AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-29 23:46:41 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

[SCSI] fix for bidi use after free

Browse Source 
When ending a bi-directionional SCSI request, blk_finish_request()
cleans up and frees the request, but scsi_release_bidi_buffers() tries
to indirect through the request to find it's data buffers.  This causes
a panic due to a null pointer dereference.

Move the call to scsi_release_bidi_buffers() before the call to
blk_finish_request().

Signed-off-by: Daniel Gryniewicz <dang@linuxbox.com>
Reviewed-by: Webb Scales <webbnh@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Daniel Gryniewicz 2014-09-16 10:41:13 -04:00 committed by James Bottomley
parent e8be1cf58d
commit f81426a84b
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/scsi_lib.c
View File

@ -733,12 +733,13 @@ static bool scsi_end_request(struct request *req, int error,
} else {
unsigned long flags;
if (bidi_bytes)
scsi_release_bidi_buffers(cmd);
spin_lock_irqsave(q->queue_lock, flags);
blk_finish_request(req, error);
spin_unlock_irqrestore(q->queue_lock, flags);
if (bidi_bytes)
scsi_release_bidi_buffers(cmd);
scsi_release_buffers(cmd);
scsi_next_command(cmd);
}