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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> | 2014-03-11 16:10:02 -0700 |
| commit | 8d8e4839b5457e20e371a5f7485ce7855c7870c9 (patch) | |
| tree | 1b0cd1be6d9ed1a338f327df121f28c414435e46 /mm/vmscan.c | |
| parent | 54499e71eccdeab9295af9150e3ffb99223447a8 (diff) | |
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 'mm/vmscan.c')
0 files changed, 0 insertions, 0 deletions