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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2708:b0:430:adcb:b38d with SMTP id e9e14a558f8ab-430c528dbdbmr337793175ab.24.1761347429247; Fri, 24 Oct 2025 16:10:29 -0700 (PDT) Date: Fri, 24 Oct 2025 16:10:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68fc0765.a00a0220.9662e.000d.GAE@google.com> Subject: [syzbot] [jfs?] general protection fault in inode_set_ctime_current From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6fab32bb6508 MAINTAINERS: add Mark Brown as a linux-next m.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16bd2d2f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=df98b4d1d5944c56 dashboard link: https://syzkaller.appspot.com/bug?extid=cd7590567cc388f064f3 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155a8be2580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15078258580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-6fab32bb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b126dd4d891b/vmlinux-6fab32bb.xz kernel image: https://storage.googleapis.com/syzbot-assets/ae26100863fd/bzImage-6fab32bb.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6617e28639c8/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=125f8c92580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cd7590567cc388f064f3@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 Oops: general protection fault, probably for non-canonical address 0xe00e9c0e000c60d6: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x00750070006306b0-0x00750070006306b7] CPU: 0 UID: 0 PID: 5495 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:timestamp_truncate fs/inode.c:2732 [inline] RIP: 0010:inode_set_ctime_current+0xcf/0xb40 fs/inode.c:2774 Code: d8 48 c1 e8 03 48 89 44 24 30 42 80 3c 20 00 74 08 48 89 df e8 e2 67 e7 ff 4c 8b 3b 49 8d bf 40 06 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 d6 07 00 00 48 89 5c 24 20 41 8b 87 40 RSP: 0018:ffffc90002b4f600 EFLAGS: 00010202 RAX: 000ea00e000c60d6 RBX: ffff88801c1ab220 RCX: ffff8880002b0000 RDX: 0000000000000000 RSI: 187182c674eb3579 RDI: 00750070006306b2 RBP: ffffc90002b4f6f0 R08: ffffffff8f7cf377 R09: 1ffffffff1ef9e6e R10: dffffc0000000000 R11: fffffbfff1ef9e6f R12: dffffc0000000000 R13: ffff88801c1abe60 R14: ffffc90002b4f660 R15: 0075007000630072 FS: 000055557920a500(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31463fff CR3: 0000000011599000 CR4: 0000000000352ef0 Call Trace: jfs_create+0x7f7/0xa80 fs/jfs/namei.c:152 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x14f4/0x3830 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f1c98efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd9e448248 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f3f1cbe5fa0 RCX: 00007f3f1c98efc9 RDX: 000000000000275a RSI: 0000200000000140 RDI: ffffffffffffff9c RBP: 00007f3f1ca11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3f1cbe5fa0 R14: 00007f3f1cbe5fa0 R15: 0000000000000004 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:timestamp_truncate fs/inode.c:2732 [inline] RIP: 0010:inode_set_ctime_current+0xcf/0xb40 fs/inode.c:2774 Code: d8 48 c1 e8 03 48 89 44 24 30 42 80 3c 20 00 74 08 48 89 df e8 e2 67 e7 ff 4c 8b 3b 49 8d bf 40 06 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 d6 07 00 00 48 89 5c 24 20 41 8b 87 40 RSP: 0018:ffffc90002b4f600 EFLAGS: 00010202 RAX: 000ea00e000c60d6 RBX: ffff88801c1ab220 RCX: ffff8880002b0000 RDX: 0000000000000000 RSI: 187182c674eb3579 RDI: 00750070006306b2 RBP: ffffc90002b4f6f0 R08: ffffffff8f7cf377 R09: 1ffffffff1ef9e6e R10: dffffc0000000000 R11: fffffbfff1ef9e6f R12: dffffc0000000000 R13: ffff88801c1abe60 R14: ffffc90002b4f660 R15: 0075007000630072 FS: 000055557920a500(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffabbbdc000 CR3: 0000000011599000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: d8 48 c1 fmuls -0x3f(%rax) 3: e8 03 48 89 44 call 0x4489480b 8: 24 30 and $0x30,%al a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 e2 67 e7 ff call 0xffe767fb 19: 4c 8b 3b mov (%rbx),%r15 1c: 49 8d bf 40 06 00 00 lea 0x640(%r15),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 d6 07 00 00 jne 0x80d 37: 48 89 5c 24 20 mov %rbx,0x20(%rsp) 3c: 41 rex.B 3d: 8b .byte 0x8b 3e: 87 .byte 0x87 3f: 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 syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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