From d0272e78eee4dc53c887fd132e9035daf037d423 Mon Sep 17 00:00:00 2001 From: Peter Osterlund Date: Tue, 13 Sep 2005 01:25:27 -0700 Subject: [PATCH] [PATCH] pktcdvd: fix bogus BUG_ON In the packet writing driver, if the drive reports a packet size larger than the driver can handle, bail out safely instead of triggering a BUG_ON. Signed-off-by: Peter Osterlund Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/pktcdvd.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 7b838342f0a3..58d01c820799 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -946,7 +946,6 @@ try_next_bio: pd->current_sector = zone + pd->settings.size; pkt->sector = zone; pkt->frames = pd->settings.size >> 2; - BUG_ON(pkt->frames > PACKET_MAX_SIZE); pkt->write_size = 0; /* @@ -1636,6 +1635,10 @@ static int pkt_probe_settings(struct pktcdvd_device *pd) printk("pktcdvd: detected zero packet size!\n"); pd->settings.size = 128; } + if (pd->settings.size > PACKET_MAX_SECTORS) { + printk("pktcdvd: packet size is too big\n"); + return -ENXIO; + } pd->settings.fp = ti.fp; pd->offset = (be32_to_cpu(ti.track_start) << 2) & (pd->settings.size - 1);