------------[ cut here ]------------
WARNING: CPU: 2 PID: 11774 at kernel/signal.c:2050 posixtimer_send_sigqueue+0xba8/0x1020 kernel/signal.c:2050
Modules linked in:
CPU: 2 UID: 0 PID: 11774 Comm: syz-executor Not tainted 6.13.0-rc3-syzkaller-00073-geabcdba3ad40 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:posixtimer_send_sigqueue+0xba8/0x1020 kernel/signal.c:2050
Code: ff ff 4c 89 e7 e8 78 f8 9d 00 e9 7e f8 ff ff 41 bf 02 00 00 00 e9 87 f8 ff ff 48 89 54 24 10 48 89 44 24 08 e8 79 52 3b 00 90 <0f> 0b 90 48 8d 7b 10 48 8b 44 24 08 48 b9 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000658d50 EFLAGS: 00010046
RAX: 0000000000010003 RBX: ffff888026f5c780 RCX: 1ffff11004deb8f3
RDX: ffff888029f48000 RSI: ffffffff815ec2d7 RDI: 0000000000000001
RBP: ffff888044a80000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffff888026f5c824
R13: 1ffff920000cb1af R14: ffff888026f5c858 R15: ffff888026f5c840
FS: 000055557a2bb500(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2ab6969ae0 CR3: 00000000512fa000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000008 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
posix_timer_fn+0x31/0x60 kernel/time/posix-timers.c:323
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211
Code: 00 e8 90 08 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 1e 69 20 00 48 85 db 0f 85 55 01 00 00 e8 a0 66 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 95 0c 83
RSP: 0018:ffffc9000430ee40 EFLAGS: 00000293
RAX: ffffffff8ee936b8 RBX: 0000000000000000 RCX: ffffffff8179aea2
RDX: ffff888029f48000 RSI: ffffffff8179aeb0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000004 R12: ffffffff8ee936b8
R13: ffffffff8ee93660 R14: ffffc9000430eed0 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86
_printk+0xc8/0x100 kernel/printk/printk.c:2457
br_set_state+0x378/0x880 net/bridge/br_stp.c:57
br_init_port+0xc6/0x250 net/bridge/br_stp_if.c:39
new_nbp net/bridge/br_if.c:442 [inline]
br_add_if+0x5db/0x1b70 net/bridge/br_if.c:599
do_set_master+0x1bc/0x230 net/core/rtnetlink.c:2917
do_setlink.constprop.0+0xb5b/0x3f80 net/core/rtnetlink.c:3116
rtnl_changelink net/core/rtnetlink.c:3723 [inline]
__rtnl_newlink net/core/rtnetlink.c:3874 [inline]
rtnl_newlink+0x1303/0x1d60 net/core/rtnetlink.c:4011
rtnetlink_rcv_msg+0x95b/0xea0 net/core/rtnetlink.c:6921
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2542
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
__sys_sendto+0x488/0x4f0 net/socket.c:2197
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200
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: 0033:0x7f6a2c587bbc
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007fff7c52cc00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f6a2d2a4620 RCX: 00007f6a2c587bbc
RDX: 0000000000000028 RSI: 00007f6a2d2a4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff7c52cc54 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f6a2d2a4670 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 00 e8 add %ch,%al
2: 90 nop
3: 08 28 or %ch,(%rax)
5: 00 9c 5b 81 e3 00 02 add %bl,0x200e381(%rbx,%rbx,2)
c: 00 00 add %al,(%rax)
e: 31 ff xor %edi,%edi
10: 48 89 de mov %rbx,%rsi
13: e8 1e 69 20 00 call 0x206936
18: 48 85 db test %rbx,%rbx
1b: 0f 85 55 01 00 00 jne 0x176
21: e8 a0 66 20 00 call 0x2066c6
26: fb sti
27: 4c 89 e0 mov %r12,%rax
* 2a: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction
2e: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
33: 0f 84 11 ff ff ff je 0xffffff4a
39: 4c 89 e7 mov %r12,%rdi
3c: e8 .byte 0xe8
3d: 95 xchg %eax,%ebp
3e: 0c 83 or $0x83,%al