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| author | Linus Walleij <linus.walleij@linaro.org> | 2014-02-13 10:39:01 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-06 22:06:29 -0800 |
| commit | aa9d53380e63a462329b54bfb00c9f9d5288cf46 (patch) | |
| tree | 0c56944c494641fa33107d7fd86bb9d0475f54b0 /Documentation/module-signing.txt | |
| parent | e5b0fd691249908917e96659c03f2bc5869ed249 (diff) | |
| download | lwn-aa9d53380e63a462329b54bfb00c9f9d5288cf46.tar.gz lwn-aa9d53380e63a462329b54bfb00c9f9d5288cf46.zip | |
dma: ste_dma40: don't dereference free:d descriptor
commit e9baa9d9d520fb0e24cca671e430689de2d4a4b2 upstream.
It appears that in the DMA40 driver the DMA tasklet will very
often dereference memory for a descriptor just free:d from the
DMA40 slab. Nothing happens because no other part of the driver
has yet had a chance to claim this memory, but it's really
nasty to dereference free:d memory, so let's check the flag
before the descriptor is free and store it in a bool variable.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/module-signing.txt')
0 files changed, 0 insertions, 0 deletions