------------[ cut here ]------------ WARNING: CPU: 1 PID: 6403 at fs/buffer.c:1084 mark_buffer_dirty+0x318/0x490 fs/buffer.c:1084 Modules linked in: CPU: 1 PID: 6403 Comm: syz.6.328 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:mark_buffer_dirty+0x318/0x490 fs/buffer.c:1084 Code: 89 f7 e8 8b 7f e6 ff 49 8b 3e be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c4 d0 fc ff e8 5f 17 a2 ff eb 80 e8 58 17 a2 ff <0f> 0b e9 33 fd ff ff e8 4c 17 a2 ff 0f 0b e9 55 fd ff ff e8 40 17 RSP: 0018:ffffc90003cceda8 EFLAGS: 00010293 RAX: ffffffff81d5b3c8 RBX: ffff88805e280740 RCX: ffff88801df38000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888077504018 R08: dffffc0000000000 R09: ffffed100b516880 R10: 0000000000000000 R11: 0000000000000040 R12: ffff88804e4af000 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100bc500e8 FS: 00007fe70aef96c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f2f5aad58 CR3: 000000006287b000 CR4: 00000000003506f0 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 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 elf_core_dump+0x29e8/0x3530 fs/binfmt_elf.c:2264 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x7fe70cc91bb1 Code: 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 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000fffffeb0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fe70ced8fa0 RCX: 00007fe70cc91ba9 RDX: 0000000000000000 RSI: 00000000fffffeb0 RDI: 0000000002000400 RBP: 00007fe70cd14e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fe70ced9038 R14: 00007fe70ced8fa0 R15: 00007ffff8e4fca8