INFO: task syz-executor:5817 blocked for more than 143 seconds.
Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:13872 pid:5817 tgid:5817 ppid:1 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5366 [inline]
__schedule+0x1ac3/0x5090 kernel/sched/core.c:6747
__schedule_loop kernel/sched/core.c:6824 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6839
schedule_timeout+0xb1/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x360/0x630 kernel/sched/completion.c:148
kthread_stop+0x1a1/0x640 kernel/kthread.c:791
bch2_copygc_stop+0x4f/0x150 fs/bcachefs/movinggc.c:413
__bch2_fs_read_only+0x47/0x450 fs/bcachefs/super.c:265
bch2_fs_read_only+0xc80/0x1360 fs/bcachefs/super.c:356
__bch2_fs_stop+0x107/0x5b0 fs/bcachefs/super.c:634
generic_shutdown_super+0x139/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2312
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x251/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f578318e497
RSP: 002b:00007ffd1abbc0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f578320e08c RCX: 00007f578318e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd1abbc180
RBP: 00007ffd1abbc180 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd1abbd210
R13: 00007f578320e08c R14: 0000000000030f5d R15: 00007ffd1abbd250
INFO: task syz.6.289:8881 blocked for more than 144 seconds.
Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.289 state:D stack:24776 pid:8881 tgid:8873 ppid:6278 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5366 [inline]
__schedule+0x1ac3/0x5090 kernel/sched/core.c:6747
__schedule_loop kernel/sched/core.c:6824 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6839
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6896
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x74c/0xae0 kernel/locking/rwsem.c:1526
__super_lock fs/super.c:58 [inline]
super_lock+0x27c/0x400 fs/super.c:120
super_lock_shared fs/super.c:139 [inline]
iterate_supers+0x8c/0x190 fs/super.c:931
ksys_sync+0xc2/0x1d0 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe13bf8d169
RSP: 002b:00007fe13cdc5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fe13c1a5fa0 RCX: 00007fe13bf8d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fe13c1a5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe13c1a5fa0 R15: 00007ffedd4f51f8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8eb3a860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6761
3 locks held by kworker/u8:3/48:
2 locks held by dhcpcd/5488:
#0: ffffffff8fea74a8 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x68a/0x900 net/socket.c:1280
#1: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5f/0x8b0 net/wireless/nl80211.c:16673
2 locks held by getty/5575:
#0: ffff88803169a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x53d/0x16b0 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5817:
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888069600278 (&c->state_lock){+.+.}-{4:4}, at: __bch2_fs_stop+0xff/0x5b0 fs/bcachefs/super.c:633
1 lock held by syz.6.289/8881:
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.6.494/11100:
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880672900e0 (&type->s_umount_key#105){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz-executor/11586:
#0: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#0: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x406/0x1c40 net/ipv4/devinet.c:987
3 locks held by syz-executor/11616:
#0: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#0: ffffffff8fec2588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xd6a/0x1f60 net/core/rtnetlink.c:4021
#1: ffff8880475514e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x22d/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8eb3fd78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#2: ffffffff8eb3fd78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x384/0x830 kernel/rcu/tree_exp.h:998
2 locks held by syz.8.560/11819:
3 locks held by syz.5.561/11827:
2 locks held by syz.3.563/11835:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11586 Comm: syz-executor Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:debug_lockdep_rcu_enabled+0xd/0x40 kernel/rcu/update.c:320
Code: f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 83 3d 37 8a 28 04 00 <74> 1e 83 3d da bb 28 04 00 74 15 65 48 8b 0c 25 08 70 3c 93 31 c0
RSP: 0018:ffffc900000074b8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88801d6bda00 RCX: 1ffff110170e7488
RDX: 0000000000000000 RSI: ffffffff8c801bc0 RDI: ffffffff8c801b80
RBP: ffffc900000075f0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff1100fd1abeb R14: ffffffff933c7020 R15: ffffe8ffffd21840
FS: 000055556fc9e500(0000) GS:ffff888125259000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003000 CR3: 0000000062fa0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__sched_mm_cid_migrate_from_fetch_cid kernel/sched/core.c:10318 [inline]
sched_mm_cid_migrate_to+0x50a/0x1100 kernel/sched/core.c:10430
activate_task+0x54/0xc0 kernel/sched/core.c:2110
attach_task+0xee/0x190 kernel/sched/fair.c:9683
attach_tasks kernel/sched/fair.c:9718 [inline]
sched_balance_rq+0x6971/0x8b50 kernel/sched/fair.c:11822
sched_balance_domains+0x567/0xa90 kernel/sched/fair.c:12230
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xfb/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x702/0xa10 kernel/printk/printk.c:2431
Code: 00 e8 52 51 21 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 40 51 21 00 eb 06 e8 39 51 21 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 00 64 a1 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc900057369e0 EFLAGS: 00000293
RAX: ffffffff81a214b7 RBX: 0000000000000000 RCX: ffff8880251e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005736af0 R08: ffffffff81a21490 R09: 1ffffffff207780e
R10: dffffc0000000000 R11: fffffbfff207780f R12: dffffc0000000000
R13: 1ffff92000ae6d40 R14: ffffffff81a212f2 R15: ffffc90005736a80
_printk+0xd5/0x120 kernel/printk/printk.c:2457
batadv_check_known_mac_addr+0x2b1/0x410 net/batman-adv/hard-interface.c:526
batadv_hard_if_event+0x3a5/0x1810 net/batman-adv/hard-interface.c:998
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2244 [inline]
call_netdevice_notifiers net/core/dev.c:2258 [inline]
dev_set_mac_address+0x3db/0x510 net/core/dev.c:9519
dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9533
do_setlink+0x721/0x4130 net/core/rtnetlink.c:3073
rtnl_changelink net/core/rtnetlink.c:3733 [inline]
__rtnl_newlink net/core/rtnetlink.c:3885 [inline]
rtnl_newlink+0x1945/0x1f60 net/core/rtnetlink.c:4022
rtnetlink_rcv_msg+0x80f/0xd70 net/core/rtnetlink.c:6912
netlink_rcv_skb+0x208/0x480 net/netlink/af_netlink.c:2533
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1338
netlink_sendmsg+0x8e8/0xce0 net/netlink/af_netlink.c:1882
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
__sys_sendto+0x365/0x4c0 net/socket.c:2187
__do_sys_sendto net/socket.c:2194 [inline]
__se_sys_sendto net/socket.c:2190 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2190
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa08438effc
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffd09dca930 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fa0850d4620 RCX: 00007fa08438effc
RDX: 000000000000002c RSI: 00007fa0850d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd09dca984 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fa0850d4670 R15: 0000000000000000