linux-kernel - [tip: core/rseq] select: Convert to scoped user access

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <176224426478.2601451.18275304249360861483.tip-bot2@tip-bot2>
Date: Tue, 04 Nov 2025 08:17:44 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Ingo Molnar <mingo@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: core/rseq] select: Convert to scoped user access

The following commit has been merged into the core/rseq branch of tip:

Commit-ID:     3ce17e6909944b3f83b54915e36f5957f1327712
Gitweb:        https://git.kernel.org/tip/3ce17e6909944b3f83b54915e36f5957f1327712
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Mon, 27 Oct 2025 09:44:04 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 04 Nov 2025 08:28:34 +01:00

select: Convert to scoped user access

Replace the open coded implementation with the scoped user access guard.

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Link: https://patch.msgid.link/20251027083745.862419776@linutronix.de
---
 fs/select.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/fs/select.c b/fs/select.c
index 082cf60..65019b8 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -776,17 +776,13 @@ static inline int get_sigset_argpack(struct sigset_argpack *to,
 {
 	// the path is hot enough for overhead of copy_from_user() to matter
 	if (from) {
-		if (can_do_masked_user_access())
-			from = masked_user_access_begin(from);
-		else if (!user_read_access_begin(from, sizeof(*from)))
-			return -EFAULT;
-		unsafe_get_user(to->p, &from->p, Efault);
-		unsafe_get_user(to->size, &from->size, Efault);
-		user_read_access_end();
+		scoped_user_read_access(from, Efault) {
+			unsafe_get_user(to->p, &from->p, Efault);
+			unsafe_get_user(to->size, &from->size, Efault);
+		}
 	}
 	return 0;
 Efault:
-	user_read_access_end();
 	return -EFAULT;
 }