflist_mtx);
hdr->b_l2hdr = NULL;
+ list_remove(l2hdr->b_dev->l2ad_buflist, hdr);
}
buf_size = hdr->b_size;
@@ -3415,7 +3416,6 @@ arc_release(arc_buf_t *buf, void *tag)
if (l2hdr) {
ARCSTAT_INCR(arcstat_l2_asize, -l2hdr->b_asize);
- list_remove(l2hdr->b_dev->l2ad_buflist, hdr);
kmem_free(l2hdr, sizeof (l2arc_buf_hdr_t));
ARCSTAT_INCR(arcstat_l2_size, -buf_size);
mutex_exit(&l2arc_buflist_mtx);
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