Hello, syzbot found the following issue on: HEAD commit: 727fb8376504 Merge tag 'input-for-v6.6-rc5' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=165b5361680000 kernel config: https://syzkaller.appspot.com/x/.config?x=32d0b9b42ceb8b10 dashboard link: https://syzkaller.appspot.com/bug?extid=d98fd19acd08b36ff422 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ab3d03680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1651329d680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/756c4ab74278/disk-727fb837.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f8c21021e277/vmlinux-727fb837.xz kernel image: https://storage.googleapis.com/syzbot-assets/46bc1f7ddaac/bzImage-727fb837.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/05fb682fb025/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d98fd19acd08b36ff422@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 64 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5092 at fs/buffer.c:1188 mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1188 Modules linked in: CPU: 0 PID: 5092 Comm: syz-executor341 Not tainted 6.6.0-rc5-syzkaller-00243-g727fb8376504 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1188 Code: e9 ff e6 89 ff e8 fa e6 89 ff 48 89 ef e8 42 87 e7 ff 5b 5d e9 eb e6 89 ff e8 e6 e6 89 ff 0f 0b e9 10 fe ff ff e8 da e6 89 ff <0f> 0b e9 b7 fc ff ff e8 ce e6 89 ff 0f 0b e9 d6 fc ff ff 48 89 df RSP: 0018:ffffc90003bcf968 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888076754488 RCX: 0000000000000000 RDX: ffff8880268f1dc0 RSI: ffffffff81fde006 RDI: 0000000000000001 RBP: ffff888076753e00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000009 R13: ffff8880275ca000 R14: dffffc0000000000 R15: ffffed1004eb942c FS: 00007ff0e3a7f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004000 CR3: 00000000177ca000 CR4: 0000000000350ef0 Call Trace: <TASK> bfs_move_block fs/bfs/file.c:43 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x37f/0xdd0 fs/bfs/file.c:125 __block_write_begin_int+0x3c0/0x1560 fs/buffer.c:2120 __block_write_begin fs/buffer.c:2169 [inline] block_write_begin+0xb1/0x490 fs/buffer.c:2228 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177 generic_perform_write+0x278/0x600 mm/filemap.c:3969 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4064 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4090 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x650/0xe40 fs/read_write.c:584 ksys_write+0x12f/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff0e3ac2b99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff0e3a7f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff0e3b4a6c8 RCX: 00007ff0e3ac2b99 RDX: 000000000208e24b RSI: 0000000020000440 RDI: 0000000000000004 RBP: 00007ff0e3b4a6c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff0e3b170c0 R13: 00007ff0e3b1706b R14: 0030656c69662f2e R15: 0031656c69662f2e </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 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 overwrite 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
