IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 INFO: task syz-executor2:8375 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #264 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D17328 8375 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] vfs_unlink+0xd1/0x510 fs/namei.c:3991 do_unlinkat+0x6cc/0xa30 fs/namei.c:4063 __do_sys_unlink fs/namei.c:4110 [inline] __se_sys_unlink fs/namei.c:4108 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4108 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4572c7 Code: 76 29 48 83 ec 10 48 89 6c 24 08 48 8d 6c 24 08 48 8b 42 08 48 8b 40 08 48 89 04 24 e8 02 d3 fc ff 48 8b 6c 24 08 48 83 c4 10 e8 e3 2b 00 00 eb c1 cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 RSP: 002b:00007ffefcbbdee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004572c7 RDX: 00007ffefcbbdf00 RSI: 00007ffefcbbdf00 RDI: 00007ffefcbbdf90 RBP: 0000000000002a53 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000005 R11: 0000000000000246 R12: 00007ffefcbbf020 R13: 00000000017e4940 R14: 0000000000000000 R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/983: #0: 00000000c5f39c2c (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 2 locks held by getty/5352: #0: 00000000f8a7478c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000eb7c337a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5353: #0: 00000000ee377f5b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000674a5392 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5354: #0: 00000000e4acdbb2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002d3e0795 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5355: #0: 00000000be206c48 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000055bfbf1f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5356: #0: 00000000ed8aebee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003ac06a5e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5357: #0: 00000000508c0846 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e4539f1c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5358: #0: 000000006e0a6f9d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000001b170542 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 3 locks held by syz-executor2/8375: #0: 00000000d119517a (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000d119517a (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 00000000d24dff6c (&type->i_mutex_dir_key#3/1){+.+.}, at: inode_lock_nested include/linux/fs.h:773 [inline] #1: 00000000d24dff6c (&type->i_mutex_dir_key#3/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4049 #2: 00000000e35fdb9b (&sb->s_type->i_mutex_key#10){++++}, at: inode_lock include/linux/fs.h:738 [inline] #2: 00000000e35fdb9b (&sb->s_type->i_mutex_key#10){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:3991 2 locks held by syz-executor2/10485: #0: 00000000d119517a (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2759 [inline] #0: 00000000d119517a (sb_writers#3){.+.+}, at: vfs_write+0x42a/0x560 fs/read_write.c:548 #1: 00000000e35fdb9b (&sb->s_type->i_mutex_key#10){++++}, at: inode_trylock include/linux/fs.h:758 [inline] #1: 00000000e35fdb9b (&sb->s_type->i_mutex_key#10){++++}, at: ext4_file_write_iter+0x2a1/0x1420 fs/ext4/file.c:232 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc6+ #264 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+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.036 msecs NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc6+ #264 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:778 [inline] RIP: 0010:debug_check_no_obj_freed+0x1c0/0x58d lib/debugobjects.c:818 Code: ff ff 48 c7 c0 20 4a fc 8a 4c 8b 2c 30 4d 85 ed 0f 84 87 02 00 00 31 f6 4d 89 e7 41 89 f4 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 91 02 00 00 49 8d 7d 18 41 83 c4 01 49 8b 5d 00 48 89 f8 48 RSP: 0018:ffff8801dae06f80 EFLAGS: 00000046 RAX: 1ffff10031d76f50 RBX: ffff88018ebb7a80 RCX: ffffffff8161e411 RDX: ffff8801bd5b15a8 RSI: 0000000000000000 RDI: ffff8801c6484360 RBP: ffff8801dae07070 R08: fffffbfff15fb596 R09: fffffbfff15fb595 R10: fffffbfff15fb595 R11: ffffffff8afdacab R12: 0000000000000001 R13: ffff88018ebb7a80 R14: dffffc0000000000 R15: ffffffff8afdaca8 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c463a000 CR4: 00000000001406f0 Call Trace: kmem_cache_free+0x202/0x290 mm/slab.c:3755 mempool_free_slab+0x1d/0x30 mm/mempool.c:512 mempool_free+0xed/0x370 mm/mempool.c:494 bvec_free+0xa8/0xd0 block/bio.c:173 bio_free+0xc1/0x150 block/bio.c:259 bio_put+0x187/0x200 block/bio.c:561 ext4_end_bio+0x197/0x6e0 fs/ext4/page-io.c:343 bio_endio+0x5d2/0xb80 block/bio.c:1774 req_bio_endio block/blk-core.c:277 [inline] blk_update_request+0x3bd/0xcc0 block/blk-core.c:3102 scsi_end_request+0xde/0x860 drivers/scsi/scsi_lib.c:673 scsi_io_completion+0x2ce/0x1ca0 drivers/scsi/scsi_lib.c:1093 scsi_finish_command+0x579/0x970 drivers/scsi/scsi.c:248 scsi_softirq_done+0x465/0x520 drivers/scsi/scsi_lib.c:1737 __blk_mq_complete_request block/blk-mq.c:583 [inline] blk_mq_complete_request+0x3ba/0x680 block/blk-mq.c:620 scsi_mq_done+0x10d/0x460 drivers/scsi/scsi_lib.c:2048 virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207 virtscsi_vq_done+0xcb/0x180 drivers/scsi/virtio_scsi.c:223 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950 __handle_irq_event_percpu+0x1e6/0xb00 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x227/0x880 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x98/0x1c0 arch/x86/kernel/irq.c:246 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:643 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 13 28 12 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 02 28 12 fa eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffffffff89207bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda RAX: dffffc0000000000 RBX: 1ffffffff1240f7b RCX: 0000000000000000 RDX: 1ffffffff1263e44 RSI: 0000000000000001 RDI: ffffffff8931f220 RBP: ffffffff89207bb8 R08: ffffffff89276e40 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89207c78 R13: ffffffff89f3c0e0 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3db/0x5b0 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe2/0xe5 init/main.c:442 start_kernel+0x8f4/0x92f init/main.c:739 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243