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| author | Pan Bian <bianpan2016@163.com> | 2019-11-04 18:26:22 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-11-06 08:04:02 +0300 |
| commit | ec990306f77fd4c58c3b27cc3b3c53032d6e6670 (patch) | |
| tree | 6c5eb74ef2ba35ae0b7ac61b4f267b1b80396e23 /drivers/scsi/fnic/fnic_scsi.c | |
| parent | b1335f5b0486f61fb66b123b40f8e7a98e49605d (diff) | |
| download | linux-ec990306f77fd4c58c3b27cc3b3c53032d6e6670.tar.xz | |
scsi: fnic: fix use after free
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>
Diffstat (limited to 'drivers/scsi/fnic/fnic_scsi.c')
| -rw-r--r-- | drivers/scsi/fnic/fnic_scsi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c index 80608b53897b..8ef150dfb6f7 100644 --- a/drivers/scsi/fnic/fnic_scsi.c +++ b/drivers/scsi/fnic/fnic_scsi.c @@ -1024,7 +1024,8 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic, atomic64_inc(&fnic_stats->io_stats.io_completions); - io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time); + io_duration_time = jiffies_to_msecs(jiffies) - + jiffies_to_msecs(start_time); if(io_duration_time <= 10) atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec); |