This is a note to let you know that I've just added the patch titled
scsi: qla2xxx: Fix crash during module load unload test
to the 5.15-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-qla2xxx-fix-crash-during-module-load-unload-tes.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5486a36c77b7c513bc8e7ee7f5efb2f25bbec26a
Author: Arun Easi <aeasi@xxxxxxxxxxx>
Date: Thu Mar 10 01:25:56 2022 -0800
scsi: qla2xxx: Fix crash during module load unload test
[ Upstream commit 0972252450f90db56dd5415a20e2aec21a08d036 ]
During purex packet handling the driver was incorrectly freeing a
pre-allocated structure. Fix this by skipping that entry.
System crashed with the following stack during a module unload test.
Call Trace:
sbitmap_init_node+0x7f/0x1e0
sbitmap_queue_init_node+0x24/0x150
blk_mq_init_bitmaps+0x3d/0xa0
blk_mq_init_tags+0x68/0x90
blk_mq_alloc_map_and_rqs+0x44/0x120
blk_mq_alloc_set_map_and_rqs+0x63/0x150
blk_mq_alloc_tag_set+0x11b/0x230
scsi_add_host_with_dma.cold+0x3f/0x245
qla2x00_probe_one+0xd5a/0x1b80 [qla2xxx]
Call Trace with slub_debug and debug kernel:
kasan_report_invalid_free+0x50/0x80
__kasan_slab_free+0x137/0x150
slab_free_freelist_hook+0xc6/0x190
kfree+0xe8/0x2e0
qla2x00_free_device+0x3bb/0x5d0 [qla2xxx]
qla2x00_remove_one+0x668/0xcf0 [qla2xxx]
Link: https://lore.kernel.org/r/20220310092604.22950-6-njavali@xxxxxxxxxxx
Fixes: 62e9dd177732 ("scsi: qla2xxx: Change in PUREX to handle FPIN ELS requests")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Marco Patalano <mpatalan@xxxxxxxxxx>
Tested-by: Marco Patalano <mpatalan@xxxxxxxxxx>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Arun Easi <aeasi@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index c7ab8a8be24c..e683b1c01c9f 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3892,6 +3892,8 @@ qla24xx_free_purex_list(struct purex_list *list)
spin_lock_irqsave(&list->lock, flags);
list_for_each_entry_safe(item, next, &list->head, list) {
list_del(&item->list);
+ if (item == &item->vha->default_item)
+ continue;
kfree(item);
}
spin_unlock_irqrestore(&list->lock, flags);
