------------[ cut here ]------------ WARNING: CPU: 0 PID: 4896 at fs/buffer.c:1081 mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081 Modules linked in: CPU: 0 PID: 4896 Comm: syz.2.102 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081 Code: 13 d1 e2 ff 49 8b 3f be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bc bc fc ff e8 a7 9f 92 ff e9 43 ff ff ff e8 9d 9f 92 ff <0f> 0b e9 ba fc ff ff e8 91 9f 92 ff 0f 0b e9 00 fd ff ff e8 85 9f RSP: 0018:ffffc900061aec68 EFLAGS: 00010293 RAX: ffffffff81ee4033 RBX: ffff88804941b000 RCX: ffff888028bf5940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffff888055258001 R08: dffffc0000000000 R09: ffffed1009283601 R10: ffffed1009283601 R11: 1ffff11009283600 R12: ffff888055738160 R13: 0000000000000200 R14: ffff88804d250200 R15: 000000000000000a FS: 00007fc86f2816c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000023000 CR3: 000000007d114000 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+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+0x2f7/0x5a0 mm/filemap.c:3862 __generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989 __kernel_write_iter+0x26d/0x630 fs/read_write.c:517 __kernel_write+0xec/0x140 fs/read_write.c:537 __dump_emit+0x202/0x310 fs/coredump.c:873 writenote+0x1bb/0x2e0 fs/binfmt_elf.c:1530 write_note_info fs/binfmt_elf.c:1993 [inline] elf_core_dump+0x2b18/0x3490 fs/binfmt_elf.c:2341 do_coredump+0x15ff/0x22b0 fs/coredump.c:824 get_signal+0x10aa/0x1350 kernel/signal.c:2857 arch_do_signal_or_restart+0xb7/0x1240 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:316 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1490 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608 RIP: 0033:0x7fc86e38f751 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: 00007fc86e5e5fa0 RCX: 00007fc86e38f749 RDX: 0000000000000000 RSI: 00000000fffffeb0 RDI: 0000000002000400 RBP: 00007fc86e413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fc86e5e6038 R14: 00007fc86e5e5fa0 R15: 00007ffe135f2e68