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 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] BUG: KASAN: use-after-free in search_by_entry_key+0x579/0x1380 fs/reiserfs/namei.c:165 Read of size 4 at addr ffff888070075004 by task syz-executor151/5033 CPU: 1 PID: 5033 Comm: syz-executor151 Not tainted 6.6.0-rc3-syzkaller-00044-g633b47cb009d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] search_by_entry_key+0x579/0x1380 fs/reiserfs/namei.c:165 reiserfs_find_entry+0xf4b/0x19b0 fs/reiserfs/namei.c:322 reiserfs_lookup+0x1e2/0x580 fs/reiserfs/namei.c:368 __lookup_slow+0x282/0x3e0 fs/namei.c:1693 lookup_one_len+0x18b/0x2d0 fs/namei.c:2745 reiserfs_lookup_privroot+0x89/0x180 fs/reiserfs/xattr.c:977 reiserfs_fill_super+0x195b/0x2620 fs/reiserfs/super.c:2192 mount_bdev+0x237/0x300 fs/super.c:1629 legacy_get_tree+0xef/0x190 fs/fs_context.c:638 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8da3c7142a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007fff0d60b748 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8da3c7142a RDX: 0000000020000140 RSI: 0000000020000340 RDI: 00007fff0d60b790 RBP: 0000000000000004 R08: 00007fff0d60b7d0 R09: 000000000000111a R10: 000000000120c083 R11: 0000000000000286 R12: 00007fff0d60b790 R13: 00007fff0d60b7d0 R14: 0000000000000003 R15: 0000000000400000 The buggy address belongs to the physical page: page:ffffea0001c01d40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x70075 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001c01d88 ffff8880b9942220 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x8(__GFP_MOVABLE), pid 1, tgid 1 (swapper/0), ts 21569351496, free_ts 23916007026 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 split_map_pages+0x24a/0x510 mm/compaction.c:97 isolate_freepages_range+0x472/0x4d0 mm/compaction.c:775 alloc_contig_range+0x62e/0x9a0 mm/page_alloc.c:6217 __alloc_contig_pages mm/page_alloc.c:6240 [inline] alloc_contig_pages+0x3f4/0x4f0 mm/page_alloc.c:6320 debug_vm_pgtable_alloc_huge_page+0xb9/0x110 mm/debug_vm_pgtable.c:1095 init_args+0x837/0xb10 mm/debug_vm_pgtable.c:1277 debug_vm_pgtable+0xe0/0x540 mm/debug_vm_pgtable.c:1315 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x429/0x5c0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6342 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ba/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x429/0x5c0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Memory state around the buggy address: ffff888070074f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888070074f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888070075000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888070075080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888070075100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================