EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue INFO: task syz-executor754:8099 blocked for more than 140 seconds. Not tainted 4.19.191-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor754 D26800 8099 8097 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 io_schedule+0xb5/0x120 kernel/sched/core.c:5181 bit_wait_io+0x12/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit_lock+0xb5/0x170 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xd2/0x100 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x52/0x60 fs/buffer.c:65 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x2a6/0x320 fs/buffer.c:3178 __ext4_handle_dirty_metadata+0x234/0x590 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x5c9/0xd10 fs/ext4/inline.c:1240 ext4_convert_inline_data+0x347/0x3a0 fs/ext4/inline.c:2027 ext4_punch_hole+0x1e0/0x11f0 fs/ext4/inode.c:4305 ext4_fallocate+0x3f8/0x2150 fs/ext4/extents.c:4954 vfs_fallocate+0x487/0x9a0 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_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4448e9 Code: Bad RIP value. RSP: 002b:00007ffc36af8408 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004448e9 RDX: 0000000000000000 RSI: 0000000100000003 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00000000004b0080 R09: 00000000004b0080 R10: 00000000008001a0 R11: 0000000000000246 R12: 00007ffc36af8430 R13: 0000000000000000 R14: 431bde82d7b634db R15: 00000000004004a0 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000ff865745 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7851: #0: 00000000efe8503a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by syz-executor754/8099: #0: 00000000ba6b7646 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000ba6b7646 (sb_writers#3){.+.+}, at: vfs_fallocate+0x7c0/0x9a0 fs/open.c:307 #1: 000000002d960d34 (&ei->i_mmap_sem){++++}, at: ext4_punch_hole+0x1d8/0x11f0 fs/ext4/inode.c:4304 #2: 0000000068ffe1e9 (&ei->xattr_sem){++++}, at: ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #2: 0000000068ffe1e9 (&ei->xattr_sem){++++}, at: ext4_convert_inline_data+0x20a/0x3a0 fs/ext4/inline.c:2025 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.191-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4677 Comm: systemd-journal Not tainted 4.19.191-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_hardirqs_off+0x69/0x200 kernel/trace/trace_preemptirq.c:44 Code: ff 89 de e8 69 d6 fa ff 85 db 75 14 e8 f0 d4 fa ff 4c 8b 6c 24 28 0f 1f 44 00 00 e8 e1 d4 fa ff e8 dc d4 fa ff 48 8b 7c 24 28 <5b> 5d 41 5c 41 5d 41 5e e9 6a af e3 ff e8 c5 d4 fa ff 65 8b 1d be RSP: 0018:ffff8880a1947a88 EFLAGS: 00000093 RAX: ffff8880a193c1c0 RBX: 0000000000000000 RCX: ffffffff8167a137 RDX: 0000000000000000 RSI: ffffffff8167a154 RDI: ffffffff81a54885 RBP: ffff8880a1947b20 R08: ffffffff8cd3d398 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff81a54885 R14: 0000000000000293 R15: 0000000000000536 FS: 00007fe75c2448c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe759614000 CR3: 00000000a19d9000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] set_root+0x115/0x5f0 fs/namei.c:818 path_init+0x1057/0x19d0 fs/namei.c:2208 path_lookupat+0x97/0x8d0 fs/namei.c:2309 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x248/0x7a0 fs/open.c:397 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fe75b4ff9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff6fb4b468 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fff6fb4e490 RCX: 00007fe75b4ff9c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000556069dc79a3 RBP: 00007fff6fb4b5b0 R08: 0000556069dbd3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000556069e4f8a0 R15: 00007fff6fb4baa0