On 1/2/24 11:30 AM, Ilya Leoshkevich wrote:
Test gotol with offsets that don't fit into a short (i.e., larger than
32k or smaller than -32k).
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
It might be useful to explain why the test will fail
with unpriv mode (4K insn limit) just in case that
people are not aware of the reason.
Acked-by: Yonghong Song <yonghong.song@xxxxxxxxx>
---
.../selftests/bpf/progs/verifier_gotol.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/tools/testing/selftests/bpf/progs/verifier_gotol.c b/tools/testing/selftests/bpf/progs/verifier_gotol.c
index d1edbcff9a18..05a329ee45ee 100644
--- a/tools/testing/selftests/bpf/progs/verifier_gotol.c
+++ b/tools/testing/selftests/bpf/progs/verifier_gotol.c
@@ -33,6 +33,25 @@ l3_%=: \
: __clobber_all);
}
+SEC("socket")
+__description("gotol, large_imm")
+__success __failure_unpriv __retval(40000)
+__naked void gotol_large_imm(void)
+{
+ asm volatile (" \
+ gotol 1f; \
+0: \
+ r0 = 0; \
+ .rept 40000; \
+ r0 += 1; \
+ .endr; \
+ exit; \
+1: gotol 0b; \
+" :
+ :
+ : __clobber_all);
+}
+
#else
SEC("socket")
