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-executor0:4476 blocked for more than 140 seconds. Not tainted 4.19.0-rc1+ #213 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22504 4476 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.42+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5300 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455190 Code: 24 98 00 00 00 48 89 14 24 e8 dc ef ff ff 48 8b 44 24 10 48 8b 4c 24 08 48 8b 54 24 70 48 39 d0 0f 85 69 01 00 00 48 8b 9c 24 <10> 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 RSP: 002b:00007ffd52af8670 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455190 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004c1d68 RBP: 000000000000011b R08: 0000000000000001 R09: 0000000001d47940 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000011 R13: 0000000000041e5a R14: 000000000000000a R15: badc0ffeebadface INFO: task syz-executor0:6810 blocked for more than 140 seconds. Not tainted 4.19.0-rc1+ #213 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22104 6810 4476 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0x1456/0x1eb0 fs/dcache.c:2510 __lookup_slow+0x1e6/0x540 fs/namei.c:1654 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.42+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5300 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410dc1 Code: c7 84 24 80 00 00 00 00 00 00 00 48 c7 84 24 88 00 00 00 00 00 00 00 48 c7 84 24 90 00 00 00 00 00 00 00 48 8d 05 0f 5e 04 00 <48> 89 44 24 78 48 8d 44 24 50 48 89 84 24 80 00 00 00 48 8d 84 24 RSP: 002b:00007f4bf9f3bbb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f4bf9f3c6d4 RCX: 0000000000410dc1 RDX: 00007f4bf9f3bbdf RSI: 0000000000000002 RDI: 00007f4bf9f3bbd0 RBP: 0000000000930140 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000004 R11: 0000000000000293 R12: 00000000ffffffff R13: 00000000004d6b70 R14: 00000000004ca09a R15: 0000000000000001 Showing all locks held in the system: 1 lock held by khungtaskd/774: #0: 000000003b54bedd (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436 2 locks held by rsyslogd/4339: #0: 0000000007573dd6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 #1: 00000000b782fce4 (fs_reclaim){+.+.}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:530 2 locks held by getty/4429: #0: 00000000d9751e37 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009ac7bcd3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4430: #0: 00000000f6ace46c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003637699d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4431: #0: 0000000099ea96e2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e368957a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4432: #0: 00000000cb5aa5b6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c104cdc4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4433: #0: 0000000086fe5649 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c34bc738 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4434: #0: 0000000085ace632 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000007214535f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4435: #0: 00000000deee3161 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000039372710 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor0/4476: #0: 0000000081956b9d (&sb->s_type->i_mutex_key#18){++++}, at: inode_lock_shared include/linux/fs.h:748 [inline] #0: 0000000081956b9d (&sb->s_type->i_mutex_key#18){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 #1: 00000000307aab2e (&sbi->s_lock){+.+.}, at: vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 3 locks held by syz-executor0/6809: 1 lock held by syz-executor0/6810: #0: 0000000081956b9d (&sb->s_type->i_mutex_key#18){++++}, at: inode_lock_shared include/linux/fs.h:748 [inline] #0: 0000000081956b9d (&sb->s_type->i_mutex_key#18){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 774 Comm: khungtaskd Not tainted 4.19.0-rc1+ #213 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 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+0xb39/0x1040 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 0 to CPUs 1: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.190 msecs NMI backtrace for cpu 1 CPU: 1 PID: 6809 Comm: syz-executor0 Not tainted 4.19.0-rc1+ #213 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_bh_lru fs/buffer.c:1264 [inline] RIP: 0010:__find_get_block+0x1ae/0xdf0 fs/buffer.c:1291 Code: 89 9d 90 fe ff ff 48 85 db 74 c0 e8 4c 1c a6 ff 48 8d 7b 18 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 8f 0a 00 00 4c 8b 7b 18 <48> 8b bd b0 fe ff ff 4c 89 fe e8 d3 1c a6 ff 4c 39 bd b0 fe ff ff RSP: 0018:ffff88018869e908 EFLAGS: 00000046 RAX: 1ffff10039271203 RBX: ffff8801c9389000 RCX: ffffc90001e1c000 RDX: 0000000000040000 RSI: ffffffff81d6a434 RDI: ffff8801c9389018 RBP: ffff88018869ea98 R08: ffff8801b4b4e780 R09: fffff94000dcafae R10: fffff94000dcafae R11: ffffea0006e57d77 R12: 0000000000000002 R13: dffffc0000000000 R14: 0000000000000002 R15: 00000000000004a9 FS: 00007f4bf9f5d700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002048000 CR3: 0000000192c2f000 CR4: 00000000001406e0 Call Trace: __getblk_slow fs/buffer.c:1040 [inline] __getblk_gfp+0x2be/0xb10 fs/buffer.c:1321 __bread_gfp+0x2d/0x310 fs/buffer.c:1355 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x59c/0xa30 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_search_long+0x33b/0x15d0 fs/fat/dir.c:477 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.42+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5300 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x410dc1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 8a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 d3 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f4bf9f5cbb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f4bf9f5d6d4 RCX: 0000000000410dc1 RDX: 00007f4bf9f5cbdf RSI: 0000000000000002 RDI: 00007f4bf9f5cbd0 RBP: 00000000009300a0 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000004 R11: 0000000000000293 R12: 00000000ffffffff R13: 00000000004d6b70 R14: 00000000004ca09a R15: 0000000000000000