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@xxxxxxxxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxxx. 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
