EXT4-fs error (device loop4) in ext4_reserve_inode_write:5881: Corrupt filesystem EXT4-fs (loop4): Remounting filesystem read-only EXT4-fs error (device loop4): ext4_dirty_inode:6085: inode #15: comm syz.4.1897: mark_inode_dirty error EXT4-fs (loop4): Remounting filesystem read-only ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x13a3/0x37d0 fs/ext4/xattr.c:1748 Read of size 18446744073709551600 at addr ffff88810ee01eb8 by task syz.4.1897/8222 CPU: 1 PID: 8222 Comm: syz.4.1897 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x13a3/0x37d0 fs/ext4/xattr.c:1748 ext4_xattr_ibody_set+0x122/0x360 fs/ext4/xattr.c:2253 ext4_destroy_inline_data_nolock+0x211/0x5b0 fs/ext4/inline.c:459 ext4_convert_inline_data_to_extent fs/ext4/inline.c:623 [inline] ext4_try_to_write_inline_data+0x64e/0x1110 fs/ext4/inline.c:764 ext4_write_begin+0x221/0x1220 fs/ext4/inode.c:1192 generic_perform_write+0x2ad/0x670 mm/filemap.c:3870 ext4_buffered_write_iter+0x4ed/0x670 fs/ext4/file.c:270 ext4_file_write_iter+0x18c/0x1550 fs/ext4/file.c:664 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x802/0xf70 fs/read_write.c:594 ksys_pwrite64 fs/read_write.c:701 [inline] __do_sys_pwrite64 fs/read_write.c:711 [inline] __se_sys_pwrite64 fs/read_write.c:708 [inline] __x64_sys_pwrite64+0x191/0x220 fs/read_write.c:708 x64_sys_call+0xa6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1ab47f2749 Code: ff ff c3 66 2e 0f 1f 84 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 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1ab3239038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f1ab4a49090 RCX: 00007f1ab47f2749 RDX: 0000000000000001 RSI: 0000200000000080 RDI: 0000000000000008 RBP: 00007f1ab4876f91 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000709c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1ab4a49128 R14: 00007f1ab4a49090 R15: 00007ffc3007ee88 The buggy address belongs to the page: page:ffffea00043b8040 refcount:3 mapcount:1 mapping:ffff88810928a4d8 index:0x1 pfn:0x10ee01 memcg:ffff888100250000 aops:def_blk_aops ino:700004 flags: 0x400000000002203e(referenced|uptodate|dirty|lru|active|private|mappedtodisk|zone=1) raw: 400000000002203e ffffea0004a7b188 ffffea000736ab08 ffff88810928a4d8 raw: 0000000000000001 ffff88812acd3dc8 0000000300000000 ffff888100250000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 8200, ts 385564332377, free_ts 384240469900 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] __page_cache_alloc include/linux/pagemap.h:305 [inline] page_cache_ra_unbounded+0x2b2/0x980 mm/readahead.c:227 do_page_cache_ra mm/readahead.c:280 [inline] force_page_cache_ra+0x3fd/0x460 mm/readahead.c:312 page_cache_sync_ra+0x2ae/0x420 mm/readahead.c:590 page_cache_sync_readahead include/linux/pagemap.h:831 [inline] filemap_get_pages mm/filemap.c:2569 [inline] filemap_read+0x63a/0x1f70 mm/filemap.c:2654 generic_file_read_iter+0xac/0x400 mm/filemap.c:2814 blkdev_read_iter+0x12f/0x160 block/fops.c:563 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x68b/0xbe0 fs/read_write.c:485 ksys_read+0x140/0x240 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:631 x64_sys_call+0x96d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5884 free_pages+0x82/0x90 mm/page_alloc.c:5895 kasan_depopulate_vmalloc_pte+0x6b/0x90 mm/kasan/shadow.c:354 apply_to_pte_range mm/memory.c:2643 [inline] apply_to_pmd_range mm/memory.c:2687 [inline] apply_to_pud_range mm/memory.c:2723 [inline] apply_to_p4d_range mm/memory.c:2759 [inline] __apply_to_page_range+0x8cd/0xc70 mm/memory.c:2795 apply_to_existing_page_range+0x38/0x50 mm/memory.c:2828 kasan_release_vmalloc+0x97/0xb0 mm/kasan/shadow.c:464 __purge_vmap_area_lazy+0xc05/0x1840 mm/vmalloc.c:1723 _vm_unmap_aliases+0x2fd/0x380 mm/vmalloc.c:2126 vm_remove_mappings mm/vmalloc.c:2619 [inline] __vunmap+0x66e/0x9e0 mm/vmalloc.c:2650 __vfree mm/vmalloc.c:2709 [inline] vfree+0x8b/0xc0 mm/vmalloc.c:2740 module_memfree+0x17/0x30 kernel/module.c:2150 bpf_jit_free_exec+0x15/0x20 kernel/bpf/core.c:871 bpf_jit_binary_free kernel/bpf/core.c:918 [inline] bpf_jit_free+0x98/0x240 kernel/bpf/core.c:931 bpf_prog_free_deferred+0x5c7/0x6d0 kernel/bpf/core.c:2302 Memory state around the buggy address: ffff88810ee01d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810ee01e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810ee01e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88810ee01f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810ee01f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop4): ext4_xattr_ibody_find:2229: inode #15: comm syz.4.1897: corrupted in-inode xattr EXT4-fs (loop4): Remounting filesystem read-only EXT4-fs warning (device loop4): ext4_xattr_set_entry:1761: inode #15: comm syz.4.1897: unable to update i_inline_off