loop0: detected capacity change from 0 to 512 EXT4-fs error (device loop0): ext4_xattr_ibody_find:2240: inode #15: comm syz.0.0: corrupted in-inode xattr: invalid ea_ino EXT4-fs error (device loop0): ext4_orphan_get:1394: comm syz.0.0: 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 251 at addr ffff8880396a0f14 by task syz.0.0/5321 CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc3-syzkaller-00082-gbaaa2567a712 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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+0x3d9/0x750 fs/ext4/namei.c:2164 make_indexed_dir+0xf98/0x1600 fs/ext4/namei.c:2361 ext4_add_entry+0xcf7/0xfa0 fs/ext4/namei.c:2462 ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2803 ext4_symlink+0x920/0xb50 fs/ext4/namei.c:3438 vfs_symlink+0x137/0x2e0 fs/namei.c:4669 do_symlinkat+0x222/0x3a0 fs/namei.c:4695 __do_sys_symlink fs/namei.c:4716 [inline] __se_sys_symlink fs/namei.c:4714 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4714 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0e75985d29 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:00007f0e7679b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007f0e75b75fa0 RCX: 00007f0e75985d29 RDX: 0000000000000000 RSI: 0000000020000cc0 RDI: 0000000020000dc0 RBP: 00007f0e75a01aa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0e75b75fa0 R15: 00007fff734ab228 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff888031cbcd78 index:0x3f pfn:0x396a0 memcg:ffff888052aec000 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff08000004214(referenced|dirty|workingset|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff08000004214 0000000000000000 dead000000000122 ffff888031cbcd78 raw: 000000000000003f ffff888043ea6570 00000003ffffffff ffff888052aec000 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 5321, tgid 5320 (syz.0.0), ts 69050986320, free_ts 69049631028 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_pages_noprof mm/mempolicy.c:2348 [inline] folio_alloc_noprof+0x128/0x180 mm/mempolicy.c:2355 filemap_alloc_folio_noprof+0xdf/0x500 mm/filemap.c:1009 __filemap_get_folio+0x41f/0x940 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+0x1d4/0x670 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+0x523/0x1600 fs/ext4/namei.c:2282 ext4_add_entry+0xcf7/0xfa0 fs/ext4/namei.c:2462 ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2803 ext4_symlink+0x920/0xb50 fs/ext4/namei.c:3438 vfs_symlink+0x137/0x2e0 fs/namei.c:4669 page last free pid 5322 tgid 5320 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657 __slab_free+0x2c2/0x380 mm/slub.c:4524 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+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4119 [inline] slab_alloc_node mm/slub.c:4168 [inline] kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4187 ext4_alloc_inode+0x2e/0x580 fs/ext4/super.c:1403 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 __ext4_new_inode+0x370/0x4380 fs/ext4/ialloc.c:959 ext4_create+0x279/0x550 fs/ext4/namei.c:2841 vfs_create+0x23c/0x3d0 fs/namei.c:3348 do_mknodat+0x447/0x5b0 fs/namei.c:4239 __do_sys_mknod fs/namei.c:4272 [inline] __se_sys_mknod fs/namei.c:4270 [inline] __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4270 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880396a0f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880396a0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880396a1000: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff8880396a1080: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880396a1100: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================