[syzbot] [tomoyo?] [hfs?] general protection fault in tomoyo_check_acl (3)
syzbot
syzbot+28aaddd5a3221d7fd709 at syzkaller.appspotmail.com
Fri Jul 7 12:09:58 UTC 2023
Hello,
syzbot found the following issue on:
HEAD commit: a901a3568fd2 Merge tag 'iomap-6.5-merge-1' of git://git.ke..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15e4c8a4a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=7406f415f386e786
dashboard link: https://syzkaller.appspot.com/bug?extid=28aaddd5a3221d7fd709
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b5bb80a80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10193ee7280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/119fd918f733/disk-a901a356.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/79f9ac119639/vmlinux-a901a356.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8bd8662e2869/bzImage-a901a356.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/8e36b52190bc/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+28aaddd5a3221d7fd709 at syzkaller.appspotmail.com
loop0: detected capacity change from 0 to 64
hfs: unable to locate alternate MDB
hfs: continuing without an alternate MDB
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 5189 Comm: syz-executor307 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:tomoyo_check_acl+0xb0/0x440 security/tomoyo/domain.c:173
Code: 00 0f 85 64 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fa 01 00 00 e8 71 fc b1 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 f2 02 00 00 44 0f b6 73 18 31
RSP: 0018:ffffc90003caf790 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83d2d25f RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90003caf880
R13: ffff888016f31410 R14: 0000000000000000 R15: 0000000000000000
FS: 0000555556ffa300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc16e620c80 CR3: 0000000075643000 CR4: 0000000000350ef0
Call Trace:
<TASK>
tomoyo_path_permission security/tomoyo/file.c:586 [inline]
tomoyo_path_permission+0x1ff/0x3a0 security/tomoyo/file.c:573
tomoyo_check_open_permission+0x366/0x3a0 security/tomoyo/file.c:777
tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline]
tomoyo_file_open+0xaa/0xd0 security/tomoyo/tomoyo.c:327
security_file_open+0x49/0xb0 security/security.c:2797
do_dentry_open+0x57a/0x17b0 fs/open.c:901
do_open fs/namei.c:3636 [inline]
path_openat+0x1b65/0x2710 fs/namei.c:3793
do_filp_open+0x1ba/0x410 fs/namei.c:3820
do_sys_openat2+0x160/0x1c0 fs/open.c:1407
do_sys_open fs/open.c:1422 [inline]
__do_sys_openat fs/open.c:1438 [inline]
__se_sys_openat fs/open.c:1433 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1433
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc16e647a19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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:00007ffcc752e608 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000e483 RCX: 00007fc16e647a19
RDX: 0000000000141842 RSI: 0000000020000380 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000260 R09: 00007ffcc752e630
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc752e62c
R13: 00007ffcc752e660 R14: 00007ffcc752e640 R15: 00000000000000be
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tomoyo_check_acl+0xb0/0x440 security/tomoyo/domain.c:173
Code: 00 0f 85 64 03 00 00 49 8b 5d 00 49 39 dd 0f 84 fa 01 00 00 e8 71 fc b1 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 f2 02 00 00 44 0f b6 73 18 31
RSP: 0018:ffffc90003caf790 EFLAGS: 00010246
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff83d2d25f RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90003caf880
R13: ffff888016f31410 R14: 0000000000000000 R15: 0000000000000000
FS: 0000555556ffa300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d594f5c028 CR3: 0000000075643000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 00 0f add %cl,(%rdi)
2: 85 64 03 00 test %esp,0x0(%rbx,%rax,1)
6: 00 49 8b add %cl,-0x75(%rcx)
9: 5d pop %rbp
a: 00 49 39 add %cl,0x39(%rcx)
d: dd 0f fisttpll (%rdi)
f: 84 fa test %bh,%dl
11: 01 00 add %eax,(%rax)
13: 00 e8 add %ch,%al
15: 71 fc jno 0x13
17: b1 fd mov $0xfd,%cl
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 f2 02 00 00 jne 0x32c
3a: 44 0f b6 73 18 movzbl 0x18(%rbx),%r14d
3f: 31 .byte 0x31
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller at googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
More information about the Linux-security-module-archive
mailing list