From 53bbaba9d811f75acc20038bfd707a4cfdc4571f Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 13 Mar 2014 16:36:16 +0200 Subject: [PATCH] libceph: fix and clarify ceph_decode_need() sizes Sum up sizeof(...) results instead of (incorrectly) hard-coding the number of bytes, expressed in ints and longs. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- net/ceph/osdmap.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index 07fa3697ea12..11649101a4a8 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -706,7 +706,9 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map) goto e_inval; } - ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), e_inval); + /* fsid, epoch, created, modified */ + ceph_decode_need(p, end, sizeof(map->fsid) + sizeof(u32) + + sizeof(map->created) + sizeof(map->modified), e_inval); ceph_decode_copy(p, &map->fsid, sizeof(map->fsid)); epoch = map->epoch = ceph_decode_32(p); ceph_decode_copy(p, &map->created, sizeof(map->created)); @@ -878,8 +880,9 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, goto e_inval; } - ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32), - e_inval); + /* fsid, epoch, modified, new_pool_max, new_flags */ + ceph_decode_need(p, end, sizeof(fsid) + sizeof(u32) + sizeof(modified) + + sizeof(u64) + sizeof(u32), e_inval); ceph_decode_copy(p, &fsid, sizeof(fsid)); epoch = ceph_decode_32(p); BUG_ON(epoch != map->epoch+1); @@ -913,10 +916,8 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, if (new_pool_max >= 0) map->pool_max = new_pool_max; - ceph_decode_need(p, end, 5*sizeof(u32), e_inval); - /* new max? */ - max = ceph_decode_32(p); + ceph_decode_32_safe(p, end, max, e_inval); if (max >= 0) { err = osdmap_set_max_osd(map, max); if (err) -- 2.20.1