[syzbot] [tomoyo?] general protection fault in tomoyo_check_acl (4)
syzbot
syzbot+2232f2316fe61cb50344 at syzkaller.appspotmail.com
Mon Dec 16 09:55:21 UTC 2024
Hello,
syzbot found the following issue on:
HEAD commit: 2d8308bf5b67 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10507cdf980000
kernel config: https://syzkaller.appspot.com/x/.config?x=99a5586995ec03b2
dashboard link: https://syzkaller.appspot.com/bug?extid=2232f2316fe61cb50344
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/66039e873a32/disk-2d8308bf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/60744ba3f743/vmlinux-2d8308bf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/25731ba013ad/bzImage-2d8308bf.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2232f2316fe61cb50344 at syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 UID: 0 PID: 15160 Comm: scsi_id Not tainted 6.13.0-rc2-syzkaller-00362-g2d8308bf5b67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:tomoyo_check_acl+0xb0/0x410 security/tomoyo/domain.c:173
Code: 00 0f 85 57 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fc 01 00 00 e8 c1 0d 48 fd 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 cc 02 00 00 44 0f b6 7b 18 31
RSP: 0018:ffffc9000c087718 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8451302f RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000c087808
R13: ffff888028c55690 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24ab591ba8 CR3: 000000003bf9a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tomoyo_path_permission security/tomoyo/file.c:586 [inline]
tomoyo_path_permission+0x1ff/0x3b0 security/tomoyo/file.c:573
tomoyo_check_open_permission+0x37d/0x3c0 security/tomoyo/file.c:777
tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
security_file_open+0x84/0x1e0 security/security.c:3105
do_dentry_open+0x57e/0x1ea0 fs/open.c:928
vfs_open+0x82/0x3f0 fs/open.c:1075
do_open fs/namei.c:3828 [inline]
path_openat+0x1e6a/0x2d60 fs/namei.c:3987
do_filp_open+0x20c/0x470 fs/namei.c:4014
do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f24ab607a46
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 0a 48 01 00 48 83 c8 ff c3 31
RSP: 002b:00007ffc0a43e228 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffc0a43e488 RCX: 00007f24ab607a46
RDX: 0000000000080000 RSI: 00007ffc0a43e2a0 RDI: 00000000ffffff9c
RBP: 00007ffc0a43e290 R08: 0000000000080000 R09: 00007ffc0a43e2a0
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc0a43e2a0
R13: 0000000000000009 R14: 00007ffc0a43e46f R15: 00000000ffffffff
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tomoyo_check_acl+0xb0/0x410 security/tomoyo/domain.c:173
Code: 00 0f 85 57 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fc 01 00 00 e8 c1 0d 48 fd 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 cc 02 00 00 44 0f b6 7b 18 31
RSP: 0018:ffffc9000c087718 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8451302f RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000c087808
R13: ffff888028c55690 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32016ff8 CR3: 000000003bf9a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 0f add %cl,(%rdi)
2: 85 57 03 test %edx,0x3(%rdi)
5: 00 00 add %al,(%rax)
7: 49 8b 5d 00 mov 0x0(%r13),%rbx
b: 49 39 dd cmp %rbx,%r13
e: 0f 84 fc 01 00 00 je 0x210
14: e8 c1 0d 48 fd call 0xfd480dda
19: 48 8d 7b 18 lea 0x18(%rbx),%rdi
1d: 48 89 f8 mov %rdi,%rax
20: 48 89 fa mov %rdi,%rdx
23: 48 c1 e8 03 shr $0x3,%rax
27: 83 e2 07 and $0x7,%edx
* 2a: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax <-- trapping instruction
2e: 38 d0 cmp %dl,%al
30: 7f 08 jg 0x3a
32: 84 c0 test %al,%al
34: 0f 85 cc 02 00 00 jne 0x306
3a: 44 0f b6 7b 18 movzbl 0x18(%rbx),%r15d
3f: 31 .byte 0x31
---
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