tmpfs: Bad value for 'mpol'
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc4-syzkaller-00278-gece144f151ac #0 Not tainted
------------------------------------------------------
syz.1.8442/7077 is trying to acquire lock:
ffff8880220a1910 (set->srcu){.+.+}-{0:0}, at: srcu_lock_sync include/linux/srcu.h:176 [inline]
ffff8880220a1910 (set->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x99/0x2a0 kernel/rcu/srcutree.c:1418
but task is already holding lock:
ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_elv_switch_none block/blk-mq.c:4937 [inline]
ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: __blk_mq_update_nr_hw_queues block/blk-mq.c:5018 [inline]
ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_update_nr_hw_queues+0x4a7/0x1360 block/blk-mq.c:5070
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #6 (&q->sysfs_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
blk_mq_elv_switch_none block/blk-mq.c:4937 [inline]
__blk_mq_update_nr_hw_queues block/blk-mq.c:5018 [inline]
blk_mq_update_nr_hw_queues+0x4a7/0x1360 block/blk-mq.c:5070
nbd_start_device+0x172/0xcd0 drivers/block/nbd.c:1476
nbd_start_device_ioctl drivers/block/nbd.c:1527 [inline]
__nbd_ioctl drivers/block/nbd.c:1602 [inline]
nbd_ioctl+0x21a/0xd60 drivers/block/nbd.c:1642
compat_blkdev_ioctl+0x2eb/0x7a0 block/ioctl.c:749
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #5 (&q->q_usage_counter(io)#50){++++}-{0:0}:
bio_queue_enter block/blk.h:78 [inline]
blk_mq_submit_bio+0x20f5/0x2610 block/blk-mq.c:3091
__submit_bio+0x3d1/0x690 block/blk-core.c:628
__submit_bio_noacct_mq block/blk-core.c:715 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:744
submit_bio_noacct+0x50d/0x1ec0 block/blk-core.c:867
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x812/0xa50 fs/buffer.c:2446
filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2390
filemap_update_page mm/filemap.c:2474 [inline]
filemap_get_pages+0x10ad/0x1c30 mm/filemap.c:2602
filemap_read+0x3c5/0xe70 mm/filemap.c:2691
blkdev_read_iter+0x187/0x4b0 block/fops.c:796
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x886/0xbf0 fs/read_write.c:565
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #4 (mapping.invalidate_lock#2){++++}-{4:4}:
down_read+0x9a/0x330 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
filemap_fault+0x1845/0x2ca0 mm/filemap.c:3454
__do_fault+0x10a/0x490 mm/memory.c:4988
do_read_fault mm/memory.c:5403 [inline]
do_fault mm/memory.c:5537 [inline]
do_pte_missing+0xecf/0x3e10 mm/memory.c:4058
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x1166/0x2c60 mm/memory.c:6043
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6212
do_user_addr_fault+0x7a3/0x13f0 arch/x86/mm/fault.c:1388
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
copy_from_user_iter lib/iov_iter.c:55 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
__copy_from_iter lib/iov_iter.c:249 [inline]
_copy_from_iter+0x380/0x1560 lib/iov_iter.c:260
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
tipc_msg_build+0x308/0x1120 net/tipc/msg.c:408
__tipc_sendstream+0x6fa/0x1190 net/tipc/socket.c:1615
tipc_sendstream+0x4f/0x70 net/tipc/socket.c:1546
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:733 [inline]
sock_write_iter+0x4fe/0x5b0 net/socket.c:1137
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x207/0x250 fs/read_write.c:731
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #3 (sk_lock-AF_TIPC){+.+.}-{0:0}:
lock_sock_nested+0x3a/0xf0 net/core/sock.c:3662
lock_sock include/net/sock.h:1624 [inline]
tipc_shutdown+0x65/0x580 net/tipc/socket.c:2802
nbd_mark_nsock_dead+0xae/0x5d0 drivers/block/nbd.c:318
sock_shutdown+0x17c/0x280 drivers/block/nbd.c:411
nbd_start_device_ioctl drivers/block/nbd.c:1537 [inline]
__nbd_ioctl drivers/block/nbd.c:1602 [inline]
nbd_ioctl+0xb21/0xd60 drivers/block/nbd.c:1642
compat_blkdev_ioctl+0x2eb/0x7a0 block/ioctl.c:749
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #2 (&nsock->tx_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
nbd_handle_cmd drivers/block/nbd.c:1140 [inline]
nbd_queue_rq+0x424/0x1220 drivers/block/nbd.c:1204
blk_mq_dispatch_rq_list+0x443/0x1dc0 block/blk-mq.c:2120
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
__blk_mq_sched_dispatch_requests+0xcdf/0x1620 block/blk-mq-sched.c:309
blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2354
blk_mq_dispatch_plug_list block/blk-mq.c:2866 [inline]
blk_mq_flush_plug_list+0x673/0x1c60 block/blk-mq.c:2917
__blk_flush_plug+0x2c5/0x4b0 block/blk-core.c:1213
blk_finish_plug block/blk-core.c:1240 [inline]
blk_finish_plug block/blk-core.c:1237 [inline]
__submit_bio+0x547/0x690 block/blk-core.c:642
__submit_bio_noacct_mq block/blk-core.c:715 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:744
submit_bio_noacct+0x50d/0x1ec0 block/blk-core.c:867
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x812/0xa50 fs/buffer.c:2446
filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2390
do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3960
read_mapping_folio include/linux/pagemap.h:1023 [inline]
read_part_sector+0xd4/0x310 block/partitions/core.c:722
adfspart_check_ICS+0x94/0x940 block/partitions/acorn.c:360
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x71f/0x1520 block/partitions/core.c:693
blkdev_get_whole+0x187/0x290 block/bdev.c:706
bdev_open+0x2c7/0xe20 block/bdev.c:915
blkdev_open+0x27b/0x3f0 block/fops.c:652
do_dentry_open+0x735/0x1c40 fs/open.c:956
vfs_open+0x82/0x3f0 fs/open.c:1086
do_open fs/namei.c:3830 [inline]
path_openat+0x1e88/0x2d80 fs/namei.c:3989
do_filp_open+0x20c/0x470 fs/namei.c:4016
do_sys_openat2+0x17a/0x1e0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&cmd->lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19b/0xb10 kernel/locking/mutex.c:730
nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1196
blk_mq_dispatch_rq_list+0x443/0x1dc0 block/blk-mq.c:2120
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
__blk_mq_sched_dispatch_requests+0xcdf/0x1620 block/blk-mq-sched.c:309
blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2354
blk_mq_dispatch_plug_list block/blk-mq.c:2866 [inline]
blk_mq_flush_plug_list+0x673/0x1c60 block/blk-mq.c:2917
__blk_flush_plug+0x2c5/0x4b0 block/blk-core.c:1213
blk_finish_plug block/blk-core.c:1240 [inline]
blk_finish_plug block/blk-core.c:1237 [inline]
__submit_bio+0x547/0x690 block/blk-core.c:642
__submit_bio_noacct_mq block/blk-core.c:715 [inline]
submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:744
submit_bio_noacct+0x50d/0x1ec0 block/blk-core.c:867
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x812/0xa50 fs/buffer.c:2446
filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2390
do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3960
read_mapping_folio include/linux/pagemap.h:1023 [inline]
read_part_sector+0xd4/0x310 block/partitions/core.c:722
adfspart_check_ICS+0x94/0x940 block/partitions/acorn.c:360
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x71f/0x1520 block/partitions/core.c:693
blkdev_get_whole+0x187/0x290 block/bdev.c:706
bdev_open+0x2c7/0xe20 block/bdev.c:915
blkdev_open+0x27b/0x3f0 block/fops.c:652
do_dentry_open+0x735/0x1c40 fs/open.c:956
vfs_open+0x82/0x3f0 fs/open.c:1086
do_open fs/namei.c:3830 [inline]
path_openat+0x1e88/0x2d80 fs/namei.c:3989
do_filp_open+0x20c/0x470 fs/namei.c:4016
do_sys_openat2+0x17a/0x1e0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1454
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (set->srcu){.+.+}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_sync+0xf5/0x190 kernel/locking/lockdep.c:5899
srcu_lock_sync include/linux/srcu.h:176 [inline]
__synchronize_srcu+0xa9/0x2a0 kernel/rcu/srcutree.c:1418
blk_mq_wait_quiesce_done block/blk-mq.c:293 [inline]
blk_mq_wait_quiesce_done block/blk-mq.c:290 [inline]
blk_mq_quiesce_queue block/blk-mq.c:313 [inline]
blk_mq_quiesce_queue+0x149/0x1b0 block/blk-mq.c:308
elevator_disable+0xe9/0x570 block/elevator.c:661
blk_mq_elv_switch_none block/blk-mq.c:4951 [inline]
__blk_mq_update_nr_hw_queues block/blk-mq.c:5018 [inline]
blk_mq_update_nr_hw_queues+0x41c/0x1360 block/blk-mq.c:5070
nbd_start_device+0x172/0xcd0 drivers/block/nbd.c:1476
nbd_start_device_ioctl drivers/block/nbd.c:1527 [inline]
__nbd_ioctl drivers/block/nbd.c:1602 [inline]
nbd_ioctl+0x21a/0xd60 drivers/block/nbd.c:1642
compat_blkdev_ioctl+0x2eb/0x7a0 block/ioctl.c:749
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
other info that might help us debug this:
Chain exists of:
set->srcu --> &q->q_usage_counter(io)#50 --> &q->sysfs_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->sysfs_lock);
lock(&q->q_usage_counter(io)#50);
lock(&q->sysfs_lock);
sync(set->srcu);
*** DEADLOCK ***
5 locks held by syz.1.8442/7077:
#0: ffff88801f899198 (&nbd->config_lock){+.+.}-{4:4}, at: nbd_ioctl+0x151/0xd60 drivers/block/nbd.c:1635
#1: ffff88801f8990d8 (&set->tag_list_lock){+.+.}-{4:4}, at: blk_mq_update_nr_hw_queues+0x8f/0x1360 block/blk-mq.c:5069
#2: ffff888043db1c38 (&q->q_usage_counter(io)#50){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave block/blk-mq.c:215 [inline]
#2: ffff888043db1c38 (&q->q_usage_counter(io)#50){++++}-{0:0}, at: __blk_mq_update_nr_hw_queues block/blk-mq.c:5010 [inline]
#2: ffff888043db1c38 (&q->q_usage_counter(io)#50){++++}-{0:0}, at: blk_mq_update_nr_hw_queues+0x264/0x1360 block/blk-mq.c:5070
#3: ffff888043db1c70 (&q->q_usage_counter(queue)#34){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave block/blk-mq.c:215 [inline]
#3: ffff888043db1c70 (&q->q_usage_counter(queue)#34){+.+.}-{0:0}, at: __blk_mq_update_nr_hw_queues block/blk-mq.c:5010 [inline]
#3: ffff888043db1c70 (&q->q_usage_counter(queue)#34){+.+.}-{0:0}, at: blk_mq_update_nr_hw_queues+0x264/0x1360 block/blk-mq.c:5070
#4: ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_elv_switch_none block/blk-mq.c:4937 [inline]
#4: ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: __blk_mq_update_nr_hw_queues block/blk-mq.c:5018 [inline]
#4: ffff888043db2168 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_update_nr_hw_queues+0x4a7/0x1360 block/blk-mq.c:5070
stack backtrace:
CPU: 0 UID: 0 PID: 7077 Comm: syz.1.8442 Not tainted 6.14.0-rc4-syzkaller-00278-gece144f151ac #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+0x490/0x760 kernel/locking/lockdep.c:2076
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_sync+0xf5/0x190 kernel/locking/lockdep.c:5899
srcu_lock_sync include/linux/srcu.h:176 [inline]
__synchronize_srcu+0xa9/0x2a0 kernel/rcu/srcutree.c:1418
blk_mq_wait_quiesce_done block/blk-mq.c:293 [inline]
blk_mq_wait_quiesce_done block/blk-mq.c:290 [inline]
blk_mq_quiesce_queue block/blk-mq.c:313 [inline]
blk_mq_quiesce_queue+0x149/0x1b0 block/blk-mq.c:308
elevator_disable+0xe9/0x570 block/elevator.c:661
blk_mq_elv_switch_none block/blk-mq.c:4951 [inline]
__blk_mq_update_nr_hw_queues block/blk-mq.c:5018 [inline]
blk_mq_update_nr_hw_queues+0x41c/0x1360 block/blk-mq.c:5070
nbd_start_device+0x172/0xcd0 drivers/block/nbd.c:1476
nbd_start_device_ioctl drivers/block/nbd.c:1527 [inline]
__nbd_ioctl drivers/block/nbd.c:1602 [inline]
nbd_ioctl+0x21a/0xd60 drivers/block/nbd.c:1642
compat_blkdev_ioctl+0x2eb/0x7a0 block/ioctl.c:749
__do_compat_sys_ioctl+0x1cb/0x2c0 fs/ioctl.c:1004
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f62579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f504455c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 000000000000ab03
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
block nbd1: shutting down sockets
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi