netlink: 12 bytes leftover after parsing attributes in process `syz-executor1'. ====================================================== WARNING: possible circular locking dependency detected 4.19.0-rc5+ #243 Not tainted ------------------------------------------------------ syz-executor1/15308 is trying to acquire lock: 000000008bac8495 ((wq_completion)bond_dev->name){+.+.}, at: flush_workqueue+0x2db/0x1e10 kernel/workqueue.c:2652 but task is already holding lock: 00000000bc5ca472 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] 00000000bc5ca472 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40e/0xc20 net/core/rtnetlink.c:4727 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 bond_netdev_notify drivers/net/bonding/bond_main.c:1303 [inline] bond_netdev_notify_work+0x44/0xd0 drivers/net/bonding/bond_main.c:1313 process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 -> #1 ((work_completion)(&(&nnw->work)->work)){+.+.}: process_one_work+0xc0a/0x1b90 kernel/workqueue.c:2129 kobject: 'loop3' (00000000d405f644): kobject_uevent_env worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 -> #0 ((wq_completion)bond_dev->name kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' ){+.+.}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900 flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655 drain_workqueue+0x2a9/0x640 kernel/workqueue.c:2820 destroy_workqueue+0xc6/0x9c0 kernel/workqueue.c:4155 kobject: 'loop5' (000000008c9414de): kobject_uevent_env __alloc_workqueue_key+0xed8/0x1170 kernel/workqueue.c:4138 bond_init+0x265/0x940 drivers/net/bonding/bond_main.c:4727 register_netdevice+0x332/0x10f0 net/core/dev.c:8410 bond_newlink+0x49/0xa0 drivers/net/bonding/bond_netlink.c:453 rtnl_newlink+0xec6/0x1d40 net/core/rtnetlink.c:3118 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4730 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2447 kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4748 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 kobject: 'loop3' (00000000d405f644): kobject_uevent_env do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: (wq_completion)bond_dev->name --> (work_completion)(&(&nnw->work)->work) --> rtnl_mutex kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock((work_completion)(&(&nnw->work)->work)); lock(rtnl_mutex); lock((wq_completion)bond_dev->name); *** DEADLOCK *** 1 lock held by syz-executor1/15308: #0: 00000000bc5ca472 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000bc5ca472 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40e/0xc20 net/core/rtnetlink.c:4727 stack backtrace: CPU: 1 PID: 15308 Comm: syz-executor1 Not tainted 4.19.0-rc5+ #243 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 print_circular_bug.isra.33.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1861 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x33e4/0x4ec0 kernel/locking/lockdep.c:3411 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900 flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655 drain_workqueue+0x2a9/0x640 kernel/workqueue.c:2820 destroy_workqueue+0xc6/0x9c0 kernel/workqueue.c:4155 __alloc_workqueue_key+0xed8/0x1170 kernel/workqueue.c:4138 bond_init+0x265/0x940 drivers/net/bonding/bond_main.c:4727 register_netdevice+0x332/0x10f0 net/core/dev.c:8410 bond_newlink+0x49/0xa0 drivers/net/bonding/bond_netlink.c:453 rtnl_newlink+0xec6/0x1d40 net/core/rtnetlink.c:3118 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4730 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2447 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4748 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd89014dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd89014e6d4 R13: 00000000004c38b9 R14: 00000000004d5700 R15: 00000000ffffffff kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor5': attribute type 1 has an invalid length. kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' netlink: 'syz-executor5': attribute type 1 has an invalid length. kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env netlink: 20 bytes leftover after parsing attributes in process `syz-executor3'. kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' sctp: [Deprecated]: syz-executor2 (pid 15500) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 20 bytes leftover after parsing attributes in process `syz-executor3'. kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' sctp: [Deprecated]: syz-executor2 (pid 15500) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env net_ratelimit: 45 callbacks suppressed ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 openvswitch: netlink: Flow get message rejected, Key attribute missing. kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env openvswitch: netlink: Flow get message rejected, Key attribute missing. kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 kobject: 'loop1' (000000002fe77a85): kobject_uevent_env openvswitch: netlink: Message has 12 unknown bytes. kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0000:00bb with DS=0x3 kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' openvswitch: netlink: Message has 16 unknown bytes. kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 15865 Comm: syz-executor2 Not tainted 4.19.0-rc5+ #243 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x47/0x730 mm/slab.c:3552 __build_skb+0xab/0x430 net/core/skbuff.c:281 __napi_alloc_skb+0x1d6/0x310 net/core/skbuff.c:482 napi_alloc_skb include/linux/skbuff.h:2696 [inline] napi_get_frags+0x67/0x140 net/core/dev.c:5624 tun_napi_alloc_frags drivers/net/tun.c:1469 [inline] tun_get_user+0x1e6c/0x42a0 drivers/net/tun.c:1827 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:2001 call_write_iter include/linux/fs.h:1808 [inline] do_iter_readv_writev+0x8b0/0xa80 fs/read_write.c:680 do_iter_write+0x185/0x5f0 fs/read_write.c:959 kobject: 'loop1' (000000002fe77a85): kobject_uevent_env vfs_writev+0x1f1/0x360 fs/read_write.c:1004 kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' do_writev+0x11a/0x310 fs/read_write.c:1039 __do_sys_writev fs/read_write.c:1112 [inline] __se_sys_writev fs/read_write.c:1109 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1109 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop5' (000000008c9414de): kobject_uevent_env RIP: 0033:0x457431 Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 54 b5 fb ff c3 48 83 ec 08 e8 1a 2d 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 63 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f95c481aba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000000004a RCX: 0000000000457431 RDX: 0000000000000001 RSI: 00007f95c481abf0 RDI: 00000000000000f0 RBP: 0000000020000000 R08: 00000000000000f0 R09: 0000000000000000 R10: 0000000000000064 R11: 0000000000000293 R12: 00007f95c481b6d4 kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' R13: 00000000004c48a4 R14: 00000000004d7b90 R15: 0000000000000003 kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000008c9414de): kobject_uevent_env CPU: 1 PID: 15956 Comm: syz-executor1 Not tainted 4.19.0-rc5+ #243 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000008c9414de): kobject_uevent_env should_fail_alloc_page mm/page_alloc.c:3057 [inline] prepare_alloc_pages mm/page_alloc.c:4326 [inline] __alloc_pages_nodemask+0x34b/0xde0 mm/page_alloc.c:4364 kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093 kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' alloc_pages include/linux/gfp.h:509 [inline] __page_cache_alloc+0x38f/0x5b0 mm/filemap.c:946 pagecache_get_page+0x396/0xf00 mm/filemap.c:1577 kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' grab_cache_page_write_begin+0x75/0xa0 mm/filemap.c:3089 kobject: 'loop2' (00000000348b8a34): kobject_uevent_env ext4_da_write_begin+0x39f/0x12c0 fs/ext4/inode.c:3047 kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' generic_perform_write+0x3aa/0x6a0 mm/filemap.c:3139 kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3264 ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266 call_write_iter include/linux/fs.h:1808 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd89014dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd89014dc90 RCX: 0000000000457579 RDX: 0000000000715371 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd89014e6d4 R13: 00000000004c5574 R14: 00000000004d8e98 R15: 0000000000000004 kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' net_ratelimit: 70 callbacks suppressed ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:4800:00bb with DS=0x3 openvswitch: netlink: Message has 12 unknown bytes. kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:4800:00bb with DS=0x3 kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' openvswitch: netlink: Message has 12 unknown bytes. kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0500:00bb with DS=0x3 openvswitch: netlink: Key 0 has unexpected len 12 expected 0 kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:0500:00bb with DS=0x3 kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:1000:00bb with DS=0x3 openvswitch: netlink: Message has 12 unknown bytes. kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' ip6_tunnel: non-ECT from fe80:0000:0800:0000:0000:0000:1000:00bb with DS=0x3 kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000616706b8): kobject_uevent_env kobject: 'loop4' (00000000616706b8): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env kobject: 'loop2' (00000000348b8a34): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000e82c5d47): kobject_uevent_env kobject: 'loop0' (00000000e82c5d47): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (000000002fe77a85): kobject_uevent_env kobject: 'loop1' (000000002fe77a85): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000d405f644): kobject_uevent_env kobject: 'loop3' (00000000d405f644): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000008c9414de): kobject_uevent_env kobject: 'loop5' (000000008c9414de): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000348b8a34): kobject_uevent_env