============================================
WARNING: possible recursive locking detected
6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 Not tainted
--------------------------------------------
syz-executor.1/6350 is trying to acquire lock:
ffff88805f414da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff88805f414da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: hsr_dev_xmit+0x13e/0x1d0 net/hsr/hsr_device.c:228
but task is already holding lock:
ffff8880789c8da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff8880789c8da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: send_hsr_supervision_frame+0x276/0xad0 net/hsr/hsr_device.c:309
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.1/6350:
#0: ffffc90000007c00 ((&hsr->announce_timer)){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1790
#1: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#1: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#1: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: hsr_announce+0xa3/0x370 net/hsr/hsr_device.c:386
#2: ffff8880789c8da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
#2: ffff8880789c8da0 (&hsr->seqnr_lock){+.-.}-{2:2}, at: send_hsr_supervision_frame+0x276/0xad0 net/hsr/hsr_device.c:309
#3: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#3: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#3: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: hsr_forward_skb+0xae/0x2400 net/hsr/hsr_forward.c:614
#4: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#4: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline]
#4: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x2c7/0x3ca0 net/core/dev.c:4304
#5: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#5: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#5: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: br_dev_xmit+0x1b9/0x1a10 net/bridge/br_device.c:44
#6: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#6: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline]
#6: ffffffff8e334d80 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x2c7/0x3ca0 net/core/dev.c:4304
stack backtrace:
CPU: 0 PID: 6350 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
check_deadlock kernel/locking/lockdep.c:3062 [inline]
validate_chain+0x15c1/0x58e0 kernel/locking/lockdep.c:3856
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
hsr_dev_xmit+0x13e/0x1d0 net/hsr/hsr_device.c:228
__netdev_start_xmit include/linux/netdevice.h:4880 [inline]
netdev_start_xmit include/linux/netdevice.h:4894 [inline]
xmit_one net/core/dev.c:3564 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3580
__dev_queue_xmit+0x1ad1/0x3ca0 net/core/dev.c:4379
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
br_dev_queue_push_xmit+0x701/0x8d0 net/bridge/br_forward.c:53
NF_HOOK+0x3a7/0x460 include/linux/netfilter.h:314
br_forward_finish+0xe5/0x140 net/bridge/br_forward.c:66
NF_HOOK+0x3a7/0x460 include/linux/netfilter.h:314
__br_forward+0x489/0x660 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xb3/0x150 net/bridge/br_forward.c:190
br_flood+0x2e4/0x660 net/bridge/br_forward.c:236
br_dev_xmit+0x118c/0x1a10
__netdev_start_xmit include/linux/netdevice.h:4880 [inline]
netdev_start_xmit include/linux/netdevice.h:4894 [inline]
xmit_one net/core/dev.c:3564 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3580
__dev_queue_xmit+0x1ad1/0x3ca0 net/core/dev.c:4379
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
hsr_xmit net/hsr/hsr_forward.c:380 [inline]
hsr_forward_do net/hsr/hsr_forward.c:471 [inline]
hsr_forward_skb+0x183f/0x2400 net/hsr/hsr_forward.c:619
send_hsr_supervision_frame+0x548/0xad0 net/hsr/hsr_device.c:332
hsr_announce+0x1a9/0x370 net/hsr/hsr_device.c:388
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793
expire_timers kernel/time/timer.c:1844 [inline]
__run_timers kernel/time/timer.c:2418 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2429
run_timer_base kernel/time/timer.c:2438 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448
__do_softirq+0x2c6/0x980 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:refill_stock+0x2bd/0x470 mm/memcontrol.c:2403
Code: 40 42 80 3c 2b 00 74 08 4c 89 f7 e8 ed 5b f7 ff f6 44 24 41 02 75 54 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 66 43 c7 44 25 09 00 00 43 c6 44 25 0b
RSP: 0018:ffffc900135576e0 EFLAGS: 00000206
RAX: a8790ee7698b9100 RBX: 1ffff920026aaee4 RCX: ffffffff94733603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: ffffffff8c1f9740
RBP: ffffc900135577b0 R08: ffffffff8fa91aef R09: 1ffffffff1f5235d
R10: dffffc0000000000 R11: fffffbfff1f5235e R12: 1ffff920026aaee0
R13: dffffc0000000000 R14: ffffc90013557720 R15: 0000000000000246
obj_cgroup_uncharge_pages mm/memcontrol.c:3281 [inline]
refill_obj_stock+0x442/0x6c0 mm/memcontrol.c:3553
__memcg_slab_free_hook+0x106/0x1b0 mm/slub.c:2000
memcg_slab_free_hook mm/slub.c:2020 [inline]
slab_free mm/slub.c:4278 [inline]
kfree+0x1e9/0x3a0 mm/slub.c:4390
__do_replace+0x7e4/0xa40 net/ipv4/netfilter/ip_tables.c:1084
do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
do_ipt_set_ctl+0xf02/0x1250 net/ipv4/netfilter/ip_tables.c:1635
nf_setsockopt+0x295/0x2c0 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x3af/0x720 net/socket.c:2311
__sys_setsockopt+0x1ae/0x250 net/socket.c:2334
__do_sys_setsockopt net/socket.c:2343 [inline]
__se_sys_setsockopt net/socket.c:2340 [inline]
__x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f171647fbfa
Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 b0 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 b0 ff ff ff f7
RSP: 002b:00007ffdefc3cae8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffdefc3cb70 RCX: 00007f171647fbfa
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00000000000002d8 R09: 0079746972756365
R10: 00007f171657e860 R11: 0000000000000202 R12: 00007f171657e800
R13: 00007ffdefc3cb0c R14: 0000000000000000 R15: 00007f171657eec0
----------------
Code disassembly (best guess):
0: 40 rex
1: 42 80 3c 2b 00 cmpb $0x0,(%rbx,%r13,1)
6: 74 08 je 0x10
8: 4c 89 f7 mov %r14,%rdi
b: e8 ed 5b f7 ff call 0xfff75bfd
10: f6 44 24 41 02 testb $0x2,0x41(%rsp)
15: 75 54 jne 0x6b
17: 41 f7 c7 00 02 00 00 test $0x200,%r15d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 20 0e 36 movq $0x45e0360e,0x20(%rsp)
28: e0 45
* 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction
31: 00 00
33: 66 43 c7 44 25 09 00 movw $0x0,0x9(%r13,%r12,1)
3a: 00
3b: 43 rex.XB
3c: c6 .byte 0xc6
3d: 44 rex.R
3e: 25 .byte 0x25
3f: 0b .byte 0xb