erofs: read_super, device -> /dev/loop0
erofs: options -> 
erofs: cannot find valid erofs superblock
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19329 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline]
RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:55
Code: ff df 80 3c 02 00 0f 85 98 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 9f 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffff88802be87238 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 000000000000401d RCX: ffffc90006c36000
RDX: 0000000000000001 RSI: ffffffff83739e63 RDI: 0000000000000007
RBP: 000000000000401d R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000001000 R14: ffff88802be872e8 R15: 0000000000000001
FS:  00007fe497097700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005636c44e0068 CR3: 00000000b4ae4000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline]
 scatterwalk_map_and_copy+0x121/0x1a0 crypto/scatterwalk.c:60
 gcmaes_encrypt.constprop.0+0x89f/0xd90 arch/x86/crypto/aesni-intel_glue.c:980
Modules linked in:
---[ end trace 3edc7bfcd6cf3f53 ]---
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:73 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:98 [inline]
RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:55
Code: ff df 80 3c 02 00 0f 85 98 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 9f 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffff88802be87238 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 000000000000401d RCX: ffffc90006c36000
RDX: 0000000000000001 RSI: ffffffff83739e63 RDI: 0000000000000007
RBP: 000000000000401d R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000001000 R14: ffff88802be872e8 R15: 0000000000000001
FS:  00007fe497097700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fc3a000 CR3: 00000000b4ae4000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	df 80 3c 02 00 0f    	filds  0xf00023c(%rax)
   6:	85 98 01 00 00 49    	test   %ebx,0x49000001(%rax)
   c:	8d 44 24 08          	lea    0x8(%rsp),%eax
  10:	4d 89 26             	mov    %r12,(%r14)
  13:	48 89 c2             	mov    %rax,%rdx
  16:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	74 08                	je     0x39
  31:	3c 03                	cmp    $0x3,%al
  33:	0f 8e 9f 01 00 00    	jle    0x1d8
  39:	48                   	rex.W
  3a:	b8 00 00 00 00       	mov    $0x0,%eax