Kernel bug: general protection fault in aead_recvmsg
Subsystem: crypto
Status: fixed

Crash report:
trusted_key: syz.0.17 sent an empty control message without MSG_MORE.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 5987 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:memcpy_sglist+0x420/0x730 crypto/scatterwalk.c:177
Code: e8 b5 b9 52 fd f6 c3 01 0f 85 0a 01 00 00 e8 c7 b4 52 fd 4c 89 f3 eb 07 e8 bd b4 52 fd 31 db 4c 8d 7b 08 4c 89 f8 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 1d 02 00 00 41 8b 07 89 44 24 04 49 8d 7d
RSP: 0018:ffffc900035a7698 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888026dc1e80
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88802543b200 R14: ffff888033865080 R15: 0000000000000008
FS:  000055556d3e1500(0000) GS:ffff888125457000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000004580 CR3: 0000000035e06000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 _aead_recvmsg crypto/algif_aead.c:186 [inline]
 aead_recvmsg+0x719/0x1030 crypto/algif_aead.c:240
 sock_recvmsg_nosec+0x10c/0x140 net/socket.c:1078
 ____sys_recvmsg+0x3e3/0x4a0 net/socket.c:2810
 ___sys_recvmsg+0x215/0x590 net/socket.c:2854
 do_recvmmsg+0x334/0x800 net/socket.c:2949
 __sys_recvmmsg net/socket.c:3023 [inline]
 __do_sys_recvmmsg net/socket.c:3046 [inline]
 __se_sys_recvmmsg net/socket.c:3039 [inline]
 __x64_sys_recvmmsg+0x198/0x250 net/socket.c:3039
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f726eb9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc9ba0f7c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f726ee15fa0 RCX: 00007f726eb9c819
RDX: 0000000000000002 RSI: 0000200000004580 RDI: 0000000000000004
RBP: 00007f726ec32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000060 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f726ee15fac R14: 00007f726ee15fa0 R15: 00007f726ee15fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:memcpy_sglist+0x420/0x730 crypto/scatterwalk.c:177
Code: e8 b5 b9 52 fd f6 c3 01 0f 85 0a 01 00 00 e8 c7 b4 52 fd 4c 89 f3 eb 07 e8 bd b4 52 fd 31 db 4c 8d 7b 08 4c 89 f8 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 1d 02 00 00 41 8b 07 89 44 24 04 49 8d 7d
RSP: 0018:ffffc900035a7698 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888026dc1e80
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88802543b200 R14: ffff888033865080 R15: 0000000000000008
FS:  000055556d3e1500(0000) GS:ffff888125557000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055607067bee0 CR3: 0000000035e06000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	e8 b5 b9 52 fd       	call   0xfd52b9ba
   5:	f6 c3 01             	test   $0x1,%bl
   8:	0f 85 0a 01 00 00    	jne    0x118
   e:	e8 c7 b4 52 fd       	call   0xfd52b4da
  13:	4c 89 f3             	mov    %r14,%rbx
  16:	eb 07                	jmp    0x1f
  18:	e8 bd b4 52 fd       	call   0xfd52b4da
  1d:	31 db                	xor    %ebx,%ebx
  1f:	4c 8d 7b 08          	lea    0x8(%rbx),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 1d 02 00 00    	jne    0x253
  36:	41 8b 07             	mov    (%r15),%eax
  39:	89 44 24 04          	mov    %eax,0x4(%rsp)
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d