loop0: detected capacity change from 0 to 64 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4928 at fs/buffer.c:1084 mark_buffer_dirty+0x2e8/0x518 fs/buffer.c:1084 Modules linked in: CPU: 0 PID: 4928 Comm: syz.0.18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : mark_buffer_dirty+0x2e8/0x518 fs/buffer.c:1084 lr : mark_buffer_dirty+0x2e8/0x518 fs/buffer.c:1084 sp : ffff80001fc17560 x29: ffff80001fc17560 x28: ffff0000d7a7c018 x27: dfff800000000000 x26: ffff0000e35dfc00 x25: ffff0000ecce8530 x24: ffff0000de7e10e8 x23: 0000000000000013 x22: ffff0000de7ece80 x21: 0000000000000013 x20: 0000000000000010 x19: ffff0000de7e10e8 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082c2be8 x15: 0000000000000000 x14: 0000000000000001 x13: 1fffe0001bcfc21d x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff8000089cd140 x8 : ffff0000c8221b40 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff0000e35dfe00 x4 : ffff0000eaeef600 x3 : ffff8000089cce84 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: mark_buffer_dirty+0x2e8/0x518 fs/buffer.c:1084 bfs_move_block fs/bfs/file.c:43 [inline] bfs_move_blocks fs/bfs/file.c:56 [inline] bfs_get_block+0x6d8/0x9e8 fs/bfs/file.c:125 __block_write_begin_int+0x3d8/0x1530 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin+0x60/0xdc fs/buffer.c:2122 bfs_write_begin+0x50/0xf4 fs/bfs/file.c:177 generic_perform_write+0x208/0x488 mm/filemap.c:3785 __generic_file_write_iter+0x23c/0x454 mm/filemap.c:3912 generic_file_write_iter+0xb0/0x1b4 mm/filemap.c:3944 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x590/0xa60 fs/read_write.c:594 ksys_write+0x12c/0x224 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 1942 hardirqs last enabled at (1941): [] bh_lru_install fs/buffer.c:1261 [inline] hardirqs last enabled at (1941): [] __find_get_block+0xa78/0xcb0 fs/buffer.c:1312 hardirqs last disabled at (1942): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (1900): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (1898): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace 596a0145d534e0e6 ]---