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| author | Jiri Slaby <jslaby@suse.cz> | 2022-06-07 12:49:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-10 13:37:02 +0200 |
| commit | 949fafcd7fa310e68bfd8828304150cdc9de5629 (patch) | |
| tree | f44244c43d803fa162d767630d7df4db65c63bb5 /drivers/tty/vt | |
| parent | cb47d81f0f0fa293e18fe8828715a6509f480b3f (diff) | |
| download | linux-949fafcd7fa310e68bfd8828304150cdc9de5629.tar.bz2 | |
tty/vt: consolemap: check put_user() in con_get_unimap()
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>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/consolemap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c index 831450f2bfd1..92b5dddb00d9 100644 --- a/drivers/tty/vt/consolemap.c +++ b/drivers/tty/vt/consolemap.c @@ -813,7 +813,8 @@ unlock: console_unlock(); if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist))) ret = -EFAULT; - put_user(ect, uct); + if (put_user(ect, uct)) + ret = -EFAULT; kvfree(unilist); return ret ? ret : (ect <= ct) ? 0 : -ENOMEM; } |