loop0: detected capacity change from 0 to 64 ntfs: (device loop0): is_boot_sector_ntfs(): Invalid end of sector marker. ================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0xc02/0xce0 fs/ntfs/attrib.c:597 Read of size 2 at addr ffff888021f8e009 by task syz-executor364/3610 CPU: 0 PID: 3610 Comm: syz-executor364 Not tainted 6.0.0-rc2-next-20220824-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 ntfs_attr_find+0xc02/0xce0 fs/ntfs/attrib.c:597 ntfs_attr_lookup+0x1056/0x2070 fs/ntfs/attrib.c:1193 ntfs_read_inode_mount+0x89a/0x2580 fs/ntfs/inode.c:1845 ntfs_fill_super+0x1799/0x92f0 fs/ntfs/super.c:2855 mount_bdev+0x34d/0x410 fs/super.c:1400 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 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: 0033:0x7efcb8bde17a Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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:00007ffea5c543c8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffea5c54420 RCX: 00007efcb8bde17a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffea5c543e0 RBP: 00007ffea5c543e0 R08: 00007ffea5c54420 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000230 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000002 Allocated by task 3597: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3229 [inline] slab_alloc mm/slub.c:3237 [inline] __kmem_cache_alloc_lru mm/slub.c:3244 [inline] kmem_cache_alloc+0x2b7/0x3d0 mm/slub.c:3253 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags include/linux/audit.h:320 [inline] getname+0x8e/0xd0 fs/namei.c:218 do_sys_openat2+0xf5/0x4c0 fs/open.c:1302 do_sys_open fs/open.c:1324 [inline] __do_sys_openat fs/open.c:1340 [inline] __se_sys_openat fs/open.c:1335 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1335 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 Freed by task 3597: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:367 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1740 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1766 slab_free mm/slub.c:3497 [inline] kmem_cache_free+0xe7/0x5b0 mm/slub.c:3519 putname fs/namei.c:271 [inline] putname+0xfe/0x140 fs/namei.c:257 do_sys_openat2+0x153/0x4c0 fs/open.c:1317 do_sys_open fs/open.c:1324 [inline] __do_sys_openat fs/open.c:1340 [inline] __se_sys_openat fs/open.c:1335 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1335 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 The buggy address belongs to the object at ffff888021f8d500 which belongs to the cache names_cache of size 4096 The buggy address is located 2825 bytes inside of 4096-byte region [ffff888021f8d500, ffff888021f8e500) The buggy address belongs to the physical page: page:ffffea000087e200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21f88 head:ffffea000087e200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8880119d4640 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3597, tgid 3597 (sed), ts 36241512313, free_ts 36198575008 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5507 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1810 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1955 new_slab mm/slub.c:2015 [inline] ___slab_alloc+0xa3e/0x11d0 mm/slub.c:3017 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3104 slab_alloc_node mm/slub.c:3195 [inline] slab_alloc mm/slub.c:3237 [inline] __kmem_cache_alloc_lru mm/slub.c:3244 [inline] kmem_cache_alloc+0x31c/0x3d0 mm/slub.c:3253 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9a/0xe0 include/linux/audit.h:320 vfs_fstatat+0x73/0xb0 fs/stat.c:254 __do_sys_newfstatat+0x91/0x110 fs/stat.c:425 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:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3229 [inline] slab_alloc mm/slub.c:3237 [inline] __kmem_cache_alloc_lru mm/slub.c:3244 [inline] kmem_cache_alloc+0x2b7/0x3d0 mm/slub.c:3253 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9a/0xe0 include/linux/audit.h:320 vfs_fstatat+0x73/0xb0 fs/stat.c:254 __do_sys_newfstatat+0x91/0x110 fs/stat.c:425 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: ffff888021f8df00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888021f8df80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888021f8e000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888021f8e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888021f8e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================