loop0: detected capacity change from 0 to 64 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5250 at fs/buffer.c:1084 mark_buffer_dirty+0x318/0x490 fs/buffer.c:1084 Modules linked in: CPU: 0 PID: 5250 Comm: syz.0.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:mark_buffer_dirty+0x318/0x490 fs/buffer.c:1084 Code: 89 f7 e8 2b 7b e6 ff 49 8b 3e be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 84 cf fc ff e8 6f 12 a2 ff eb 80 e8 68 12 a2 ff <0f> 0b e9 33 fd ff ff e8 5c 12 a2 ff 0f 0b e9 55 fd ff ff e8 50 12 RSP: 0018:ffffc90002e7f7c8 EFLAGS: 00010293 RAX: ffffffff81d5b9a8 RBX: ffff88806fcd3ae0 RCX: ffff8880284b0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88807f6c0018 R08: dffffc0000000000 R09: ffffed100d39e440 R10: 0000000000000000 R11: 0000000000000040 R12: ffff88805f136600 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100df9a75c FS: 00007ff6e2ba56c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa57eea9286 CR3: 00000000713d8000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bfs_move_block fs/bfs/file.c:43 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x814/0xa60 fs/bfs/file.c:125 __block_write_begin_int+0x54e/0x15a0 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin+0x4d/0xc0 fs/buffer.c:2122 bfs_write_begin+0x37/0xd0 fs/bfs/file.c:177 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x712/0xd00 fs/read_write.c:594 ksys_pwrite64 fs/read_write.c:701 [inline] __do_sys_pwrite64 fs/read_write.c:711 [inline] __se_sys_pwrite64 fs/read_write.c:708 [inline] __x64_sys_pwrite64+0x194/0x220 fs/read_write.c:708 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7ff6e3536749 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:00007ff6e2ba5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007ff6e378cfa0 RCX: 00007ff6e3536749 RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000006 RBP: 00007ff6e35baf91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e7c R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff6e378d038 R14: 00007ff6e378cfa0 R15: 00007ffcd4f60988