watchdog: BUG: soft lockup - CPU#0 stuck for 25s! [syz-executor.7:5130]
Modules linked in:
irq event stamp: 168862
hardirqs last  enabled at (168861): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (168862): [<ffffffff84504fff>] sysvec_apic_timer_interrupt+0xf/0x90
softirqs last  enabled at (168838): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (168833): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
CPU: 0 PID: 5130 Comm: syz-executor.7 Not tainted 6.4.0-rc6-next-20230614 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70
Code: 81 e1 00 01 00 00 65 48 8b 14 25 00 8b 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 9c 14 00 00 85 c0 74 2b 8b 82 78 14 00 00 <83> f8 02 75 20 48 8b 8a 80 14 00 00 8b 92 7c 14 00 00 48 8b 01 48
RSP: 0018:ffff88801c837320 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 000000000000fff8 RCX: 0000000000000000
RDX: ffff8880100f9b40 RSI: ffffffff83c341ab RDI: 0000000000000004
RBP: ffff888033162970 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000010000 R11: 0000000000000001 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888043af5140 R15: 0000000000000001
FS:  00007f3cbc075700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c326000 CR3: 000000001bc8e000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 __ip6_append_data.isra.0+0xb6b/0x4560
 ip6_append_data+0x1d4/0x530
 rawv6_sendmsg+0x156e/0x3dc0
 inet_sendmsg+0x121/0x150
 sock_sendmsg+0x19b/0x200
 splice_to_socket+0x949/0xe10
 direct_splice_actor+0x119/0x180
 splice_direct_to_actor+0x349/0x9d0
 do_splice_direct+0x1bb/0x290
 do_sendfile+0xb4b/0x12f0
 __x64_sys_sendfile64+0x1d5/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f3cbeb20b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3cbc075188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f3cbec34020 RCX: 00007f3cbeb20b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f3cbeb7af6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe58ae38ff R14: 00007f3cbc075300 R15: 0000000000022000
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20
----------------
Code disassembly (best guess):
   0:	81 e1 00 01 00 00    	and    $0x100,%ecx
   6:	65 48 8b 14 25 00 8b 	mov    %gs:0x38b00,%rdx
   d:	03 00
   f:	a9 00 01 ff 00       	test   $0xff0100,%eax
  14:	74 0e                	je     0x24
  16:	85 c9                	test   %ecx,%ecx
  18:	74 35                	je     0x4f
  1a:	8b 82 9c 14 00 00    	mov    0x149c(%rdx),%eax
  20:	85 c0                	test   %eax,%eax
  22:	74 2b                	je     0x4f
  24:	8b 82 78 14 00 00    	mov    0x1478(%rdx),%eax
* 2a:	83 f8 02             	cmp    $0x2,%eax <-- trapping instruction
  2d:	75 20                	jne    0x4f
  2f:	48 8b 8a 80 14 00 00 	mov    0x1480(%rdx),%rcx
  36:	8b 92 7c 14 00 00    	mov    0x147c(%rdx),%edx
  3c:	48 8b 01             	mov    (%rcx),%rax
  3f:	48                   	rex.W