diff options
| author | Kyle McMartin <kyle@redhat.com> | 2009-08-19 21:17:08 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-21 10:04:24 +0200 |
| commit | ec9c96ef3cc0124cb94375b17faaa8cff5dfdf97 (patch) | |
| tree | 477cfb87ab455a9adf26cb897252290f110494dd /lib/show_mem.c | |
| parent | 429966b8f644dda2afddb4f834a944e9b46a7645 (diff) | |
dma-debug: Fix check_unmap null pointer dereference
While it's debatable whether or not a NULL device argument to
the DMA API functions is valid... since it certainly isn't
valid on devices with an IOMMU... dma-debug really shouldn't be
dereferencing null pointers either.
Guard against that in err_printk and the driver_filter
functions. A Fedora rawhide user was seeing this in one of the
dvb drivers resulting in an oops on boot.
[ A patch has been sent for testing to the driver, but I feel
the dma debugging support should be fixed as well. (There's
still a pile of legacy garbage in the kernel passing null
pointers to dma_{alloc,free}_*. :( ]
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Cc: mchehab@infradead.org
Cc: Joerg Roedel <joerg.roedel@amd.com>
LKML-Reference: <20090820011708.GP25206@bombadil.infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib/show_mem.c')
0 files changed, 0 insertions, 0 deletions