EXT4-fs error (device loop9): xattr_find_entry:297: inode #12: comm syz.9.2331: corrupted xattr entries EXT4-fs (loop9): Remounting filesystem read-only ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x11db/0x3a80 fs/ext4/xattr.c:1738 Read of size 18446744073709551600 at addr ffff88812cd94302 by task syz.9.2331/7959 CPU: 0 PID: 7959 Comm: syz.9.2331 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 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+0x10f/0x150 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x11db/0x3a80 fs/ext4/xattr.c:1738 ext4_xattr_ibody_set+0x114/0x330 fs/ext4/xattr.c:2240 ext4_destroy_inline_data_nolock+0x234/0x5e0 fs/ext4/inline.c:468 ext4_convert_inline_data_to_extent fs/ext4/inline.c:641 [inline] ext4_try_to_write_inline_data+0x6f4/0x11a0 fs/ext4/inline.c:782 ext4_write_begin+0x26a/0x1360 fs/ext4/inode.c:1194 generic_perform_write+0x2b7/0x690 mm/filemap.c:3887 ext4_buffered_write_iter+0x4ab/0x630 fs/ext4/file.c:270 ext4_file_write_iter+0x427/0x1530 fs/ext4/file.c:-1 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x831/0xfd0 fs/read_write.c:594 ksys_write+0x14a/0x260 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 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: 0033:0x7fe949cbfe99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe948719028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe949f47fa0 RCX: 00007fe949cbfe99 RDX: 0000000000000058 RSI: 0000200000000000 RDI: 0000000000000004 RBP: 00007fe949d55eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe949f48038 R14: 00007fe949f47fa0 R15: 00007ffed33f26b8 The buggy address belongs to the page: page:ffffea0004b36500 refcount:3 mapcount:1 mapping:ffff8881092c7258 index:0x2 pfn:0x12cd94 memcg:ffff888100252280 aops:def_blk_aops ino:700009 flags: 0x400000000002203e(referenced|uptodate|dirty|lru|active|private|mappedtodisk|zone=1) raw: 400000000002203e ffffea000462e188 ffffea0004388f48 ffff8881092c7258 raw: 0000000000000002 ffff888129a412a0 0000000300000000 ffff888100252280 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 7959, ts 471573778549, free_ts 471557568050 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824 __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] pagecache_get_page+0xacc/0xdd0 mm/filemap.c:1955 find_or_create_page include/linux/pagemap.h:418 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x231/0x7d0 fs/buffer.c:1336 sb_getblk include/linux/buffer_head.h:361 [inline] __ext4_get_inode_loc+0x45b/0xcb0 fs/ext4/inode.c:4370 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4478 [inline] __ext4_iget+0x448/0x3e80 fs/ext4/inode.c:4733 ext4_orphan_get+0x1e0/0x630 fs/ext4/ialloc.c:1406 ext4_orphan_cleanup+0x8c7/0x1120 fs/ext4/orphan.c:465 ext4_fill_super+0x84ce/0x8bf0 fs/ext4/super.c:4997 mount_bdev+0x28d/0x3c0 fs/super.c:1400 ext4_mount+0x34/0x40 fs/ext4/super.c:6650 legacy_get_tree+0xed/0x190 fs/fs_context.c:611 vfs_get_tree+0x89/0x260 fs/super.c:1530 do_new_mount+0x251/0xb40 fs/namespace.c:3037 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page_list+0x138/0x9e0 mm/page_alloc.c:3673 release_pages+0x1264/0x12c0 mm/swap.c:1015 __pagevec_release+0x71/0xe0 mm/swap.c:1035 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x564/0x13b0 mm/shmem.c:965 shmem_truncate_range mm/shmem.c:1064 [inline] shmem_evict_inode+0x1dc/0x970 mm/shmem.c:1146 evict+0x4b6/0x8b0 fs/inode.c:650 iput_final fs/inode.c:1779 [inline] iput+0x651/0x7e0 fs/inode.c:1805 dentry_unlink_inode+0x338/0x3e0 fs/dcache.c:380 __dentry_kill+0x45b/0x660 fs/dcache.c:586 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x47/0x90 fs/dcache.c:893 do_renameat2+0xa33/0xfc0 fs/namei.c:4995 __do_sys_rename fs/namei.c:5039 [inline] __se_sys_rename fs/namei.c:5037 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5037 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff88812cd94200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812cd94280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88812cd94300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88812cd94380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812cd94400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================