================================================================== BUG: KASAN: use-after-free in reiserfs_release_objectid+0x50c/0x750 fs/reiserfs/objectid.c:165 Read of size 14568 at addr ffff8880288af0d0 by task syz-executor282/5080 CPU: 1 PID: 5080 Comm: syz-executor282 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 memmove+0x24/0x60 mm/kasan/shadow.c:54 reiserfs_release_objectid+0x50c/0x750 fs/reiserfs/objectid.c:165 remove_save_link+0x220/0x3f0 fs/reiserfs/super.c:542 reiserfs_evict_inode+0x48d/0x540 fs/reiserfs/inode.c:91 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput fs/inode.c:1774 [inline] iput+0x52b/0x8e0 fs/inode.c:1760 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x6ac/0xe10 fs/dcache.c:913 do_renameat2+0xb32/0xc30 fs/namei.c:4933 __do_sys_rename fs/namei.c:4977 [inline] __se_sys_rename fs/namei.c:4975 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:4975 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3429d54369 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff83c5a338 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f3429d54369 RDX: 00007f3429d54369 RSI: 0000000020000200 RDI: 0000000020000140 RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d R10: 000000000000000d R11: 0000000000000246 R12: 00007f3429d13540 R13: 00007fff83c5a360 R14: 00007fff83c5a34c R15: 00007fff83c5a350 The buggy address belongs to the physical page: page:ffffea0000a22bc0 refcount:2 mapcount:0 mapping:ffff88801e4bf5f8 index:0x10 pfn:0x288af memcg:ffff88813ff40000 aops:def_blk_aops ino:700004 flags: 0xfff00000022036(referenced|uptodate|lru|active|private|mappedtodisk|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000022036 ffffea0000a22b88 ffffea0001f3bcc8 ffff88801e4bf5f8 raw: 0000000000000010 ffff888072c10d98 00000002ffffffff ffff88813ff40000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5087, tgid 5087 (udevd), ts 59750613992, free_ts 49039027840 prep_new_page mm/page_alloc.c:2549 [inline] get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4324 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5590 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2281 folio_alloc+0x20/0x70 mm/mempolicy.c:2291 filemap_alloc_folio+0x3a3/0x450 mm/filemap.c:972 page_cache_ra_unbounded+0x1ae/0x5e0 mm/readahead.c:248 do_page_cache_ra mm/readahead.c:300 [inline] force_page_cache_ra+0x333/0x470 mm/readahead.c:331 page_cache_sync_ra+0x105/0x200 mm/readahead.c:705 page_cache_sync_readahead include/linux/pagemap.h:1210 [inline] filemap_get_pages+0x2ca/0x16b0 mm/filemap.c:2600 filemap_read+0x315/0xc00 mm/filemap.c:2694 blkdev_read_iter+0x3eb/0x760 block/fops.c:591 call_read_iter include/linux/fs.h:1846 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x681/0x930 fs/read_write.c:470 ksys_read+0x12b/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1451 [inline] free_pcp_prepare+0x4d0/0x910 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3482 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] jbd2_alloc_handle include/linux/jbd2.h:1594 [inline] new_handle fs/jbd2/transaction.c:476 [inline] jbd2__journal_start+0x18a/0x6b0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x706/0x890 fs/ext4/ext4_jbd2.c:111 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0xa5/0x130 fs/ext4/inode.c:6107 __mark_inode_dirty+0x247/0x1250 fs/fs-writeback.c:2419 mark_inode_dirty include/linux/fs.h:2128 [inline] generic_write_end+0x354/0x440 fs/buffer.c:2226 ext4_da_write_end+0x1f5/0xa50 fs/ext4/inode.c:3175 generic_perform_write+0x316/0x570 mm/filemap.c:3783 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:285 ext4_file_write_iter+0x8bf/0x1710 fs/ext4/file.c:700 Memory state around the buggy address: ffff8880288aff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880288aff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880288b0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880288b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880288b0100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================