REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names ================================================================== BUG: KASAN: use-after-free in reiserfs_get_unused_objectid+0x22d/0x480 fs/reiserfs/objectid.c:87 Read of size 250888 at addr ffff88807327e058 by task syz-executor302/3548 CPU: 0 PID: 3548 Comm: syz-executor302 Not tainted 6.1.29-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 reiserfs_get_unused_objectid+0x22d/0x480 fs/reiserfs/objectid.c:87 reiserfs_new_inode+0x2b8/0x1d90 fs/reiserfs/inode.c:1944 reiserfs_mkdir+0x5ac/0x8f0 fs/reiserfs/namei.c:845 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] create_privroot fs/reiserfs/xattr.c:882 [inline] reiserfs_xattr_init+0x348/0x730 fs/reiserfs/xattr.c:1005 reiserfs_fill_super+0x2203/0x2620 fs/reiserfs/super.c:2175 mount_bdev+0x26d/0x3a0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0c81ee6d9a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 f8 03 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0c81688078 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f0c81ee6d9a RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007f0c81688090 RBP: 0000000000000004 R08: 00007f0c816880d0 R09: 0000000000001132 R10: 0000000000008008 R11: 0000000000000286 R12: 00007f0c816886b8 R13: 00007f0c81688090 R14: 00007f0c816880d0 R15: 0000000000008008 The buggy address belongs to the physical page: page:ffffea0001cc9f80 refcount:3 mapcount:0 mapping:ffff888140d775f8 index:0x10 pfn:0x7327e memcg:ffff88813ff70000 aops:def_blk_aops ino:700000 flags: 0xfff08000002042(referenced|workingset|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff08000002042 0000000000000000 dead000000000122 ffff888140d775f8 raw: 0000000000000010 ffff888073b402b8 00000003ffffffff ffff88813ff70000 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 3548, tgid 3542 (syz-executor302), ts 51487150241, free_ts 51477328355 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 folio_alloc+0x1a/0x50 mm/mempolicy.c:2290 filemap_alloc_folio+0xda/0x4f0 mm/filemap.c:971 __filemap_get_folio+0x711/0xe30 mm/filemap.c:1965 pagecache_get_page+0x28/0x250 mm/folio-compat.c:110 find_or_create_page include/linux/pagemap.h:613 [inline] grow_dev_page fs/buffer.c:946 [inline] grow_buffers fs/buffer.c:1011 [inline] __getblk_slow fs/buffer.c:1038 [inline] __getblk_gfp+0x211/0xa20 fs/buffer.c:1333 __bread_gfp+0x2a/0x370 fs/buffer.c:1367 sb_bread include/linux/buffer_head.h:338 [inline] read_super_block+0x91/0x800 fs/reiserfs/super.c:1604 reiserfs_fill_super+0x90e/0x2620 fs/reiserfs/super.c:1966 mount_bdev+0x26d/0x3a0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] free_pcp_prepare mm/page_alloc.c:1510 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530 release_pages+0x2836/0x2b40 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xce/0x1f0 mm/mmu_gather.c:361 unmap_region+0x29f/0x2f0 mm/mmap.c:2229 do_mas_align_munmap+0xe98/0x15e0 mm/mmap.c:2482 do_mas_munmap+0x246/0x2b0 mm/mmap.c:2540 __vm_munmap+0x268/0x370 mm/mmap.c:2817 __do_sys_munmap mm/mmap.c:2842 [inline] __se_sys_munmap mm/mmap.c:2839 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2839 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880732b5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880732b5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880732b6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880732b6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880732b6100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================