From: Vivek Goyal <vgoyal@redhat.com> To: linux-fsdevel@vger.kernel.org, selinux@vger.kernel.org, linux-security-module@vger.kernel.org, miklos@szeredi.hu Cc: virtio-fs@redhat.com, chirantan@chromium.org, vgoyal@redhat.com, stephen.smalley.work@gmail.com, dwalsh@redhat.com, casey@schaufler-ca.com, omosnace@redhat.com Subject: [PATCH v2 1/2] fuse: Add a flag FUSE_SECURITY_CTX Date: Tue, 12 Oct 2021 14:06:23 -0400 [thread overview] Message-ID: <20211012180624.447474-2-vgoyal@redhat.com> (raw) In-Reply-To: <20211012180624.447474-1-vgoyal@redhat.com> Add the FUSE_SECURITY_CTX flag for the `flags` field of the fuse_init_out struct. When this flag is set the kernel will append the security context for a newly created inode to the request (create, mkdir, mknod, and symlink). The server is responsible for ensuring that the inode appears atomically (preferrably) with the requested security context. For example, if the server is backed by a "real" linux file system then it can write the security context value to /proc/thread-self/attr/fscreate before making the syscall to create the inode. Vivek: This patch is slightly modified version of patch from Chirantan Ekbote <chirantan@chromium.org>. I made changes so that this patch applies to latest kernel. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> --- include/uapi/linux/fuse.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 36ed092227fa..2fe54c80051a 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -184,6 +184,10 @@ * * 7.34 * - add FUSE_SYNCFS + * + * 7.35 + * - add FUSE_SECURITY_CTX flag for fuse_init_out + * - add security context to create, mkdir, symlink, and mknod requests */ #ifndef _LINUX_FUSE_H @@ -219,7 +223,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 34 +#define FUSE_KERNEL_MINOR_VERSION 35 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -336,6 +340,8 @@ struct fuse_file_lock { * write/truncate sgid is killed only if file has group * execute permission. (Same as Linux VFS behavior). * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in + * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and + * mknod */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -367,6 +373,7 @@ struct fuse_file_lock { #define FUSE_SUBMOUNTS (1 << 27) #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) #define FUSE_SETXATTR_EXT (1 << 29) +#define FUSE_SECURITY_CTX (1 << 30) /** * CUSE INIT request/reply flags -- 2.31.1
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com> To: linux-fsdevel@vger.kernel.org, selinux@vger.kernel.org, linux-security-module@vger.kernel.org, miklos@szeredi.hu Cc: stephen.smalley.work@gmail.com, omosnace@redhat.com, virtio-fs@redhat.com, casey@schaufler-ca.com, vgoyal@redhat.com Subject: [Virtio-fs] [PATCH v2 1/2] fuse: Add a flag FUSE_SECURITY_CTX Date: Tue, 12 Oct 2021 14:06:23 -0400 [thread overview] Message-ID: <20211012180624.447474-2-vgoyal@redhat.com> (raw) In-Reply-To: <20211012180624.447474-1-vgoyal@redhat.com> Add the FUSE_SECURITY_CTX flag for the `flags` field of the fuse_init_out struct. When this flag is set the kernel will append the security context for a newly created inode to the request (create, mkdir, mknod, and symlink). The server is responsible for ensuring that the inode appears atomically (preferrably) with the requested security context. For example, if the server is backed by a "real" linux file system then it can write the security context value to /proc/thread-self/attr/fscreate before making the syscall to create the inode. Vivek: This patch is slightly modified version of patch from Chirantan Ekbote <chirantan@chromium.org>. I made changes so that this patch applies to latest kernel. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> --- include/uapi/linux/fuse.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 36ed092227fa..2fe54c80051a 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -184,6 +184,10 @@ * * 7.34 * - add FUSE_SYNCFS + * + * 7.35 + * - add FUSE_SECURITY_CTX flag for fuse_init_out + * - add security context to create, mkdir, symlink, and mknod requests */ #ifndef _LINUX_FUSE_H @@ -219,7 +223,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 34 +#define FUSE_KERNEL_MINOR_VERSION 35 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -336,6 +340,8 @@ struct fuse_file_lock { * write/truncate sgid is killed only if file has group * execute permission. (Same as Linux VFS behavior). * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in + * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and + * mknod */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -367,6 +373,7 @@ struct fuse_file_lock { #define FUSE_SUBMOUNTS (1 << 27) #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) #define FUSE_SETXATTR_EXT (1 << 29) +#define FUSE_SECURITY_CTX (1 << 30) /** * CUSE INIT request/reply flags -- 2.31.1
next prev parent reply other threads:[~2021-10-12 18:06 UTC|newest] Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-12 18:06 [PATCH v2 0/2] fuse: Send file/inode security context during creation Vivek Goyal 2021-10-12 18:06 ` [Virtio-fs] " Vivek Goyal 2021-10-12 18:06 ` Vivek Goyal [this message] 2021-10-12 18:06 ` [Virtio-fs] [PATCH v2 1/2] fuse: Add a flag FUSE_SECURITY_CTX Vivek Goyal 2021-10-12 19:09 ` Casey Schaufler 2021-10-12 19:09 ` [Virtio-fs] " Casey Schaufler 2021-10-12 20:38 ` Vivek Goyal 2021-10-12 20:38 ` [Virtio-fs] " Vivek Goyal 2021-10-12 18:06 ` [PATCH v2 2/2] fuse: Send security context of inode on file creation Vivek Goyal 2021-10-12 18:06 ` [Virtio-fs] " Vivek Goyal 2021-10-12 18:24 ` Casey Schaufler 2021-10-12 18:24 ` [Virtio-fs] " Casey Schaufler 2021-10-12 18:34 ` Vivek Goyal 2021-10-12 18:34 ` [Virtio-fs] " Vivek Goyal 2021-10-12 18:41 ` Casey Schaufler 2021-10-12 18:41 ` [Virtio-fs] " Casey Schaufler 2021-10-13 4:04 ` kernel test robot 2021-10-13 12:50 ` Vivek Goyal 2021-10-15 0:39 ` Chen, Rong A 2021-11-02 14:00 ` Miklos Szeredi 2021-11-02 14:00 ` [Virtio-fs] " Miklos Szeredi 2021-11-02 15:30 ` Vivek Goyal 2021-11-02 15:30 ` [Virtio-fs] " Vivek Goyal 2021-11-02 15:38 ` Miklos Szeredi 2021-11-02 15:38 ` [Virtio-fs] " Miklos Szeredi 2021-11-02 19:09 ` Vivek Goyal 2021-11-02 19:09 ` [Virtio-fs] " Vivek Goyal 2021-10-25 15:55 ` [PATCH v2 0/2] fuse: Send file/inode security context during creation Vivek Goyal 2021-10-25 15:55 ` [Virtio-fs] " Vivek Goyal
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