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scsi: smartpqi: Validate block layer host tag

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Prevent OS crashes when a drive is hot removed during I/O stress test.

The I/O request pointer can be invalid if block layer provides incorrect
multi-queue host tag. This can lead to invalid I/O request pointer
dereference.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Murthy Bhat <Murthy.Bhat@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Link: https://lore.kernel.org/r/20230428153712.297638-7-don.brace@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Murthy Bhat 2023-04-28 10:37:06 -05:00 committed by Martin K. Petersen
parent 80d560d94f
commit 5c9e3c1c52
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/smartpqi/smartpqi_init.c
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@ -708,7 +708,8 @@ static inline struct pqi_io_request *pqi_alloc_io_request(struct pqi_ctrl_info *
}
}
pqi_reinit_io_request(io_request);
if (io_request)
pqi_reinit_io_request(io_request);
return io_request;
}