============================================
WARNING: possible recursive locking detected
6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0 Not tainted
--------------------------------------------
syz-executor/13003 is trying to acquire lock:
ffff88806046ae00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff88806046ae00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: hsr_dev_xmit+0x174/0x220 net/hsr/hsr_device.c:228
but task is already holding lock:
ffff88801cf7ee00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff88801cf7ee00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: send_hsr_supervision_frame+0x1dc/0xa60 net/hsr/hsr_device.c:310
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&hsr->seqnr_lock);
lock(&hsr->seqnr_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
7 locks held by syz-executor/13003:
#0: ffffc90000007cb0 ((&hsr->announce_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x610 kernel/time/timer.c:1789
#1: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#1: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#1: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: hsr_announce+0x90/0x380 net/hsr/hsr_device.c:397
#2: ffff88801cf7ee00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
#2: ffff88801cf7ee00 (&hsr->seqnr_lock){+.-.}-{2:2}, at: send_hsr_supervision_frame+0x1dc/0xa60 net/hsr/hsr_device.c:310
#3: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#3: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#3: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: hsr_forward_skb+0xb4/0x2210 net/hsr/hsr_forward.c:681
#4: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#4: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline]
#4: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x4130 net/core/dev.c:4318
#5: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#5: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#5: ffffffff8dbb58e0 (rcu_read_lock){....}-{1:2}, at: br_dev_xmit+0x1a2/0x1890 net/bridge/br_device.c:50
#6: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#6: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline]
#6: ffffffff8dbb5880 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x4130 net/core/dev.c:4318
stack backtrace:
CPU: 0 PID: 13003 Comm: syz-executor Not tainted 6.10.0-rc6-syzkaller-00223-gc6653f49e4fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
check_deadlock kernel/locking/lockdep.c:3062 [inline]
validate_chain kernel/locking/lockdep.c:3856 [inline]
__lock_acquire+0x20e6/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
hsr_dev_xmit+0x174/0x220 net/hsr/hsr_device.c:228
__netdev_start_xmit include/linux/netdevice.h:4882 [inline]
netdev_start_xmit include/linux/netdevice.h:4896 [inline]
xmit_one net/core/dev.c:3578 [inline]
dev_hard_start_xmit+0x146/0x790 net/core/dev.c:3594
__dev_queue_xmit+0x7ba/0x4130 net/core/dev.c:4393
dev_queue_xmit include/linux/netdevice.h:3095 [inline]
br_dev_queue_push_xmit+0x272/0x870 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_forward_finish+0xf5/0x130 net/bridge/br_forward.c:66
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
__br_forward+0x1e5/0x5b0 net/bridge/br_forward.c:115
deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
maybe_deliver+0x31a/0x3e0 net/bridge/br_forward.c:190
br_flood+0x17e/0x5c0 net/bridge/br_forward.c:236
br_dev_xmit+0xf7d/0x1890 net/bridge/br_device.c:106
__netdev_start_xmit include/linux/netdevice.h:4882 [inline]
netdev_start_xmit include/linux/netdevice.h:4896 [inline]
xmit_one net/core/dev.c:3578 [inline]
dev_hard_start_xmit+0x146/0x790 net/core/dev.c:3594
__dev_queue_xmit+0x7ba/0x4130 net/core/dev.c:4393
dev_queue_xmit include/linux/netdevice.h:3095 [inline]
hsr_xmit net/hsr/hsr_forward.c:389 [inline]
hsr_forward_do net/hsr/hsr_forward.c:529 [inline]
hsr_forward_skb+0xc7c/0x2210 net/hsr/hsr_forward.c:686
send_hsr_supervision_frame+0x500/0xa60 net/hsr/hsr_device.c:343
hsr_announce+0x119/0x380 net/hsr/hsr_device.c:399
call_timer_fn+0x1a3/0x610 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers+0x74b/0xaf0 kernel/time/timer.c:2417
__run_timer_base kernel/time/timer.c:2428 [inline]
__run_timer_base kernel/time/timer.c:2421 [inline]
run_timer_base+0x111/0x190 kernel/time/timer.c:2437
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447
handle_softirqs+0x219/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_done arch/x86/include/asm/unwind.h:50 [inline]
RIP: 0010:unwind_get_return_address+0x13/0xe0 arch/x86/kernel/unwind_orc.c:366
Code: 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 54 55 53 48 89 fb e8 70 5d 52 00 48 89 da <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08
RSP: 0018:ffffc90002f9f518 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc90002f9f540 RCX: ffffffff81342a6f
RDX: ffffc90002f9f540 RSI: ffffffff813cd040 RDI: ffffc90002f9f540
RBP: ffffc90002f9f5d0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90002f9f540
R13: ffffffff817acd40 R14: ffffc90002f9f600 R15: ffff888022181e00
arch_stack_walk+0xc1/0x170 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2196 [inline]
slab_free mm/slub.c:4438 [inline]
kfree+0x12a/0x3b0 mm/slub.c:4559
kvfree+0x47/0x50 mm/util.c:680
xt_free_table_info+0xf1/0x220 net/netfilter/x_tables.c:1209
__do_replace+0x758/0x9c0 net/ipv4/netfilter/arp_tables.c:933
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0x94b/0xc40 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x133/0x1a0 net/ipv6/ipv6_sockglue.c:999
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:3765
do_sock_setsockopt+0x225/0x480 net/socket.c:2312
__sys_setsockopt+0x1a4/0x270 net/socket.c:2335
__do_sys_setsockopt net/socket.c:2344 [inline]
__se_sys_setsockopt net/socket.c:2341 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2341
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f796e3779ca
Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7
RSP: 002b:00007fff11770fc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fff11771050 RCX: 00007f796e3779ca
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00000000000003b8 R09: 0079746972756365
R10: 00007f796e4cfce0 R11: 0000000000000202 R12: 00007f796e4cfc80
R13: 00007fff11770fec R14: 0000000000000000 R15: 00007f796e4d1e40
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 00 66 90 add %ah,-0x70(%rsi)
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: f3 0f 1e fa endbr64
1b: 41 54 push %r12
1d: 55 push %rbp
1e: 53 push %rbx
1f: 48 89 fb mov %rdi,%rbx
22: e8 70 5d 52 00 call 0x525d97
27: 48 89 da mov %rbx,%rdx
* 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction
31: fc ff df
34: 48 c1 ea 03 shr $0x3,%rdx
38: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
3c: 84 c0 test %al,%al
3e: 74 08 je 0x48