diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2019-02-21 14:19:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-23 08:44:34 +0100 |
| commit | aa9c7ee2922a557ff430651f2125c2eb28821db6 (patch) | |
| tree | c173ba17dd109fc7e9290f552bac165f8fb0bc26 /kernel/trace/trace.c | |
| parent | 5f4c9964d10710659d6cd6b58134b3aba600dffc (diff) | |
stm class: Prevent division by zero
commit bf7cbaae0831252b416f375ca9b1027ecd4642dd upstream.
Using STP_POLICY_ID_SET ioctl command with dummy_stm device, or any STM
device that supplies zero mmio channel size, will trigger a division by
zero bug in the kernel.
Prevent this by disallowing channel widths other than 1 for such devices.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for System Trace Module devices")
CC: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace/trace.c')
0 files changed, 0 insertions, 0 deletions