Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in folio_evictable (3)

[Edward Adam Davis]

#syz test

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 042329b74c6e..3dcef4bb0427 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -222,6 +222,7 @@ static int scsi_realloc_sdev_budget_map(struct scsi_device *sdev,
 	bool need_free = false;
 	int ret;
 	struct sbitmap sb_backup;
+	unsigned int flags;
 
 	depth = min_t(unsigned int, depth, scsi_device_max_queue_depth(sdev));
 
@@ -243,10 +244,12 @@ static int scsi_realloc_sdev_budget_map(struct scsi_device *sdev,
 		blk_mq_freeze_queue(sdev->request_queue);
 		sb_backup = sdev->budget_map;
 	}
+	flags = memalloc_nofs_save();
 	ret = sbitmap_init_node(&sdev->budget_map,
 				scsi_device_max_queue_depth(sdev),
 				new_shift, GFP_KERNEL,
 				sdev->request_queue->node, false, true);
+	memalloc_nofs_restore(flags);
 	if (!ret)
 		sbitmap_resize(&sdev->budget_map, depth);
 
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index e83d293c3614..573f62ccd01e 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -839,6 +839,8 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
 	    gfs2_holder_initialized(&sdp->sd_jinode_gh))
 		gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
 fail_journal_gh:
+	if (ip)
+		cancel_delayed_work(&ip->i_gl->gl_work);
 	if (!sdp->sd_args.ar_spectator &&
 	    gfs2_holder_initialized(&sdp->sd_journal_gh))
 		gfs2_glock_dq_uninit(&sdp->sd_journal_gh);