bridge0: port 3(team0) entered forwarding state audit: type=1800 audit(1665718893.921:60): pid=12892 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14214 res=0 8021q: adding VLAN 0 to HW filter on device team0 ============================================ WARNING: possible recursive locking detected 4.14.295-syzkaller #0 Not tainted -------------------------------------------- syz-executor.5/12867 is trying to acquire lock: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] netif_addr_lock_nested include/linux/netdevice.h:3714 [inline] (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] dev_uc_sync_multiple+0x10b/0x1c0 net/core/dev_addr_lists.c:574 but task is already holding lock: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] spin_lock_bh include/linux/spinlock.h:322 [inline] (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] netif_addr_lock_bh include/linux/netdevice.h:3719 [inline] (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] dev_set_rx_mode net/core/dev.c:6729 [inline] (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] __dev_open+0x21b/0x310 net/core/dev.c:1375 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&vlan_netdev_addr_lock_key#2/2); lock(&vlan_netdev_addr_lock_key#2/2); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor.5/12867: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317 #1: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] spin_lock_bh include/linux/spinlock.h:322 [inline] #1: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] netif_addr_lock_bh include/linux/netdevice.h:3719 [inline] #1: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] dev_set_rx_mode net/core/dev.c:6729 [inline] #1: (&vlan_netdev_addr_lock_key#2/2){+...}, at: [] __dev_open+0x21b/0x310 net/core/dev.c:1375 #2: (&dev_addr_list_lock_key#2/1){+...}, at: [] netif_addr_lock_nested include/linux/netdevice.h:3714 [inline] #2: (&dev_addr_list_lock_key#2/1){+...}, at: [] dev_mc_sync+0x10b/0x1c0 net/core/dev_addr_lists.c:765 #3: (rcu_read_lock){....}, at: [] team_set_rx_mode+0x0/0x1e0 drivers/net/team/team.c:514 stack backtrace: CPU: 1 PID: 12867 Comm: syz-executor.5 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_deadlock_bug kernel/locking/lockdep.c:1800 [inline] check_deadlock kernel/locking/lockdep.c:1847 [inline] validate_chain kernel/locking/lockdep.c:2448 [inline] __lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:362 netif_addr_lock_nested include/linux/netdevice.h:3714 [inline] dev_uc_sync_multiple+0x10b/0x1c0 net/core/dev_addr_lists.c:574 team_set_rx_mode+0xb8/0x1e0 drivers/net/team/team.c:1793 __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724 dev_mc_sync+0x17a/0x1c0 net/core/dev_addr_lists.c:768 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:486 __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6724 dev_set_rx_mode net/core/dev.c:6730 [inline] __dev_open+0x223/0x310 net/core/dev.c:1375 __dev_change_flags+0x43f/0x540 net/core/dev.c:6802 dev_change_flags+0x7e/0x130 net/core/dev.c:6868 vlan_device_event+0x1261/0x1ad0 net/8021q/vlan.c:454 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] __dev_notify_flags+0xdf/0x260 net/core/dev.c:6840 dev_change_flags+0xe6/0x130 net/core/dev.c:6873 do_setlink+0x83f/0x2bf0 net/core/rtnetlink.c:2092 rtnl_group_changelink net/core/rtnetlink.c:2512 [inline] rtnl_newlink+0xc9d/0x1830 net/core/rtnetlink.c:2668 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f4ab1f585a9 RSP: 002b:00007f4ab08cb168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4ab2078f80 RCX: 00007f4ab1f585a9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f4ab1fb3580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf6b25c1f R14: 00007f4ab08cb300 R15: 0000000000022000 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. audit: type=1800 audit(1665718894.691:61): pid=12899 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14214 res=0 audit: type=1800 audit(1665718894.691:62): pid=12899 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14214 res=0 mkiss: ax0: crc mode is auto. audit: type=1800 audit(1665718894.901:63): pid=12944 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14214 res=0 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready audit: type=1800 audit(1665718894.931:64): pid=12944 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14214 res=0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. print_req_error: I/O error, dev loop2, sector 0 UBIFS error (pid: 13017): cannot open "u", error -22 NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. MTD: Attempt to mount non-MTD device "/dev/loop4" romfs: Mounting image 'rom 5f663c08' through the block layer netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. MTD: Attempt to mount non-MTD device "/dev/loop4" romfs: Mounting image 'rom 5f663c08' through the block layer l2tp_ppp: tunl 2: set debug=7665642f netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. MTD: Attempt to mount non-MTD device "/dev/loop4" romfs: Mounting image 'rom 5f663c08' through the block layer netlink: 28 bytes leftover after parsing attributes in process `syz-executor.4'. overlayfs: fs on './file0' does not support file handles, falling back to index=off. squashfs: SQUASHFS error: unable to read id index table overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. squashfs: SQUASHFS error: unable to read id index table overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to create directory ./bus/work (errno: 2); mounting read-only squashfs: SQUASHFS error: unable to read id index table overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: failed to create directory ./bus/work (errno: 2); mounting read-only squashfs: SQUASHFS error: unable to read id index table device lo entered promiscuous mode input: syz1 as /devices/virtual/input/input5 overlayfs: fs on './file0' does not support file handles, falling back to index=off. Y­4`Ò˜: renamed from lo overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. input: syz1 as /devices/virtual/input/input6 input: syz1 as /devices/virtual/input/input7 input: syz1 as /devices/virtual/input/input8 device lo entered promiscuous mode overlayfs: fs on './file0' does not support file handles, falling back to index=off. Y­4`Ò˜: renamed from lo device lo entered promiscuous mode overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. device lo entered promiscuous mode Y­4`Ò˜: renamed from lo Y­4`Ò˜: renamed from lo bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered forwarding state overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support xattr. audit: type=1804 audit(1665718901.472:65): pid=13621 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir1128757605/syzkaller.Gupbs5/108/file0" dev="sda1" ino=14265 res=1 F2FS-fs (loop2): Insane cp_payload (2097152 > 510) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): Found nat_bits in checkpoint F2FS-fs (loop2): Mounted with checkpoint version = 753bd00b F2FS-fs (loop2): Insane cp_payload (2097152 > 510) F2FS-fs (loop2): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop2): Found nat_bits in checkpoint