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| author | Phillip Susi <psusi@cfl.rr.com> | 2006-02-04 23:27:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-05 11:06:52 -0800 |
| commit | a460ad62260def15c42130de253d6cfc32528a2f (patch) | |
| tree | 6fd5b90db456ae6a333a224b8c1c975474bb3c27 /drivers/block/pktcdvd.c | |
| parent | bd576c9523fbf23e94fb7dbe05d2ae1cf96864e4 (diff) | |
| download | linux-a460ad62260def15c42130de253d6cfc32528a2f.tar.gz linux-a460ad62260def15c42130de253d6cfc32528a2f.tar.bz2 linux-a460ad62260def15c42130de253d6cfc32528a2f.zip | |
[PATCH] pktcdvd: Fix overflow for discs with large packets
The pktcdvd driver was using an 8 bit field to store the packet length
obtained from the disc track info. This causes it to overflow packet length
values of 128KB or more. I changed the field to 32 bits to fix this.
The pktcdvd driver defaulted to its maximum allowed packet length when it
detected a 0 in the track info field. I changed this to fail the operation
and refuse to access the media. This seems more sane than attempting to
access it with a value that almost certainly will not work.
Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/pktcdvd.c')
| -rw-r--r-- | drivers/block/pktcdvd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 93affeeef7bd..d95e7e1ac355 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -1639,7 +1639,7 @@ static int pkt_probe_settings(struct pktcdvd_device *pd) pd->settings.size = be32_to_cpu(ti.fixed_packet_size) << 2; if (pd->settings.size == 0) { printk("pktcdvd: detected zero packet size!\n"); - pd->settings.size = 128; + return -ENXIO; } if (pd->settings.size > PACKET_MAX_SECTORS) { printk("pktcdvd: packet size is too big\n"); |