loop3: detected capacity change from 0 to 8226 ================================================================== BUG: KASAN: slab-out-of-bounds in run_unpack+0x84f/0xd00 fs/ntfs3/run.c:944 Read of size 1 at addr ffff888076db1900 by task syz-executor.3/14346 CPU: 1 PID: 14346 Comm: syz-executor.3 Not tainted 6.1.0-rc4-syzkaller-00045-g1767a722a708 #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+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 run_unpack+0x84f/0xd00 fs/ntfs3/run.c:944 run_unpack_ex+0xcc/0x870 fs/ntfs3/run.c:1057 ntfs_read_mft fs/ntfs3/inode.c:368 [inline] ntfs_iget5+0x1cfa/0x36f0 fs/ntfs3/inode.c:501 ntfs_fill_super+0x2f4c/0x42a0 fs/ntfs3/super.c:1095 get_tree_bdev+0x400/0x620 fs/super.c:1324 vfs_get_tree+0x88/0x270 fs/super.c:1531 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: 0033:0x7f159aa8cb6a 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:00007f159b785f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000bc0 RCX: 00007f159aa8cb6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f159b785fe0 RBP: 00007f159b786020 R08: 00007f159b786020 R09: 0000000020000000 R10: 0000000000000002 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f159b785fe0 R15: 0000000020003580 Allocated by task 2974: 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 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] uevent_show+0x163/0x310 drivers/base/core.c:2487 dev_attr_show+0x50/0xc0 drivers/base/core.c:2195 sysfs_kf_seq_show+0x324/0x4a0 fs/sysfs/file.c:59 seq_read_iter+0x43a/0xd30 fs/seq_file.c:230 call_read_iter include/linux/fs.h:2185 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_read+0x177/0x2a0 fs/read_write.c:613 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 2974: 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:511 ____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:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3674 uevent_show+0x1d5/0x310 drivers/base/core.c:2500 dev_attr_show+0x50/0xc0 drivers/base/core.c:2195 sysfs_kf_seq_show+0x324/0x4a0 fs/sysfs/file.c:59 seq_read_iter+0x43a/0xd30 fs/seq_file.c:230 call_read_iter include/linux/fs.h:2185 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_read+0x177/0x2a0 fs/read_write.c:613 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 ffff888076db0000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2304 bytes to the right of 4096-byte region [ffff888076db0000, ffff888076db1000) The buggy address belongs to the physical page: page:ffffea0001db6c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76db0 head:ffffea0001db6c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 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 3972, tgid 3972 (udevd), ts 352504907089, free_ts 352392839784 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4288 __alloc_pages+0x259/0x560 mm/page_alloc.c:5555 alloc_slab_page+0x70/0xf0 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc+0x9e/0x1a0 mm/slab_common.c:968 kmalloc include/linux/slab.h:558 [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+0x1f0/0x460 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1648 do_dentry_open+0x306/0x11b0 fs/open.c:869 do_open fs/namei.c:3557 [inline] path_openat+0x25fc/0x2df0 fs/namei.c:3713 do_filp_open+0x264/0x4f0 fs/namei.c:3740 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 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+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2586 put_cpu_partial+0x106/0x170 mm/slub.c:2662 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 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:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x1cc/0x300 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:679 [inline] locks_alloc_lock fs/locks.c:270 [inline] flock_lock_inode+0x2f9/0x1260 fs/locks.c:1023 flock_lock_inode_wait fs/locks.c:2033 [inline] locks_lock_inode_wait+0x10f/0x470 fs/locks.c:2060 locks_lock_file_wait include/linux/fs.h:1343 [inline] __do_sys_flock fs/locks.c:2130 [inline] __se_sys_flock+0x4ad/0x620 fs/locks.c:2084 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: ffff888076db1800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076db1880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888076db1900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888076db1980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076db1a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================