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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:ca0b:0:b0:3e5:4bc5:539a with SMTP id e9e14a558f8ab-3e676661f94mr39481215ab.19.1755603270912; Tue, 19 Aug 2025 04:34:30 -0700 (PDT) Date: Tue, 19 Aug 2025 04:34:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68a46146.050a0220.e29e5.00c2.GAE@google.com> Subject: [syzbot] [ocfs2?] general protection fault in ocfs2_evict_inode (2) From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 99bade344cfa Merge tag 'rust-fixes-6.17' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10197af0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3f81850843b877ed dashboard link: https://syzkaller.appspot.com/bug?extid=47d8cb2f2cc1517e515a 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=13a3c442580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167c2ba2580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-99bade34.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/01ac0e47f59c/vmlinux-99bade34.xz kernel image: https://storage.googleapis.com/syzbot-assets/000350d2833d/bzImage-99bade34.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/eefdb34f2c0f/mount_2.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=15a3c442580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+47d8cb2f2cc1517e515a@syzkaller.appspotmail.com ocfs2: Unmounting device (7,0) on (node local) Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 5449 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-00214-g99bade344cfa #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:ocfs2_clear_inode fs/ocfs2/inode.c:1284 [inline] RIP: 0010:ocfs2_evict_inode+0x2d05/0x40e0 fs/ocfs2/inode.c:1296 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 dc db 83 fe 4d 01 f4 48 8b 1b 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 bc db 83 fe 48 8b 3b 49 81 c7 88 RSP: 0018:ffffc90002a6f340 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff8880006e2440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002a6fa70 R08: ffff8880438230b7 R09: 1ffff11008704616 R10: dffffc0000000000 R11: ffffed1008704617 R12: fffff5200054de78 R13: ffff888043823360 R14: dffffc0000000000 R15: ffff888043823338 FS: 000055556e79a500(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ac55909c0 CR3: 0000000042abb000 CR4: 0000000000352ef0 Call Trace: evict+0x501/0x9c0 fs/inode.c:810 __ocfs2_free_slot_info fs/ocfs2/slot_map.c:307 [inline] ocfs2_free_slot_info+0x79/0x260 fs/ocfs2/slot_map.c:443 ocfs2_delete_osb+0x58/0x170 fs/ocfs2/super.c:2450 ocfs2_dismount_volume+0x57a/0x8d0 fs/ocfs2/super.c:1884 generic_shutdown_super+0x132/0x2c0 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1766 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4544b8ff17 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc0cacaac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f4544c11c05 RCX: 00007f4544b8ff17 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc0cacab80 RBP: 00007ffc0cacab80 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc0cacbc10 R13: 00007f4544c11c05 R14: 0000000000013b93 R15: 00007ffc0cacbc50 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_clear_inode fs/ocfs2/inode.c:1284 [inline] RIP: 0010:ocfs2_evict_inode+0x2d05/0x40e0 fs/ocfs2/inode.c:1296 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 dc db 83 fe 4d 01 f4 48 8b 1b 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 bc db 83 fe 48 8b 3b 49 81 c7 88 RSP: 0018:ffffc90002a6f340 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff8880006e2440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002a6fa70 R08: ffff8880438230b7 R09: 1ffff11008704616 R10: dffffc0000000000 R11: ffffed1008704617 R12: fffff5200054de78 R13: ffff888043823360 R14: dffffc0000000000 R15: ffff888043823338 FS: 000055556e79a500(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ac5c9f000 CR3: 0000000042abb000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 02 00 add (%rax),%al 2: 00 48 89 add %cl,-0x77(%rax) 5: d8 48 c1 fmuls -0x3f(%rax) 8: e8 03 42 80 3c call 0x3c804210 d: 30 00 xor %al,(%rax) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 dc db 83 fe call 0xfe83dbf5 19: 4d 01 f4 add %r14,%r12 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 08 add $0x8,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 bc db 83 fe call 0xfe83dbf5 39: 48 8b 3b mov (%rbx),%rdi 3c: 49 rex.WB 3d: 81 .byte 0x81 3e: c7 (bad) 3f: 88 .byte 0x88 --- 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