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| author | Suganath Prabu S <suganath-prabu.subramani@broadcom.com> | 2020-05-28 10:56:17 -0400 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-06-02 21:39:31 -0400 |
| commit | 61e6ba03ea26f0205e535862009ff6ffdbf4de0c (patch) | |
| tree | 9ed277da9d9d794656316074b926d3d482585c5f /tools/perf/scripts/python/syscall-counts.py | |
| parent | 0267ffce562c8bbf9b57ebe0e38445ad04972890 (diff) | |
scsi: mpt3sas: Fix memset() in non-RDPQ mode
Fix memset() accessing out of range address when reply_queue count is less
than RDPQ_MAX_INDEX_IN_ONE_CHUNK (i.e. 16) in non-RDPQ mode.
In non-RDPQ mode, the driver allocates a single contiguous pool of size
reply_queue's count * reqly_post_free_sz. But the driver is always
memsetting this pool with size 16 * reqly_post_free_sz. If reply queue
count is less than 16 (i.e. when MSI-X vectors enabled < 16), the driver is
accessing out of range address and this results in 'BUG: unable to handle
kernel paging request at fff0x...x' bug.
Make driver use dma_pool_zalloc() API to allocate and zero the pool.
Link: https://lore.kernel.org/r/20200528145617.27252-1-suganath-prabu.subramani@broadcom.com
Fixes: 8012209eb26b ("scsi: mpt3sas: Handle RDPQ DMA allocation in same 4G region")
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions