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ntsync: reject wait ioctls with zero owner

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setup_wait() already validates pad and flags but not owner, while
Documentation/userspace-api/ntsync.rst requires EINVAL when owner is
zero. Reject early before queueing waiters.

Signed-off-by: Iván Ezequiel Rodriguez <ivanrwcm25@gmail.com>
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Reviewed-by: Elizabeth Figura <zfigura@codeweavers.com>
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://patch.msgid.link/20260723201301.11826-4-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Iván Ezequiel Rodriguez
2026-07-31 14:15:54 +02:00
committed by Greg Kroah-Hartman
parent 1d076f7524
commit 61611481f7
1 changed files with 3 additions and 0 deletions
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drivers/misc/ntsync.c
+3
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@@ -875,6 +875,9 @@ static int setup_wait(struct ntsync_device *dev,
if (args->pad || (args->flags & ~NTSYNC_WAIT_REALTIME))
return -EINVAL;
if (!args->owner)
return -EINVAL;
if (size >= sizeof(fds))
return -EINVAL;