From: Paul Moore <paul@paul-moore.com>
Date: Fri, 29 May 2026 15:24:37 +0000 (-0400)
Subject: selinux: revert use of __getname() in selinux_genfs_get_sid()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=033182baeab63ce96a6eb8aef1a6cd444fcf9519;p=thirdparty%2Fkernel%2Flinux.git

selinux: revert use of __getname() in selinux_genfs_get_sid()

Revert commit 54067bacb49c ("selinux: hooks: use __getname() to allocate
path buffer") as it improperly assumed that PATH_MAX == PAGE_SIZE
everywhere.  Moving away from __get_free_page() is still a good thing and
will be revisited in the future.

Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
---

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 95d0fb20d84ec..97801966bf32c 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1336,7 +1336,7 @@ static int selinux_genfs_get_sid(struct dentry *dentry,
 	struct super_block *sb = dentry->d_sb;
 	char *buffer, *path;
 
-	buffer = __getname();
+	buffer = (char *)__get_free_page(GFP_KERNEL);
 	if (!buffer)
 		return -ENOMEM;
 
@@ -1361,7 +1361,7 @@ static int selinux_genfs_get_sid(struct dentry *dentry,
 			rc = 0;
 		}
 	}
-	__putname(buffer);
+	free_page((unsigned long)buffer);
 	return rc;
 }