scsi: fnic: fix use after free
[ Upstream commit ec990306f7
]
The memory chunk io_req is released by mempool_free. Accessing
io_req->start_time will result in a use after free bug. The variable
start_time is a backup of the timestamp. So, use start_time here to
avoid use after free.
Link: https://lore.kernel.org/r/1572881182-37664-1-git-send-email-bianpan2016@163.com
Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1027,7 +1027,8 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
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atomic64_inc(&fnic_stats->io_stats.io_completions);
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io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
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io_duration_time = jiffies_to_msecs(jiffies) -
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jiffies_to_msecs(start_time);
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if(io_duration_time <= 10)
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atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
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