diff options
| author | Sujit Reddy Thumma <sthumma@codeaurora.org> | 2014-12-09 20:40:16 +0200 |
|---|---|---|
| committer | Subhash Jadavani <subhashj@codeaurora.org> | 2016-05-31 15:25:59 -0700 |
| commit | 248d1fcebed5f136804f86cff4501ed0461e84ee (patch) | |
| tree | 9f35b618d551e32e3d2f92ab3e34254cc2c49811 /tools/perf/scripts/python/check-perf-trace.py | |
| parent | c250bf69fda3120c4b47e41aa61cbad349b7df7a (diff) | |
mmc: core: Fix null pointer dereference due to race conditions
Fix race condition between mmcqd thread and the mmc_queue_suspend
updating a shared variable mq->flags, which can lead to potential
null pointer dereference as following-
Unable to handle kernel NULL pointer dereference at
virtual address 00000020
pgd = c0004000
[00000020] *pgd=00000000
mmcqd/0: 186] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
CPU: 0 Tainted: G W (3.4.0-1251694-eng #1)
PC is at mmc_blk_err_check+0x20c/0x3b8
LR is at mmc_start_req+0x198/0x718
cpu0 | cpu1
x |= 1 | x |= 2
final value of x can be x = 1 or x = 2
Change-Id: Ie0fff6d6dba5aebb3584cba9fb98de24515c4cd8
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
[merez@codeaurora.org: fix conflicts due to missing stop transmission
and changes in new request implementation in 3.14]
Signed-off-by: Maya Erez <merez@codeaurora.org>
[venkatg@codeaurora.org: Fix conflicts due to changes in 3.14 kernel]
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
[subhashj@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions