------------[ cut here ]------------ WARNING: fs/buffer.c:1183 at mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183, CPU#0: syz.4.391/8586 Modules linked in: CPU: 0 UID: 0 PID: 8586 Comm: syz.4.391 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183 lr : mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183 sp : ffff80009d966070 x29: ffff80009d966070 x28: ffff0000e53b8158 x27: dfff800000000000 x26: ffff0000fb624600 x25: ffff0000f99b4518 x24: ffff0000f9a4a570 x23: ffff0000e53b8018 x22: ffff0000e0e35488 x21: 1fffe0001ca7702b x20: 0000000000000010 x19: ffff0000f9a4a570 x18: 00000000ffffffff x17: ffff800093599000 x16: ffff8000805387e4 x15: 0000000000000001 x14: 1fffe0001f3494ae x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001f3494af x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000ca5e3900 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff0000fb624800 x4 : ffff0000fef0c400 x3 : ffff800080eb0438 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: mark_buffer_dirty+0x26c/0x490 fs/buffer.c:1183 (P) bfs_move_block fs/bfs/file.c:44 [inline] bfs_move_blocks fs/bfs/file.c:57 [inline] bfs_get_block+0x4d8/0x9d4 fs/bfs/file.c:126 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2145 block_write_begin+0xa4/0x12c fs/buffer.c:2256 bfs_write_begin+0x48/0xec fs/bfs/file.c:180 generic_perform_write+0x244/0x7bc mm/filemap.c:4314 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4431 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4457 __kernel_write_iter+0x310/0x738 fs/read_write.c:619 __kernel_write+0xe0/0x130 fs/read_write.c:639 __dump_emit fs/coredump.c:1220 [inline] dump_emit+0x220/0x31c fs/coredump.c:1258 writenote+0xe0/0x28c fs/binfmt_elf.c:1432 write_note_info fs/binfmt_elf.c:1946 [inline] elf_core_dump+0x26e0/0x2fbc fs/binfmt_elf.c:2098 coredump_write+0x1084/0x1900 fs/coredump.c:1049 do_coredump fs/coredump.c:1126 [inline] vfs_coredump+0x2674/0x30ac fs/coredump.c:1200 get_signal+0xe38/0x12f8 kernel/signal.c:3019 arch_do_signal_or_restart+0x1b8/0x46d4 arch/arm64/kernel/signal.c:1619 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x88/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_da+0x180/0x248 arch/arm64/kernel/entry-common.c:541 el0t_64_sync_handler+0x90/0x12c arch/arm64/kernel/entry-common.c:746 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 598 hardirqs last enabled at (597): [] bh_lru_install fs/buffer.c:1353 [inline] hardirqs last enabled at (597): [] find_get_block_common+0x974/0xdec fs/buffer.c:1410 hardirqs last disabled at (598): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (152): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (150): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---