============================================
WARNING: possible recursive locking detected
4.14.275-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.2/10849 is trying to acquire lock:
(&(&bond->stats_lock)->rlock#3/3){+.+.}, at: [<ffffffff83caf297>] 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: [<ffffffff83caf297>] 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.2/10849:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c873fd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c873fd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
#1: (&(&bond->stats_lock)->rlock#3/3){+.+.}, at: [<ffffffff83caf297>] bond_get_stats+0xb7/0x440 drivers/net/bonding/bond_main.c:3457
#2: (rcu_read_lock){....}, at: [<ffffffff83caf27b>] bond_get_nest_level drivers/net/bonding/bond_main.c:3446 [inline]
#2: (rcu_read_lock){....}, at: [<ffffffff83caf27b>] bond_get_stats+0x9b/0x440 drivers/net/bonding/bond_main.c:3457
stack backtrace:
CPU: 0 PID: 10849 Comm: syz-executor.2 Not tainted 4.14.275-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:2446
netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320
netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1891
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: 0033:0x7fda3f25b0e9
RSP: 002b:00007fda3dbd0168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fda3f36df60 RCX: 00007fda3f25b0e9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007fda3f2b508d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffcf63647f R14: 00007fda3dbd0300 R15: 0000000000022000
bond1: making interface vlan2 the new active one
device bridge1 entered promiscuous mode
bond1: Enslaving vlan2 as an active interface with an up link
syz-executor.2 (10849) used greatest stack depth: 23792 bytes left
audit: type=1804 audit(1650068151.312:28): pid=10948 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/26/bus" dev="sda1" ino=14020 res=1
8021q: adding VLAN 0 to HW filter on device batadv1
EXT4-fs warning (device sda1): ext4_group_extend:1807: will only finish group (524288 blocks, 256 new)
bond0: Enslaving batadv1 as an active interface with an up link
EXT4-fs warning (device sda1): ext4_group_extend:1813: can't read last block, resize aborted
audit: type=1804 audit(1650068151.342:29): pid=10948 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/26/bus" dev="sda1" ino=14020 res=1
audit: type=1804 audit(1650068151.432:30): pid=10966 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/27/bus" dev="sda1" ino=14023 res=1
audit: type=1804 audit(1650068151.432:31): pid=10966 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/27/bus" dev="sda1" ino=14023 res=1
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'.
audit: type=1804 audit(1650068151.542:32): pid=11022 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/28/bus" dev="sda1" ino=14019 res=1
8021q: adding VLAN 0 to HW filter on device bond2
audit: type=1804 audit(1650068151.542:33): pid=11015 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2496986327/syzkaller.Ri2E1E/28/bus" dev="sda1" ino=14019 res=1
bond0: Enslaving bond2 as an active interface with an up link
device bridge2 entered promiscuous mode
device bridge2 left promiscuous mode
bond2: making interface vlan3 the new active one
device bridge2 entered promiscuous mode
bond2: Enslaving vlan3 as an active interface with an up link
8021q: adding VLAN 0 to HW filter on device batadv3
bond0: Enslaving batadv3 as an active interface with an up link
8021q: adding VLAN 0 to HW filter on device batadv1
bond0: Enslaving batadv1 as an active interface with an up link
8021q: adding VLAN 0 to HW filter on device bond3
bond0: Enslaving bond3 as an active interface with an up link
8021q: adding VLAN 0 to HW filter on device batadv5
bond0: Enslaving batadv5 as an active interface with an up link
audit: type=1804 audit(1650068152.052:34): pid=11192 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir1924936537/syzkaller.r65ZOV/24/bus" dev="sda1" ino=14033 res=1
audit: type=1804 audit(1650068152.052:35): pid=11192 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir1924936537/syzkaller.r65ZOV/24/bus" dev="sda1" ino=14033 res=1
8021q: adding VLAN 0 to HW filter on device batadv1
bond0: Enslaving batadv1 as an active interface with an up link
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'.
8021q: adding VLAN 0 to HW filter on device bond1
bond0: Enslaving bond1 as an active interface with an up link
device bridge1 entered promiscuous mode
device bridge1 left promiscuous mode
bond1: making interface vlan2 the new active one
device bridge1 entered promiscuous mode
bond1: Enslaving vlan2 as an active interface with an up link
8021q: adding VLAN 0 to HW filter on device batadv3
bond0: Enslaving batadv3 as an active interface with an up link
ufs: ufs was compiled with read-only support, can't be mounted as read-write
ufs: ufs was compiled with read-only support, can't be mounted as read-write
ufs: ufs was compiled with read-only support, can't be mounted as read-write
ufs: ufs was compiled with read-only support, can't be mounted as read-write
ntfs: (device loop1): parse_options(): Option utf8 is no longer supported, using option nls=utf8. Please use option nls=utf8 in the future and make sure utf8 is compiled either as a module or into the kernel.
ntfs: (device loop1): parse_options(): NLS character set macr#�e�WH�y��6�oman not found. Using previous one utf8.
ntfs: (device loop1): parse_options(): Unrecognized mount option case_sensitive�yes.
ntfs: (device loop1): parse_options(): The uid option requires an argument.