linux-kernel - [PATCH Next] copy_process(): Fixed jump logic error

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Message-ID: <tencent_5E4F978D9525A58D97925ADDBADDB2193107@qq.com>
Date: Wed, 24 Sep 2025 20:06:21 +0800
From: Edward Adam Davis <eadavis@...com>
To: kees@...nel.org
Cc: mingo@...hat.com,
	peterz@...radead.org,
	juri.lelli@...hat.com,
	vincent.guittot@...aro.org,
	dietmar.eggemann@....com,
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	vschneid@...hat.com,
	akpm@...ux-foundation.org,
	david@...hat.com,
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	rppt@...nel.org,
	surenb@...gle.com,
	mhocko@...e.com,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH Next] copy_process(): Fixed jump logic error

After futex_hash_allocate_default() fails, the logic should jump to
bad_fork_cancel_cgroup, not bad_fork_core_free.

Jumping to bad_fork_core_free would cause a siglock imbalance.

Signed-off-by: Edward Adam Davis <eadavis@...com>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index e9a7fb5c3e49..a0b8eeeb1d27 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2349,7 +2349,7 @@ __latent_entropy struct task_struct *copy_process(
 	if (need_futex_hash_allocate_default(clone_flags)) {
 		retval = futex_hash_allocate_default();
 		if (retval)
-			goto bad_fork_core_free;
+			goto bad_fork_cancel_cgroup;
 		/*
 		 * If we fail beyond this point we don't free the allocated
 		 * futex hash map. We assume that another thread will be created
-- 
2.43.0