EXT4-fs error (device loop2): ext4_orphan_get:1394: comm syz.2.17: couldn't read orphan inode 15 (err -117) EXT4-fs (loop2): 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 ffff8880744dff18 by task syz.2.17/6031 CPU: 0 UID: 0 PID: 6031 Comm: syz.2.17 Not tainted 6.13.0-rc1-syzkaller-00001-ge70140ba0d2b #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+0x3d9/0x750 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_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+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2e78b7ff19 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:00007f2e799e4058 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f2e78d45fa0 RCX: 00007f2e78b7ff19 RDX: 0000000000000000 RSI: 00000000200005c0 RDI: ffffffffffffff9c RBP: 00007f2e78bf3986 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2e78d45fa0 R15: 00007ffe4f451c28 The buggy address belongs to the physical page: page: refcount:3 mapcount:0 mapping:ffff8880234958f8 index:0x3f pfn:0x744df memcg:ffff88805f8b2000 aops:def_blk_aops ino:700002 dentry name(?):"" flags: 0xfff00000004114(referenced|dirty|active|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000004114 0000000000000000 dead000000000122 ffff8880234958f8 raw: 000000000000003f ffff8880235aa3a0 00000003ffffffff ffff88805f8b2000 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 6031, tgid 6029 (syz.2.17), ts 79789335884, free_ts 77092909798 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+0x3651/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c: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+0x446/0xbd0 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+0x523/0x1600 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 5916 tgid 5916 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0xeb/0x130 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x2ea/0x3d0 mm/slub.c:4468 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:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4309 kmalloc_noprof include/linux/slab.h:901 [inline] call_modprobe kernel/module/kmod.c:83 [inline] __request_module+0x2b9/0x640 kernel/module/kmod.c:172 dev_load+0x18f/0x1f0 net/core/dev_ioctl.c:643 dev_ioctl+0x52e/0x1340 net/core/dev_ioctl.c:709 sock_do_ioctl+0x240/0x460 net/socket.c:1223 sock_ioctl+0x626/0x8e0 net/socket.c:1328 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 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: ffff8880744dff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880744dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880744e0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880744e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880744e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================