====================================================== WARNING: possible circular locking dependency detected 4.19.0-rc6+ #265 Not tainted ------------------------------------------------------ syz-executor4/8013 is trying to acquire lock: 0000000047b9031f ((wq_completion)bond_dev->name){+.+.}, at: flush_workqueue+0x2db/0x1e10 kernel/workqueue.c:2652 but task is already holding lock: 00000000c87b70ca (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] 00000000c87b70ca (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40e/0xc20 net/core/rtnetlink.c:4712 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 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){+.+.}: 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:8409 bond_newlink+0x49/0xa0 drivers/net/bonding/bond_netlink.c:453 rtnl_newlink+0xec6/0x1d40 net/core/rtnetlink.c:3103 kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4715 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4733 kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1343 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 kobject: 'loop2' (000000004edd7009): kobject_uevent_env __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 kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' other info that might help us debug this: Chain exists of: (wq_completion)bond_dev->name --> (work_completion)(&(&nnw->work)->work) --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock((work_completion)(&(&nnw->work)->work) kobject: 'loop1' (0000000040f9415d): kobject_uevent_env ); lock(rtnl_mutex); lock((wq_completion)bond_dev->name); *** DEADLOCK *** 1 lock held by syz-executor4/8013: #0: 00000000c87b70ca (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000c87b70ca (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40e/0xc20 net/core/rtnetlink.c:4712 stack backtrace: kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' CPU: 0 PID: 8013 Comm: syz-executor4 Not tainted 4.19.0-rc6+ #265 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 kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' __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:8409 bond_newlink+0x49/0xa0 drivers/net/bonding/bond_netlink.c:453 rtnl_newlink+0xec6/0x1d40 net/core/rtnetlink.c:3103 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4715 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4733 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1343 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908 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:00007f34a8402c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000006 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f34a84036d4 R13: 00000000004c38b9 R14: 00000000004d5700 R15: 00000000ffffffff kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'kvm' (000000000f446a1a): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (000000000f446a1a): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'kvm' (000000000f446a1a): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (000000000f446a1a): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (000000000f446a1a): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000000f446a1a): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000000f446a1a): kobject_uevent_env kobject: 'kvm' (000000000f446a1a): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' dccp_close: ABORT with 106496 bytes unread kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' dccp_close: ABORT with 98304 bytes unread kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' dccp_close: ABORT with 106496 bytes unread kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' dccp_close: ABORT with 1061 bytes unread kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=00000000230f37ec [p=00000000421e40d2 fl=222 nc=0 na=1] FS-Cache: O-cookie d=0000000060e02297 n=00000000a7a21579 FS-Cache: O-key=[10] '0200020000807f000008' FS-Cache: N-cookie c=000000005da4ab50 [p=00000000421e40d2 fl=2 nc=0 na=1] FS-Cache: N-cookie d=0000000060e02297 n=00000000fe3de1d2 FS-Cache: N-key=[10] '0200020000807f000008' kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' FS-Cache: Duplicate cookie detected FS-Cache: O-cookie c=000000006f7bb081 [p=00000000421e40d2 fl=222 nc=0 na=1] FS-Cache: O-cookie d=0000000060e02297 n=00000000ef541cdc FS-Cache: O-key=[10] '0200020000807f000008' FS-Cache: N-cookie c=0000000071fe0d2b [p=00000000421e40d2 fl=2 nc=0 na=1] FS-Cache: N-cookie d=0000000060e02297 n=00000000b78d6a56 FS-Cache: N-key=[10] '0200020000807f000008' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' dccp_close: ABORT with 4096 bytes unread kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env FS-Cache: Duplicate cookie detected FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 FS-Cache: O-cookie c=000000006f7bb081 [p=00000000421e40d2 fl=222 nc=0 na=1] kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' FS-Cache: O-cookie d=0000000060e02297 n=00000000ef541cdc CPU: 1 PID: 8407 Comm: syz-executor5 Not tainted 4.19.0-rc6+ #265 FS-Cache: O-key=[10] ' 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 02 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 00 02 00 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 00 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2d7/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] ion_buffer_create drivers/staging/android/ion/ion.c:71 [inline] ion_alloc+0x263/0xa60 drivers/staging/android/ion/ion.c:409 80 7f ion_ioctl+0x216/0x41e drivers/staging/android/ion/ion-ioctl.c:76 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 00 00 08 ' FS-Cache: N-cookie c=000000005245b91b [p=00000000421e40d2 fl=2 nc=0 na=1] ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 FS-Cache: N-cookie d=0000000060e02297 n=00000000483f0a55 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FS-Cache: N-key=[10] ' 02 entry_SYSCALL_64_after_hwframe+0x49/0xbe 00 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:00007ff44158ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff44158ac90 RCX: 0000000000457579 RDX: 0000000020000500 RSI: 00000000c0184900 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 02 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff44158b6d4 R13: 00000000004bf97f R14: 00000000004cf928 R15: 0000000000000004 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 000080 CPU: 1 PID: 8412 Comm: syz-executor5 Not tainted 4.19.0-rc6+ #265 7f 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 00 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 00 08 ' 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 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:509 [inline] ion_system_contig_heap_allocate+0x3e/0x330 drivers/staging/android/ion/ion_system_heap.c:317 ion_buffer_create drivers/staging/android/ion/ion.c:80 [inline] ion_alloc+0x333/0xa60 drivers/staging/android/ion/ion.c:409 ion_ioctl+0x216/0x41e drivers/staging/android/ion/ion-ioctl.c:76 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 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:00007ff44158ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff44158ac90 RCX: 0000000000457579 RDX: 0000000020000500 RSI: 00000000c0184900 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff44158b6d4 R13: 00000000004bf97f R14: 00000000004cf928 R15: 0000000000000004 kobject: 'loop0' (000000008af5dd5f): kobject_uevent_env kobject: 'loop0' (000000008af5dd5f): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000004edd7009): kobject_uevent_env kobject: 'loop2' (000000004edd7009): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000c31a38ee): kobject_uevent_env kobject: 'loop3' (00000000c31a38ee): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000005bc25f85): kobject_uevent_env kobject: 'loop5' (000000005bc25f85): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (00000000253a0a0e): kobject_uevent_env kobject: 'loop4' (00000000253a0a0e): fill_kobj_path: path = '/devices/virtual/block/loop4' FS-Cache: Duplicate cookie detected kobject: 'loop1' (0000000040f9415d): kobject_uevent_env kobject: 'loop1' (0000000040f9415d): fill_kobj_path: path = '/devices/virtual/block/loop1' FS-Cache: O-cookie c=0000000088668d7f [p=00000000421e40d2 fl=222 nc=0 na=1] FS-Cache: O-cookie d=0000000060e02297 n=000000005fa5253b FS-Cache: O-key=[10] '0200020000807f000008' FS-Cache: N-cookie c=00000000569251ae [p=00000000421e40d2 fl=2 nc=0 na=1] FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FS-Cache: N-cookie d=0000000060e02297 n=0000000008bab6f7 CPU: 1 PID: 8430 Comm: syz-executor5 Not tainted 4.19.0-rc6+ #265 FS-Cache: N-key=[10] ' 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 02 00 02 00 00 80 __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_trace+0x2d7/0x750 mm/slab.c:3618 7f kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] ion_buffer_create drivers/staging/android/ion/ion.c:71 [inline] ion_alloc+0x263/0xa60 drivers/staging/android/ion/ion.c:409 00 00 ion_ioctl+0x216/0x41e drivers/staging/android/ion/ion-ioctl.c:76 08 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ' ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 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:00007ff44158ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff44158ac90 RCX: 0000000000457579