INFO: task syz-executor.2:11588 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-00220-gffb4d94b4314 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27992 pid:11588 ppid: 11575 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x91f/0xdf0 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0xf1c/0x1350 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1553 filemap_invalidate_lock include/linux/fs.h:801 [inline] blkdev_fallocate+0x21f/0x390 block/fops.c:641 vfs_fallocate+0x515/0x670 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3e3328a5a9 RSP: 002b:00007f3e344d3168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f3e333abf80 RCX: 00007f3e3328a5a9 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 00007f3e332e5580 R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc60043a1f R14: 00007f3e344d3300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cb233f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cb23bf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/29: #0: ffffffff8cb23220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:5/1042: 2 locks held by getty/3285: #0: ffff88814b273098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.2/11474: 1 lock held by syz-executor.2/11588: #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor.2/11637: #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor.5/11682: #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor.2/11712: #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801bb84ac0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-00220-gffb4d94b4314 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 nmi_cpu_backtrace+0x425/0x450 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3641 Comm: syz-fuzzer Not tainted 6.0.0-rc7-syzkaller-00220-gffb4d94b4314 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0033:0x40c99f Code: 42 08 4c 89 c1 49 29 f0 49 8d 1c 00 48 85 c0 b8 00 00 00 00 48 0f 45 c3 eb 07 48 8b 42 08 4c 89 c1 48 8b 5c 24 40 48 01 43 08 <49> 89 c1 48 89 c8 48 89 44 24 38 4c 89 4c 24 30 e8 8c 7e 05 00 45 RSP: 002b:000000c020c22ed0 EFLAGS: 00000212 RAX: 0000000000000048 RBX: 00007f0f85a79108 RCX: 0000000000000050 RDX: 000000000069e800 RSI: 0000000000000050 RDI: 0000000000000000 RBP: 000000c020c22f40 R08: 0000000000000050 R09: 0000000000000050 R10: 000000000000000c R11: 0000000000875a0a R12: 0000000000203009 R13: 0000000000203009 R14: 000000c00026da00 R15: 00007f0f55a7c1ff FS: 000000c00c06d490 GS: 0000000000000000