ntfs3: loop3: Failed to load $Extend. ================================================================== BUG: KASAN: use-after-free in hdr_find_e.isra.0+0x527/0x590 fs/ntfs3/index.c:689 Read of size 2 at addr ffff8880874e9820 by task syz-executor.3/16012 CPU: 1 PID: 16012 Comm: syz-executor.3 Not tainted 6.1.0-rc4-syzkaller-00299-gf9bbe0c99e5b #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+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 hdr_find_e.isra.0+0x527/0x590 fs/ntfs3/index.c:689 indx_find+0x4ff/0x980 fs/ntfs3/index.c:1085 dir_search_u+0x232/0x3f0 fs/ntfs3/dir.c:254 ntfs_lookup+0x174/0x1e0 fs/ntfs3/namei.c:83 lookup_open.isra.0+0x76a/0x12a0 fs/namei.c:3391 open_last_lookups fs/namei.c:3481 [inline] path_openat+0x996/0x2860 fs/namei.c:3710 do_filp_open+0x1b6/0x400 fs/namei.c:3740 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_open fs/open.c:1334 [inline] __se_sys_open fs/open.c:1330 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1330 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f335b08b639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f335bece168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f335b1abf80 RCX: 00007f335b08b639 RDX: 0000000000000000 RSI: 000000000001c100 RDI: 0000000020000440 RBP: 00007f335b0e67e1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4d591c5f R14: 00007f335bece300 R15: 0000000000022000 The buggy address belongs to the physical page: page:ffffea00021d3a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x874e9 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 7308, tgid 7305 (syz-executor.0), ts 665671236817, free_ts 665800470347 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5555 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285 vm_area_alloc_pages mm/vmalloc.c:2975 [inline] __vmalloc_area_node mm/vmalloc.c:3043 [inline] __vmalloc_node_range+0x954/0x13a0 mm/vmalloc.c:3213 __vmalloc_node mm/vmalloc.c:3278 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3351 bpf_check+0x1da/0xb110 kernel/bpf/verifier.c:15190 bpf_prog_load+0x13cb/0x2230 kernel/bpf/syscall.c:2605 __sys_bpf+0x1605/0x4cf0 kernel/bpf/syscall.c:4965 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 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:1459 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3483 __vunmap+0x85d/0xd30 mm/vmalloc.c:2713 __vfree+0x3c/0xd0 mm/vmalloc.c:2761 vfree+0x5a/0x90 mm/vmalloc.c:2792 bpf_check+0x618/0xb110 kernel/bpf/verifier.c:15402 bpf_prog_load+0x13cb/0x2230 kernel/bpf/syscall.c:2605 __sys_bpf+0x1605/0x4cf0 kernel/bpf/syscall.c:4965 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880874e9700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880874e9780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8880874e9800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880874e9880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880874e9900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================