Hello, syzbot found the following issue on:
HEAD commit: 0e39a731820a Merge tag 'for-6.17-rc1-tag' of git://git.ker.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13344da2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=13f39c6a0380a209 dashboard link: https://syzkaller.appspot.com/bug?extid=d371efea57d5aeab877b compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c22c34580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a125a2580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e0297ec5b8e1/disk-0e39a731.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0396bfd57e65/vmlinux-0e39a731.xz kernel image: https://storage.googleapis.com/syzbot-assets/68482d381f43/bzImage-0e39a731.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f909676ebee0/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=15344da2580000) The issue was bisected to: commit d185351325237da688de006a2c579e82ea97bdfe Author: Hongbo Li <lihongb...@huawei.com> Date: Thu Jul 10 12:14:13 2025 +0000 f2fs: separate the options parsing and options checking bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=137ca5a2580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=10fca5a2580000 console output: https://syzkaller.appspot.com/x/log.txt?x=177ca5a2580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d371efea57d5aeab8...@syzkaller.appspotmail.com Fixes: d18535132523 ("f2fs: separate the options parsing and options checking") F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 Oops: gen[ 107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G W 6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)} Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284 Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40 RSP: 0018:ffffc90004adf8f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000021ec2c00 RSI: 0000000000000000 RDI: ffff888021ec2c80 RBP: 0000000000000066 R08: 0000000000000000 R09: 0000000000000000 R10: ffff88803d2c9768 R11: ffffed1007a592fb R12: 1ffff1100611a891 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888021ec2c80 FS: 0000555575c20480(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001000 CR3: 000000003d342000 CR4: 00000000003526f0 Call Trace: <TASK> f2fs_check_quota_consistency fs/f2fs/super.c:1188 [inline] f2fs_check_opt_consistency+0x1378/0x2c10 fs/f2fs/super.c:1436 __f2fs_remount fs/f2fs/super.c:2653 [inline] f2fs_reconfigure+0x482/0x1770 fs/f2fs/super.c:5297 reconfigure_super+0x224/0x890 fs/super.c:1077 do_remount fs/namespace.c:3314 [inline] path_mount+0xd18/0xfe0 fs/namespace.c:4112 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4321 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f13267ca259 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3d15d4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13267ca259 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000200000000140 R09: 00007fff3d15d4e0 R10: 0000000000000020 R11: 0000000000000246 R12: 00007fff3d15d4e0 R13: 00007fff3d15d768 R14: 431bde82d7b634db R15: 00007f132681303b </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strcmp+0x3c/0xc0 lib/string.c:284 Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40 RSP: 0018:ffffc90004adf8f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000021ec2c00 RSI: 0000000000000000 RDI: ffff888021ec2c80 RBP: 0000000000000066 R08: 0000000000000000 R09: 0000000000000000 R10: ffff88803d2c9768 R11: ffffed1007a592fb R12: 1ffff1100611a891 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888021ec2c80 FS: 0000555575c20480(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003d342000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 45 31 f6 xor %r14d,%r14d 3: 4a 8d 04 37 lea (%rdi,%r14,1),%rax 7: 48 89 c1 mov %rax,%rcx a: 48 c1 e9 03 shr $0x3,%rcx e: 0f b6 0c 19 movzbl (%rcx,%rbx,1),%ecx 12: 84 c9 test %cl,%cl 14: 75 2c jne 0x42 16: 42 0f b6 2c 37 movzbl (%rdi,%r14,1),%ebp 1b: 4a 8d 04 36 lea (%rsi,%r14,1),%rax 1f: 48 89 c1 mov %rax,%rcx 22: 48 c1 e9 03 shr $0x3,%rcx * 26: 0f b6 0c 19 movzbl (%rcx,%rbx,1),%ecx <-- trapping instruction 2a: 84 c9 test %cl,%cl 2c: 75 33 jne 0x61 2e: 42 0f b6 0c 36 movzbl (%rsi,%r14,1),%ecx 33: 40 38 cd cmp %cl,%bpl 36: 75 48 jne 0x80 38: 49 ff c6 inc %r14 3b: 40 rex --- 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 syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, 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 overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
