This is a note to let you know that I've just added the patch titled
scsi: mpi3mr: Fix missing mrioc->evtack_cmds initialization
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-mpi3mr-fix-missing-mrioc-evtack_cmds-initialization.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e39ea831ebad4ab15c4748cb62a397a8abcca36e Mon Sep 17 00:00:00 2001
From: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
Date: Tue, 14 Feb 2023 09:50:19 +0900
Subject: scsi: mpi3mr: Fix missing mrioc->evtack_cmds initialization
From: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
commit e39ea831ebad4ab15c4748cb62a397a8abcca36e upstream.
Commit c1af985d27da ("scsi: mpi3mr: Add Event acknowledgment logic")
introduced an array mrioc->evtack_cmds but initialization of the array
elements was missed. They are just zero cleared. The function
mpi3mr_complete_evt_ack() refers host_tag field of the elements. Due to the
zero value of the host_tag field, the function calls clear_bit() for
mrico->evtack_cmds_bitmap with wrong bit index. This results in memory
access to invalid address and "BUG: KASAN: use-after-free". This BUG was
observed at eHBA-9600 firmware update to version 8.3.1.0. To fix it, add
the missing initialization of mrioc->evtack_cmds.
Link: https://lore.kernel.org/r/20230214005019.1897251-5-shinichiro.kawasaki@xxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Fixes: c1af985d27da ("scsi: mpi3mr: Add Event acknowledgment logic")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Acked-by: Sathya Prakash Veerichetty <sathya.prakash@xxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/mpi3mr/mpi3mr_os.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -4952,6 +4952,10 @@ mpi3mr_probe(struct pci_dev *pdev, const
mpi3mr_init_drv_cmd(&mrioc->dev_rmhs_cmds[i],
MPI3MR_HOSTTAG_DEVRMCMD_MIN + i);
+ for (i = 0; i < MPI3MR_NUM_EVTACKCMD; i++)
+ mpi3mr_init_drv_cmd(&mrioc->evtack_cmds[i],
+ MPI3MR_HOSTTAG_EVTACKCMD_MIN + i);
+
if (pdev->revision)
mrioc->enable_segqueue = true;
Patches currently in stable-queue which might be from shinichiro.kawasaki@xxxxxxx are
queue-6.1/scsi-mpi3mr-fix-issues-in-mpi3mr_get_all_tgt_info.patch
queue-6.1/scsi-mpi3mr-remove-unnecessary-memcpy-to-alltgt_info-dmi.patch
queue-6.1/scsi-mpi3mr-fix-missing-mrioc-evtack_cmds-initialization.patch
