============================================
WARNING: possible recursive locking detected
5.16.0-rc8-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.0/3632 is trying to acquire lock:
ffff88802df6d3b8 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
ffff88802df6d3b8 (&br->multicast_lock){+.-.}-{2:2}, at: br_ip6_multicast_query net/bridge/br_multicast.c:3341 [inline]
ffff88802df6d3b8 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_ipv6_rcv net/bridge/br_multicast.c:3737 [inline]
ffff88802df6d3b8 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_rcv+0x16dc/0x6230 net/bridge/br_multicast.c:3792
but task is already holding lock:
ffff8880788b53b8 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
ffff8880788b53b8 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_port_query_expired+0x61/0x360 net/bridge/br_multicast.c:1742
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
11 locks held by syz-executor.0/3632:
#0: ffffffff8bc5a3b0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:497 [inline]
#0: ffffffff8bc5a3b0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm+0x108/0x13e0 kernel/fork.c:1450
#1: ffff88801c69b228 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
#1: ffff88801c69b228 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap kernel/fork.c:498 [inline]
#1: ffff88801c69b228 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mm+0x12e/0x13e0 kernel/fork.c:1450
#2: ffff88802efcdc28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
#2: ffff88802efcdc28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap kernel/fork.c:507 [inline]
#2: ffff88802efcdc28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mm+0x18a/0x13e0 kernel/fork.c:1450
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: copy_pte_range mm/memory.c:1024 [inline]
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: copy_pmd_range mm/memory.c:1159 [inline]
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: copy_pud_range mm/memory.c:1196 [inline]
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: copy_p4d_range mm/memory.c:1220 [inline]
#3: ffff888030528a38 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: copy_page_range+0xc16/0x42c0 mm/memory.c:1293
#4: ffff888074626e58 (ptlock_ptr(page)#2/1){+.+.}-{2:2}, at: copy_pte_range mm/memory.c:1031 [inline]
#4: ffff888074626e58 (ptlock_ptr(page)#2/1){+.+.}-{2:2}, at: copy_pmd_range mm/memory.c:1159 [inline]
#4: ffff888074626e58 (ptlock_ptr(page)#2/1){+.+.}-{2:2}, at: copy_pud_range mm/memory.c:1196 [inline]
#4: ffff888074626e58 (ptlock_ptr(page)#2/1){+.+.}-{2:2}, at: copy_p4d_range mm/memory.c:1220 [inline]
#4: ffff888074626e58 (ptlock_ptr(page)#2/1){+.+.}-{2:2}, at: copy_page_range+0xceb/0x42c0 mm/memory.c:1293
#5: ffffc90000007d70 ((&pmctx->ip6_own_query.timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:35 [inline]
#5: ffffc90000007d70 ((&pmctx->ip6_own_query.timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1411
#6: ffff8880788b53b8 (&br->multicast_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
#6: ffff8880788b53b8 (&br->multicast_lock){+.-.}-{2:2}, at: br_multicast_port_query_expired+0x61/0x360 net/bridge/br_multicast.c:1742
#7: ffffffff8bb83d40 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x1e3/0x3640 net/core/dev.c:4040
#8: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: is_netpoll_tx_blocked include/net/bonding.h:109 [inline]
#8: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: bond_start_xmit+0x88/0x1220 drivers/net/bonding/bond_main.c:5132
#9: ffffffff8bb83d40 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x1e3/0x3640 net/core/dev.c:4040
#10: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: br_dev_xmit+0x0/0x16c0 net/bridge/br_device.c:309
stack backtrace:
CPU: 0 PID: 3632 Comm: syz-executor.0 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]
check_deadlock kernel/locking/lockdep.c:2999 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
br_ip6_multicast_query net/bridge/br_multicast.c:3341 [inline]
br_multicast_ipv6_rcv net/bridge/br_multicast.c:3737 [inline]
br_multicast_rcv+0x16dc/0x6230 net/bridge/br_multicast.c:3792
br_dev_xmit+0x6f6/0x16c0 net/bridge/br_device.c:89
__netdev_start_xmit include/linux/netdevice.h:4682 [inline]
netdev_start_xmit include/linux/netdevice.h:4696 [inline]
xmit_one net/core/dev.c:3473 [inline]
dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489
__dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4116
bond_dev_queue_xmit+0xc3/0x170 drivers/net/bonding/bond_main.c:306
bond_3ad_xor_xmit drivers/net/bonding/bond_main.c:4875 [inline]
__bond_start_xmit drivers/net/bonding/bond_main.c:5109 [inline]
bond_start_xmit+0xb01/0x1220 drivers/net/bonding/bond_main.c:5137
__netdev_start_xmit include/linux/netdevice.h:4682 [inline]
netdev_start_xmit include/linux/netdevice.h:4696 [inline]
xmit_one net/core/dev.c:3473 [inline]
dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3489
__dev_queue_xmit+0x2983/0x3640 net/core/dev.c:4116
br_dev_queue_push_xmit+0x25a/0x740 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:307 [inline]
__br_multicast_send_query+0x118d/0x3aa0 net/bridge/br_multicast.c:1646
br_multicast_send_query+0x266/0x4b0 net/bridge/br_multicast.c:1725
br_multicast_port_query_expired+0x2c3/0x360 net/bridge/br_multicast.c:1750
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:kasan_check_range+0x12b/0x180 mm/kasan/generic.c:190
Code: 3a 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a <5b> b8 01 00 00 00 5d 41 5c c3 44 89 c2 e8 53 ef ff ff 5b 83 f0 01
RSP: 0018:ffffc900027ff7e0 EFLAGS: 00000246
RAX: fffff940002bf4c1 RBX: fffff940002bf4c1 RCX: ffffffff81ae6d06
RDX: fffff940002bf4c1 RSI: 0000000000000008 RDI: ffffea00015fa600
RBP: fffff940002bf4c0 R08: 0000000000000000 R09: ffffea00015fa607
R10: fffff940002bf4c0 R11: 0000000000000000 R12: ffffea00015fa600
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
PageSwapBacked include/linux/page-flags.h:446 [inline]
mm_counter_file include/linux/mm.h:2068 [inline]
mm_counter include/linux/mm.h:2077 [inline]
copy_present_pte mm/memory.c:959 [inline]
copy_pte_range mm/memory.c:1073 [inline]
copy_pmd_range mm/memory.c:1159 [inline]
copy_pud_range mm/memory.c:1196 [inline]
copy_p4d_range mm/memory.c:1220 [inline]
copy_page_range+0x1806/0x42c0 mm/memory.c:1293
dup_mmap kernel/fork.c:609 [inline]
dup_mm+0xa4e/0x13e0 kernel/fork.c:1450
copy_mm kernel/fork.c:1502 [inline]
copy_process+0x6fed/0x75a0 kernel/fork.c:2191
kernel_clone+0xe7/0xab0 kernel/fork.c:2582
__do_sys_clone+0xc8/0x110 kernel/fork.c:2699
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3942f0148b
Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00
RSP: 002b:00007fffd8e86290 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3942f0148b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555556388400
R10: 00005555563886d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffd8e86370
----------------
Code disassembly (best guess):
0: 3a 00 cmp (%rax),%al
2: 74 ef je 0xfffffff3
4: 49 8d 04 2c lea (%r12,%rbp,1),%rax
8: 48 85 d2 test %rdx,%rdx
b: 75 0b jne 0x18
d: 48 89 da mov %rbx,%rdx
10: 48 29 c2 sub %rax,%rdx
13: e9 55 ff ff ff jmpq 0xffffff6d
18: 49 39 d2 cmp %rdx,%r10
1b: 75 17 jne 0x34
1d: 49 0f be 02 movsbq (%r10),%rax
21: 41 83 e1 07 and $0x7,%r9d
25: 49 39 c1 cmp %rax,%r9
28: 7d 0a jge 0x34
* 2a: 5b pop %rbx <-- trapping instruction
2b: b8 01 00 00 00 mov $0x1,%eax
30: 5d pop %rbp
31: 41 5c pop %r12
33: c3 retq
34: 44 89 c2 mov %r8d,%edx
37: e8 53 ef ff ff callq 0xffffef8f
3c: 5b pop %rbx
3d: 83 f0 01 xor $0x1,%eax