EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
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kernel BUG at fs/ext4/inode.c:2827!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 7318 Comm: syz.2.589 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : ext4_do_writepages+0x3bbc/0x3bc0 fs/ext4/inode.c:2826
lr : ext4_do_writepages+0x3bbc/0x3bc0 fs/ext4/inode.c:2826
sp : ffff800095766960
x29: ffff800095766d20 x28: 0000000000000001 x27: dfff800000000000
x26: ffff700012aecd64 x25: 1ffff00012aecdfc x24: 1fffe0001e901262
x23: ffff700012aecdb0 x22: ffff0000f4809310 x21: ffff0000dac98000
x20: 0000006210000000 x19: ffff0000dac9a000 x18: 00000000ffffffff
x17: ffff80008a74f000 x16: 0000000000000004 x15: ffff80008a2d8da0
x14: ffff80008a54ee28 x13: 0000000000000008 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000003 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000080
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800081017928
x2 : 0000004000000000 x1 : ffff0000cbef0000 x0 : 0000000000000000
Call trace:
 ext4_do_writepages+0x3bbc/0x3bc0 fs/ext4/inode.c:2826 (P)
 ext4_writepages+0x198/0x2dc fs/ext4/inode.c:3043
 do_writepages+0x284/0x47c mm/page-writeback.c:2571
 filemap_writeback+0x230/0x2bc mm/filemap.c:387
 filemap_flush_range mm/filemap.c:436 [inline]
 filemap_flush+0x30/0x40 mm/filemap.c:451
 ext4_convert_inline_data+0x138/0x4e8 fs/ext4/inline.c:1972
 ext4_page_mkwrite+0x1d0/0xd1c fs/ext4/inode.c:6809
 do_page_mkwrite+0x138/0x2b8 mm/memory.c:3684
 wp_page_shared mm/memory.c:4085 [inline]
 do_wp_page+0x1270/0x4074 mm/memory.c:4304
 handle_pte_fault mm/memory.c:6395 [inline]
 __handle_mm_fault mm/memory.c:6517 [inline]
 handle_mm_fault+0x123c/0x253c mm/memory.c:6686
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x8ec/0x2134 mm/gup.c:1428
 __get_user_pages_locked mm/gup.c:1692 [inline]
 faultin_page_range+0x1f0/0x6d8 mm/gup.c:1912
 madvise_populate mm/madvise.c:969 [inline]
 madvise_do_behavior+0x558/0x7c0 mm/madvise.c:1906
 do_madvise+0x28c/0x2f0 mm/madvise.c:2006
 __do_sys_madvise mm/madvise.c:2015 [inline]
 __se_sys_madvise mm/madvise.c:2013 [inline]
 __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:2013
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Code: aa1303e0 97c24004 d4210000 97d8ea5c (d4210000) 
---[ end trace 0000000000000000 ]---