INFO: task syz-executor.4:734 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 print_req_error: I/O error, dev loop5, sector 108 buffer_io_error: 110 callbacks suppressed Buffer I/O error on dev loop5p1, logical block 8, async page read print_req_error: I/O error, dev loop5, sector 109 Buffer I/O error on dev loop5p1, logical block 9, async page read print_req_error: I/O error, dev loop5, sector 58 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. print_req_error: I/O error, dev loop5, sector 110 Buffer I/O error on dev loop5p1, logical block 10, async page read print_req_error: I/O error, dev loop5, sector 111 Buffer I/O error on dev loop5p1, logical block 11, async page read print_req_error: I/O error, dev loop5, sector 112 Buffer I/O error on dev loop5p1, logical block 12, async page read syz-executor.4 D30024 734 8149 0x00000004 print_req_error: I/O error, dev loop5, sector 1008 Call Trace: print_req_error: I/O error, dev loop5, sector 113 Buffer I/O error on dev loop5p1, logical block 13, async page read print_req_error: I/O error, dev loop5, sector 1008 Buffer I/O error on dev loop5p3, logical block 8, async page read Buffer I/O error on dev loop5p3, logical block 9, async page read Buffer I/O error on dev loop5p3, logical block 10, async page read Buffer I/O error on dev loop5p3, logical block 11, async page read context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 __ia32_sys_sync+0xa/0x10 fs/sync.c:124 team0: Port device bridge3715 added do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ffbab26f0c9 Code: Bad RIP value. RSP: 002b:00007ffba97e1168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007ffbab38ef80 RCX: 00007ffbab26f0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffbab2caae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4e7b1e0f R14: 00007ffba97e1300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 0000000073053d53 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by systemd-udevd/4707: 1 lock held by in:imklog/7800: #0: 00000000b09bf9eb (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 6 locks held by syz-executor.1/17226: 3 locks held by kworker/1:0/3076: team0: Port device bridge3716 added #0: 00000000a355ed1a (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000a355ed1a (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 0000000073053d53 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 0000000073053d53 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 0000000048bf0772 (&base->lock){-.-.}, at: lock_timer_base+0x55/0x1b0 kernel/time/timer.c:950 1 lock held by syz-executor.4/734: #0: 0000000009a679b5 (&type->s_umount_key#85){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.5/8181: 2 locks held by syz-executor.0/8191: #0: 00000000813c8054 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000813c8054 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598 #1: 00000000e3e9fbe2 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: 00000000e3e9fbe2 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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: 17226 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109 Code: 3d cc 17 3d 0b 01 7f 02 5d c3 89 ef 5d e9 f5 fe c9 06 48 c7 c7 00 97 65 8c e8 84 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffff8880ba107e98 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89cfb1a0 RCX: 0000000000000020 RDX: 1ffffffff139f636 RSI: 0000000000034d3c RDI: 0000000000000380 RBP: ffff8880ba11e2c0 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66505b R12: 0000000000034d3c R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30 FS: 00007f47bb90c700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005641a06a78e0 CR3: 000000008d553000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:389 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460 clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__find_get_block+0x284/0xde0 fs/buffer.c:1293 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 64 0a 00 00 48 83 3d 96 0b 41 08 00 0f 84 bf 04 00 00 e8 63 0e b2 ff fb 66 0f 1f 44 00 00 <4d> 85 e4 0f 84 52 02 00 00 e8 4e 0e b2 ff 0f 1f 44 00 00 e8 44 0e RSP: 0018:ffff88803548f5a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000010 RCX: ffffc9000720f000 RDX: 0000000000040000 RSI: ffffffff81b0770d RDI: ffff88809f866884 RBP: 000000000000000f R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000138 R14: 0000000000000128 R15: ffff8880897167e0 flush_commit_list.isra.0+0xb17/0x1e20 fs/reiserfs/journal.c:1058 flush_journal_list.isra.0+0x24e/0x1e60 fs/reiserfs/journal.c:1395 flush_used_journal_lists.isra.0+0x330/0x580 fs/reiserfs/journal.c:1837 do_journal_end+0x325a/0x4840 fs/reiserfs/journal.c:4357 do_journal_begin_r+0x9f8/0x10b0 fs/reiserfs/journal.c:3125 journal_begin+0x162/0x400 fs/reiserfs/journal.c:3265 reiserfs_fill_super+0x1a81/0x2d80 fs/reiserfs/super.c:2117 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f47bd39b5fa Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f47bb90bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000110a RCX: 00007f47bd39b5fa RDX: 0000000020001100 RSI: 0000000020000180 RDI: 00007f47bb90bfe0 RBP: 00007f47bb90c020 R08: 00007f47bb90c020 R09: 0000000000000080 R10: 0000000000000080 R11: 0000000000000202 R12: 0000000020001100 R13: 0000000020000180 R14: 00007f47bb90bfe0 R15: 0000000020000000