IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 INFO: task syz-executor.0:16976 blocked for more than 140 seconds. Not tainted 4.19.89-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27896 16976 7781 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 request_wait_answer+0x42f/0x7d0 fs/fuse/dev.c:485 __fuse_request_send+0x126/0x1d0 fs/fuse/dev.c:505 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:518 fuse_simple_request+0x2f6/0x720 fs/fuse/dev.c:576 fuse_lookup_name+0x275/0x5b0 fs/fuse/dir.c:330 fuse_lookup+0xeb/0x3e0 fs/fuse/dir.c:368 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path include/linux/namei.h:62 [inline] do_mount+0x150/0x2bc0 fs/namespace.c:2739 ksys_mount+0xdb/0x150 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a909 Code: Bad RIP value. RSP: 002b:00007fee070c6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee070c76d4 R13: 00000000004c7d21 R14: 00000000004dec00 R15: 00000000ffffffff INFO: task syz-executor.0:17087 blocked for more than 140 seconds. Not tainted 4.19.89-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27896 17087 7781 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 request_wait_answer+0x42f/0x7d0 fs/fuse/dev.c:485 __fuse_request_send+0x126/0x1d0 fs/fuse/dev.c:505 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:518 fuse_simple_request+0x2f6/0x720 fs/fuse/dev.c:576 fuse_lookup_name+0x275/0x5b0 fs/fuse/dir.c:330 fuse_lookup+0xeb/0x3e0 fs/fuse/dir.c:368 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path include/linux/namei.h:62 [inline] do_mount+0x150/0x2bc0 fs/namespace.c:2739 ksys_mount+0xdb/0x150 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a909 Code: 83 c7 20 49 89 fa 4d 29 c2 4c 29 d3 4c 01 d6 48 8d 0c 1f 48 81 eb 80 00 00 00 0f 18 86 c0 01 00 00 0f 18 86 80 02 00 00 c5 fe <6f> 06 c5 fe 6f 4e 20 c5 fe 6f 56 40 c5 fe 6f 5e 60 48 81 c6 80 00 RSP: 002b:00007fee070c6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee070c76d4 R13: 00000000004c7d21 R14: 00000000004dec00 R15: 00000000ffffffff INFO: task syz-executor.0:17095 blocked for more than 140 seconds. Not tainted 4.19.89-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27896 17095 7781 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 request_wait_answer+0x42f/0x7d0 fs/fuse/dev.c:485 __fuse_request_send+0x126/0x1d0 fs/fuse/dev.c:505 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:518 fuse_simple_request+0x2f6/0x720 fs/fuse/dev.c:576 fuse_lookup_name+0x275/0x5b0 fs/fuse/dir.c:330 fuse_lookup+0xeb/0x3e0 fs/fuse/dir.c:368 __lookup_slow+0x279/0x500 fs/namei.c:1671 lookup_slow+0x58/0x80 fs/namei.c:1688 walk_component+0x747/0x2000 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2348 user_path_at_empty+0x43/0x50 fs/namei.c:2608 user_path include/linux/namei.h:62 [inline] do_mount+0x150/0x2bc0 fs/namespace.c:2739 ksys_mount+0xdb/0x150 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a909 Code: 83 c7 20 49 89 fa 4d 29 c2 4c 29 d3 4c 01 d6 48 8d 0c 1f 48 81 eb 80 00 00 00 0f 18 86 c0 01 00 00 0f 18 86 80 02 00 00 c5 fe <6f> 06 c5 fe 6f 4e 20 c5 fe 6f 56 40 c5 fe 6f 5e 60 48 81 c6 80 00 RSP: 002b:00007fee070c6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee070c76d4 R13: 00000000004c7d21 R14: 00000000004dec00 R15: 00000000ffffffff Showing all locks held in the system: 3 locks held by kworker/u4:5/694: #0: 000000002f233674 (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9608 [inline] #0: 000000002f233674 (&rq->lock){-.-.}, at: pick_next_task_fair+0xfae/0x1580 kernel/sched/fair.c:6780 #1: 00000000f42c89e2 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5997 #2: 00000000f42c89e2 (rcu_read_lock){....}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:417 [inline] #2: 00000000f42c89e2 (rcu_read_lock){....}, at: batadv_nc_worker+0xe3/0x760 net/batman-adv/network-coding.c:730 1 lock held by khungtaskd/1070: #0: 00000000f42c89e2 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 2 locks held by getty/7736: #0: 000000001438b7cc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000127c07a5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7737: #0: 0000000075c0d493 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000001d1eea69 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7738: #0: 0000000078531ba4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000005f0fe177 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7739: #0: 00000000a48f0b3a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000006185450e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7740: #0: 00000000a20fdbbf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000aa35d4b8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7741: #0: 00000000191f2a5c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000213c54b9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7742: #0: 00000000bc0d07a8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000017914dca (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by syz-executor.3/16288: #0: 0000000063fe800a (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 0000000063fe800a (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 0000000084956fe7 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor.3/16299: #0: 0000000060ba847a (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 0000000060ba847a (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 000000009d674466 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor.3/16313: #0: 0000000065be1628 (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 0000000065be1628 (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 00000000514e8d6d (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor.0/16976: #0: 000000001a0b06fc (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 000000001a0b06fc (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 000000002deb5dad (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor.0/17087: #0: 00000000b8e3ae81 (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 00000000b8e3ae81 (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 00000000658bf0bb (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor.0/17095: #0: 0000000083d28bbf (&type->i_mutex_dir_key#9){++++}, at: inode_lock_shared include/linux/fs.h:757 [inline] #0: 0000000083d28bbf (&type->i_mutex_dir_key#9){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 #1: 0000000024eb9cc1 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1070 Comm: khungtaskd Not tainted 4.19.89-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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 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 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60