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[109.92.26.237]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442ed666dc7sm12345655e9.18.2025.05.13.02.18.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 May 2025 02:18:17 -0700 (PDT) From: Andrey Albershteyn X-Google-Original-From: Andrey Albershteyn Date: Tue, 13 May 2025 11:17:56 +0200 Subject: [PATCH v5 3/7] selinux: implement inode_file_[g|s]etattr hooks Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250513-xattrat-syscall-v5-3-22bb9c6c767f@kernel.org> References: <20250513-xattrat-syscall-v5-0-22bb9c6c767f@kernel.org> In-Reply-To: <20250513-xattrat-syscall-v5-0-22bb9c6c767f@kernel.org> To: Richard Henderson , Matt Turner , Russell King , Catalin Marinas , Will Deacon , Geert Uytterhoeven , Michal Simek , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , "David S. Miller" , Andreas Larsson , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chris Zankel , Max Filippov , Alexander Viro , Christian Brauner , Jan Kara , =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , =?utf-8?q?G=C3=BCnther_Noack?= , Arnd Bergmann , =?utf-8?q?Pali_Roh=C3=A1r?= , Paul Moore , James Morris , "Serge E. Hallyn" , Stephen Smalley , Ondrej Mosnacek , Tyler Hicks , Miklos Szeredi , Amir Goldstein Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, linux-api@vger.kernel.org, linux-arch@vger.kernel.org, selinux@vger.kernel.org, ecryptfs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, Andrey Albershteyn X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1670; i=aalbersh@kernel.org; h=from:subject:message-id; bh=wSzH0WcqWhiy63ekDcp2P+4tMQ4i2gTZHqE6rCKQ++I=; b=owJ4nJvAy8zAJea2/JXEGuOHHIyn1ZIYMpT5vOcHL6x//4Yt+9EFwZyLxr/7Tz9ZpP5u3tO4V q6ORSUh1y53lLIwiHExyIopsqyT1pqaVCSVf8SgRh5mDisTyBAGLk4BmEiwPiND+6YnluEhu/Qc Cx5cnc3R+vvvJvuQL0V6fGyyUclCHH6VjAwT/JZona0OZVzwJvX/wlkFTstmX7ezC/yqzlmc01k tfZMVAGD5RU0= X-Developer-Key: i=aalbersh@kernel.org; a=openpgp; fpr=AE1B2A9562721A6FC4307C1F46A7EA18AC33E108 These hooks are called on inode extended attribute retrieval/change. Cc: selinux@vger.kernel.org Cc: Paul Moore Signed-off-by: Andrey Albershteyn --- security/selinux/hooks.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index e7a7dcab81db6a8735877eeb911975e06a9de688..9c6e264b090f9038d6848546760860bfe74b7341 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3366,6 +3366,18 @@ static int selinux_inode_removexattr(struct mnt_idmap *idmap, return -EACCES; } +static int selinux_inode_file_setattr(struct dentry *dentry, + struct fileattr *fa) +{ + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + +static int selinux_inode_file_getattr(struct dentry *dentry, + struct fileattr *fa) +{ + return dentry_has_perm(current_cred(), dentry, FILE__GETATTR); +} + static int selinux_path_notify(const struct path *path, u64 mask, unsigned int obj_type) { @@ -7272,6 +7284,8 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(inode_getxattr, selinux_inode_getxattr), LSM_HOOK_INIT(inode_listxattr, selinux_inode_listxattr), LSM_HOOK_INIT(inode_removexattr, selinux_inode_removexattr), + LSM_HOOK_INIT(inode_file_getattr, selinux_inode_file_getattr), + LSM_HOOK_INIT(inode_file_setattr, selinux_inode_file_setattr), LSM_HOOK_INIT(inode_set_acl, selinux_inode_set_acl), LSM_HOOK_INIT(inode_get_acl, selinux_inode_get_acl), LSM_HOOK_INIT(inode_remove_acl, selinux_inode_remove_acl), -- 2.47.2