INFO: task syz.7.289:8846 blocked for more than 143 seconds.
Not tainted 6.14.0-rc4-syzkaller-00073-g5394eea10651 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.289 state:D stack:23872 pid:8846 tgid:8845 ppid:6640 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
jfs_flush_journal+0x72c/0xec0 fs/jfs/jfs_logmgr.c:1564
jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:649
sync_filesystem+0x1c8/0x230 fs/sync.c:66
jfs_reconfigure+0xd6/0x9d0 fs/jfs/super.c:370
reconfigure_super+0x43a/0x870 fs/super.c:1083
vfs_cmd_reconfigure fs/fsopen.c:262 [inline]
vfs_fsconfig_locked fs/fsopen.c:291 [inline]
__do_sys_fsconfig fs/fsopen.c:467 [inline]
__se_sys_fsconfig+0xb74/0xf60 fs/fsopen.c:344
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: 0033:0x7fbda838d169
RSP: 002b:00007fbda92a7038 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fbda85a5fa0 RCX: 00007fbda838d169
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000004
RBP: 00007fbda840e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbda85a5fa0 R15: 00007ffe1f51dd78
INFO: task syz.7.289:8851 blocked for more than 144 seconds.
Not tainted 6.14.0-rc4-syzkaller-00073-g5394eea10651 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.289 state:D stack:24160 pid:8851 tgid:8845 ppid:6640 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
do_remount fs/namespace.c:3097 [inline]
path_mount+0xbdb/0xfa0 fs/namespace.c:3879
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
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: 0033:0x7fbda838d169
RSP: 002b:00007fbda9286038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbda85a6080 RCX: 00007fbda838d169
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 0000000000000000
RBP: 00007fbda840e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000021 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbda85a6080 R15: 00007ffe1f51dd78
Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
#0: ffff88814cc93948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88814cc93948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317
#1: ffffc90000107c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc90000107c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317
#2: ffff888012834910 (&hard_iface->bat_iv.ogm_buff_mutex){+.+.}-{4:4}, at: batadv_iv_ogm_schedule+0xde/0x10a0 net/batman-adv/bat_iv_ogm.c:867
1 lock held by khungtaskd/30:
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
4 locks held by kworker/u8:2/35:
#0: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffffc90000ab7c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc90000ab7c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317
#2: ffffffff8e9d4e50 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_enable+0x12/0x20 kernel/jump_label.c:222
#3: ffffffff8ebf03a8 (jump_label_mutex){+.+.}-{4:4}, at: jump_label_lock kernel/jump_label.c:27 [inline]
#3: ffffffff8ebf03a8 (jump_label_mutex){+.+.}-{4:4}, at: static_key_enable_cpuslocked+0xd7/0x260 kernel/jump_label.c:207
2 locks held by getty/5576:
#0: ffff88803561a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5807:
#0: ffff8880b863e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
3 locks held by kworker/u8:8/6136:
2 locks held by syz.7.289/8846:
#0: ffff88805c48d870 (&fc->uapi_mutex){+.+.}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:465 [inline]
#0: ffff88805c48d870 (&fc->uapi_mutex){+.+.}-{4:4}, at: __se_sys_fsconfig+0x9b2/0xf60 fs/fsopen.c:344
#1: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: vfs_cmd_reconfigure fs/fsopen.c:261 [inline]
#1: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: vfs_fsconfig_locked fs/fsopen.c:291 [inline]
#1: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:467 [inline]
#1: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: __se_sys_fsconfig+0xb6a/0xf60 fs/fsopen.c:344
1 lock held by syz.7.289/8851:
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: do_remount fs/namespace.c:3097 [inline]
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: path_mount+0xbdb/0xfa0 fs/namespace.c:3879
1 lock held by syz.9.322/9192:
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.9.322/9227:
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.3.438/10812:
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888033f180e0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120
3 locks held by syz-executor/11033:
2 locks held by syz-executor/11564:
#0: ffffffff8fec2f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec2f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#0: ffffffff8fec2f08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc55/0x1d30 net/core/rtnetlink.c:4021
#1: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline]
#1: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x820 kernel/rcu/tree_exp.h:996
1 lock held by syz.4.537/12003:
3 locks held by dhcpcd-run-hook/12044:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc4-syzkaller-00073-g5394eea10651 #0
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+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: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:148
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: 11564 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00073-g5394eea10651 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:match_held_lock+0x1/0xb0 kernel/locking/lockdep.c:5296
Code: 83 c4 10 5b 41 5e 41 5f c3 cc cc cc cc e8 07 f9 ff ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <53> bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 20 00
RSP: 0018:ffffc90000007e10 EFLAGS: 00000087
RAX: 0000000000000004 RBX: ffff8880263d6568 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8ec50a98 RDI: ffff8880263d6568
RBP: 0000000000000003 R08: 0000000000000003 R09: fffff52000000fa8
R10: dffffc0000000000 R11: fffff52000000fa8 R12: 0000000000000046
R13: ffff8880263d5a00 R14: 00000000ffffffff R15: ffffffff8ec50a98
FS: 000055556508c500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562d849c0950 CR3: 00000000410fe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5592 [inline]
lock_is_held_type+0xa9/0x190 kernel/locking/lockdep.c:5923
lock_is_held include/linux/lockdep.h:249 [inline]
__wake_up_common kernel/sched/wait.c:78 [inline]
__wake_up_common_lock+0x62/0x1e0 kernel/sched/wait.c:106
irq_work_single+0xe2/0x240 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x18b/0x350 kernel/irq_work.c:261
__sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:149 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:256 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 93 31 bb 03 0f 1f
RSP: 0018:ffffc9000bac6a68 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: 0000000000000200 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: ffffffff815fda8e R09: 1ffff92001758d38
R10: dffffc0000000000 R11: fffff52001758d39 R12: ffffffff8ec50b08
R13: 0000000000000000 R14: 2c1008001f8bfbff R15: 0000000000000020
__apic_send_IPI_self arch/x86/include/asm/apic.h:455 [inline]
arch_irq_work_raise+0x6f/0x80 arch/x86/kernel/irq_work.c:31
irq_work_queue+0xa7/0x150 kernel/irq_work.c:124
__kfence_alloc+0x2b0/0x400 mm/kfence/core.c:1114
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:4148 [inline]
__kmalloc_cache_noprof+0x2dd/0x390 mm/slub.c:4320
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline]
nsim_fib_event_nb+0x17c/0x10b0 drivers/net/netdevsim/fib.c:1043
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
atomic_notifier_call_chain+0xdb/0x180 kernel/notifier.c:223
call_fib_notifiers+0x31/0x60 net/core/fib_notifier.c:35
call_fib_entry_notifiers+0x213/0x370 net/ipv4/fib_trie.c:107
fib_table_insert+0xee8/0x1f20 net/ipv4/fib_trie.c:1389
fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1112
fib_add_ifaddr+0x14c/0x5e0 net/ipv4/fib_frontend.c:1134
fib_inetaddr_event+0x167/0x1f0 net/ipv4/fib_frontend.c:1448
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:380
__inet_insert_ifa+0xa68/0xc90 net/ipv4/devinet.c:575
inet_rtm_newaddr+0x1220/0x1bc0 net/ipv4/devinet.c:1010
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
__sys_sendto+0x363/0x4c0 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/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c3298effc
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:00007ffea94551a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1c336d4620 RCX: 00007f1c3298effc
RDX: 0000000000000028 RSI: 00007f1c336d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffea94551f4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f1c336d4670 R15: 0000000000000000