INFO: task klogd:4511 blocked for more than 143 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:klogd state:D stack:23800 pid:4511 tgid:4511 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fdb34ad29b5 RSP: 002b:00007fff798f5898 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdb34ad29b5 RDX: 000000000000006e RSI: 00005600e6316e70 RDI: 0000000000000003 RBP: 00005600e630f910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013 R13: 00007fdb34c60212 R14: 00007fff798f5998 R15: 0000000000000000 INFO: task dhcpcd:4735 blocked for more than 143 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:23664 pid:4735 tgid:4735 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f0324e20bf2 RSP: 002b:00007ffed4dcf318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000055cfeaf26df0 RCX: 00007f0324e20bf2 RDX: 0000000000000047 RSI: 00007ffed4dcf330 RDI: 0000000000000005 RBP: 00007ffed4dcf330 R08: 0000000000000008 R09: 0000000000000036 R10: 0000000000000000 R11: 0000000000000246 R12: 000055cfe9108efc R13: 00007ffed4dcf760 R14: 000055cfeb000bb0 R15: 0000000000000001 INFO: task udevd:14141 blocked for more than 144 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25200 pid:14141 tgid:14141 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: c00008dd7d61a82f R10: 0000000000000010 R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 INFO: task udevd:14163 blocked for more than 145 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:24536 pid:14163 tgid:14163 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: 0000000000000000 R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 INFO: task udevd:14203 blocked for more than 145 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25168 pid:14203 tgid:14203 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: c00008dd7d61a82f R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 INFO: task udevd:14293 blocked for more than 146 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25648 pid:14293 tgid:14293 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: c00008dd7d61a82f R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 INFO: task udevd:15647 blocked for more than 146 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25648 pid:15647 tgid:15647 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: 0000000000000000 R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 INFO: task udevd:15669 blocked for more than 147 seconds. Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25528 pid:15669 tgid:15669 ppid:4522 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 call_write_iter include/linux/fs.h:2085 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa81/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb1bd916bf2 RSP: 002b:00007ffcbeae72f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb1bd916bf2 RDX: 0000000000000000 RSI: 00007ffcbeae734f RDI: 000000000000000a RBP: 00007ffcbeae734f R08: 0000000000000001 R09: c00008dd7d61a82f R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a R13: 00007fb1bdd77ae0 R14: 0000000000000000 R15: 000055bf4fd1c910 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by kworker/u4:5/144: 2 locks held by getty/4824: #0: ffff88802af5d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/1:3/5145: #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004497d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004497d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f374f88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 2 locks held by kworker/1:4/5151: #0: ffff888014c8e938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8e938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90003ce7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90003ce7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 2 locks held by kworker/u4:12/5249: 1 lock held by syz-executor.0/16825: 2 locks held by syz-executor.3/17477: #0: ffffffff8f374f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f374f88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6612 #1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 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:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16825 Comm: syz-executor.0 Not tainted 6.8.0-rc3-syzkaller-00136-g1f719a2f3fa6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70 kernel/kcov.c:207 Code: 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d c0 57 70 7e 65 8b 15 c1 57 70 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00 RSP: 0018:ffffc9000506fa58 EFLAGS: 00000283 RAX: ffffffff8a08e5c6 RBX: ffff88801ffe8f70 RCX: ffff88802a300000 RDX: 0000000080000000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc9000506fbd0 R08: ffffffff92c894bf R09: 1ffffffff2591297 R10: dffffc0000000000 R11: fffffbfff2591298 R12: ffff88801ffe8e40 R13: 1ffff11003ffd1ee R14: 0000000000000000 R15: ffffffff8f479060 FS: 0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000f5eefb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73e3028 CR3: 00000000799a4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unix_gc+0x1086/0x1350 net/unix/garbage.c:318 unix_release_sock+0xadd/0xd20 net/unix/af_unix.c:683 unix_release+0x91/0xc0 net/unix/af_unix.c:1064 __sock_release net/socket.c:659 [inline] sock_close+0xbc/0x240 net/socket.c:1421 __fput+0x429/0x8a0 fs/file_table.c:376 task_work_run+0x24e/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:108 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x167/0x370 kernel/entry/common.c:212 __do_fast_syscall_32+0xcf/0x120 arch/x86/entry/common.c:324 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7c/0x86 RIP: 0023:0xf72f5579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5eef5ac EFLAGS: 00000206 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00000000ffffffff RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000