REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP ================================================================== BUG: KASAN: use-after-free in reiserfs_release_objectid+0x572/0x810 fs/reiserfs/objectid.c:165 Read of size 8188 at addr ffff88805c594050 by task syz.4.235/7229 CPU: 0 PID: 7229 Comm: syz.4.235 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xa8/0x210 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x241/0x290 mm/kasan/generic.c:187 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 reiserfs_release_objectid+0x572/0x810 fs/reiserfs/objectid.c:165 remove_save_link+0x2b3/0x3e0 fs/reiserfs/super.c:542 reiserfs_evict_inode+0x3b2/0x4c0 fs/reiserfs/inode.c:91 evict+0x4ca/0x8d0 fs/inode.c:705 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 do_renameat2+0x8f9/0xce0 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5066 [inline] __se_sys_renameat2 fs/namei.c:5063 [inline] __x64_sys_renameat2+0xd2/0xe0 fs/namei.c:5063 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc41779c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc4185a3028 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007fc417a16180 RCX: 00007fc41779c819 RDX: 0000000000000004 RSI: 0000200000000000 RDI: 0000000000000004 RBP: 00007fc417832c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000200 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc417a16218 R14: 00007fc417a16180 R15: 00007ffcec156858 The buggy address belongs to the physical page: page:ffffea0001716500 refcount:2 mapcount:0 mapping:ffff888148c8b678 index:0x10 pfn:0x5c594 memcg:ffff88807d32e000 aops:def_blk_aops ino:700004 flags: 0xfff5800002822c(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff5800002822c ffffea00017164c8 ffffea00016e4608 ffff888148c8b678 raw: 0000000000000010 ffff88804ee891d0 00000002ffffffff ffff88807d32e000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 7197, tgid 7196 (syz.4.235), ts 139239040544, free_ts 138893159792 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581 prep_new_page mm/page_alloc.c:1588 [inline] get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004 __filemap_get_folio+0x3ea/0xbb0 mm/filemap.c:1962 grow_dev_page fs/buffer.c:1058 [inline] grow_buffers fs/buffer.c:1118 [inline] __getblk_slow fs/buffer.c:1145 [inline] __getblk_gfp+0x223/0x660 fs/buffer.c:1439 __bread_gfp+0x2a/0x330 fs/buffer.c:1473 sb_bread include/linux/buffer_head.h:326 [inline] read_super_block+0x91/0x7c0 fs/reiserfs/super.c:1604 reiserfs_fill_super+0x7ad/0x23b0 fs/reiserfs/super.c:1966 mount_bdev+0x221/0x2d0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1181 [inline] free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504 release_pages+0x1f7a/0x2200 mm/swap.c:1022 folios_put include/linux/mm.h:1548 [inline] mlock_folio_batch+0x65b8/0x6d50 mm/mlock.c:209 munlock_folio+0x30f/0x780 mm/mlock.c:304 __collapse_huge_page_copy_succeeded mm/khugepaged.c:718 [inline] __collapse_huge_page_copy mm/khugepaged.c:807 [inline] collapse_huge_page mm/khugepaged.c:1194 [inline] hpage_collapse_scan_pmd+0x3077/0x3ff0 mm/khugepaged.c:1393 madvise_collapse+0x6ac/0xdc0 mm/khugepaged.c:2747 madvise_vma_behavior mm/madvise.c:1092 [inline] madvise_walk_vmas mm/madvise.c:1266 [inline] do_madvise+0x92f/0x3760 mm/madvise.c:1446 __do_sys_madvise mm/madvise.c:1459 [inline] __se_sys_madvise mm/madvise.c:1457 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1457 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88805c594f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805c594f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805c595000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88805c595080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805c595100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================