Hello, syzbot found the following issue on: HEAD commit: b947cc5bf6d7 Merge tag 'erofs-for-6.9-rc7-fixes' of git://.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=11175d5f180000 kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175 dashboard link: https://syzkaller.appspot.com/bug?extid=dd43bd0f7474512edc47 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d2957f180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1620ca40980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7318118d629d/disk-b947cc5b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/88b2ce2fc8ea/vmlinux-b947cc5b.xz kernel image: https://storage.googleapis.com/syzbot-assets/3f3ffc239871/bzImage-b947cc5b.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/224b657d209f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dd43bd0f7474512edc47@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 512 to 64 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290 fs/mbcache.c:419 Modules linked in: CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419 Code: 24 08 4c 89 f6 e8 9c e6 ff ff eb 05 e8 45 3b 6e ff 4c 8b 34 24 49 39 ee 74 33 e8 37 3b 6e ff e9 6a fe ff ff e8 2d 3b 6e ff 90 <0f> 0b 90 eb 83 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 58 ff ff ff RSP: 0018:ffffc90003677a88 EFLAGS: 00010293 RAX: ffffffff8227d393 RBX: 0000000000000002 RCX: ffff88807c9ebc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: ffff88801aeb3858 R08: ffffffff8227d312 R09: 1ffff1100dd2e204 R10: dffffc0000000000 R11: ffffed100dd2e205 R12: 1ffff1100dd2e200 R13: ffff88806e971020 R14: ffff88806e971000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ec96f85460 CR3: 000000000e134000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327 deactivate_locked_super+0xc4/0x130 fs/super.c:472 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa1b/0x27e0 kernel/exit.c:878 do_group_exit+0x207/0x2c0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4207bbec89 Code: Unable to access opcode bytes at 0x7f4207bbec5f. RSP: 002b:00007ffd518b18c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f4207bbec89 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007f4207c3b390 R08: ffffffffffffffb8 R09: 00007ffd518b19a0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4207c3b390 R13: 0000000000000000 R14: 00007f4207c3c100 R15: 00007f4207b8cf60 </TASK> --- 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 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
