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libceph: NULL deref on osdmap_apply_incremental() error path

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There are hidden gotos in the ceph_decode_* macros.  We need to set the
"err" variable on these error paths otherwise we end up returning
ERR_PTR(0) which is NULL.  It causes NULL dereferences in the callers.

Fixes: 6f428df47dae ("libceph: pg_upmap[_items] infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[idryomov@gmail.com: similar bug in osdmap_decode(), changelog tweak]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Dan Carpenter 2017-07-13 10:45:17 +03:00 committed by Ilya Dryomov
parent e67ae2b7b2
commit 00c8ebb360
1 changed files with 3 additions and 3 deletions
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6
net/ceph/osdmap.c
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@ -1544,7 +1544,7 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
if (struct_v >= 3) {
/* erasure_code_profiles */
ceph_decode_skip_map_of_map(p, end, string, string, string,
bad);
e_inval);
}
if (struct_v >= 4) {
@ -1825,9 +1825,9 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
if (struct_v >= 3) {
/* new_erasure_code_profiles */
ceph_decode_skip_map_of_map(p, end, string, string, string,
bad);
e_inval);
/* old_erasure_code_profiles */
ceph_decode_skip_set(p, end, string, bad);
ceph_decode_skip_set(p, end, string, e_inval);
}
if (struct_v >= 4) {