INFO: task syz.3.13:5401 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.13 state:D stack:27424 pid:5401 tgid:5362 ppid:5235 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6767
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
fdget_pos+0x24e/0x320 fs/file.c:1187
ksys_write+0x7e/0x2b0 fs/read_write.c:727
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2285d7dff9
RSP: 002b:00007f2286b36038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2285f36130 RCX: 00007f2285d7dff9
RDX: 0000000000000118 RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007f2285df0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2285f36130 R15: 00007ffee21bba48
Showing all locks held in the system:
4 locks held by kworker/u8:0/11:
3 locks held by kworker/u8:1/12:
#0: ffff88802e370148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88802e370148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90000117d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000117d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
3 locks held by kworker/u8:7/1132:
3 locks held by kworker/u8:9/3042:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000a4d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000a4d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
1 lock held by dhcpcd/4888:
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1aa0 net/ipv4/devinet.c:1097
2 locks held by getty/4983:
#0: ffff8880339a20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.1.2/5323:
#0: ffff888029650420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
#0: ffff888029650420 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
2 locks held by bch-reclaim/loo/5351:
1 lock held by syz.3.13/5363:
#0: ffff88806438e420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
#0: ffff88806438e420 (sb_writers#14){.+.+}-{0:0}, at: vfs_writev+0x2d1/0xba0 fs/read_write.c:1062
2 locks held by syz.3.13/5398:
#0: ffff88807e871978 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x24e/0x320 fs/file.c:1187
#1: ffff88806438e420 (sb_writers#14){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
#1: ffff88806438e420 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
1 lock held by syz.3.13/5401:
#0: ffff88807e871978 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x24e/0x320 fs/file.c:1187
2 locks held by bch-copygc/loop/5388:
2 locks held by syz.2.25/5444:
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802
2 locks held by syz.3.50/5565:
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802
3 locks held by syz.3.137/6081:
#0: ffff88806438e0e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806438e0e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff88805f404398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88805f404398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88805f404398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3215
#2: ffff88805f4266d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1202
1 lock held by syz-executor/6129:
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
7 locks held by syz-executor/6138:
#0: ffff88802cefe420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
#0: ffff88802cefe420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
#1: ffff888051b85888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
#2: ffff888144bcfe18 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f55cfc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff8880443f20e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff8880443f20e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff8880443f20e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293
#5: ffff8880443f4250 (&devlink->lock_key#10){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdevice_notifier_net+0x89/0x3a0 net/core/dev.c:1917
3 locks held by syz.1.158/6169:
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff88805c184398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline]
#1: ffff88805c184398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline]
#1: ffff88805c184398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7de/0xd20 fs/bcachefs/btree_iter.c:3215
#2: ffff88805c1a66d0 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1202
1 lock held by syz-executor/6204:
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
1 lock held by syz-executor/6266:
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink net/core/rtnetlink.c:3720 [inline]
#0: ffffffff8fcbef48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xab7/0x20a0 net/core/rtnetlink.c:3743
2 locks held by syz.2.172/6282:
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880296500e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline]
#1: ffff888029650938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2495 Comm: kworker/u8:8 Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:__list_del include/linux/list.h:196 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:218 [inline]
RIP: 0010:list_del_init include/linux/list.h:287 [inline]
RIP: 0010:process_one_work kernel/workqueue.c:3170 [inline]
RIP: 0010:process_scheduled_works+0x6ad/0x1850 kernel/workqueue.c:3310
Code: 49 da 9c 00 4c 89 2b 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 27 da 9c 00 4d 89 75 00 <49> bd 00 00 00 00 00 fc ff df 48 8b 5c 24 30 eb 05 e8 8d 49 36 00
RSP: 0018:ffffc900090c7bc0 EFLAGS: 00000046
RAX: 1ffff110059d3908 RBX: ffff88802ce9c848 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880432e8670
RBP: ffffc900090c7dc0 R08: ffff88801ac89180 R09: 1ffff11003591230
R10: dffffc0000000000 R11: ffffed1003591231 R12: ffff8880432e8660
R13: ffff88802ce9c840 R14: ffff88802ce9c840 R15: ffff8880432e8668
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff167bff000 CR3: 000000000e734000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244