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author | Jesper Juhl <jj@chaosbits.net> | 2012-02-06 20:07:04 +1100 |
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committer | James Morris <james.l.morris@oracle.com> | 2012-04-18 12:14:28 +1000 |
commit | 09c79b60960bdd4b00916219402eabfa5e479c5a (patch) | |
tree | d8be1892ca81cbd194ac5e8c198f0f939d432257 /sound | |
parent | 86812bb0de1a3758dc6c7aa01a763158a7c0638a (diff) | |
download | op-kernel-dev-09c79b60960bdd4b00916219402eabfa5e479c5a.zip op-kernel-dev-09c79b60960bdd4b00916219402eabfa5e479c5a.tar.gz |
mpi: Avoid using freed pointer in mpi_lshift_limbs()
At the start of the function we assign 'a->d' to 'ap'. Then we use the
RESIZE_IF_NEEDED macro on 'a' - this may free 'a->d' and replace it
with newly allocaetd storage. In that case, we'll be operating on
freed memory further down in the function when we index into 'ap[]'.
Since we don't actually need 'ap' until after the use of the
RESIZE_IF_NEEDED macro we can just delay the assignment to it until
after we've potentially resized, thus avoiding the issue.
While I was there anyway I also changed the integer variable 'n' to be
const. It might as well be since we only assign to it once and use it
as a constant, and then the compiler will tell us if we ever assign to
it in the future.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions