8021q: adding VLAN 0 to HW filter on device bond1 bond0: Enslaving bond1 as an active interface with an up link ============================================ WARNING: possible recursive locking detected 4.14.283-syzkaller #0 Not tainted -------------------------------------------- syz-executor.3/17713 is trying to acquire lock: (&(&bond->stats_lock)->rlock#3/3){+.+.}, at: [] bond_get_stats+0xb7/0x440 drivers/net/bonding/bond_main.c:3457 but task is already holding lock: (&(&bond->stats_lock)->rlock#3/3){+.+.}, at: [] bond_get_stats+0xb7/0x440 drivers/net/bonding/bond_main.c:3457 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&bond->stats_lock)->rlock#3/3); lock(&(&bond->stats_lock)->rlock#3/3); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by syz-executor.3/17713: #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: (&(&bond->stats_lock)->rlock#3/3){+.+.}, at: [] bond_get_stats+0xb7/0x440 drivers/net/bonding/bond_main.c:3457 #2: (rcu_read_lock){....}, at: [] bond_get_nest_level drivers/net/bonding/bond_main.c:3446 [inline] #2: (rcu_read_lock){....}, at: [] bond_get_stats+0x9b/0x440 drivers/net/bonding/bond_main.c:3457 stack backtrace: CPU: 1 PID: 17713 Comm: syz-executor.3 Not tainted 4.14.283-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+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 bond_get_stats+0xb7/0x440 drivers/net/bonding/bond_main.c:3457 dev_get_stats+0xa5/0x280 net/core/dev.c:8019 bond_get_stats+0x1da/0x440 drivers/net/bonding/bond_main.c:3463 dev_get_stats+0xa5/0x280 net/core/dev.c:8019 rtnl_fill_stats+0x48/0xa90 net/core/rtnetlink.c:1079 rtnl_fill_ifinfo+0xe16/0x3050 net/core/rtnetlink.c:1385 rtmsg_ifinfo_build_skb+0x8e/0x130 net/core/rtnetlink.c:2915 rtmsg_ifinfo_event net/core/rtnetlink.c:2945 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:2936 [inline] rtnetlink_event+0xee/0x1a0 net/core/rtnetlink.c:4366 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] netdev_features_change net/core/dev.c:1296 [inline] netdev_change_features+0x7e/0xa0 net/core/dev.c:7457 bond_compute_features+0x444/0x860 drivers/net/bonding/bond_main.c:1122 bond_slave_netdev_event drivers/net/bonding/bond_main.c:3191 [inline] bond_netdev_event+0x664/0xbd0 drivers/net/bonding/bond_main.c:3232 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] netdev_features_change net/core/dev.c:1296 [inline] netdev_change_features+0x7e/0xa0 net/core/dev.c:7457 bond_compute_features+0x444/0x860 drivers/net/bonding/bond_main.c:1122 bond_enslave+0x37fb/0x4cf0 drivers/net/bonding/bond_main.c:1757 do_set_master+0x19e/0x200 net/core/rtnetlink.c:1961 rtnl_newlink+0x1356/0x1830 net/core/rtnetlink.c:2759 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: 0033:0x7ff14a453109 RSP: 002b:00007ff148d65168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff14a5661d0 RCX: 00007ff14a453109 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00007ff14a4ad05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd130d3a7f R14: 00007ff148d65300 R15: 0000000000022000 syz-executor.3 (17706) used greatest stack depth: 23752 bytes left bond1: making interface vlan3 the new active one bond1: Enslaving vlan3 as an active interface with an up link bond6: making interface vlan4 the new active one bond6: Enslaving vlan4 as an active interface with an up link device bridge2 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond2 bond0: Enslaving bond2 as an active interface with an up link device bridge3 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond7 bond0: Enslaving bond7 as an active interface with an up link bond2: making interface vlan4 the new active one bond2: Enslaving vlan4 as an active interface with an up link bond7: making interface vlan5 the new active one bond7: Enslaving vlan5 as an active interface with an up link device bridge1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond1 bond0: Enslaving bond1 as an active interface with an up link bond1: making interface vlan3 the new active one bond1: Enslaving vlan3 as an active interface with an up link device bridge3 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond3 bond0: Enslaving bond3 as an active interface with an up link bond3: making interface vlan5 the new active one bond3: Enslaving vlan5 as an active interface with an up link device bridge4 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond8 bond0: Enslaving bond8 as an active interface with an up link bond8: making interface vlan6 the new active one bond8: Enslaving vlan6 as an active interface with an up link device bridge2 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond2 bond0: Enslaving bond2 as an active interface with an up link bond2: making interface vlan4 the new active one bond2: Enslaving vlan4 as an active interface with an up link EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue device bridge4 entered promiscuous mode EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue 8021q: adding VLAN 0 to HW filter on device bond4 bond0: Enslaving bond4 as an active interface with an up link bond4: making interface vlan6 the new active one EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue bond4: Enslaving vlan6 as an active interface with an up link EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue device bridge3 entered promiscuous mode bond3: making interface vlan5 the new active one bond3: Enslaving vlan5 as an active interface with an up link EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device sda1): swap_inode_boot_loader:114: inode #5: comm syz-executor.0: iget: checksum invalid device bridge5 entered promiscuous mode EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue 8021q: adding VLAN 0 to HW filter on device bond5 EXT4-fs error (device sda1): swap_inode_boot_loader:114: inode #5: comm syz-executor.4: iget: checksum invalid bond0: Enslaving bond5 as an active interface with an up link EXT4-fs error (device sda1): swap_inode_boot_loader:114: inode #5: comm syz-executor.2: iget: checksum invalid bond5: making interface vlan7 the new active one bond5: Enslaving vlan7 as an active interface with an up link EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device sda1): swap_inode_boot_loader:114: inode #5: comm syz-executor.0: iget: checksum invalid nla_parse: 16717 callbacks suppressed netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. device bridge6 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device bond6 bond0: Enslaving bond6 as an active interface with an up link netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. bond6: making interface vlan8 the new active one netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. bond6: Enslaving vlan8 as an active interface with an up link netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. blktrace: Concurrent blktraces are not allowed on sg0 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 EXT4-fs error (device sda1): mb_free_blocks:1464: group 5, inode 14684: block 182304:freeing already freed block (bit 18464); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 5, block bitmap and bg descriptor inconsistent: 15226 vs 15235 free clusters EXT4-fs (sda1): pa ffff8880756f0d80: logic 32768, phys. 182272, len 2048 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 5, free 2016, pa_free 2007 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 IPVS: ftp: loaded support on port[0] = 21 EXT4-fs error (device loop2): ext4_fill_super:4382: inode #2: comm syz-executor.2: iget: root inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed print_req_error: 4 callbacks suppressed print_req_error: I/O error, dev loop2, sector 0 buffer_io_error: 4 callbacks suppressed Buffer I/O error on dev loop2, logical block 0, async page read print_req_error: I/O error, dev loop2, sector 6 Buffer I/O error on dev loop2, logical block 3, async page read blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 EXT4-fs error (device sda1): mb_free_blocks:1464: group 7, inode 14674: block 231456:freeing already freed block (bit 2080); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 7, block bitmap and bg descriptor inconsistent: 32725 vs 32734 free clusters EXT4-fs (sda1): pa ffff8880756f0e58: logic 32768, phys. 231424, len 2048 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 7, free 2016, pa_free 2007 EXT4-fs error (device loop2): ext4_fill_super:4382: inode #2: comm syz-executor.2: iget: root inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs (sda1): pa ffff88807547b158: logic 32768, phys. 296960, len 2048 EXT4-fs (sda1): pa ffff88807547b3e0: logic 32768, phys. 395264, len 2048 EXT4-fs (sda1): pa ffff888097817dc0: logic 32768, phys. 360448, len 2048 EXT4-fs (sda1): pa ffff888097817ce8: logic 32768, phys. 430080, len 2048 EXT4-fs (sda1): pa ffff88807547b590: logic 32768, phys. 466944, len 2048 EXT4-fs error (device loop2): ext4_fill_super:4382: inode #2: comm syz-executor.2: iget: root inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed EXT4-fs (sda1): pa ffff88807547b818: logic 32768, phys. 137216, len 2048 EXT4-fs (sda1): pa ffff88807547b8f0: logic 32768, phys. 221184, len 2048 EXT4-fs (sda1): pa ffff8880978178b0: logic 32768, phys. 292864, len 2048 EXT4-fs error (device loop2): ext4_fill_super:4382: inode #2: comm syz-executor.2: iget: root inode unallocated EXT4-fs (loop2): get root inode failed EXT4-fs (loop2): mount failed semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor.0 (18693) triggered the difference, watch for misbehavior. EXT4-fs error: 30 callbacks suppressed EXT4-fs error (device sda1): mb_free_blocks:1464: group 2, inode 14660: block 73249:freeing already freed block (bit 7713); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 2, block bitmap and bg descriptor inconsistent: 857 vs 866 free clusters EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 2, free 479, pa_free 470