INFO: task kworker/u4:0:8 blocked for more than 142 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:0 state:D stack:25848 pid:8 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_write_slowpath+0x600/0x12e0 kernel/locking/rwsem.c:1190 __down_write_common kernel/locking/rwsem.c:1305 [inline] __down_write_common kernel/locking/rwsem.c:1302 [inline] __down_write kernel/locking/rwsem.c:1314 [inline] down_write+0x1e8/0x220 kernel/locking/rwsem.c:1563 kernfs_remove_by_name_ns+0x89/0x120 fs/kernfs/dir.c:1657 kernfs_remove_by_name include/linux/kernfs.h:618 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x8b/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x60/0xa0 fs/sysfs/group.c:304 device_remove_groups drivers/base/core.c:2580 [inline] device_remove_attrs+0x192/0x290 drivers/base/core.c:2755 device_del+0x4ef/0xc80 drivers/base/core.c:3665 unregister_netdevice_many_notify+0xdfe/0x19e0 net/core/dev.c:10869 ip_tunnel_delete_nets+0x3a3/0x5c0 net/ipv4/ip_tunnel.c:1126 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:606 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task udevd:4426 blocked for more than 143 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:26144 pid:4426 ppid:1 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2244 [inline] path_lookupat+0xb7/0x840 fs/namei.c:2473 filename_lookup+0x1d2/0x590 fs/namei.c:2503 vfs_statx+0x14c/0x430 fs/stat.c:232 vfs_fstatat+0x90/0xb0 fs/stat.c:270 __do_sys_newfstatat+0x94/0x120 fs/stat.c:440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb6bf3251da RSP: 002b:00007ffeda0746d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 0000556e66349280 RCX: 00007fb6bf3251da RDX: 00007ffeda0746e8 RSI: 00007ffeda074b78 RDI: 00000000ffffff9c RBP: 00007ffeda074778 R08: 0000000000000000 R09: 0000556e663361c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeda074b78 R13: 00007ffeda0746e8 R14: 0000556e6630b2c0 R15: 0000000000000000 INFO: task syz-executor.0:5091 blocked for more than 143 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:22672 pid:5091 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_write_slowpath+0x600/0x12e0 kernel/locking/rwsem.c:1190 __down_write_common kernel/locking/rwsem.c:1305 [inline] __down_write_common kernel/locking/rwsem.c:1302 [inline] __down_write kernel/locking/rwsem.c:1314 [inline] down_write+0x1e8/0x220 kernel/locking/rwsem.c:1563 kernfs_remove_by_name_ns+0x89/0x120 fs/kernfs/dir.c:1657 kernfs_remove_by_name include/linux/kernfs.h:618 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x8b/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x60/0xa0 fs/sysfs/group.c:304 __kobject_del+0x89/0x1f0 lib/kobject.c:579 kobject_del lib/kobject.c:611 [inline] kobject_del+0x40/0x60 lib/kobject.c:603 ext4_put_super+0x7a/0x1170 fs/ext4/super.c:1205 generic_shutdown_super+0x158/0x410 fs/super.c:492 kill_block_super+0x9b/0xf0 fs/super.c:1386 deactivate_locked_super+0x98/0x160 fs/super.c:332 deactivate_super+0xb1/0xd0 fs/super.c:363 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff51d68d567 RSP: 002b:00007ffff8a24858 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff51d68d567 RDX: 00007ffff8a2492a RSI: 000000000000000a RDI: 00007ffff8a24920 RBP: 00007ffff8a24920 R08: 00000000ffffffff R09: 00007ffff8a246f0 R10: 000055555734b8b3 R11: 0000000000000246 R12: 00007ff51d6e6b24 R13: 00007ffff8a259e0 R14: 000055555734b810 R15: 00007ffff8a25a20 INFO: task syz-executor.1:5093 blocked for more than 144 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24280 pid:5093 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f630dc8bc68 RSP: 002b:00007ffec93b1b50 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000068 RCX: 00007f630dc8bc68 RDX: 0000000000090800 RSI: 00007f630dce6bc8 RDI: 00000000ffffff9c RBP: 00007ffec93b1c1c R08: 0000000000090800 R09: 00007f630dce6bc8 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 0000000000041250 R14: 000000000000001e R15: 00007ffec93b1c80 INFO: task syz-executor.2:5100 blocked for more than 144 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:24056 pid:5100 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f75fc28bc68 RSP: 002b:00007ffc00180370 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000000007d RCX: 00007f75fc28bc68 RDX: 0000000000090800 RSI: 00007f75fc2e6bc8 RDI: 00000000ffffff9c RBP: 00007ffc0018043c R08: 0000000000090800 R09: 00007f75fc2e6bc8 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 0000000000040f39 R14: 000000000000000b R15: 00007ffc001804a0 INFO: task syz-executor.3:5102 blocked for more than 145 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24456 pid:5102 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa49a28bc68 RSP: 002b:00007fff236271b0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000075 RCX: 00007fa49a28bc68 RDX: 0000000000090800 RSI: 00007fa49a2e6bc8 RDI: 00000000ffffff9c RBP: 00007fff2362727c R08: 0000000000090800 R09: 00007fa49a2e6bc8 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 0000000000040f58 R14: 000000000000000b R15: 00007fff236272e0 INFO: task syz-executor.4:5104 blocked for more than 146 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24208 pid:5104 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbed368bc68 RSP: 002b:00007ffd8adb00b0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000000004f RCX: 00007fbed368bc68 RDX: 0000000000090800 RSI: 00007fbed36e6bc8 RDI: 00000000ffffff9c RBP: 00007ffd8adb017c R08: 0000000000090800 R09: 00007fbed36e6bc8 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 0000000000040f6f R14: 000000000000000b R15: 00007ffd8adb01e0 INFO: task syz-executor.5:5105 blocked for more than 146 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24736 pid:5105 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb76a88bc68 RSP: 002b:00007ffdc18d57f0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000000006c RCX: 00007fb76a88bc68 RDX: 0000000000090800 RSI: 00007fb76a8e6bc8 RDI: 00000000ffffff9c RBP: 00007ffdc18d58bc R08: 0000000000090800 R09: 00007fb76a8e6bc8 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 0000000000040fd5 R14: 000000000000000b R15: 00007ffdc18d5920 INFO: task udevd:5710 blocked for more than 147 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:26488 pid:5710 ppid:4426 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130 d_revalidate fs/namei.c:856 [inline] d_revalidate fs/namei.c:853 [inline] lookup_fast+0x22d/0x520 fs/namei.c:1646 walk_component+0x5e/0x5a0 fs/namei.c:1989 link_path_walk.part.0+0x730/0xdf0 fs/namei.c:2320 link_path_walk fs/namei.c:2245 [inline] path_openat+0x25c/0x2a50 fs/namei.c:3710 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb6bf325697 RSP: 002b:00007ffeda06c460 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000556e66341110 RCX: 00007fb6bf325697 RDX: 0000000000080000 RSI: 00007ffeda06c598 RDI: 00000000ffffff9c RBP: 00007ffeda06c598 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 0000556e66341110 R14: 0000000000000001 R15: 0000556e65129160 INFO: task modprobe:6071 blocked for more than 147 seconds. Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:modprobe state:D stack:26632 pid:6071 ppid:5521 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xbdd/0x54f0 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095 __down_read_common kernel/locking/rwsem.c:1260 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0xe6/0x450 kernel/locking/rwsem.c:1511 kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 do_inode_permission fs/namei.c:458 [inline] inode_permission.part.0+0x3d6/0x670 fs/namei.c:525 inode_permission fs/namei.c:506 [inline] may_lookup fs/namei.c:1715 [inline] link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2244 [inline] path_lookupat+0xb7/0x840 fs/namei.c:2473 filename_lookup+0x1d2/0x590 fs/namei.c:2503 user_path_at_empty+0x46/0x60 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] user_statfs+0x8a/0x170 fs/statfs.c:103 __do_sys_statfs+0x7a/0xf0 fs/statfs.c:195 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb26ef462a7 RSP: 002b:00007ffefea8e938 EFLAGS: 00000246 ORIG_RAX: 0000000000000089 RAX: ffffffffffffffda RBX: 00007fb26ee434f8 RCX: 00007fb26ef462a7 RDX: 00007fb26ee4517c RSI: 00007ffefea8e9c0 RDI: 00007fb26ee3b723 RBP: 00007fb26ee3b723 R08: 0000000000007fff R09: 0000000000000000 R10: 00007ffefea8e9d0 R11: 0000000000000246 R12: 00007ffefea8e9c0 R13: 00007ffefea8eb50 R14: 00007fb26ee434f8 R15: 0000000000000000 Showing all locks held in the system: 5 locks held by kworker/u4:0/8: #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff8880127ed138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc900002efda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0de210 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:568 #3: ffffffff8e0f1c28 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x92/0x5c0 net/ipv4/ip_tunnel.c:1121 #4: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x89/0x120 fs/kernfs/dir.c:1657 1 lock held by rcu_tasks_kthre/11: #0: ffffffff8c78e790 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/12: #0: ffffffff8c78e490 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/27: #0: ffffffff8c78f2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494 2 locks held by kworker/u4:3/45: #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90000d6fda8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 3 locks held by kworker/0:3/1119: #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90005ddfda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0f1c28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4629 1 lock held by udevd/4426: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 2 locks held by getty/4746: #0: ffff88814b0e0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900020482f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 2 locks held by syz-executor.0/5091: #0: ffff888036d640e0 (&type->s_umount_key#50){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:362 #1: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_remove_by_name_ns+0x89/0x120 fs/kernfs/dir.c:1657 1 lock held by syz-executor.1/5093: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 1 lock held by syz-executor.2/5100: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 1 lock held by syz-executor.3/5102: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 1 lock held by syz-executor.4/5104: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 1 lock held by syz-executor.5/5105: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 3 locks held by kworker/1:7/5172: #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888027bd5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004b47da8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffffffff8e0f1c28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4629 2 locks held by kworker/u4:15/5521: #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888012477138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90004ccfda8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 1 lock held by udevd/5710: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130 1 lock held by syz-executor.3/6056: 1 lock held by syz-executor.2/6055: 2 locks held by syz-executor.4/6057: 3 locks held by syz-executor.5/6068: #0: ffff88801f98a368 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_global_lock_killable drivers/block/loop.c:120 [inline] #0: ffff88801f98a368 (&lo->lo_mutex){+.+.}-{3:3}, at: loop_configure+0x2f7/0x19e0 drivers/block/loop.c:1026 #1: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_add_one+0xa7/0x4f0 fs/kernfs/dir.c:754 #2: ffff8881401ca108 (&sem->wait_lock){....}-{2:2}, at: rwsem_down_write_slowpath+0x657/0x12e0 kernel/locking/rwsem.c:1194 1 lock held by modprobe/6071: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 1 lock held by modprobe/6074: #0: ffff8881401ca148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc75/0xfc0 kernel/hung_task.c:377 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6068 Comm: syz-executor.5 Not tainted 6.2.0-rc8-syzkaller-00027-g033c40a89f55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:kasan_check_range+0x1a/0x190 mm/kasan/generic.c:188 Code: c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 66 0f 1f 00 48 85 f6 0f 84 3c 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 <53> 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 RSP: 0018:ffffc90004ab7470 EFLAGS: 00000092 RAX: 0000000000000001 RBX: 1ffff92000956e98 RCX: ffffffff81623fee RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9139dac8 RBP: 0000000000000040 R08: 0000000000000000 R09: ffffffff9139dad0 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888042abaae0 R13: 0000000000000006 R14: 0000000000000073 R15: ffff888042abab00 FS: 00007fb76b5fc700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c004f89588 CR3: 000000007c8c6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:227 [inline] mark_lock.part.0+0xee/0x1910 kernel/locking/lockdep.c:4612 mark_lock kernel/locking/lockdep.c:4598 [inline] mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4236 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4262 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4321 [inline] lockdep_hardirqs_on_prepare+0x28f/0x410 kernel/locking/lockdep.c:4273 trace_hardirqs_on+0x31/0x180 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 rwsem_down_write_slowpath+0x5af/0x12e0 kernel/locking/rwsem.c:1166 __down_write_common kernel/locking/rwsem.c:1305 [inline] __down_write_common kernel/locking/rwsem.c:1302 [inline] __down_write kernel/locking/rwsem.c:1314 [inline] down_write+0x1e8/0x220 kernel/locking/rwsem.c:1563 kernfs_add_one+0xa7/0x4f0 fs/kernfs/dir.c:754 __kernfs_create_file+0x2a0/0x350 fs/kernfs/file.c:1076 sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x322/0xb10 fs/sysfs/group.c:148 loop_sysfs_init drivers/block/loop.c:746 [inline] loop_configure+0xf33/0x19e0 drivers/block/loop.c:1097 lo_ioctl+0x936/0x1990 drivers/block/loop.c:1550 blkdev_ioctl+0x375/0x800 block/ioctl.c:616 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb76a88bee7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 c4 57 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007fb76b5fbf38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fb76a88bee7 RDX: 0000000000000005 RSI: 0000000000004c00 RDI: 0000000000000006 RBP: 0000000000000006 R08: 0000000000000000 R09: 00000000000004a0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb76b5fbfdc R14: 00007fb76b5fbfe0 R15: 0000000020000a42