Author: tsoome
Date: Sat Oct 26 18:29:02 2019
New Revision: 354119
URL: https://svnweb.freebsd.org/changeset/base/354119
Log:
loader: rs_alloc() may return NULL
rs_alloc() in zfs reader code may return NULL, so we need to check the return
value and error out if needed.
MFC after: 1 week
Modified:
head/stand/libsa/zfs/zfsimpl.c
Modified: head/stand/libsa/zfs/zfsimpl.c
==============================================================================
--- head/stand/libsa/zfs/zfsimpl.c Sat Oct 26 18:22:52 2019
(r354118)
+++ head/stand/libsa/zfs/zfsimpl.c Sat Oct 26 18:29:02 2019
(r354119)
@@ -840,12 +840,17 @@ vdev_indirect_remap(vdev_t *vd, uint64_t offset, uint6
list_t stack;
spa_t *spa = vd->spa;
zio_t *zio = arg;
+ remap_segment_t *rs;
list_create(&stack, sizeof (remap_segment_t),
offsetof(remap_segment_t, rs_node));
- for (remap_segment_t *rs = rs_alloc(vd, offset, asize, 0);
- rs != NULL; rs = list_remove_head(&stack)) {
+ rs = rs_alloc(vd, offset, asize, 0);
+ if (rs == NULL) {
+ printf("vdev_indirect_remap: out of memory.\n");
+ zio->io_error = ENOMEM;
+ }
+ for ( ; rs != NULL; rs = list_remove_head(&stack)) {
vdev_t *v = rs->rs_vd;
uint64_t num_entries = 0;
/* vdev_indirect_mapping_t *vim = v->v_mapping; */
@@ -853,6 +858,9 @@ vdev_indirect_remap(vdev_t *vd, uint64_t offset, uint6
vdev_indirect_mapping_duplicate_adjacent_entries(v,
rs->rs_offset, rs->rs_asize, &num_entries);
+ if (num_entries == 0)
+ zio->io_error = ENOMEM;
+
for (uint64_t i = 0; i < num_entries; i++) {
vdev_indirect_mapping_entry_phys_t *m = &mapping[i];
uint64_t size = DVA_GET_ASIZE(&m->vimep_dst);
@@ -865,9 +873,18 @@ vdev_indirect_remap(vdev_t *vd, uint64_t offset, uint6
vdev_t *dst_v = vdev_lookup_top(spa, dst_vdev);
if (dst_v->v_read == vdev_indirect_read) {
- list_insert_head(&stack,
- rs_alloc(dst_v, dst_offset + inner_offset,
- inner_size, rs->rs_split_offset));
+ remap_segment_t *o;
+
+ o = rs_alloc(dst_v, dst_offset + inner_offset,
+ inner_size, rs->rs_split_offset);
+ if (o == NULL) {
+ printf("vdev_indirect_remap: "
+ "out of memory.\n");
+ zio->io_error = ENOMEM;
+ break;
+ }
+
+ list_insert_head(&stack, o);
}
vdev_indirect_gather_splits(rs->rs_split_offset, dst_v,
dst_offset + inner_offset,
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