EXT4-fs error (device loop2): ext4_orphan_get:1394: comm syz.2.93: couldn't read orphan inode 15 (err -117) EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 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 ffff888029457f10 by task syz.2.93/6307 CPU: 0 UID: 0 PID: 6307 Comm: syz.2.93 Not tainted 6.14.0-rc1-next-20250207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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+0x315/0x660 fs/ext4/namei.c:2164 make_indexed_dir+0xd0e/0x1350 fs/ext4/namei.c:2361 ext4_add_entry+0xbcd/0xe00 fs/ext4/namei.c:2462 ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2803 ext4_symlink+0x9e4/0xcf0 fs/ext4/namei.c:3440 vfs_symlink+0x137/0x2e0 fs/namei.c:4666 do_symlinkat+0x222/0x3a0 fs/namei.c:4692 __do_sys_symlink fs/namei.c:4713 [inline] __se_sys_symlink fs/namei.c:4711 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4711 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: 0033:0x7f37d518cde9 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:00007f37d6087038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007f37d53a5fa0 RCX: 00007f37d518cde9 RDX: 0000000000000000 RSI: 0000400000000cc0 RDI: 0000400000000dc0 RBP: 00007f37d520e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f37d53a5fa0 R15: 00007ffc168216f8 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff888148d4d8f8 index:0x3f pfn:0x29457 memcg:ffff88807d60e000 aops:def_blk_aops ino:700002 dentry name(?):"" flags: 0xfff10000004014(referenced|dirty|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff10000004014 0000000000000000 dead000000000122 ffff888148d4d8f8 raw: 000000000000003f ffff88805d129488 00000003ffffffff ffff88807d60e000 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 6307, tgid 6306 (syz.2.93), ts 136807172529, free_ts 136757752430 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1629 prep_new_page mm/page_alloc.c:1637 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3555 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4817 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline] alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2371 filemap_alloc_folio_noprof+0xe1/0x540 mm/filemap.c:1019 __filemap_get_folio+0x438/0xae0 mm/filemap.c:1970 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:866 ext4_bread+0x2e/0x180 fs/ext4/inode.c:914 ext4_append+0x327/0x5c0 fs/ext4/namei.c:83 make_indexed_dir+0x430/0x1350 fs/ext4/namei.c:2282 ext4_add_entry+0xbcd/0xe00 fs/ext4/namei.c:2462 ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2803 ext4_symlink+0x9e4/0xcf0 fs/ext4/namei.c:3440 page last free pid 5840 tgid 5840 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1205 [inline] free_unref_folios+0xe40/0x18b0 mm/page_alloc.c:2785 folios_put_refs+0x6dc/0x7e0 mm/swap.c:992 folio_batch_release include/linux/pagevec.h:101 [inline] truncate_inode_pages_range+0x460/0x10e0 mm/truncate.c:373 f2fs_put_super+0x701/0x1110 fs/f2fs/super.c:1659 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 kill_f2fs_super+0x37d/0x6d0 fs/f2fs/super.c:4994 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1424 task_work_run+0x24f/0x310 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888029457f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888029457f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888029458000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888029458080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029458100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================