INFO: task syz-executor:24212 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22232 pid:24212 tgid:24212 ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 io_schedule+0x81/0xe0 kernel/sched/core.c:7742
 folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
 __folio_lock mm/filemap.c:1664 [inline]
 folio_lock include/linux/pagemap.h:1137 [inline]
 __filemap_get_folio+0x139/0xaf0 mm/filemap.c:1917
 truncate_inode_pages_range+0x3ed/0xda0 mm/truncate.c:384
 evict+0x517/0x9c0 fs/inode.c:812
 dispose_list fs/inode.c:852 [inline]
 evict_inodes+0x636/0x6c0 fs/inode.c:906
 generic_shutdown_super+0x9a/0x2c0 fs/super.c:627
 kill_block_super+0x44/0x90 fs/super.c:1710
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1431
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50
 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+0x9a/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f593958fc97
RSP: 002b:00007ffcf50576a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f593961089d RCX: 00007f593958fc97
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf5057760
RBP: 00007ffcf5057760 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcf50587f0
R13: 00007f593961089d R14: 0000000000120fdd R15: 00007ffcf5058830
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
2 locks held by getty/5584:
 #0: ffff88803000a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/24212:
 #0: ffff88807eba80e0 (&type->s_umount_key#76){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff88807eba80e0 (&type->s_umount_key#76){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff88807eba80e0 (&type->s_umount_key#76){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
 watchdog+0xfee/0x1030 kernel/hung_task.c:437
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
RIP: 0010:find_match+0x146/0xc90 net/ipv6/route.c:781
Code: 00 00 48 81 c3 54 06 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 32 0a 00 00 8b 1b 31 ff 89 de e8 ac 9e b0 f7 85 db <74> 45 e8 63 9a b0 f7 43 0f b6 04 26 84 c0 0f 85 2e 0a 00 00 41 0f
RSP: 0018:ffffc90000a076c0 EFLAGS: 00000246
RAX: ffffffff8a0f5784 RBX: 0000000000000000 RCX: 0000000000000100
RDX: ffff88801c6c0000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100f723d97 R08: ffffc90000a079c0 R09: ffffc90000a079d0
R10: dffffc0000000000 R11: fffff52000140f06 R12: dffffc0000000000
R13: 0000000000000003 R14: 1ffff1100f723d99 R15: ffff88807b91eccf
FS:  0000000000000000(0000) GS:ffff8881261c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7383381c78 CR3: 000000007c0b8000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __find_rr_leaf+0x23a/0x6d0 net/ipv6/route.c:869
 find_rr_leaf net/ipv6/route.c:890 [inline]
 rt6_select net/ipv6/route.c:934 [inline]
 fib6_table_lookup+0x39f/0xa80 net/ipv6/route.c:2230
 ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2266
 pol_lookup_func include/net/ip6_fib.h:616 [inline]
 fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120
 ip6_route_input_lookup net/ipv6/route.c:2335 [inline]
 ip6_route_input+0x6ce/0xa50 net/ipv6/route.c:2631
 ip6_rcv_finish+0x141/0x2d0 net/ipv6/ip6_input.c:77
 ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:993
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:626
 nf_hook include/linux/netfilter.h:269 [inline]
 NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:312
 __netif_receive_skb_one_core net/core/dev.c:5887 [inline]
 __netif_receive_skb+0xd3/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 NF_HOOK+0xa0/0x390 include/linux/netfilter.h:315
 br_handle_frame_finish+0x1489/0x1950 net/bridge/br_input.c:-1
 br_nf_hook_thresh+0x3c2/0x490 net/bridge/br_netfilter_hooks.c:-1
 br_nf_pre_routing_finish_ipv6+0x948/0xd00 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:314 [inline]
 br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
 br_handle_frame+0x982/0x14c0 net/bridge/br_input.c:433
 __netif_receive_skb_core+0x10e1/0x4180 net/core/dev.c:5773
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 process_backlog+0x60e/0x14f0 net/core/dev.c:6352
 __napi_poll+0xc7/0x480 net/core/dev.c:7324
 napi_poll net/core/dev.c:7388 [inline]
 net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 do_softirq+0xec/0x180 kernel/softirq.c:480
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
 wg_packet_encrypt_worker+0x2dc/0x1720 drivers/net/wireguard/send.c:293
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
net_ratelimit: 9082 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)