============================================
WARNING: possible recursive locking detected
6.12.0-syzkaller-05480-gfcc79e1714e8 #0 Not tainted
--------------------------------------------
syz-executor/5846 is trying to acquire lock:
ffff888061984f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff888061984f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: hsr_dev_xmit+0x18a/0x210 net/hsr/hsr_device.c:234
but task is already holding lock:
ffff888078f08f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
ffff888078f08f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: send_hsr_supervision_frame+0x27c/0xcc0 net/hsr/hsr_device.c:317
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
10 locks held by syz-executor/5846:
#0: ffff88805f25a420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88801d733708 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff88801d733708 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4574
#2: ffffffff8f2319f0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
#2: ffffffff8f2319f0 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
#2: ffffffff8f2319f0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline]
#2: ffffffff8f2319f0 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_perm+0x287/0x740 security/tomoyo/file.c:821
#3: ffffc90000a18c00 ((&hsr->announce_timer)){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1790
#4: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#4: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#4: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: hsr_announce+0xaa/0x3a0 net/hsr/hsr_device.c:406
#5: ffff888078f08f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
#5: ffff888078f08f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: send_hsr_supervision_frame+0x27c/0xcc0 net/hsr/hsr_device.c:317
#6: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#6: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#6: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: hsr_forward_skb+0xb6/0x2ac0 net/hsr/hsr_forward.c:723
#7: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#7: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:901 [inline]
#7: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2f4/0x3f50 net/core/dev.c:4359
#8: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#8: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#8: ffffffff8eb3c860 (rcu_read_lock){....}-{1:3}, at: br_dev_xmit+0x21d/0x1b40 net/bridge/br_device.c:50
#9: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#9: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:901 [inline]
#9: ffffffff8eb3c8c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2f4/0x3f50 net/core/dev.c:4359
stack backtrace:
CPU: 1 UID: 0 PID: 5846 Comm: syz-executor Not tainted 6.12.0-syzkaller-05480-gfcc79e1714e8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037
check_deadlock kernel/locking/lockdep.c:3089 [inline]
validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__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+0x18a/0x210 net/hsr/hsr_device.c:234
__netdev_start_xmit include/linux/netdevice.h:5002 [inline]
netdev_start_xmit include/linux/netdevice.h:5011 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3606
__dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434
dev_queue_xmit include/linux/netdevice.h:3168 [inline]
br_dev_queue_push_xmit+0x726/0x900 net/bridge/br_forward.c:53
NF_HOOK+0x3a7/0x460 include/linux/netfilter.h:314
br_forward_finish+0xd8/0x130 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
br_dev_xmit+0x1202/0x1b40
__netdev_start_xmit include/linux/netdevice.h:5002 [inline]
netdev_start_xmit include/linux/netdevice.h:5011 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3606
__dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434
dev_queue_xmit include/linux/netdevice.h:3168 [inline]
hsr_xmit net/hsr/hsr_forward.c:430 [inline]
hsr_forward_do net/hsr/hsr_forward.c:571 [inline]
hsr_forward_skb+0x171c/0x2ac0 net/hsr/hsr_forward.c:728
send_hsr_supervision_frame+0x63b/0xcc0 net/hsr/hsr_device.c:351
hsr_announce+0x1f8/0x3a0 net/hsr/hsr_device.c:408
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:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655
irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:format_decode+0x21/0x1bb0 lib/vsprintf.c:2511
Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 48 89 74 24 10 <49> 89 fd 65 48 8b 04 25 28 00 00 00 48 89 84 24 a0 00 00 00 49 be
RSP: 0018:ffffc90003e1f660 EFLAGS: 00000286
RAX: ffffc90003e1f8f0 RBX: 0000000000000000 RCX: ffffc90003e1f8e8
RDX: ffff88802aca9e00 RSI: ffffc90003e1f7e0 RDI: ffffffff8c7b7920
RBP: ffffc90003e1f750 R08: ffffffff8bd2f98d R09: 0000000000000000
R10: ffffc90003e1f920 R11: fffff520007c3f2a R12: ffffc90003e1f7e0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8c7b7920
vsnprintf+0x14f/0x1da0 lib/vsprintf.c:2755
tomoyo_supervisor+0x117/0x11f0 security/tomoyo/common.c:2061
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission+0x243/0x360 security/tomoyo/file.c:587
tomoyo_path_perm+0x490/0x740 security/tomoyo/file.c:838
tomoyo_path_unlink+0xd0/0x110 security/tomoyo/tomoyo.c:162
security_path_unlink+0x169/0x360 security/security.c:1961
do_unlinkat+0x3e6/0x830 fs/namei.c:4584
__do_sys_unlink fs/namei.c:4635 [inline]
__se_sys_unlink fs/namei.c:4633 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4633
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f973017ddc7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdbf89a6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f973017ddc7
RDX: 00007ffdbf89a710 RSI: 00007ffdbf89a7a0 RDI: 00007ffdbf89a7a0
RBP: 00007ffdbf89a7a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffdbf89b820
R13: 00007f97301f15fc R14: 000000000002c304 R15: 00007ffdbf89b860
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: f3 0f 1e fa endbr64
d: 55 push %rbp
e: 48 89 e5 mov %rsp,%rbp
11: 41 57 push %r15
13: 41 56 push %r14
15: 41 55 push %r13
17: 41 54 push %r12
19: 53 push %rbx
1a: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
1e: 48 81 ec c0 00 00 00 sub $0xc0,%rsp
25: 48 89 74 24 10 mov %rsi,0x10(%rsp)
* 2a: 49 89 fd mov %rdi,%r13 <-- trapping instruction
2d: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
34: 00 00
36: 48 89 84 24 a0 00 00 mov %rax,0xa0(%rsp)
3d: 00
3e: 49 rex.WB
3f: be .byte 0xbe