audit: type=1326 audit(1687169000.669:24): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8489 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f128ff33b19 code=0x0
audit: type=1326 audit(1687169001.503:25): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=8489 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f128ff33b19 code=0x0
watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor.4:8477]
Modules linked in:
irq event stamp: 81096
hardirqs last  enabled at (81095): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (81096): [<ffffffff84507fff>] sysvec_apic_timer_interrupt+0xf/0x90
softirqs last  enabled at (81090): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (81081): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
CPU: 1 PID: 8477 Comm: syz-executor.4 Not tainted 6.4.0-rc6-next-20230616 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:skb_splice_from_iter+0x451/0xb50
Code: 08 e8 43 ed e4 fd 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 58 48 c7 00 00 00 00 00 c7 40 08 00 00 00 00 c7 40 14 00 00 00 00 <48> 8b 84 24 60 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 81 06 00
RSP: 0018:ffff88804388f188 EFLAGS: 00000286
RAX: ffffed1008711e42 RBX: 0000000000000000 RCX: ffffc9000c62c000
RDX: 0000000000040000 RSI: ffffffff8367188d RDI: ffff888016ac0998
RBP: 0000000008000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888016ac08c0 R14: ffff888016ac08c0 R15: ffff88804388f738
FS:  00007f2a4adad700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a606ca720 CR3: 000000000c4d4000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 __ip6_append_data.isra.0+0x1715/0x4560
 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+0xb6b/0x1370
 __x64_sys_sendfile64+0x1d5/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f2a4d89ab19
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:00007f2a4adad188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2a4d9ae1a0 RCX: 00007f2a4d89ab19
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007f2a4d8f4f6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdde34e4cf R14: 00007f2a4adad300 R15: 0000000000022000
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20
----------------
Code disassembly (best guess):
   0:	08 e8                	or     %ch,%al
   2:	43 ed                	rex.XB in (%dx),%eax
   4:	e4 fd                	in     $0xfd,%al
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df
  10:	48 03 44 24 58       	add    0x58(%rsp),%rax
  15:	48 c7 00 00 00 00 00 	movq   $0x0,(%rax)
  1c:	c7 40 08 00 00 00 00 	movl   $0x0,0x8(%rax)
  23:	c7 40 14 00 00 00 00 	movl   $0x0,0x14(%rax)
* 2a:	48 8b 84 24 60 01 00 	mov    0x160(%rsp),%rax <-- trapping instruction
  31:	00
  32:	65 48 2b 04 25 28 00 	sub    %gs:0x28,%rax
  39:	00 00
  3b:	0f                   	.byte 0xf
  3c:	85                   	.byte 0x85
  3d:	81                   	.byte 0x81
  3e:	06                   	(bad)