EXT4-fs error (device loop0): ext4_xattr_ibody_find:2240: inode #15: comm syz.0.17: corrupted in-inode xattr: invalid ea_ino EXT4-fs error (device loop0): ext4_orphan_get:1394: comm syz.0.17: couldn't read orphan inode 15 (err -117) EXT4-fs (loop0): mounted filesystem 00000007-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KASAN: slab-use-after-free in ext4_insert_dentry+0x36a/0x6d0 fs/ext4/namei.c:2119 Write of size 250 at addr ffff888030abdf18 by task syz.0.17/6557 CPU: 0 UID: 0 PID: 6557 Comm: syz.0.17 Not tainted 6.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 ext4_insert_dentry+0x36a/0x6d0 fs/ext4/namei.c:2119 add_dirent_to_buf+0x3d9/0x740 fs/ext4/namei.c:2164 make_indexed_dir+0xf98/0x15f0 fs/ext4/namei.c:2361 ext4_add_entry+0xcf7/0xfa0 fs/ext4/namei.c:2462 ext4_mkdir+0x554/0xcf0 fs/ext4/namei.c:3039 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 __do_sys_mkdirat fs/namei.c:4349 [inline] __se_sys_mkdirat fs/namei.c:4347 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fb9f0380809 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:00007fb9f126a058 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fb9f0545fa0 RCX: 00007fb9f0380809 RDX: 5be60480b9579340 RSI: 0000000020000940 RDI: ffffffffffffff9c RBP: 00007fb9f03f393e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb9f0545fa0 R15: 00007ffec9aa3458 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff88802284cd78 index:0x3f pfn:0x30abd memcg:ffff88801ca6c000 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0xfff00000004114(referenced|dirty|active|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000004114 0000000000000000 dead000000000122 ffff88802284cd78 raw: 000000000000003f ffff8880721d5658 00000003ffffffff ffff88801ca6c000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x148c40(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL), pid 6557, tgid 6556 (syz.0.17), ts 124071917626, free_ts 124067824948 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ee/0x220 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x3607/0x3750 mm/page_alloc.c:3474 __alloc_pages_noprof+0x256/0x690 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_pages_noprof mm/mempolicy.c:2344 [inline] folio_alloc_noprof+0x128/0x180 mm/mempolicy.c:2351 filemap_alloc_folio_noprof+0xdf/0x500 mm/filemap.c:1009 __filemap_get_folio+0x446/0xbc0 mm/filemap.c:1951 grow_dev_folio fs/buffer.c:1039 [inline] grow_buffers fs/buffer.c:1105 [inline] __getblk_slow fs/buffer.c:1131 [inline] bdev_getblk+0x1d8/0x550 fs/buffer.c:1431 getblk_unmovable include/linux/buffer_head.h:369 [inline] ext4_getblk+0x31b/0x880 fs/ext4/inode.c:864 ext4_bread+0x2e/0x180 fs/ext4/inode.c:912 ext4_append+0x327/0x5c0 fs/ext4/namei.c:83 make_indexed_dir+0x523/0x15f0 fs/ext4/namei.c:2282 ext4_add_entry+0xcf7/0xfa0 fs/ext4/namei.c:2462 ext4_mkdir+0x554/0xcf0 fs/ext4/namei.c:3039 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 page last free pid 6560 tgid 6560 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xdd5/0x1100 mm/page_alloc.c:2657 __slab_free+0x31a/0x3d0 mm/slub.c:4509 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x60 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d4/0x340 mm/slub.c:4160 getname_flags+0xb7/0x540 fs/namei.c:139 getname_maybe_null include/linux/fs.h:2796 [inline] vfs_fstatat+0x3f/0x130 fs/stat.c:361 __do_sys_newfstatat fs/stat.c:530 [inline] __se_sys_newfstatat fs/stat.c:524 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:524 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e Memory state around the buggy address: ffff888030abdf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888030abdf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888030abe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888030abe080: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb ffff888030abe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================