loop0: detected capacity change from 0 to 264192
erofs: (device loop0): mounted with root inode @ nid 36.
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 3601 Comm: syz-executor665 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:erofs_bread+0x34/0x6f0 fs/erofs/data.c:35
Code: 54 49 89 f4 55 89 d5 53 48 89 fb 48 83 ec 08 e8 02 2f c4 fd 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 36 06 00 00 48 89 da 4d 8b 64 24 30 48 b8 00 00
RSP: 0018:ffffc90003e8f608 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffffc90003e8f750 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff83b86d7e RDI: 0000000000000030
RBP: 000000007ec94954 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000a62 R11: 0000000000000000 R12: 0000000000000000
R13: 032487ec94954840 R14: 0000000000000001 R15: dffffc0000000000
FS: 00005555574a5300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2ea2b7b260 CR3: 00000000203d8000 CR4: 0000000000350ee0
Call Trace:
<TASK>
z_erofs_read_fragment fs/erofs/zdata.c:667 [inline]
z_erofs_do_read_page+0x593/0x3bb0 fs/erofs/zdata.c:780
z_erofs_pcluster_readmore+0x378/0x830 fs/erofs/zdata.c:1589
z_erofs_read_folio+0x248/0x6e0 fs/erofs/zdata.c:1616
filemap_read_folio+0xdb/0x2c0 mm/filemap.c:2407
do_read_cache_folio+0x1df/0x510 mm/filemap.c:3534
erofs_bread+0x150/0x6f0 fs/erofs/data.c:46
find_target_block_classic fs/erofs/namei.c:108 [inline]
erofs_namei+0x1f9/0xc40 fs/erofs/namei.c:184
erofs_lookup fs/erofs/namei.c:212 [inline]
erofs_lookup+0x312/0x4f0 fs/erofs/namei.c:199
__lookup_hash+0x117/0x180 fs/namei.c:1601
filename_create+0x1d6/0x4a0 fs/namei.c:3807
do_mkdirat+0x99/0x310 fs/namei.c:4050
__do_sys_mkdirat fs/namei.c:4075 [inline]
__se_sys_mkdirat fs/namei.c:4073 [inline]
__x64_sys_mkdirat+0x115/0x170 fs/namei.c:4073
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f15a0dc6039
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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc02ea30e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f15a0dc6039
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007f15a0d85830 R08: 00005555574a52c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15a0d858c0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:erofs_bread+0x34/0x6f0 fs/erofs/data.c:35
Code: 54 49 89 f4 55 89 d5 53 48 89 fb 48 83 ec 08 e8 02 2f c4 fd 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 36 06 00 00 48 89 da 4d 8b 64 24 30 48 b8 00 00
RSP: 0018:ffffc90003e8f608 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffffc90003e8f750 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff83b86d7e RDI: 0000000000000030
RBP: 000000007ec94954 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000a62 R11: 0000000000000000 R12: 0000000000000000
R13: 032487ec94954840 R14: 0000000000000001 R15: dffffc0000000000
FS: 00005555574a5300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2ea2b7b260 CR3: 00000000203d8000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
0: 54 push %rsp
1: 49 89 f4 mov %rsi,%r12
4: 55 push %rbp
5: 89 d5 mov %edx,%ebp
7: 53 push %rbx
8: 48 89 fb mov %rdi,%rbx
b: 48 83 ec 08 sub $0x8,%rsp
f: e8 02 2f c4 fd callq 0xfdc42f16
14: 49 8d 7c 24 30 lea 0x30(%r12),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 36 06 00 00 jne 0x66a
34: 48 89 da mov %rbx,%rdx
37: 4d 8b 64 24 30 mov 0x30(%r12),%r12
3c: 48 rex.W
3d: b8 .byte 0xb8