From 0f1d3f938527f319d830ef3082c218c77cfd159f Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Thu, 2 Aug 2012 11:29:44 -0500 Subject: [PATCH] rbd: make snap_names_len a u64 The snap_names_len field of an rbd_image_header structure is defined with type size_t. That field is used as both the source and target of 64-bit byte-order swapping operations though, so it's best to define it with type u64 instead. Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bf418a6afbe0..02de524d4b67 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -81,7 +81,7 @@ struct rbd_image_header { __u8 crypt_type; __u8 comp_type; struct ceph_snap_context *snapc; - size_t snap_names_len; + u64 snap_names_len; u32 total_snaps; char *snap_names; @@ -510,6 +510,7 @@ static int rbd_header_from_disk(struct rbd_image_header *header, if (snap_count) { header->snap_names_len = le64_to_cpu(ondisk->snap_names_len); + BUG_ON(header->snap_names_len > (u64) SIZE_MAX); header->snap_names = kmalloc(header->snap_names_len, GFP_KERNEL); if (!header->snap_names) -- 2.20.1