loop2: detected capacity change from 0 to 1949 ================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_attr_find+0xce9/0xd80 fs/ntfs/attrib.c:597 Read of size 2 at addr ffff8880721a5142 by task syz-executor.2/8247 CPU: 0 PID: 8247 Comm: syz-executor.2 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 ntfs_attr_find+0xce9/0xd80 fs/ntfs/attrib.c:597 ntfs_attr_lookup+0x4c3/0x2370 ntfs_read_inode_mount+0x8c9/0x2680 fs/ntfs/inode.c:1845 ntfs_fill_super+0x187a/0x2bf0 fs/ntfs/super.c:2855 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 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: 0033:0x7f762148cada Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 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:00007f76226acf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f762148cada RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f76226acfe0 RBP: 00007f76226ad020 R08: 00007f76226ad020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f76226acfe0 R15: 0000000020079ca0 Allocated by task 8247: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x97/0x310 mm/slub.c:3289 kmalloc include/linux/slab.h:600 [inline] __ntfs_malloc fs/ntfs/malloc.h:33 [inline] ntfs_malloc_nofs fs/ntfs/malloc.h:52 [inline] ntfs_read_inode_mount+0x2fb/0x2680 fs/ntfs/inode.c:1794 ntfs_fill_super+0x187a/0x2bf0 fs/ntfs/super.c:2855 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 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 Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 insert_work+0x54/0x3e0 kernel/workqueue.c:1358 __queue_work+0xa31/0xce0 kernel/workqueue.c:1517 queue_work_on+0x11b/0x200 kernel/workqueue.c:1545 rcu_do_batch kernel/rcu/tree.c:2248 [inline] rcu_core+0x981/0x1610 kernel/rcu/tree.c:2508 __do_softirq+0x277/0x738 kernel/softirq.c:571 Second to last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x970 kernel/rcu/tree.c:2796 put_super fs/super.c:310 [inline] deactivate_locked_super+0xdb/0xf0 fs/super.c:342 mount_bdev+0x288/0x3a0 fs/super.c:1402 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 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 The buggy address belongs to the object at ffff8880721a4000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 322 bytes to the right of 4096-byte region [ffff8880721a4000, ffff8880721a5000) The buggy address belongs to the physical page: page:ffffea0001c86800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x721a0 head:ffffea0001c86800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000bda000 dead000000000002 ffff888012042140 raw: 0000000000000000 0000000000040004 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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2972, tgid 2972 (udevd), ts 120198991144, free_ts 119690575079 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmalloc+0x2bd/0x370 mm/slub.c:4425 kmalloc include/linux/slab.h:605 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x227/0x670 security/tomoyo/file.c:822 security_inode_getattr+0xc0/0x140 security/security.c:1347 vfs_getattr fs/stat.c:158 [inline] vfs_statx+0x188/0x4a0 fs/stat.c:233 vfs_fstatat fs/stat.c:267 [inline] __do_sys_newfstatat fs/stat.c:437 [inline] __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:431 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 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+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3476 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc+0x1a6/0x310 mm/slub.c:3273 kmem_cache_zalloc include/linux/slab.h:723 [inline] __alloc_file+0x26/0x230 fs/file_table.c:138 alloc_empty_file+0xa9/0x1b0 fs/file_table.c:187 alloc_file+0x58/0x5e0 fs/file_table.c:229 alloc_file_pseudo+0x24a/0x300 fs/file_table.c:272 sock_alloc_file+0xb4/0x240 net/socket.c:463 sock_map_fd net/socket.c:487 [inline] __sys_socket+0x196/0x360 net/socket.c:1644 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1647 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: ffff8880721a5000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880721a5080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880721a5100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880721a5180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880721a5200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================