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libceph: fix osdmap decode error paths 

Ensure that we set the err value correctly so that we do not pass a 0
value to ERR_PTR and confuse the calling code.  (In particular,
osd_client.c handle_map() will BUG(!newmap)).

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Sage Weil 2012-10-29 11:01:42 -07:00 committed by Alex Elder
parent 069a4b5690
commit 0ed7285e00
1 changed files with 20 additions and 11 deletions
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31
net/ceph/osdmap.c
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@ -645,10 +645,12 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
ceph_decode_32_safe(p, end, max, bad);
while (max--) {
ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad);
err = -ENOMEM;
pi = kzalloc(sizeof(*pi), GFP_NOFS);
if (!pi)
goto bad;
pi->id = ceph_decode_32(p);
err = -EINVAL;
ev = ceph_decode_8(p); /* encoding version */
if (ev > CEPH_PG_POOL_VERSION) {
pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
@ -664,8 +666,13 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
__insert_pg_pool(&map->pg_pools, pi);
}
if (version >= 5 && __decode_pool_names(p, end, map) < 0)
goto bad;
if (version >= 5) {
err = __decode_pool_names(p, end, map);
if (err < 0) {
dout("fail to decode pool names");
goto bad;
}
}
ceph_decode_32_safe(p, end, map->pool_max, bad);
@ -745,7 +752,7 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
return map;
bad:
dout("osdmap_decode fail\n");
dout("osdmap_decode fail err %d\n", err);
ceph_osdmap_destroy(map);
return ERR_PTR(err);
}
@ -839,6 +846,7 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
if (ev > CEPH_PG_POOL_VERSION) {
pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
ev, CEPH_PG_POOL_VERSION);
err = -EINVAL;
goto bad;
}
pi = __lookup_pg_pool(&map->pg_pools, pool);
@ -855,8 +863,11 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
if (err < 0)
goto bad;
}
if (version >= 5 && __decode_pool_names(p, end, map) < 0)
goto bad;
if (version >= 5) {
err = __decode_pool_names(p, end, map);
if (err < 0)
goto bad;
}
/* old_pool */
ceph_decode_32_safe(p, end, len, bad);
@ -932,15 +943,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
(void) __remove_pg_mapping(&map->pg_temp, pgid);
/* insert */
if (pglen > (UINT_MAX - sizeof(*pg)) / sizeof(u32)) {
err = -EINVAL;
err = -EINVAL;
if (pglen > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
goto bad;
}
err = -ENOMEM;
pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
if (!pg) {
err = -ENOMEM;
if (!pg)
goto bad;
}
pg->pgid = pgid;
pg->len = pglen;
for (j = 0; j < pglen; j++)