======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Not tainted
------------------------------------------------------
kswapd0/113 is trying to acquire lock:
but task is already holding lock:
ffffffff8e350a20 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0xcd9/0x18f0 mm/vmscan.c:6990
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (fs_reclaim){+.+.}-{0:0}:
might_alloc include/linux/sched/mm.h:318 [inline]
slab_pre_alloc_hook mm/slub.c:4070 [inline]
slab_alloc_node mm/slub.c:4148 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_node_noprof+0xb7/0x510 mm/slub.c:4304
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:650
sbitmap_init_node+0x1ca/0x770 lib/sbitmap.c:132
scsi_realloc_sdev_budget_map+0x2c7/0x610 drivers/scsi/scsi_scan.c:246
scsi_probe_and_add_lun+0x4fa/0xda0 drivers/scsi/scsi_scan.c:1287
__scsi_add_device+0x24b/0x290 drivers/scsi/scsi_scan.c:1622
ata_scsi_scan_host+0x215/0x780 drivers/ata/libata-scsi.c:4575
async_run_entry_fn+0x9c/0x530 kernel/async.c:129
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (&q->q_usage_counter(io)#68){++++}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090
__submit_bio+0x384/0x540 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739
submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868
swap_writepage_bdev_async mm/page_io.c:451 [inline]
__swap_writepage+0x3a3/0xf50 mm/page_io.c:474
swap_writepage+0x403/0x1120 mm/page_io.c:289
pageout+0x3b2/0xaa0 mm/vmscan.c:689
shrink_folio_list+0x3025/0x42d0 mm/vmscan.c:1367
evict_folios+0x6e3/0x19c0 mm/vmscan.c:4593
try_to_shrink_lruvec+0x61e/0xa80 mm/vmscan.c:4789
shrink_one+0x3e3/0x7b0 mm/vmscan.c:4834
shrink_many mm/vmscan.c:4897 [inline]
lru_gen_shrink_node mm/vmscan.c:4975 [inline]
shrink_node+0x2763/0x3e60 mm/vmscan.c:5956
kswapd_shrink_node mm/vmscan.c:6785 [inline]
balance_pgdat+0xc1f/0x18f0 mm/vmscan.c:6977
kswapd+0x605/0xc00 mm/vmscan.c:7246
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(fs_reclaim);
lock(&q->q_usage_counter(io)#68);
lock(fs_reclaim);
rlock(&q->q_usage_counter(io)#68);
*** DEADLOCK ***
1 lock held by kswapd0/113:
#0: ffffffff8e350a20 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0xcd9/0x18f0 mm/vmscan.c:6990
stack backtrace:
CPU: 0 UID: 0 PID: 113 Comm: kswapd0 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090
__submit_bio+0x384/0x540 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739
submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868
swap_writepage_bdev_async mm/page_io.c:451 [inline]
__swap_writepage+0x3a3/0xf50 mm/page_io.c:474
swap_writepage+0x403/0x1120 mm/page_io.c:289
pageout+0x3b2/0xaa0 mm/vmscan.c:689
shrink_folio_list+0x3025/0x42d0 mm/vmscan.c:1367
evict_folios+0x6e3/0x19c0 mm/vmscan.c:4593
try_to_shrink_lruvec+0x61e/0xa80 mm/vmscan.c:4789
shrink_one+0x3e3/0x7b0 mm/vmscan.c:4834
shrink_many mm/vmscan.c:4897 [inline]
lru_gen_shrink_node mm/vmscan.c:4975 [inline]
shrink_node+0x2763/0x3e60 mm/vmscan.c:5956
kswapd_shrink_node mm/vmscan.c:6785 [inline]
balance_pgdat+0xc1f/0x18f0 mm/vmscan.c:6977
kswapd+0x605/0xc00 mm/vmscan.c:7246
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>