Signed-off-by: Cupertino Miranda <cupertino.miranda@xxxxxxxxxx>
Cc: Yonghong Song <yonghong.song@xxxxxxxxx>
Cc: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>
Cc: David Faust <david.faust@xxxxxxxxxx>
Cc: Jose Marchesi <jose.marchesi@xxxxxxxxxx
Cc: Elena Zannoni <elena.zannoni@xxxxxxxxxx>
---
.../selftests/bpf/progs/verifier_bounds.c | 99 +++++++++++++++++++
1 file changed, 99 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/verifier_bounds.c b/tools/testing/selftests/bpf/progs/verifier_bounds.c
index e3c867d48664..719e247114f5 100644
--- a/tools/testing/selftests/bpf/progs/verifier_bounds.c
+++ b/tools/testing/selftests/bpf/progs/verifier_bounds.c
@@ -949,6 +949,105 @@ l1_%=: r0 = 0; \
: __clobber_all);
}
+SEC("socket")
+__description("bounds check for reg32 <= 9, 3 mul (0,3)")
+__success __failure_unpriv
+__msg_unpriv("R0 min value is outside of the allowed memory range")
+__retval(0)
+__naked void reg32_3_mul_reg_01(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r6 = r0; \
+ r1 = 0; \
+ *(u64*)(r10 - 8) = r1; \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = %[map_hash_8b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 != 0 goto l0_%=; \
+ exit; \
+l0_%=: w1 = 3; \
+ r6 >>= 62; \
+ w1 *= w6; \
+ if w1 <= 9 goto l1_%=; \
+ r0 = *(u64*)(r0 + 8); \
+l1_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_8b),
+ __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("bounds check for reg32 <= 9, (0,3) mul 3")
+__success __failure_unpriv
+__msg_unpriv("R0 min value is outside of the allowed memory range")
+__retval(0)
+__naked void reg32_13_mul_reg_3(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r6 = r0; \
+ r1 = 0; \
+ *(u64*)(r10 - 8) = r1; \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = %[map_hash_8b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 != 0 goto l0_%=; \
+ exit; \
+l0_%=: w1 = 3; \
+ r6 >>= 62; \
+ w6 *= w1; \
+ if w6 <= 9 goto l1_%=; \
+ r0 = *(u64*)(r0 + 8); \
+l1_%=: r0 = 0; \
+ exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_8b),
+ __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("bounds check for reg32 >= 6 && reg32 <= 15, (2,5) mul 3")
+__success __failure_unpriv
+__msg_unpriv("R0 min value is outside of the allowed memory range")
+__retval(0)
+__naked void reg32_25_mul_reg_3(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r6 = r0; \
+ r1 = 0; \
+ *(u64*)(r10 - 8) = r1; \
+ r2 = r10; \
+ r2 += -8; \
+ r1 = %[map_hash_8b] ll; \
+ call %[bpf_map_lookup_elem]; \
+ if r0 != 0 goto l0_%=; \
+ exit; \
+l0_%=: w1 = 3; \
+ r6 >>= 62; \
+ r6 += 2; \
+ w6 *= w1; \
+ if w6 > 15 goto l1_%=; \
+ if w6 < 6 goto l1_%=; \
+ r0 = 0; \
+ exit; \
+l1_%=: r0 = *(u64*)(r0 + 8); \
+ exit; \
+" :
+ : __imm(bpf_map_lookup_elem),
+ __imm_addr(map_hash_8b),
+ __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
SEC("socket")
__description("bounds checks after 32-bit truncation. test 1")
__success __failure_unpriv __msg_unpriv("R0 leaks addr")
--
2.39.2
