INFO: task syz-executor.0:10508 blocked for more than 143 seconds. Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26768 pid:10508 tgid:10507 ppid:5114 flags:0x00004006 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 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1ae/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:847 [inline] blkdev_fallocate+0x22a/0x580 block/fops.c:800 vfs_fallocate+0x564/0x6c0 fs/open.c:328 ksys_fallocate fs/open.c:351 [inline] __do_sys_fallocate fs/open.c:359 [inline] __se_sys_fallocate fs/open.c:357 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:357 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f68eb87dda9 RSP: 002b:00007f68ec6c40c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f68eb9abf80 RCX: 00007f68eb87dda9 RDX: 0000000004000000 RSI: 0000000000000010 RDI: 0000000000000004 RBP: 00007f68eb8ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008800 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f68eb9abf80 R15: 00007f68ebacfa48 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by kworker/u4:9/1101: 2 locks held by klogd/4511: 2 locks held by getty/4828: #0: ffff88802b2440a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.1/10502: 1 lock held by syz-executor.0/10508: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.1/11144: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.0/11195: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.1/11755: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.0/11786: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.1/12351: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 1 lock held by syz-executor.0/12386: #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff88801d0a94c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x22a/0x580 block/fops.c:800 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 28843 Comm: kworker/u4:23 Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:check_preemption_disabled+0x14/0x120 lib/smp_processor_id.c:13 Code: 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 08 65 8b 1d 8c f2 9c 74 65 8b 05 81 f2 9c 74 a9 ff ff RSP: 0018:ffffc90015c5f968 EFLAGS: 00000082 RAX: 802dc6cfb516f200 RBX: ffff888043ad0000 RCX: ffffffff94484303 RDX: dffffc0000000000 RSI: ffffffff8baac340 RDI: ffffffff8bfe6da0 RBP: ffffc90015c5fa48 R08: ffffffff8f85672f R09: 1ffffffff1f0ace5 R10: dffffc0000000000 R11: fffffbfff1f0ace6 R12: dffffc0000000000 R13: 1ffff92002b8bf4c R14: 36157a782e92833a R15: 1ffff92002b8bf38 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c001920000 CR3: 000000000df32000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline] lockdep_hardirqs_on_prepare+0x1f8/0x780 kernel/locking/lockdep.c:4358 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x8f/0x140 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] skb_dequeue+0x113/0x150 net/core/skbuff.c:3727 ieee80211_iface_work+0xa95/0xd90 net/mac80211/iface.c:1650 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 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