diff mbox series

[RFC,v2,06/14] block: Switch from devcgroup_check_permission to security hook

Message ID 20231018105033.13669-7-michael.weiss@aisec.fraunhofer.de (mailing list archive)
State Superseded
Headers show
Series device_cgroup: guard mknod for non-initial user namespace | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR success PR summary
bpf/vmtest-bpf-next-VM_Test-0 success Logs for ShellCheck
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1365 this patch: 1365
netdev/cc_maintainers fail 2 maintainers not CCed: axboe@kernel.dk linux-block@vger.kernel.org
netdev/build_clang success Errors and warnings before: 1389 this patch: 1389
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1390 this patch: 1390
netdev/checkpatch warning CHECK: Alignment should match open parenthesis
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Michael Weiß Oct. 18, 2023, 10:50 a.m. UTC 
The new lsm-based cgroup device access control provides an
equivalent hook to check device permission. Thus, switch to the
more generic security hook security_dev_permission() instead of
directly calling devcgroup_check_permission().

Signed-off-by: Michael Weiß <michael.weiss@aisec.fraunhofer.de>
---
 block/bdev.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/block/bdev.c b/block/bdev.c
index f3b13aa1b7d4..fc6de4e2a80b 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -10,7 +10,6 @@ 
 #include <linux/slab.h>
 #include <linux/kmod.h>
 #include <linux/major.h>
-#include <linux/device_cgroup.h>
 #include <linux/blkdev.h>
 #include <linux/blk-integrity.h>
 #include <linux/backing-dev.h>
@@ -27,6 +26,7 @@ 
 #include <linux/part_stat.h>
 #include <linux/uaccess.h>
 #include <linux/stat.h>
+#include <linux/security.h>
 #include "../fs/internal.h"
 #include "blk.h"
 
@@ -757,10 +757,9 @@  struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
 	struct gendisk *disk;
 	int ret;
 
-	ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
-			MAJOR(dev), MINOR(dev),
-			((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
-			((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
+	ret = security_dev_permission(S_IFBLK, dev,
+			((mode & BLK_OPEN_READ) ? MAY_READ : 0) |
+			((mode & BLK_OPEN_WRITE) ? MAY_WRITE : 0));
 	if (ret)
 		return ERR_PTR(ret);