ntfs3: loop5: Different NTFS' sector size (2048) and media sector size (512) ================================================================== BUG: KASAN: slab-out-of-bounds in memcmp lib/string.c:683 [inline] BUG: KASAN: slab-out-of-bounds in bcmp+0xbe/0x1e0 lib/string.c:715 Read of size 8 at addr ffff888032451350 by task syz-executor.5/9173 CPU: 1 PID: 9173 Comm: syz-executor.5 Not tainted 6.1.0-syzkaller-13781-gaeba12b26c79 #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+0x1b1/0x290 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x1f0 mm/kasan/report.c:417 kasan_report+0xcd/0x100 mm/kasan/report.c:517 memcmp lib/string.c:683 [inline] bcmp+0xbe/0x1e0 lib/string.c:715 _Z6memcmpPKvU17pass_object_size0S0_U17pass_object_size0m include/linux/fortify-string.h:658 [inline] ntfs_read_mft fs/ntfs3/inode.c:253 [inline] ntfs_iget5+0x1101/0x36f0 fs/ntfs3/inode.c:501 ntfs_security_init+0x112/0x870 fs/ntfs3/fsntfs.c:1833 ntfs_fill_super+0x3ef7/0x4370 fs/ntfs3/super.c:1238 get_tree_bdev+0x400/0x620 fs/super.c:1282 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 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: 0033:0x7f869b88d60a 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:00007f869c529f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000001f3a4 RCX: 00007f869b88d60a RDX: 0000000020000180 RSI: 0000000020000040 RDI: 00007f869c529fe0 RBP: 00007f869c52a020 R08: 00007f869c52a020 R09: 0000000000000010 R10: 0000000000000010 R11: 0000000000000202 R12: 0000000020000180 R13: 0000000020000040 R14: 00007f869c529fe0 R15: 0000000020000200 Allocated by task 8939: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc+0xaf/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1f3/0x480 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1718 do_dentry_open+0x306/0x11b0 fs/open.c:869 vfs_open fs/open.c:1013 [inline] dentry_open+0xc1/0x120 fs/open.c:1029 ovl_dir_read+0x26/0x540 fs/overlayfs/readdir.c:300 ovl_indexdir_cleanup+0x221/0x790 fs/overlayfs/readdir.c:1166 ovl_get_indexdir+0x53b/0x680 fs/overlayfs/super.c:1510 ovl_fill_super+0x195b/0x2790 fs/overlayfs/super.c:2025 mount_nodev+0x52/0xe0 fs/super.c:1405 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 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 Freed by task 8939: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3800 tomoyo_realpath_from_path+0x5b9/0x5f0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1f3/0x480 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1718 do_dentry_open+0x306/0x11b0 fs/open.c:869 vfs_open fs/open.c:1013 [inline] dentry_open+0xc1/0x120 fs/open.c:1029 ovl_dir_read+0x26/0x540 fs/overlayfs/readdir.c:300 ovl_indexdir_cleanup+0x221/0x790 fs/overlayfs/readdir.c:1166 ovl_get_indexdir+0x53b/0x680 fs/overlayfs/super.c:1510 ovl_fill_super+0x195b/0x2790 fs/overlayfs/super.c:2025 mount_nodev+0x52/0xe0 fs/super.c:1405 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 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 ffff888032450000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 848 bytes to the right of 4096-byte region [ffff888032450000, ffff888032451000) The buggy address belongs to the physical page: page:ffffea0000c91400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32450 head:ffffea0000c91400 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012842140 dead000000000122 0000000000000000 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 8939, tgid 8938 (syz-executor.0), ts 315656614100, free_ts 315629837450 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x9e/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1f3/0x480 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1718 do_dentry_open+0x306/0x11b0 fs/open.c:869 vfs_open fs/open.c:1013 [inline] dentry_open+0xc1/0x120 fs/open.c:1029 ovl_dir_read+0x26/0x540 fs/overlayfs/readdir.c:300 ovl_indexdir_cleanup+0x221/0x790 fs/overlayfs/readdir.c:1166 ovl_get_indexdir+0x53b/0x680 fs/overlayfs/super.c:1510 ovl_fill_super+0x195b/0x2790 fs/overlayfs/super.c:2025 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1a5/0x1e0 mm/slub.c:2637 put_cpu_partial+0x106/0x170 mm/slub.c:2713 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x183/0x320 mm/slub.c:3483 __d_alloc+0x31/0x750 fs/dcache.c:1769 d_alloc fs/dcache.c:1849 [inline] d_alloc_parallel+0xcb/0x1240 fs/dcache.c:2638 __lookup_slow+0xfd/0x3a0 fs/namei.c:1670 lookup_one+0x478/0x6c0 fs/namei.c:2741 ovl_lookup_upper fs/overlayfs/overlayfs.h:343 [inline] ovl_workdir_create+0x20f/0x8f0 fs/overlayfs/super.c:773 ovl_make_workdir+0x107/0xdf0 fs/overlayfs/super.c:1294 ovl_get_workdir+0x2e4/0x410 fs/overlayfs/super.c:1444 ovl_fill_super+0x19d7/0x2790 fs/overlayfs/super.c:2000 Memory state around the buggy address: ffff888032451200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888032451280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888032451300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888032451380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888032451400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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