+++ This bug was initially created as a clone of Bug #457025 +++ Description of problem: cdrom_read_capacity() will blindly return the capacity from the device without sanity-checking it. This later causes code in fs/buffer.c to oops. Fix this by checking that the device is telling us sensible things. -- Additional comment from eteo on 2008-07-29 06:07 EST -- Proposed upstream patch: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e8e7b9eb11c34ee18bde8b7011af41938d1ad667 -- Additional comment from eteo on 2008-07-29 06:10 EST -- With reference to http://lkml.org/lkml/2008/6/22/90, problem was triggered by running "genisoimage -C 16,737776 -M /dev/fd/3 -R -J foobar | builtin_dd of=/dev/dvd obs=32k seek=46111" on a ppc64 machine.
There's a follow-up patch that fixes a bug in commit e8e7b9eb11c34ee18bde8b7011af41938d1ad667. Please include commit 938bb03d188a1e688fb0bcae49788f540193e80a in your backported patch. Thanks.