INFO: task udevd:5815 blocked for more than 143 seconds.
Not tainted 6.12.0-rc7-syzkaller-00042-gf1b785f4c787 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:24080 pid:5815 tgid:5815 ppid:5199 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
wait_for_reconnect drivers/block/nbd.c:1043 [inline]
nbd_handle_cmd drivers/block/nbd.c:1085 [inline]
nbd_queue_rq+0xcbc/0x1220 drivers/block/nbd.c:1143
blk_mq_dispatch_rq_list+0x443/0x1dc0 block/blk-mq.c:2030
__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+0xd4/0x150 block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x451/0x9a0 block/blk-mq.c:2243
blk_mq_dispatch_plug_list block/blk-mq.c:2747 [inline]
blk_mq_flush_plug_list+0x5df/0x1be0 block/blk-mq.c:2798
__blk_flush_plug+0x2c5/0x4b0 block/blk-core.c:1199
blk_finish_plug block/blk-core.c:1226 [inline]
blk_finish_plug block/blk-core.c:1223 [inline]
__submit_bio+0x3fb/0x4d0 block/blk-core.c:623
__submit_bio_noacct_mq block/blk-core.c:696 [inline]
submit_bio_noacct_nocheck+0x6fb/0xd70 block/blk-core.c:725
submit_bio_noacct+0x9e6/0x1f10 block/blk-core.c:854
submit_bh fs/buffer.c:2824 [inline]
block_read_full_folio+0x812/0xa50 fs/buffer.c:2451
filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2367
do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3825
read_mapping_folio include/linux/pagemap.h:1011 [inline]
read_part_sector+0xd3/0x410 block/partitions/core.c:714
adfspart_check_ICS+0x94/0x940 block/partitions/acorn.c:360
check_partition block/partitions/core.c:138 [inline]
blk_add_partitions block/partitions/core.c:581 [inline]
bdev_disk_changed+0x71f/0x1520 block/partitions/core.c:685
blkdev_get_whole+0x187/0x290 block/bdev.c:707
bdev_open+0x2c7/0xe20 block/bdev.c:916
blkdev_open+0x36c/0x450 block/fops.c:631
do_dentry_open+0x6ca/0x1530 fs/open.c:958
vfs_open+0x82/0x3f0 fs/open.c:1088
do_open fs/namei.c:3774 [inline]
path_openat+0x1e6a/0x2d60 fs/namei.c:3933
do_filp_open+0x1dc/0x430 fs/namei.c:3960
do_sys_openat2+0x17a/0x1e0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_openat fs/open.c:1446 [inline]
__se_sys_openat fs/open.c:1441 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1441
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
RIP: 0033:0x7fd2405169a4
RSP: 002b:00007ffd45c35a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000563a30cc08a0 RCX: 00007fd2405169a4
RDX: 00000000000a0800 RSI: 0000563a30cde3e0 RDI: 00000000ffffff9c
RBP: 0000563a30cde3e0 R08: 0000000000000001 R09: 00007fd240969080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000563a30cdd800 R14: 0000000000000001 R15: 0000563a30cb12c0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
2 locks held by getty/5588:
#0: ffff88814dca90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by udevd/5814:
#0: ffff8880261434c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff8881433ea710 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff8881433ea710 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff8881433ea710 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff8880261b0180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5815:
#0: ffff88814376b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff8881433ea290 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff8881433ea290 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff8881433ea290 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026190180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5827:
#0: ffff888025b0f4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff888025496190 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff888025496190 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff888025496190 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026228180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5834:
#0: ffff8880261474c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff8881433eac90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff8881433eac90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff8881433eac90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026248180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/5845:
#0: ffff88802634b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff888025204210 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff888025204210 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff888025204210 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff8880263e8180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
1 lock held by syz.2.58/6130:
#0: ffff88814376b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0xfd/0x360 block/bdev.c:1247
3 locks held by udevd/6399:
#0: ffff8880262774c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff88802475f790 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88802475f790 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88802475f790 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026370180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/6400:
#0: ffff8880261e74c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff888025496c90 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff888025496c90 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff888025496c90 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026318180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/6401:
#0: ffff88802639b4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff88802475fd10 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88802475fd10 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88802475fd10 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026860180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/6402:
#0: ffff8880262734c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff88802475f210 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88802475f210 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88802475f210 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff8880262e8180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/6547:
#0: ffff88802639f4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff88801ffdc190 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88801ffdc190 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88801ffdc190 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff888026880180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
3 locks held by udevd/6642:
#0: ffff8880261e34c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe20 block/bdev.c:904
#1: ffff888025496710 (set->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff888025496710 (set->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff888025496710 (set->srcu){.+.+}-{0:0}, at: blk_mq_run_hw_queue+0x443/0x9a0 block/blk-mq.c:2243
#2: ffff8880262b0180 (&cmd->lock){+.+.}-{3:3}, at: nbd_queue_rq+0xbe/0x1220 drivers/block/nbd.c:1135
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller-00042-gf1b785f4c787 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.12.0-rc7-syzkaller-00042-gf1b785f4c787 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:__kasan_slab_pre_free+0x0/0x30 mm/kasan/common.c:252
Code: 89 f3 e8 03 2d 00 00 48 89 d8 5b c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 48 8b 05 95 85 70 0e 48 89 f1 48 29 c1 48 81 f9 ff ff
RSP: 0018:ffffc90000107ae8 EFLAGS: 00000292
RAX: ffff88823be00000 RBX: ffff88807bd8e400 RCX: 0000000000000000
RDX: ffffffff88f4303a RSI: ffff88807bd8e400 RDI: ffff88801eafda00
RBP: ffffc90000107b48 R08: 0000000000000001 R09: fffffbfff2dc5d95
R10: ffffffff96e2ecaf R11: 0000000000000000 R12: ffff88801eafda00
R13: 0000000000212110 R14: ffffea0001ef6300 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000200000000 CR3: 0000000035baa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_slab_pre_free include/linux/kasan.h:195 [inline]
slab_free_hook mm/slub.c:2287 [inline]
slab_free mm/slub.c:4579 [inline]
kmem_cache_free+0x121/0x4b0 mm/slub.c:4681
skb_kfree_head net/core/skbuff.c:1084 [inline]
skb_kfree_head net/core/skbuff.c:1081 [inline]
skb_free_head+0x18a/0x1d0 net/core/skbuff.c:1098
skb_release_data+0x560/0x730 net/core/skbuff.c:1125
skb_release_all net/core/skbuff.c:1190 [inline]
__kfree_skb net/core/skbuff.c:1204 [inline]
sk_skb_reason_drop+0x129/0x1a0 net/core/skbuff.c:1242
kfree_skb_reason include/linux/skbuff.h:1262 [inline]
kfree_skb include/linux/skbuff.h:1271 [inline]
ieee80211_iface_work+0x437/0xf00 net/mac80211/iface.c:1659
cfg80211_wiphy_work+0x3d9/0x550 net/wireless/core.c:440
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