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| author | Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com> | 2022-03-11 21:22:05 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-29 23:07:56 -0400 |
| commit | a6968f7a367f128d120447360734344d5a3d5336 (patch) | |
| tree | 2afc4fb879689dc8aca4a9a74908a1d661c553f6 /tools/perf/scripts/python/check-perf-trace.py | |
| parent | ebfe3e0c5e805da3dd692bb120cd6269b7c19b80 (diff) | |
scsi: target: tcmu: Fix possible page UAF
tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not
take refcount properly and just returns page pointer. When
tcmu_try_get_data_page() returns, the returned page may have been freed by
tcmu_blocks_release().
We need to get_page() under cmdr_lock to avoid concurrent
tcmu_blocks_release().
Link: https://lore.kernel.org/r/20220311132206.24515-1-xiaoguang.wang@linux.alibaba.com
Reviewed-by: Bodo Stroesser <bostroesser@gmail.com>
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions