INFO: task syz-executor.5:6314 blocked for more than 145 seconds.
      Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:26288 pid:6314  ppid:5087   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 io_schedule+0xbe/0x130 kernel/sched/core.c:9026
 folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
 folio_lock include/linux/pagemap.h:1042 [inline]
 clean_bdev_aliases+0x56b/0x610 fs/buffer.c:1725
 clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
 __block_write_begin_int+0x8d6/0x1470 fs/buffer.c:2115
 iomap_write_begin+0x5be/0x17b0 fs/iomap/buffered-io.c:772
 iomap_write_iter fs/iomap/buffered-io.c:907 [inline]
 iomap_file_buffered_write+0x3d6/0x9a0 fs/iomap/buffered-io.c:968
 blkdev_buffered_write block/fops.c:634 [inline]
 blkdev_write_iter+0x4f5/0xc90 block/fops.c:684
 call_write_iter include/linux/fs.h:1985 [inline]
 do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735
 do_iter_write+0x17f/0x830 fs/read_write.c:860
 vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
 iter_file_splice_write+0x698/0xbf0 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0x118/0x180 fs/splice.c:1142
 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1088
 do_splice_direct+0x1af/0x280 fs/splice.c:1194
 do_sendfile+0xb88/0x1390 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f047f07cae9
RSP: 002b:00007f047fced0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f047f19c120 RCX: 00007f047f07cae9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007f047f0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f047f19c120 R15: 00007ffc09f52498
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/1:0/22:
1 lock held by khungtaskd/28:
 #0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
3 locks held by udevd/4486:
2 locks held by getty/4791:
 #0: ffff88814bae40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900020582f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
2 locks held by syz-executor.4/5086:
2 locks held by udevd/5184:
 #0: ffff8880b993c758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
 #1: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #1: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #1: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2305 [inline]
 #1: ffffffff8cba7960 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x107/0x450 kernel/trace/bpf_trace.c:2347
2 locks held by kworker/0:8/5214:
 #0: ffff888012c7b938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc900034dfd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
2 locks held by syz-executor.5/7228:
2 locks held by syz-executor.3/7242:
 #0: ffffffff8cc17e88 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_unregister+0x9c/0xd20 kernel/tracepoint.c:548
 #1: ffffffff8cbb3238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #1: ffffffff8cbb3238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992
1 lock held by syz-executor.1/7246:
 #0: ffffffff8cc17e88 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_unregister+0x9c/0xd20 kernel/tracepoint.c:548
1 lock held by syz-executor.2/7255:
 #0: ffffffff8cc17e88 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_register_prio_may_exist+0x9c/0x100 kernel/tracepoint.c:478
3 locks held by syz-executor.2/7262:
 #0: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline]
 #0: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x36f/0xdf0 net/core/rtnetlink.c:6441
 #1: ffff88806fbf93e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x1fe/0x4d0 drivers/net/wireguard/device.c:50
 #2: ffffffff8cbb3238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #2: ffffffff8cbb3238 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x404/0x7e0 kernel/rcu/tree_exp.h:992
2 locks held by syz-executor.2/7263:
 #0: ffffffff8e5e2a90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d5/0x670 net/core/net_namespace.c:487
 #1: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
 #1: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x230 net/smc/smc_pnet.c:878
6 locks held by syz-executor.4/7269:
 #0: ffff888087a8e888 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x170 fs/file.c:1064
 #1: ffff8880221e6410 (sb_writers#11){.+.+}-{0:0}, at: do_writev+0x137/0x370 fs/read_write.c:976
 #2: ffff888081258888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x610 fs/kernfs/file.c:325
 #3: ffffffff8cbf2928 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:369 [inline]
 #3: ffffffff8cbf2928 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0x136/0x570 kernel/cgroup/cgroup.c:1645
 #4: ffffffff8ca4c870 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2382 [inline]
 #4: ffffffff8ca4c870 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_procs_write_start+0x18f/0x660 kernel/cgroup/cgroup.c:2886
 #5: ffffffff8cbf26f0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2384 [inline]
 #5: ffffffff8cbf26f0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2380 [inline]
 #5: ffffffff8cbf26f0 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_procs_write_start+0x19b/0x660 kernel/cgroup/cgroup.c:2886
3 locks held by syz-executor.4/7276:
 #0: ffff8880779fa410 (sb_writers#12){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:3882
 #1: ffff888087218150 (&type->i_mutex_dir_key#7/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
 #1: ffff888087218150 (&type->i_mutex_dir_key#7/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:3889
 #2: ffffffff8cbf2928 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:369 [inline]
 #2: ffffffff8cbf2928 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0x136/0x570 kernel/cgroup/cgroup.c:1645
1 lock held by syz-executor.0/7274:
 #0: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline]
 #0: ffffffff8e5f7b28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x36f/0xdf0 net/core/rtnetlink.c:6441
1 lock held by syz-executor.5/7282:
 #0: ffffffff8cc17e88 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_register_prio_may_exist+0x9c/0x100 kernel/tracepoint.c:478

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7262 Comm: syz-executor.2 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:unwind_next_frame+0xea5/0x2390 arch/x86/kernel/unwind_orc.c:641
Code: 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 71 14 00 00 45 0f b6 74 24 04 48 c7 c6 80 ce 89 8a 41 c0 ee 04 41 0f b6 fe <e8> e6 6a 4c 00 41 80 fe 01 0f 84 6c 0b 00 00 41 80 fe 04 0f 84 2c
RSP: 0018:ffffc900003f8938 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffffc900003f8a10 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8a89ce80 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 1ffff110107b812e R12: ffffffff8f53c974
R13: ffffc900003f8ab0 R14: 0000000000000001 R15: 0000000000000001
FS:  00007f321c6806c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0221dd000 CR3: 000000002696d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __unwind_start+0x5a4/0x880 arch/x86/kernel/unwind_orc.c:760
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xaf/0x170 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:164 [inline]
 __cache_free mm/slab.c:3370 [inline]
 __do_kmem_cache_free mm/slab.c:3557 [inline]
 kmem_cache_free+0x104/0x380 mm/slab.c:3582
 i_callback+0x43/0x70 fs/inode.c:248
 rcu_do_batch kernel/rcu/tree.c:2139 [inline]
 rcu_core+0x805/0x1bb0 kernel/rcu/tree.c:2403
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1979 [inline]
RIP: 0010:vprintk_emit+0x3aa/0x5f0 kernel/printk/printk.c:2306
Code: 00 4d 85 e4 0f 85 e4 01 00 00 e8 d1 5e 1c 00 9c 5d 81 e5 00 02 00 00 31 ff 48 89 ee e8 4f 5a 1c 00 48 85 ed 0f 85 f0 01 00 00 <e8> b1 5e 1c 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00
RSP: 0018:ffffc9000497f0a0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000024 RCX: ffffc9000aa23000
RDX: 0000000000040000 RSI: ffffffff816a6884 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0a65646f6d207375 R12: 0000000000000200
R13: ffff888013ea0080 R14: ffffffff8ba2e2c0 R15: ffffc9000497f120
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2332
 __netdev_printk+0x312/0x480 net/core/dev.c:11332
 netdev_info+0xe5/0x120 net/core/dev.c:11379
 __dev_set_promiscuity+0x177/0x580 net/core/dev.c:8388
 __dev_change_flags+0x2df/0x730 net/core/dev.c:8606
 rtnl_configure_link+0xfe/0x260 net/core/rtnetlink.c:3296
 rtnl_newlink_create net/core/rtnetlink.c:3493 [inline]
 __rtnl_newlink+0x11ab/0x1940 net/core/rtnetlink.c:3705
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3718
 rtnetlink_rcv_msg+0x3c4/0xdf0 net/core/rtnetlink.c:6444
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:753
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2541
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2595
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2624
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f321b87cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f321c6800c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f321b99c120 RCX: 00007f321b87cae9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000007
RBP: 00007f321b8c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f321b99c120 R15: 00007fff7b79be08
 </TASK>