linux-kernel - [PATCH 01/22] pidfs: use guard() for task

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Message-Id: <20251028-work-coredump-signal-v1-1-ca449b7b7aa0@kernel.org>
Date: Tue, 28 Oct 2025 09:45:46 +0100
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org
Cc: Oleg Nesterov <oleg@...hat.com>, Amir Goldstein <amir73il@...il.com>, 
 Aleksa Sarai <cyphar@...har.com>, 
 Yu Watanabe <watanabe.yu+github@...il.com>, 
 Josef Bacik <josef@...icpanda.com>, Jeff Layton <jlayton@...nel.org>, 
 Jann Horn <jannh@...gle.com>, Luca Boccassi <luca.boccassi@...il.com>, 
 Alexander Mikhalitsyn <alexander@...alicyn.com>, 
 linux-kernel@...r.kernel.org, Alexander Viro <viro@...iv.linux.org.uk>, 
 Jan Kara <jack@...e.cz>, Lennart Poettering <lennart@...ttering.net>, 
 Mike Yuan <me@...dnzj.com>, 
 Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH 01/22] pidfs: use guard() for task_lock

Use a guard().

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 fs/pidfs.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/pidfs.c b/fs/pidfs.c
index 0ef5b47d796a..c2f0b7091cd7 100644
--- a/fs/pidfs.c
+++ b/fs/pidfs.c
@@ -356,13 +356,12 @@ static long pidfd_info(struct file *file, unsigned int cmd, unsigned long arg)
 		return -ESRCH;
 
 	if ((kinfo.mask & PIDFD_INFO_COREDUMP) && !(kinfo.coredump_mask)) {
-		task_lock(task);
+		guard(task_lock)(task);
 		if (task->mm) {
 			unsigned long flags = __mm_flags_get_dumpable(task->mm);
 
 			kinfo.coredump_mask = pidfs_coredump_mask(flags);
 		}
-		task_unlock(task);
 	}
 
 	/* Unconditionally return identifiers and credentials, the rest only on request */

-- 
2.47.3