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tty/vt: consolemap: check put_user() in con_get_unimap()

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Only the return value of copy_to_user() is checked in con_get_unimap().
Do the same for put_user() of the count too.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220607104946.18710-16-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2022-06-07 12:49:26 +02:00 committed by Greg Kroah-Hartman
parent cb47d81f0f
commit 949fafcd7f
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/vt/consolemap.c
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@ -813,7 +813,8 @@ unlock:
console_unlock(); console_unlock();
if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist))) if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist)))
ret = -EFAULT; ret = -EFAULT;
put_user(ect, uct); if (put_user(ect, uct))
ret = -EFAULT;
kvfree(unilist); kvfree(unilist);
return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
} }