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 strlen+0x7d/0xa0 lib/string.c:418 Read of size 1 at addr ffff88807183c0c4 by task syz-executor266/4998 CPU: 0 PID: 4998 Comm: syz-executor266 Not tainted 6.4.0-rc1-syzkaller-00177-gbb7c241fae62 #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+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 strlen+0x7d/0xa0 lib/string.c:418 __fortify_strlen include/linux/fortify-string.h:241 [inline] set_de_name_and_namelen+0x4c4/0x6a0 fs/reiserfs/namei.c:82 linear_search_in_dir_item fs/reiserfs/namei.c:262 [inline] reiserfs_find_entry.part.0+0x3db/0xdf0 fs/reiserfs/namei.c:331 reiserfs_find_entry fs/reiserfs/namei.c:368 [inline] reiserfs_lookup+0x24e/0x610 fs/reiserfs/namei.c:368 __lookup_slow+0x24c/0x460 fs/namei.c:1690 lookup_one_len+0x16e/0x1a0 fs/namei.c:2742 reiserfs_lookup_privroot+0x96/0x210 fs/reiserfs/xattr.c:976 reiserfs_fill_super+0x1a8d/0x2eb0 fs/reiserfs/super.c:2192 mount_bdev+0x357/0x420 fs/super.c:1380 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 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: 0033:0x7f8bfe77c25a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 98 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffca86059d8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8bfe77c25a RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 00007ffca86059e0 RBP: 00007ffca86059e0 R08: 00007ffca8605a20 R09: 0000000000000000 R10: 0000000000008001 R11: 0000000000000286 R12: 0000000000000004 R13: 000055555651e2c0 R14: 00007ffca8605a20 R15: 0000000000000000 The buggy address belongs to the physical page: page:ffffea0001c60f00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x7183c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001c60f48 ffff8880b9843660 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 11119347758, free_ts 11881422708 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 split_map_pages+0x1ef/0x520 mm/compaction.c:97 isolate_freepages_range+0x313/0x350 mm/compaction.c:735 alloc_contig_range+0x2fa/0x4a0 mm/page_alloc.c:6869 __alloc_contig_pages mm/page_alloc.c:6892 [inline] alloc_contig_pages+0x361/0x4d0 mm/page_alloc.c:6972 debug_vm_pgtable_alloc_huge_page mm/debug_vm_pgtable.c:1090 [inline] init_args mm/debug_vm_pgtable.c:1273 [inline] debug_vm_pgtable+0x91f/0x4210 mm/debug_vm_pgtable.c:1311 do_one_initcall+0x102/0x540 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x64e/0xba0 init/main.c:1571 kernel_init+0x1e/0x2c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 free_contig_range+0xb5/0x180 mm/page_alloc.c:6994 destroy_args+0x6c4/0x920 mm/debug_vm_pgtable.c:1023 debug_vm_pgtable+0x2412/0x4210 mm/debug_vm_pgtable.c:1403 do_one_initcall+0x102/0x540 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x64e/0xba0 init/main.c:1571 kernel_init+0x1e/0x2c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88807183bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807183c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88807183c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88807183c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88807183c180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================