INFO: task syz-executor.4:21152 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27096 21152 8167 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 IPVS: ftp: loaded support on port[0] = 21 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:1246 ext4_convert_inline_data+0x347/0x3a0 fs/ext4/inline.c:2033 ext4_fallocate+0x137/0x2150 fs/ext4/extents.c:4962 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: 0033:0x7faf08bba0c9 Code: Bad RIP value. RSP: 002b:00007faf0712c168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007faf08cd9f80 RCX: 00007faf08bba0c9 RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000004 RBP: 00007faf08c15ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000020000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0309b69f R14: 00007faf0712c300 R15: 0000000000022000 INFO: task syz-executor.2:21213 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29376 21213 8153 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:748 [inline] do_last fs/namei.c:3324 [inline] path_openat+0x1071/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f48c45d20c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f48be723168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f48c46f2050 RCX: 00007f48c45d20c9 RDX: 000000000000275a RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f48c462dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffedac954bf R14: 00007f48be723300 R15: 0000000000022000 INFO: task syz-executor.2:21214 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29104 21214 8153 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:748 [inline] do_last fs/namei.c:3324 [inline] path_openat+0x1071/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f48c45d20c9 Code: Bad RIP value. RSP: 002b:00007f48be702168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f48c46f2120 RCX: 00007f48c45d20c9 RDX: 00000000000026e1 RSI: 0000000020000240 RDI: ffffffffffffff9c RBP: 00007f48c462dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffedac954bf R14: 00007f48be702300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000323bb333 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7894: #0: 000000004b87ce42 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by agetty/8047: #0: 000000002817b7d1 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000008564c6f2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 4 locks held by kworker/u4:5/8844: #0: 0000000060559e7c ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000002393c5e6 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000641d048c (&type->s_umount_key#61){++++}, at: trylock_super+0x1d/0x100 fs/super.c:412 #3: 00000000ca0bde20 (&sbi->gc_mutex){+.+.}, at: f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512 2 locks held by kworker/1:2/9325: #0: 00000000f9258769 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000008e66a41a ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 3 locks held by kworker/1:3/1311: #0: 0000000039e1c0b6 ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000be797927 ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000002c65add4 (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 4 locks held by kworker/u4:9/12807: #0: 0000000092c1f6f4 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000094c570cb (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000b0ea6830 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 #3: 00000000c8b73eb3 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #3: 00000000c8b73eb3 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 2 locks held by syz-executor.4/21152: #0: 000000008f6b2f3b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000008f6b2f3b (sb_writers#3){.+.+}, at: vfs_fallocate+0x7c0/0x9a0 fs/open.c:307 #1: 000000009cafcad5 (&ei->xattr_sem){++++}, at: ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: 000000009cafcad5 (&ei->xattr_sem){++++}, at: ext4_convert_inline_data+0x20a/0x3a0 fs/ext4/inline.c:2031 3 locks held by syz-executor.2/21185: 2 locks held by syz-executor.2/21213: #0: 00000000280c47cd (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000280c47cd (sb_writers#19){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: do_last fs/namei.c:3324 [inline] #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: path_openat+0x1071/0x2df0 fs/namei.c:3537 2 locks held by syz-executor.2/21214: #0: 00000000280c47cd (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000280c47cd (sb_writers#19){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: do_last fs/namei.c:3324 [inline] #1: 00000000660b8c6d (&type->i_mutex_dir_key#9){+.+.}, at: path_openat+0x1071/0x2df0 fs/namei.c:3537 1 lock held by syz-executor.0/27007: #0: 000000002c65add4 (rtnl_mutex){+.+.}, at: netdev_run_todo+0x719/0xab0 net/core/dev.c:9005 1 lock held by syz-executor.5/27016: #0: 000000009f81f747 (rcu_preempt_state.barrier_mutex){+.+.}, at: _rcu_barrier+0x59/0x3e0 kernel/rcu/tree.c:3430 4 locks held by syz-executor.1/27032: #0: 00000000b0ea6830 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 000000002c65add4 (rtnl_mutex){+.+.}, at: caif_exit_net+0x38/0x450 net/caif/caif_dev.c:522 #2: 0000000098a79092 (&caifn->caifdevs.lock){+.+.}, at: caif_exit_net+0x4f/0x450 net/caif/caif_dev.c:523 #3: 00000000c8b73eb3 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #3: 00000000c8b73eb3 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4681 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0033:0x7f10f61b6c3a Code: 08 41 89 cc 0f 87 b6 02 00 00 89 c8 41 89 d5 4c 89 cb 4c 8b 7c c5 18 4d 85 ff 0f 84 a0 00 00 00 41 3b 4f 08 0f 85 f6 02 00 00 <4d> 8b 4f 10 4d 85 c9 0f 84 89 00 00 00 4c 8b 44 24 70 4c 89 cf 48 RSP: 002b:00007ffdb1487320 EFLAGS: 00000246 RAX: 0000000000000006 RBX: 000000000013b8c0 RCX: 0000000000000006 RDX: 0000000000000003 RSI: 0000000000000010 RDI: 0000000000000002 RBP: 00005637d3d2c040 R08: 0000000000000000 R09: 000000000013b8c0 R10: 5aba55b6349fcb07 R11: c5f910a3100a81e4 R12: 0000000000000006 R13: 0000000000000003 R14: 0000000000000010 R15: 00005637d3d30420 FS: 00007f10f657e8c0 GS: 0000000000000000 IPVS: ftp: loaded support on port[0] = 21