linux-kernel - [PATCH] unwind: Fix signedness bug in unwind_deferred

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Message-ID: <aR17gxtrzOJnVNFq@stanley.mountain>
Date: Wed, 19 Nov 2025 11:10:43 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH] unwind: Fix signedness bug in unwind_deferred_request()

The "bit" value comes from "work->bit".  It is set to -1 if we cancel
the work in unwind_deferred_cancel().  It needs to be signed because
we check for negative values.  Change the type from unsigned long to int.

Fixes: 357eda2d7450 ("unwind deferred: Use SRCU unwind_deferred_task_work()")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 kernel/unwind/deferred.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/unwind/deferred.c b/kernel/unwind/deferred.c
index a88fb481c4a3..8dc11e0d9374 100644
--- a/kernel/unwind/deferred.c
+++ b/kernel/unwind/deferred.c
@@ -232,8 +232,7 @@ int unwind_deferred_request(struct unwind_work *work, u64 *cookie)
 	struct unwind_task_info *info = &current->unwind_info;
 	int twa_mode = TWA_RESUME;
 	unsigned long old, bits;
-	unsigned long bit;
-	int ret;
+	int bit, ret;
 
 	*cookie = 0;
 
-- 
2.51.0