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);