KASAN: use-after-free Read in ntfs

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: use-after-free Read in ntfs_iget	C		done	2	1369d	1445d	1/1	fixed on 2021/03/23 15:18
linux-4.19	KASAN: use-after-free Read in ntfs_iget	C		done	1	1365d	1425d	1/1	fixed on 2021/03/29 19:17
upstream	KASAN: use-after-free Read in ntfs_iget ntfs3	C	error	error	1	1458d	1454d	20/28	fixed on 2021/04/09 19:46
upstream	KASAN: use-after-free Read in ntfs_iget (2) ntfs3	C	inconclusive		2	1266d	1262d	20/28	fixed on 2021/11/10 00:50

================================================================== BUG: KASAN: use-after-free in ntfs_is_extended_system_file fs/ntfs/inode.c:509 [inline] BUG: KASAN: use-after-free in ntfs_read_locked_inode+0x5268/0x56f0 fs/ntfs/inode.c:1048 Read of size 8 at addr ffff88808cfc5db8 by task syz-executor175/8194 CPU: 1 PID: 8194 Comm: syz-executor175 Not tainted 4.19.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 ntfs_is_extended_system_file fs/ntfs/inode.c:509 [inline] ntfs_read_locked_inode+0x5268/0x56f0 fs/ntfs/inode.c:1048 ntfs_iget+0x12d/0x180 fs/ntfs/inode.c:190 load_and_init_upcase fs/ntfs/super.c:1669 [inline] load_system_files fs/ntfs/super.c:1824 [inline] ntfs_fill_super+0xcd3/0x7e10 fs/ntfs/super.c:2908 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44876a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcc012e498 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffcc012e4f0 RCX: 000000000044876a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcc012e4b0 RBP: 00007ffcc012e4b0 R08: 00007ffcc012e4f0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020001fa0 R13: 0000000000000003 R14: 0000000000000004 R15: 000000000000013c The buggy address belongs to the page: page:ffffea000233f140 count:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea00023a4248 ffffea00023a0848 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808cfc5c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808cfc5d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88808cfc5d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808cfc5e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808cfc5e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================