loop0: detected capacity change from 0 to 64 loop0: detected capacity change from 64 to 0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5335 at fs/buffer.c:1081 mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081 Modules linked in: CPU: 1 PID: 5335 Comm: syz.0.254 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081 Code: 13 d8 e2 ff 49 8b 3f be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1c bc fc ff e8 97 bb 92 ff e9 43 ff ff ff e8 8d bb 92 ff <0f> 0b e9 ba fc ff ff e8 81 bb 92 ff 0f 0b e9 00 fd ff ff e8 75 bb RSP: 0018:ffffc900033077e8 EFLAGS: 00010287 RAX: ffffffff81ee1493 RBX: ffff888054cc79f8 RCX: 0000000000080000 RDX: ffffc900058ba000 RSI: 0000000000007ff2 RDI: 0000000000007ff3 RBP: ffff888071fb6001 R08: dffffc0000000000 R09: ffffed100a998f40 R10: ffffed100a998f40 R11: 1ffff1100a998f3f R12: ffff88807d092160 R13: 0000000000000200 R14: ffff88804c38f800 R15: 000000000000000a FS: 00007f33508506c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000903000 CR3: 00000000182f4000 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+0x58f/0xa50 fs/bfs/file.c:125 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x96/0x1e0 fs/buffer.c:2102 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177 generic_perform_write+0x2db/0x560 mm/filemap.c:3846 __generic_file_write_iter+0x172/0x430 mm/filemap.c:3974 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:4006 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x44c/0x960 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __x64_sys_pwrite64+0x191/0x220 fs/read_write.c:706 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f334f98ebe9 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:00007f3350850038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f334fbc5fa0 RCX: 00007f334f98ebe9 RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000008 RBP: 00007f334fa11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e7c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f334fbc6038 R14: 00007f334fbc5fa0 R15: 00007ffc51b74848