loop3: detected capacity change from 0 to 55 ================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_attr_find+0xce9/0xd80 fs/ntfs/attrib.c:597 Read of size 2 at addr ffff88807b9ad142 by task syz-executor.3/12530 CPU: 1 PID: 12530 Comm: syz-executor.3 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: 0033:0x7f9f3168cada 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:00007f9f32850f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f9f3168cada RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f9f32850fe0 RBP: 00007f9f32851020 R08: 00007f9f32851020 R09: 0000000020000000 R10: 0000000001008442 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f9f32850fe0 R15: 000000002007dc00 Allocated by task 12530: 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 ffff88807b9ac000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 322 bytes to the right of 4096-byte region [ffff88807b9ac000, ffff88807b9ad000) The buggy address belongs to the physical page: page:ffffea0001ee6a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7b9a8 head:ffffea0001ee6a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000886200 dead000000000002 ffff888012042140 raw: 0000000000000000 0000000080040004 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 4220, tgid 4218 (syz-executor.3), ts 1631592927011, free_ts 1629722034457 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_mount_acl security/tomoyo/mount.c:141 [inline] tomoyo_mount_permission+0x972/0xa90 security/tomoyo/mount.c:237 security_sb_mount+0x70/0xd0 security/security.c:979 path_mount+0xbd/0x1140 fs/namespace.c:3312 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 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_lru+0x175/0x2d0 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3107 [inline] shmem_alloc_inode+0x21/0x40 mm/shmem.c:3819 alloc_inode fs/inode.c:259 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018 new_inode+0x25/0x1d0 fs/inode.c:1046 shmem_get_inode+0x321/0xc30 mm/shmem.c:2327 shmem_mknod+0x54/0x1b0 mm/shmem.c:2890 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12d0/0x2df0 fs/namei.c:3688 do_filp_open+0x264/0x4f0 fs/namei.c:3718 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff88807b9ad000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807b9ad080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807b9ad100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807b9ad180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807b9ad200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================