From nobody Mon Feb 9 11:28:42 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 25D7C18B47D; Tue, 28 Oct 2025 08:46:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641178; cv=none; b=H0QndVqnIP6QeK8L2vRlx0KV4VLKX9OrVyt1U3t/qQNsJESWKvGfzBDE0A9loLnLdV5cYFU2qfIJk9R+20OxPI7KitM8SnmcxxHEnGGoKfVfaq7SgLHdx9uaOZYfkTlGASB2mPgLXDb+LCUjFF9trbQ4CYWJdYwfBZMUEeWvbhA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641178; c=relaxed/simple; bh=xLaA3mHVs1PMWvjVhO98eDYbhDOhetr0dEi8bwXPzZc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=BTBApQ7Ayb4E5Z/oTXcu85r9KjW65YyO85e4mY5kbHFYTpjqKNzLue+OCjb7nf6C/eiXj/tkD4vFwCGGJZLQZFTmt5Hn9pm66ZWmPX7x9r0ITWSqlYO+lcHZjU+2Y6ccC7FhlZyrTHeZNVdLb1BHxlrCDjGuCurUZboR6gZJDB8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Mk7DvoA6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Mk7DvoA6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 332C3C4CEE7; Tue, 28 Oct 2025 08:46:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761641177; bh=xLaA3mHVs1PMWvjVhO98eDYbhDOhetr0dEi8bwXPzZc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Mk7DvoA6EhCNm1jFYTvCH3G5KY7t1ywC9Vd7qKgNddwPRDmdZZUZz8CobWfys8fee ifnwRDEed7xhcCaBxqeSQqLjLPWRMwd6dm4sd8oIEplhzvn0HnOje6Vumb9ZEN/qbq LvcVIgcpBwVa+4GaQ/O/Mxn7E4rrNJjDkXvIr4FPcH/w3Ug7cWWKeWwr4Af9UvCmu4 Fyedkf7nEkuZHg8cf6qWBxxNE7zgb4titNMig9fU1HfFrmY5L5wxHbPTJC4wUNdSEU qPvGELV82guJrt8bkYdoelNTHMasMAnjHPdSYRhOYukAd/SBJWPw+6++jNu2UNJH1L nLpWacEvINoyw== From: Christian Brauner Date: Tue, 28 Oct 2025 09:45:49 +0100 Subject: [PATCH 04/22] pidfs: add missing BUILD_BUG_ON() assert on struct pidfd_info Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251028-work-coredump-signal-v1-4-ca449b7b7aa0@kernel.org> References: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> In-Reply-To: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Oleg Nesterov , Amir Goldstein , Aleksa Sarai , Yu Watanabe , Josef Bacik , Jeff Layton , Jann Horn , Luca Boccassi , Alexander Mikhalitsyn , linux-kernel@vger.kernel.org, Alexander Viro , Jan Kara , Lennart Poettering , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=667; i=brauner@kernel.org; h=from:subject:message-id; bh=xLaA3mHVs1PMWvjVhO98eDYbhDOhetr0dEi8bwXPzZc=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQyNB2s68rPfbujfu9VE8Ee8dZr86cmb900/dFsxhXBL ZNmO+Vf7ShlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZjIJB+GPxxcybprV7BIZqqv WSORN/Pf0p9ruFW13ylypZvr7+pWqGD4pya0d8biZzvsvgm43g3QSOHM2Vr+yvLuWQ9njYZW3k/ LmAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Validate that the size of struct pidfd_info is correctly updated. Fixes: 1d8db6fd698d ("pidfs, coredump: add PIDFD_INFO_COREDUMP") Signed-off-by: Christian Brauner Reviewed-by: Alexander Mikhalitsyn --- fs/pidfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/pidfs.c b/fs/pidfs.c index c0f410903c3f..7e4d90cc74ff 100644 --- a/fs/pidfs.c +++ b/fs/pidfs.c @@ -306,6 +306,8 @@ static long pidfd_info(struct file *file, unsigned int = cmd, unsigned long arg) const struct cred *c; __u64 mask; =20 + BUILD_BUG_ON(sizeof(struct pidfd_info) !=3D PIDFD_INFO_SIZE_VER1); + if (!uinfo) return -EINVAL; if (usize < PIDFD_INFO_SIZE_VER0) --=20 2.47.3