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| author | Kyle McMartin <[email protected]> | 2009-08-20 01:17:08 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2009-08-21 08:04:24 +0000 |
| commit | ec9c96ef3cc0124cb94375b17faaa8cff5dfdf97 (patch) | |
| tree | 477cfb87ab455a9adf26cb897252290f110494dd /lib/flex_array.c | |
| parent | Merge branch 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux (diff) | |
| download | kernel-ec9c96ef3cc0124cb94375b17faaa8cff5dfdf97.tar.gz kernel-ec9c96ef3cc0124cb94375b17faaa8cff5dfdf97.zip | |
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 <[email protected]>
Cc: [email protected]
Cc: Joerg Roedel <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'lib/flex_array.c')
0 files changed, 0 insertions, 0 deletions