• Shigeru Yoshida's avatar
    fs/ntfs3: Fix memory leak on ntfs_fill_super() error path · 51e76a23
    Shigeru Yoshida authored
    syzbot reported kmemleak as below:
    
    BUG: memory leak
    unreferenced object 0xffff8880122f1540 (size 32):
      comm "a.out", pid 6664, jiffies 4294939771 (age 25.500s)
      hex dump (first 32 bytes):
        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
        00 00 00 00 00 00 00 00 ed ff ed ff 00 00 00 00  ................
      backtrace:
        [<ffffffff81b16052>] ntfs_init_fs_context+0x22/0x1c0
        [<ffffffff8164aaa7>] alloc_fs_context+0x217/0x430
        [<ffffffff81626dd4>] path_mount+0x704/0x1080
        [<ffffffff81627e7c>] __x64_sys_mount+0x18c/0x1d0
        [<ffffffff84593e14>] do_syscall_64+0x34/0xb0
        [<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
    
    This patch fixes this issue by freeing mount options on error path of
    ntfs_fill_super().
    
    Reported-by: syzbot+9d67170b20e8f94351c8@syzkaller.appspotmail.com
    Signed-off-by: default avatarShigeru Yoshida <syoshida@redhat.com>
    Signed-off-by: default avatarKonstantin Komarov <almaz.alexandrovich@paragon-software.com>
    51e76a23
super.c 37 KB