============================================
WARNING: possible recursive locking detected
6.5.0-rc7-syzkaller-00004-gf7757129e3de #0 Not tainted
--------------------------------------------
syz-executor.2/13310 is trying to acquire lock:
ffff8880a2bcd330 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff8880a2bcd330 (&br->multicast_lock){+.-.}-{2:2}, at: br_ip6_multicast_query net/bridge/br_multicast.c:3518 [inline]
ffff8880a2bcd330 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_ipv6_rcv net/bridge/br_multicast.c:3914 [inline]
ffff8880a2bcd330 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_rcv+0x21b6/0x6730 net/bridge/br_multicast.c:3969
but task is already holding lock:
ffff88809f50d330 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88809f50d330 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_port_query_expired+0x61/0x350 net/bridge/br_multicast.c:1900
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&br->multicast_lock);
lock(&br->multicast_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
8 locks held by syz-executor.2/13310:
#0: ffff88809ffeb2f8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:654 [inline]
#0: ffff88809ffeb2f8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x215/0xaa0 mm/memory.c:5393
#1: ffffc90000007ce0 ((&pmctx->ip6_own_query.timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:31 [inline]
#1: ffffc90000007ce0 ((&pmctx->ip6_own_query.timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x580 kernel/time/timer.c:1690
#2: ffff88809f50d330 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff88809f50d330 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_port_query_expired+0x61/0x350 net/bridge/br_multicast.c:1900
#3: ffffffff8c9a73a0 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x257/0x3f20 net/core/dev.c:4120
#4: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: is_netpoll_tx_blocked include/net/bonding.h:108 [inline]
#4: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: bond_start_xmit+0x8e/0x1260 drivers/net/bonding/bond_main.c:5503
#5: ffffffff8c9a73a0 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x257/0x3f20 net/core/dev.c:4120
#6: ffffffff8c9a73a0 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x257/0x3f20 net/core/dev.c:4120
#7: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
#7: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: br_tc_skb_miss_set net/bridge/br_private.h:763 [inline]
#7: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: br_dev_xmit+0xf0/0x1970 net/bridge/br_device.c:42
stack backtrace:
CPU: 0 PID: 13310 Comm: syz-executor.2 Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_deadlock kernel/locking/lockdep.c:3070 [inline]
validate_chain kernel/locking/lockdep.c:3863 [inline]
__lock_acquire+0x2971/0x5de0 kernel/locking/lockdep.c:5144
lock_acquire kernel/locking/lockdep.c:5761 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
br_ip6_multicast_query net/bridge/br_multicast.c:3518 [inline]
br_multicast_ipv6_rcv net/bridge/br_multicast.c:3914 [inline]
br_multicast_rcv+0x21b6/0x6730 net/bridge/br_multicast.c:3969
br_dev_xmit+0x786/0x1970 net/bridge/br_device.c:90
__netdev_start_xmit include/linux/netdevice.h:4910 [inline]
netdev_start_xmit include/linux/netdevice.h:4924 [inline]
xmit_one net/core/dev.c:3537 [inline]
dev_hard_start_xmit+0x13d/0x6c0 net/core/dev.c:3553
__dev_queue_xmit+0xa55/0x3f20 net/core/dev.c:4203
dev_queue_xmit include/linux/netdevice.h:3088 [inline]
vlan_dev_hard_start_xmit+0x3af/0x5c0 net/8021q/vlan_dev.c:125
__netdev_start_xmit include/linux/netdevice.h:4910 [inline]
netdev_start_xmit include/linux/netdevice.h:4924 [inline]
xmit_one net/core/dev.c:3537 [inline]
dev_hard_start_xmit+0x13d/0x6c0 net/core/dev.c:3553
__dev_queue_xmit+0xa55/0x3f20 net/core/dev.c:4203
dev_queue_xmit include/linux/netdevice.h:3088 [inline]
bond_dev_queue_xmit+0xc9/0x170 drivers/net/bonding/bond_main.c:308
bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:5226 [inline]
__bond_start_xmit drivers/net/bonding/bond_main.c:5480 [inline]
bond_start_xmit+0x457/0x1260 drivers/net/bonding/bond_main.c:5508
__netdev_start_xmit include/linux/netdevice.h:4910 [inline]
netdev_start_xmit include/linux/netdevice.h:4924 [inline]
xmit_one net/core/dev.c:3537 [inline]
dev_hard_start_xmit+0x13d/0x6c0 net/core/dev.c:3553
__dev_queue_xmit+0xa55/0x3f20 net/core/dev.c:4203
dev_queue_xmit include/linux/netdevice.h:3088 [inline]
br_dev_queue_push_xmit+0x26e/0x7b0 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:303 [inline]
__br_multicast_send_query+0x238b/0x4110 net/bridge/br_multicast.c:1804
br_multicast_send_query+0x2ce/0x540 net/bridge/br_multicast.c:1883
br_multicast_port_query_expired+0x288/0x350 net/bridge/br_multicast.c:1908
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x764/0xb10 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x218/0x965 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x50/0x70 kernel/kcov.c:212
Code: 0e 85 c9 74 35 8b 82 04 16 00 00 85 c0 74 2b 8b 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00 8b 92 e4 15 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 c3 66 66 2e 0f 1f
RSP: 0000:ffffc9000cb47d20 EFLAGS: 00000246
RAX: 000000000003ffff RBX: 00000000a3a3b067 RCX: ffffc90023e81000
RDX: 0000000000040000 RSI: ffffffff81c5eb6c RDI: 0000000000000007
RBP: 0400000000000000 R08: 0000000000000007 R09: 0000000000000080
R10: 0000000000000000 R11: 0000000000000000 R12: 000000009848f007
R13: dffffc0000000000 R14: ffff88802c6e6f00 R15: 0000000000000020
pud_devmap arch/x86/include/asm/pgtable.h:263 [inline]
__handle_mm_fault+0x36c/0x3b80 mm/memory.c:5023
handle_mm_fault+0x2ab/0x9d0 mm/memory.c:5233
do_user_addr_fault+0x2e7/0xfc0 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1486 [inline]
exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1542
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f4fcee286e6
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007f4fcfb6c520 EFLAGS: 00010206
RAX: 0000000000710001 RBX: 00007f4fcfb6c5c0 RCX: 0000000000000024
RDX: 0000000000000005 RSI: 0000000000000001 RDI: 00007f4fcfb6c660
RBP: 0000000000000102 R08: 00007f4fc55ff000 R09: 0000000000710000
R10: 0000000000000000 R11: 00007f4fcfb6c5d0 R12: 0000000000000001
R13: 00007f4fceeea360 R14: 0000000000000000 R15: 00007f4fcfb6c660
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 85 c9 test %ecx,%ecx
2: 74 35 je 0x39
4: 8b 82 04 16 00 00 mov 0x1604(%rdx),%eax
a: 85 c0 test %eax,%eax
c: 74 2b je 0x39
e: 8b 82 e0 15 00 00 mov 0x15e0(%rdx),%eax
14: 83 f8 02 cmp $0x2,%eax
17: 75 20 jne 0x39
19: 48 8b 8a e8 15 00 00 mov 0x15e8(%rdx),%rcx
20: 8b 92 e4 15 00 00 mov 0x15e4(%rdx),%edx
26: 48 8b 01 mov (%rcx),%rax
* 29: 48 83 c0 01 add $0x1,%rax <-- trapping instruction
2d: 48 39 d0 cmp %rdx,%rax
30: 73 07 jae 0x39
32: 48 89 01 mov %rax,(%rcx)
35: 48 89 34 c1 mov %rsi,(%rcx,%rax,8)
39: c3 ret
3a: 66 data16
3b: 66 data16
3c: 2e cs
3d: 0f .byte 0xf
3e: 1f (bad)