[PATCH] packet writing oops fix

There is an old bug in the pkt_count_states() function that causes stack
corruption.  When compiling with gcc 3.x or 2.x it is harmless, but gcc 4
allocates local variables differently, which makes the bug visible.

Signed-off-by: Peter Osterlund <petero2@telia.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 59e5982..c0233ef 100644 (file)
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1188,7 +1188,7 @@ static void pkt_count_states(struct pktcdvd_device *pd, int *states)
        struct packet_data *pkt;
        int i;
 
-       for (i = 0; i <= PACKET_NUM_STATES; i++)
+       for (i = 0; i < PACKET_NUM_STATES; i++)
                states[i] = 0;
 
        spin_lock(&pd->cdrw.active_list_lock);