watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.5:14122]
Modules linked in:
irq event stamp: 258962
hardirqs last  enabled at (258961): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (258962): [<ffffffff84504fff>] sysvec_apic_timer_interrupt+0xf/0x90
softirqs last  enabled at (258930): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (258923): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
CPU: 0 PID: 14122 Comm: syz-executor.5 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:skb_splice_from_iter+0x40/0xb50
Code: 00 00 00 00 00 fc ff df 48 81 ec 68 01 00 00 48 8d 84 24 88 00 00 00 48 89 74 24 38 48 c1 e8 03 48 89 54 24 18 48 89 44 24 58 <48> 01 d8 48 c7 84 24 88 00 00 00 b3 8a b5 41 48 c7 84 24 90 00 00
RSP: 0018:ffff88801804f188 EFLAGS: 00000216
RAX: 1ffff11003009e42 RBX: dffffc0000000000 RCX: 0000000000000cc0
RDX: 0000000000000001 RSI: ffff88801804f738 RDI: ffff888045c54c80
RBP: 0000000008000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000008000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888045c54c80 R14: ffff888045c54c80 R15: ffff88801804f738
FS:  00007f4298d53700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c530000 CR3: 000000001f89a000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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+0xb4b/0x12f0
 __x64_sys_sendfile64+0x1d5/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f429b7feb19
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:00007f4298d53188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f429b912020 RCX: 00007f429b7feb19
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007f429b858f6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdcba9fd6f R14: 00007f4298d53300 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), 7 bytes skipped:
   0:	df 48 81             	fisttps -0x7f(%rax)
   3:	ec                   	in     (%dx),%al
   4:	68 01 00 00 48       	pushq  $0x48000001
   9:	8d 84 24 88 00 00 00 	lea    0x88(%rsp),%eax
  10:	48 89 74 24 38       	mov    %rsi,0x38(%rsp)
  15:	48 c1 e8 03          	shr    $0x3,%rax
  19:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  1e:	48 89 44 24 58       	mov    %rax,0x58(%rsp)
* 23:	48 01 d8             	add    %rbx,%rax <-- trapping instruction
  26:	48 c7 84 24 88 00 00 	movq   $0x41b58ab3,0x88(%rsp)
  2d:	00 b3 8a b5 41
  32:	48                   	rex.W
  33:	c7                   	.byte 0xc7
  34:	84 24 90             	test   %ah,(%rax,%rdx,4)