INFO: task syz-executor.3:17321 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:27232 pid:17321 ppid: 3630 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5107 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6422 schedule+0xd2/0x1f0 kernel/sched/core.c:6494 io_schedule+0xba/0x130 kernel/sched/core.c:8609 bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0x121/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0xd5/0x110 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:69 [inline] lock_buffer include/linux/buffer_head.h:367 [inline] __sync_dirty_buffer+0x358/0x3f0 fs/buffer.c:3170 __ext4_handle_dirty_metadata+0x28d/0x720 fs/ext4/ext4_jbd2.c:382 ext4_convert_inline_data_nolock+0x6d3/0xf30 fs/ext4/inline.c:1255 ext4_convert_inline_data+0x31a/0x490 fs/ext4/inline.c:2025 ext4_fallocate+0x196/0x3fb0 fs/ext4/extents.c:4701 vfs_fallocate+0x487/0xe00 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xcf/0x140 fs/open.c:337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f934890e9 RSP: 002b:00007f9f9451b168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f9f9359bf60 RCX: 00007f9f934890e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c RBP: 00007f9f934e308d R08: 0000000000000000 R09: 0000000000000000 R10: 00000000004003fe R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecd92e88f R14: 00007f9f9451b300 R15: 0000000000022000 INFO: task syz-executor.3:17321 blocked for more than 143 seconds. Not tainted 5.18.0-rc2-next-20220414-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27232 pid:17321 ppid: 3630 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5107 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6422 schedule+0xd2/0x1f0 kernel/sched/core.c:6494 io_schedule+0xba/0x130 kernel/sched/core.c:8609 bit_wait_io+0x12/0xd0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0x121/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0xd5/0x110 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:69 [inline] lock_buffer include/linux/buffer_head.h:367 [inline] __sync_dirty_buffer+0x358/0x3f0 fs/buffer.c:3170 __ext4_handle_dirty_metadata+0x28d/0x720 fs/ext4/ext4_jbd2.c:382 ext4_convert_inline_data_nolock+0x6d3/0xf30 fs/ext4/inline.c:1255 ext4_convert_inline_data+0x31a/0x490 fs/ext4/inline.c:2025 ext4_fallocate+0x196/0x3fb0 fs/ext4/extents.c:4701 vfs_fallocate+0x487/0xe00 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xcf/0x140 fs/open.c:337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f934890e9 RSP: 002b:00007f9f9451b168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f9f9359bf60 RCX: 00007f9f934890e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c RBP: 00007f9f934e308d R08: 0000000000000000 R09: 0000000000000000 R10: 00000000004003fe R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecd92e88f R14: 00007f9f9451b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bd83d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 2 locks held by getty/3277: #0: ffff88801e0ca098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002e732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075 2 locks held by kworker/u4:8/6452: 4 locks held by kworker/u4:10/9312: 2 locks held by syz-executor.3/17321: #0: ffff888027d88460 (sb_writers#4){.+.+}-{0:0}, at: ksys_fallocate fs/open.c:331 [inline] #0: ffff888027d88460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_fallocate fs/open.c:339 [inline] #0: ffff888027d88460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_fallocate fs/open.c:337 [inline] #0: ffff888027d88460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_fallocate+0xcf/0x140 fs/open.c:337 #1: ffff88802b9dd108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:142 [inline] #1: ffff88802b9dd108 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x21e/0x490 fs/ext4/inline.c:2023 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.18.0-rc2-next-20220414-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:413 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6452 Comm: kworker/u4:8 Not tainted 5.18.0-rc2-next-20220414-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:341 [inline] RIP: 0010:rcu_is_watching+0x39/0xb0 kernel/rcu/tree.c:1138 Code: c7 c3 90 af 03 00 83 f8 07 89 c5 77 77 48 8d 3c ed e0 08 7b 8b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 51 48 03 1c ed e0 08 7b 8b 48 b8 00 00 00 00 00 fc ff df 48 89 RSP: 0018:ffffc90005bffb70 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 000000000003af90 RCX: ffffffff815e2f18 RDX: 1ffffffff16f611d RSI: 0000000000000002 RDI: ffffffff8b7b08e8 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8db7a057 R10: fffffbfff1b6f40a R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff8bd83d20 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e2d8662ce8 CR3: 000000000ba8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123 trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x480/0x570 kernel/locking/lockdep.c:5636 rcu_lock_acquire include/linux/rcupdate.h:269 [inline] rcu_read_lock include/linux/rcupdate.h:695 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:719 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ---------------- Code disassembly (best guess): 0: c7 c3 90 af 03 00 mov $0x3af90,%ebx 6: 83 f8 07 cmp $0x7,%eax 9: 89 c5 mov %eax,%ebp b: 77 77 ja 0x84 d: 48 8d 3c ed e0 08 7b lea -0x7484f720(,%rbp,8),%rdi 14: 8b 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 75 51 jne 0x7d <-- trapping instruction 2c: 48 03 1c ed e0 08 7b add -0x7484f720(,%rbp,8),%rbx 33: 8b 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: 89 .byte 0x89