INFO: task syz.2.418:7299 blocked for more than 143 seconds. Not tainted 6.12.0-next-20241119-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.418 state:D stack:26008 pid:7299 tgid:7298 ppid:5832 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735 lock_system_sleep kernel/power/main.c:56 [inline] pm_test_store+0x95/0x320 kernel/power/main.c:291 kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334 iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1164 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x564/0x8a0 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1418 [inline] __se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1410 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: 0033:0x7fe18237e759 RSP: 002b:00007fe183165038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fe182535f80 RCX: 00007fe18237e759 RDX: 0000000020002700 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007fe1823f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe182535f80 R15: 00007fffc1ceb368 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by kworker/u8:4/66: #0: ffff8880b873e8d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 #1: ffffc9000216fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000216fd00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 2 locks held by getty/5583: #0: ffff8880316ef0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002fbe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by syz.4.405/7221: #0: ffff888079ee82b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x254/0x320 fs/file.c:1191 #1: ffff88803579c420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2964 [inline] #1: ffff88803579c420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd30 fs/read_write.c:675 #2: ffff8880232d9488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #3: ffff88801daab878 (kn->active#60){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #4: ffffffff8e7eba88 (system_transition_mutex){+.+.}-{4:4}, at: software_resume+0x45/0x3d0 kernel/power/hibernate.c:992 4 locks held by syz.2.418/7299: #0: ffff88803579c420 (sb_writers#8){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163 #1: ffff88807b7fe488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #2: ffff88801daaa4b8 (kn->active#62){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #3: ffffffff8e7eba88 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep kernel/power/main.c:56 [inline] #3: ffffffff8e7eba88 (system_transition_mutex){+.+.}-{4:4}, at: pm_test_store+0x95/0x320 kernel/power/main.c:291 2 locks held by syz.6.1180/9562: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 #1: ffffffff8e7eba88 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep+0x60/0xa0 kernel/power/main.c:56 1 lock held by syz.6.1180/9565: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.1.1185/9585: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.8.1193/9632: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.7.1205/9667: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.5.1234/9735: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/9738: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/9740: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/9747: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/9750: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/9752: #0: ffffffff8f171928 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-next-20241119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 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:234 [inline] watchdog+0xffb/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 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: 5193 Comm: klogd Not tainted 6.12.0-next-20241119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:unix_remove_socket net/unix/af_unix.c:406 [inline] RIP: 0010:unix_release_sock+0xc6/0xd00 net/unix/af_unix.c:677 Code: e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 e3 d2 a5 f7 bb d0 04 00 00 49 03 1f 48 89 d8 48 c1 e8 03 48 89 44 24 28 42 80 3c 20 00 <74> 08 48 89 df e8 c0 d2 a5 f7 4c 8b 3b 49 8d 4e 08 48 89 c8 48 89 RSP: 0018:ffffc90003247d00 EFLAGS: 00000246 RAX: 1ffffffff34ed082 RBX: ffffffff9a768410 RCX: ffff88807c611e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003247d70 RBP: ffffc90003247dd0 R08: ffffc90003247d6f R09: 0000000000000000 R10: ffffc90003247d60 R11: fffff52000648fae R12: dffffc0000000000 R13: 1ffff110099849c3 R14: ffff88805ea4a100 R15: ffff88805ea4a130 FS: 00007f2f30e02380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f18cc144a54 CR3: 0000000034b54000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unix_release+0x91/0xc0 net/unix/af_unix.c:1109 __sock_release net/socket.c:640 [inline] sock_close+0xbc/0x240 net/socket.c:1408 __fput+0x23c/0xa50 fs/file_table.c:450 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1539 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: 0033:0x7f2f30f570a8 Code: 48 8b 05 83 9d 0d 00 64 c7 00 16 00 00 00 83 c8 ff 48 83 c4 20 5b c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 5b 48 8b 15 51 9d 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffc61a50c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: ffffffffffffff80 RCX: 00007f2f30f570a8 RDX: ffffffffffffff80 RSI: 00007f2f30ff0bc0 RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000000 R09: 8dd4d8df765e3662 R10: 0000000000000008 R11: 0000000000000246 R12: 00007f2f30ff0bc0 R13: 000000000000006f R14: 000000000000006f R15: 0000000000000000