EXT4-fs error (device loop4): __ext4_fill_super:5467: inode #2: comm syz-executor.4: iget: special inode unallocated
EXT4-fs (loop4): get root inode failed
EXT4-fs (loop4): mount failed
watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.0:4408]
Modules linked in:
irq event stamp: 306470
hardirqs last  enabled at (306469): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (306470): [<ffffffff84504fff>] sysvec_apic_timer_interrupt+0xf/0x90
softirqs last  enabled at (306464): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
softirqs last disabled at (306441): [<ffffffff8118dda3>] irq_exit_rcu+0x93/0xc0
CPU: 0 PID: 4408 Comm: syz-executor.0 Tainted: G             L     6.4.0-rc6-next-20230613 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:skb_splice_from_iter+0xb6/0xb50
Code: 89 84 24 60 01 00 00 31 c0 e8 86 23 e5 fd 48 63 05 37 e1 6c 02 48 89 44 24 10 48 8d 84 24 e8 00 00 00 48 89 84 24 a8 00 00 00 <49> 8d 47 18 48 89 44 24 60 48 c1 e8 03 80 3c 18 00 0f 85 d4 09 00
RSP: 0018:ffff88803fcb7188 EFLAGS: 00000246
RAX: ffff88803fcb7270 RBX: dffffc0000000000 RCX: ffffc90000fd1000
RDX: 0000000000040000 RSI: ffffffff8366e5da RDI: ffff888010287140
RBP: 0000000008000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000008000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888010287140 R14: ffff888010287140 R15: ffff88803fcb7738
FS:  00007f8a2aa10700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a2a9ef718 CR3: 0000000035f4e000 CR4: 0000000000350ef0
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: 0033:0x7f8a2d4bbb19
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:00007f8a2aa10188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f8a2d5cf020 RCX: 00007f8a2d4bbb19
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007f8a2d515f6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc32059c2f R14: 00007f8a2aa10300 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:	89 84 24 60 01 00 00 	mov    %eax,0x160(%rsp)
   7:	31 c0                	xor    %eax,%eax
   9:	e8 86 23 e5 fd       	callq  0xfde52394
   e:	48 63 05 37 e1 6c 02 	movslq 0x26ce137(%rip),%rax        # 0x26ce14c
  15:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  1a:	48 8d 84 24 e8 00 00 	lea    0xe8(%rsp),%rax
  21:	00
  22:	48 89 84 24 a8 00 00 	mov    %rax,0xa8(%rsp)
  29:	00
* 2a:	49 8d 47 18          	lea    0x18(%r15),%rax <-- trapping instruction
  2e:	48 89 44 24 60       	mov    %rax,0x60(%rsp)
  33:	48 c1 e8 03          	shr    $0x3,%rax
  37:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  3b:	0f                   	.byte 0xf
  3c:	85 d4                	test   %edx,%esp
  3e:	09 00                	or     %eax,(%rax)