INFO: task syz.1.149:4594 blocked for more than 144 seconds.
Not tainted 6.1.107-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.149 state:D stack:24776 pid:4594 ppid:3641 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
iterate_supers+0x127/0x1e0 fs/super.c:757
ksys_sync+0xd7/0x1c0 fs/sync.c:104
__do_sys_sync+0xa/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6366579ef9
RSP: 002b:00007f6367416038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f6366715f80 RCX: 00007f6366579ef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f63665e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6366715f80 R15: 00007ffc6f78a508
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b190 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32b990 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
3 locks held by kworker/1:0/22:
#0: ffff888012870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900001c7d20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff88807cc9d240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2cd/0x4120 drivers/net/netdevsim/fib.c:1489
1 lock held by khungtaskd/27:
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
3 locks held by kworker/u4:4/56:
1 lock held by udevd/3091:
2 locks held by getty/3397:
#0: ffff888029463098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
3 locks held by syz-executor/3645:
2 locks held by kworker/1:4/3689:
2 locks held by syz.1.149/4594:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.2.144/4785:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.3.226/5022:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.1.230/5042:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.2.255/5166:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.4.256/5169:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz.1.273/5279:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
3 locks held by kworker/1:12/5389:
#0: ffff8880288e6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900036b7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8e4f8de8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcc/0x16b0 net/ipv6/addrconf.c:4115
3 locks held by kworker/1:13/5402:
#0: ffff8880192b8d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000364fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff888144762190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#2: ffff888144762190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5730 drivers/usb/core/hub.c:5801
2 locks held by syz.0.309/5427:
#0: ffff88805acb60e0 (&type->s_umount_key#63){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:755
#1: ffff88805acb40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
3 locks held by syz-executor/5468:
1 lock held by syz.1.335/5614:
1 lock held by syz.3.337/5624:
1 lock held by syz.4.338/5626:
#0: ffffffff8d1e82a8 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x49/0x1d0 kernel/sched/core.c:398
2 locks held by syz.4.338/5630:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5468 Comm: syz-executor Not tainted 6.1.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:52 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:178 [inline]
RIP: 0010:unwind_next_frame+0x4bf/0x2220 arch/x86/kernel/unwind_orc.c:448
Code: b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 4c 39 e8 4c 0f 46 f9 48 8d 43 fc 48 0f 47 e8 <4c> 0f 46 e3 49 39 ef 76 a9 e9 a7 fd ff ff 89 d9 80 e1 07 80 c1 03
RSP: 0018:ffffc90003b6eb40 EFLAGS: 00000283
RAX: ffffffff8eab9cdc RBX: ffffffff8eab9ce0 RCX: ffffffff8eab9ce4
RDX: ffffffff8f18efa4 RSI: ffffffff81786ac3 RDI: dffffc0000000000
RBP: ffffffff8eab9ce0 R08: 0000000000000001 R09: ffffc90003b6ed10
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8eab9ce0
R13: ffffffff81786ac2 R14: ffffffff8eab9ce0 R15: ffffffff8eab9ce4
FS: 000055556cc96500(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3201aff8 CR3: 0000000039c29000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x5de/0x7a0 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
consume_skb+0xa3/0x140 net/core/skbuff.c:1035
netlink_broadcast+0xf8b/0x10b0 net/netlink/af_netlink.c:1523
nlmsg_multicast include/net/netlink.h:1071 [inline]
nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2550
rtmsg_ifa+0x234/0x3a0 net/ipv4/devinet.c:1931
__inet_insert_ifa+0x9b7/0xbd0 net/ipv4/devinet.c:553
inet_rtm_newaddr+0x8d3/0x18e0 net/ipv4/devinet.c:960
rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6121
netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2507
netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
__sys_sendto+0x480/0x600 net/socket.c:2148
__do_sys_sendto net/socket.c:2160 [inline]
__se_sys_sendto net/socket.c:2156 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2156
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff29d97bd8c
Code: 2a 5a 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 5a 02 00 48 8b
RSP: 002b:00007ffd4865c960 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007ff29e644620 RCX: 00007ff29d97bd8c
RDX: 0000000000000028 RSI: 00007ff29e644670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd4865c9b4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007ff29e644670 R15: 0000000000000000