On 6/15/22 08:26, Christian Göttsche wrote:
Use the new added capable_any function in appropriate cases, where a
task is required to have any of two capabilities.
Reorder CAP_SYS_ADMIN last.
Fixes: 94c4b4fd25e6 ("block: Check ADMIN before NICE for IOPRIO_CLASS_RT")
Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
---
v3:
rename to capable_any()
---
block/ioprio.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/block/ioprio.c b/block/ioprio.c
index 2fe068fcaad5..6441c052f837 100644
--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -37,14 +37,7 @@ int ioprio_check_cap(int ioprio)
switch (class) {
case IOPRIO_CLASS_RT:
- /*
- * Originally this only checked for CAP_SYS_ADMIN,
- * which was implicitly allowed for pid 0 by security
- * modules such as SELinux. Make sure we check
- * CAP_SYS_ADMIN first to avoid a denial/avc for
- * possibly missing CAP_SYS_NICE permission.
- */
- if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_NICE))
+ if (!capable_any(CAP_SYS_NICE, CAP_SYS_ADMIN))
return -EPERM;
fallthrough;
/* rt has prio field too */
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
