INFO: task syz.0.14872:4993 blocked for more than 143 seconds. Not tainted 6.12.0-syzkaller-01518-ga5c93bfec0be #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.14872 state:D stack:23968 pid:4993 tgid:4991 ppid:5836 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x17fb/0x4be0 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 aio_write+0x56b/0x7c0 fs/aio.c:1633 io_submit_one+0x8a7/0x18a0 fs/aio.c:2052 __do_sys_io_submit fs/aio.c:2111 [inline] __se_sys_io_submit+0x171/0x2e0 fs/aio.c:2081 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: 0033:0x7f70ed37e759 RSP: 002b:00007f70ee1a2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f70ed535f80 RCX: 00007f70ed37e759 RDX: 00000000200001c0 RSI: 0000000000000001 RDI: 00007f70ee181000 RBP: 00007f70ed3f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f70ed535f80 R15: 00007ffcccabbf98 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e93a5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e93a5a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e93a5a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by getty/5588: #0: ffff8880355410a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by syz.4.14808/4858: #0: ffff88804f458d38 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x254/0x320 fs/file.c:1191 #1: ffff8880310b2420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2964 [inline] #1: ffff8880310b2420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x225/0xd30 fs/read_write.c:675 #2: ffff888079f7e488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #3: ffff88801d2e9788 (kn->active#61){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #4: ffffffff8e7ed3e8 (system_transition_mutex){+.+.}-{4:4}, at: software_resume+0x45/0x3d0 kernel/power/hibernate.c:989 3 locks held by syz.0.14872/4993: #0: ffff888027c94c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325 #1: ffff88801d2e83c8 (kn->active#63){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326 #2: ffffffff8e7ed3e8 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep kernel/power/main.c:56 [inline] #2: ffffffff8e7ed3e8 (system_transition_mutex){+.+.}-{4:4}, at: pm_test_store+0x95/0x320 kernel/power/main.c:291 2 locks held by syz.3.15080/5443: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 #1: ffffffff8e7ed3e8 (system_transition_mutex){+.+.}-{4:4}, at: lock_system_sleep+0x60/0xa0 kernel/power/main.c:56 1 lock held by syz.3.15080/5444: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.5.15082/5448: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz.2.15083/5451: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5453: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5455: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5457: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5459: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5461: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5464: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5466: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5468: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5470: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5472: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5481: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5483: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5486: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5488: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 1 lock held by syz-executor/5490: #0: ffffffff8f1849e8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x54/0x340 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-01518-ga5c93bfec0be #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:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-syzkaller-01518-ga5c93bfec0be #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5503 [inline] RIP: 0010:lock_release+0x1d4/0xa30 kernel/locking/lockdep.c:5870 Code: 24 b0 00 00 00 fa 48 c7 c7 60 db 0a 8c e8 e4 e3 50 0a 65 ff 05 ad fd 91 7e 48 8d 94 24 80 00 00 00 48 c1 ea 03 42 0f b6 04 3a <84> c0 0f 85 6e 05 00 00 c7 84 24 80 00 00 00 01 00 00 00 48 c7 c0 RSP: 0018:ffffc90000117a20 EFLAGS: 00000802 RAX: 0000000000000004 RBX: 0000000000000246 RCX: ffffffff81708bc0 RDX: 1ffff92000022f54 RSI: ffffffff8c0adb60 RDI: ffffffff8c605020 RBP: ffffc90000117b48 R08: ffffffff901c6537 R09: 1ffffffff2038ca6 R10: dffffc0000000000 R11: fffffbfff2038ca7 R12: 1ffff92000022f50 R13: ffffffff8b8b210b R14: ffffc90000117ad0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563853cd2088 CR3: 000000000e736000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:347 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x28b/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 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