ebpf: fix big endian issue for s390x

Load the full 32 bits word and take the lower 16 bits, instead of reading just 16 bits. Same fix as containers/crun@07bae05 Signed-off-by: Alice Frosi <[email protected]>
opencontainers · May 4, 2020 · fdc170c · fdc170c
1 parent 9f6a2d4
commit fdc170c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/libcontainer/cgroups/ebpf/devicefilter/devicefilter.go b/libcontainer/cgroups/ebpf/devicefilter/devicefilter.go
@@ -49,7 +49,8 @@ func (p *program) init() {
 	*/
 	// R2 <- type (lower 16 bit of u32 access_type at R1[0])
 	p.insts = append(p.insts,
-		asm.LoadMem(asm.R2, asm.R1, 0, asm.Half))
+		asm.LoadMem(asm.R2, asm.R1, 0, asm.Word),
+		asm.And.Imm32(asm.R2, 0xFFFF))
 
 	// R3 <- access (upper 16 bit of u32 access_type at R1[0])
 	p.insts = append(p.insts,