IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 INFO: task syz-executor.0:6906 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27808 6906 6871 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 request_wait_answer+0x2e3/0x600 fs/fuse/dev.c:478 __fuse_request_send+0xff/0x190 fs/fuse/dev.c:498 fuse_request_send+0x48/0x60 fs/fuse/dev.c:511 fuse_simple_request+0x2b4/0x610 fs/fuse/dev.c:569 fuse_lookup_name+0x238/0x5b0 fs/fuse/dir.c:323 fuse_lookup+0xe4/0x380 fs/fuse/dir.c:361 lookup_slow+0x20f/0x3f0 fs/namei.c:1695 walk_component+0x680/0x21b0 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.41+0x17f/0x810 fs/namei.c:2342 filename_lookup.part.54+0x15b/0x340 fs/namei.c:2376 filename_lookup fs/namei.c:2369 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xb6/0x130 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x7d/0xc0 fs/stat.c:337 SyS_newstat+0x9/0x10 fs/stat.c:333 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7cdfeddc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7cdfede6d4 R13: 00000000004e585b R14: 00000000004deb88 R15: 00000000ffffffff INFO: task syz-executor.0:6907 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29328 6907 6871 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x82/0x290 fs/namespace.c:2119 do_add_mount+0x22/0x310 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x12cf/0x26a0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb8/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7cdfebcc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519 RDX: 0000000020000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007f7cdfebd6d4 R13: 00000000004c595e R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.0:6909 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28768 6909 6871 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 fuse_notify_delete fs/fuse/dev.c:1562 [inline] fuse_notify fs/fuse/dev.c:1796 [inline] fuse_dev_do_write+0xe58/0x2310 fs/fuse/dev.c:1871 fuse_dev_write+0x11a/0x180 fs/fuse/dev.c:1955 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x413/0x840 fs/read_write.c:482 vfs_write+0x150/0x4f0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0x100/0x250 fs/read_write.c:582 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7cdfe9bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519 RDX: 000000000000002e RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7cdfe9c6d4 R13: 00000000004c8d0e R14: 00000000004dfc50 R15: 00000000ffffffff INFO: task syz-executor.0:6946 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28112 6946 6871 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x82/0x290 fs/namespace.c:2119 do_add_mount+0x22/0x310 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x12cf/0x26a0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb8/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7cdfe7ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 000000000075c118 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7cdfe7b6d4 R13: 00000000004c5932 R14: 00000000004da0a0 R15: 00000000ffffffff INFO: task syz-executor.0:6947 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28920 6947 6871 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1fc/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:728 [inline] lookup_slow+0x123/0x3f0 fs/namei.c:1673 walk_component+0x680/0x21b0 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.41+0x17f/0x810 fs/namei.c:2342 filename_lookup.part.54+0x15b/0x340 fs/namei.c:2376 filename_lookup fs/namei.c:2369 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xb6/0x130 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x7d/0xc0 fs/stat.c:337 SyS_newstat+0x9/0x10 fs/stat.c:333 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7cdfe59c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7cdfe5a6d4 R13: 00000000004e585b R14: 00000000004deb88 R15: 00000000ffffffff INFO: task syz-executor.2:6912 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27408 6912 6863 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 request_wait_answer+0x2e3/0x600 fs/fuse/dev.c:478 __fuse_request_send+0xff/0x190 fs/fuse/dev.c:498 fuse_request_send+0x48/0x60 fs/fuse/dev.c:511 fuse_simple_request+0x2b4/0x610 fs/fuse/dev.c:569 fuse_lookup_name+0x238/0x5b0 fs/fuse/dir.c:323 fuse_lookup+0xe4/0x380 fs/fuse/dir.c:361 lookup_slow+0x20f/0x3f0 fs/namei.c:1695 walk_component+0x680/0x21b0 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.41+0x17f/0x810 fs/namei.c:2342 filename_lookup.part.54+0x15b/0x340 fs/namei.c:2376 filename_lookup fs/namei.c:2369 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xb6/0x130 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x7d/0xc0 fs/stat.c:337 SyS_newstat+0x9/0x10 fs/stat.c:333 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f76be954c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76be9556d4 R13: 00000000004e585b R14: 00000000004deb88 R15: 00000000ffffffff INFO: task syz-executor.2:6916 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29032 6916 6863 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 fuse_notify_delete fs/fuse/dev.c:1562 [inline] fuse_notify fs/fuse/dev.c:1796 [inline] fuse_dev_do_write+0xe58/0x2310 fs/fuse/dev.c:1871 fuse_dev_write+0x11a/0x180 fs/fuse/dev.c:1955 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x413/0x840 fs/read_write.c:482 vfs_write+0x150/0x4f0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0x100/0x250 fs/read_write.c:582 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f76be933c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519 RDX: 000000000000002e RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76be9346d4 R13: 00000000004c8d0e R14: 00000000004dfc50 R15: 00000000ffffffff INFO: task syz-executor.2:6919 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29176 6919 6863 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x82/0x290 fs/namespace.c:2119 do_add_mount+0x22/0x310 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x12cf/0x26a0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb8/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f76be912c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519 RDX: 0000000020000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007f76be9136d4 R13: 00000000004c595e R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.2:6952 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28536 6952 6863 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x54f/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x82/0x290 fs/namespace.c:2119 do_add_mount+0x22/0x310 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x12cf/0x26a0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb8/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f76be8f1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 000000000075c118 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76be8f26d4 R13: 00000000004c5932 R14: 00000000004da0a0 R15: 00000000ffffffff INFO: task syz-executor.2:6953 blocked for more than 140 seconds. Not tainted 4.14.157-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28920 6953 6863 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x780/0x1d20 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1fc/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:728 [inline] lookup_slow+0x123/0x3f0 fs/namei.c:1673 walk_component+0x680/0x21b0 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.41+0x17f/0x810 fs/namei.c:2342 filename_lookup.part.54+0x15b/0x340 fs/namei.c:2376 filename_lookup fs/namei.c:2369 [inline] user_path_at_empty+0x39/0x40 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xb6/0x130 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x7d/0xc0 fs/stat.c:337 SyS_newstat+0x9/0x10 fs/stat.c:333 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f76be8d0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f76be8d16d4 R13: 00000000004e585b R14: 00000000004deb88 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4544 2 locks held by getty/6756: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6757: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6758: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6759: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6760: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6761: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6762: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x18b0 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.0/6906: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 1 lock held by syz-executor.0/6907: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 2 locks held by syz-executor.0/6909: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.0/6946: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.0/6947: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 2 locks held by syz-executor.2/6912: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 2 locks held by syz-executor.2/6916: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.2/6919: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.2/6952: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.2/6953: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 2 locks held by syz-executor.3/6926: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 1 lock held by syz-executor.3/6929: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 2 locks held by syz-executor.3/6932: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.3/6958: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.3/6959: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 2 locks held by syz-executor.4/6944: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 2 locks held by syz-executor.4/6945: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.4/6950: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.4/6968: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 1 lock held by syz-executor.4/6969: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 2 locks held by syz-executor.1/6965: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 1 lock held by syz-executor.1/6966: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 2 locks held by syz-executor.1/6967: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.1/6977: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 2 locks held by syz-executor.5/6974: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x123/0x3f0 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0x9f/0xd0 fs/fuse/inode.c:365 1 lock held by syz-executor.5/6975: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 2 locks held by syz-executor.5/6976: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1988/0x2310 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#7){++++}, at: [] fuse_reverse_inval_entry+0x92/0x5c0 fs/fuse/dir.c:962 1 lock held by syz-executor.5/6981: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lock_mount+0x82/0x290 fs/namespace.c:2119 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.157-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 nmi_cpu_backtrace.cold.4+0x3e/0x76 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xe5/0x119 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x522/0xb40 kernel/hung_task.c:274 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2254 Comm: kworker/u4:4 Not tainted 4.14.157-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig task: ffff8880a1f34140 task.stack: ffff8880a1f38000 RIP: 0010:debug_lockdep_rcu_enabled.part.3+0x18/0x60 kernel/rcu/update.c:300 RSP: 0018:ffff8880a1f3fc08 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffff8880a1f34140 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffffffff87cb4600 RBP: ffff8880a1f3fc10 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000079d000 CR3: 000000009440e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_lockdep_rcu_enabled+0x77/0x90 kernel/rcu/update.c:299 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x312/0x400 kernel/locking/lockdep.c:3993 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:176 spin_lock_bh include/linux/spinlock.h:322 [inline] _batadv_purge_orig+0x104/0xe80 net/batman-adv/originator.c:1309 batadv_purge_orig+0x14/0x60 net/batman-adv/originator.c:1338 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2114 worker_thread+0xcc/0xee0 kernel/workqueue.c:2248 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: fd ff ff 48 8b 7d d0 e8 57 bb 37 00 e9 95 fd ff ff 66 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 40 ee 01 00 <48> 8d bb 7c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8