In the Linux kernel, the following vulnerability has been resolved:EOL][EOL]fs/ntfs3: Fix NULL deref in ntfs_update_mftmirr[EOL][EOL]If ntfs_fill_super() wasn't called then sbi->sb will be equal to NULL.[EOL]Code should check this ptr before dereferencing. Syzbot hit this issue[EOL]via passing wrong mount param as can be seen from log below[EOL][EOL]Fail log:[EOL]ntfs3: Unknown parameter 'iochvrset'[EOL]general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN[EOL]KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f][EOL]CPU: 1 PID: 3589 Comm: syz-executor210 Not tainted 5.18.0-rc3-syzkaller-00016-gb253435746d9 #0[EOL]...[EOL]Call Trace:[EOL] <TASK>[EOL] put_ntfs+0x1ed/0x2a0 fs/ntfs3/super.c:463[EOL] ntfs_fs_free+0x6a/0xe0 fs/ntfs3/super.c:1363[EOL] put_fs_context+0x119/0x7a0 fs/fs_context.c:469[EOL] do_new_mount+0x2b4/0xad0 fs/namespace.c:3044[EOL] do_mount fs/namespace.c:3383 [inline][EOL] __do_sys_mount fs/namespace.c:3591 [inline] CREATE(Triage):(User=lchen-cn) [CVE-2022-50057 (https://nvd.nist.gov/vuln/detail/CVE-2022-50057)
