From: Julia Lawall julia@diku.dk
sizeof(share_id) is just the size of the pointer. On the other hand, block->share_id is an array, so its size seems more appropriate.
A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @@ expression *x; expression f; type T; @@
*f(...,(T)x,...) // </smpl>
Signed-off-by: Julia Lawall julia@diku.dk
--- sound/isa/gus/gus_mem.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/sound/isa/gus/gus_mem.c b/sound/isa/gus/gus_mem.c index 661205c..af888a0 100644 --- a/sound/isa/gus/gus_mem.c +++ b/sound/isa/gus/gus_mem.c @@ -127,7 +127,8 @@ static struct snd_gf1_mem_block *snd_gf1_mem_share(struct snd_gf1_mem * alloc, !share_id[2] && !share_id[3]) return NULL; for (block = alloc->first; block; block = block->next) - if (!memcmp(share_id, block->share_id, sizeof(share_id))) + if (!memcmp(share_id, block->share_id, + sizeof(block->share_id))) return block; return NULL; }