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Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_movsx.c')
-rw-r--r--tools/testing/selftests/bpf/progs/verifier_movsx.c354
1 files changed, 354 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_movsx.c b/tools/testing/selftests/bpf/progs/verifier_movsx.c
new file mode 100644
index 000000000000..a4d8814eb5ed
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_movsx.c
@@ -0,0 +1,354 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \
+ (defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \
+ defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \
+ defined(__TARGET_ARCH_loongarch)) && \
+ __clang_major__ >= 18
+
+SEC("socket")
+__description("MOV32SX, S8")
+__success __success_unpriv __retval(0x23)
+__naked void mov32sx_s8(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s8)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16")
+__success __success_unpriv __retval(0xFFFFff23)
+__naked void mov32sx_s16(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s16)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8")
+__success __success_unpriv __retval(-2)
+__naked void mov64sx_s8(void)
+{
+ asm volatile (" \
+ r0 = 0x1fe; \
+ r0 = (s8)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16")
+__success __success_unpriv __retval(0xf23)
+__naked void mov64sx_s16(void)
+{
+ asm volatile (" \
+ r0 = 0xf0f23; \
+ r0 = (s16)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32")
+__success __success_unpriv __retval(-1)
+__naked void mov64sx_s32(void)
+{
+ asm volatile (" \
+ r0 = 0xfffffffe; \
+ r0 = (s32)r0; \
+ r0 >>= 1; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s8_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ w1 = (s8)w0; \
+ /* w1 with s8 range */ \
+ if w1 s> 0x7f goto l0_%=; \
+ if w1 s< -0x80 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ w1 = (s16)w0; \
+ /* w1 with s16 range */ \
+ if w1 s> 0x7fff goto l0_%=; \
+ if w1 s< -0x80ff goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check 2")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range_2(void)
+{
+ asm volatile (" \
+ r1 = 65535; \
+ w2 = (s16)w1; \
+ r2 >>= 1; \
+ if r2 != 0x7fffFFFF goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 0; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s8_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s8)r0; \
+ /* r1 with s8 range */ \
+ if r1 s> 0x7f goto l0_%=; \
+ if r1 s< -0x80 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s16_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s16)r0; \
+ /* r1 with s16 range */ \
+ if r1 s> 0x7fff goto l0_%=; \
+ if r1 s< -0x8000 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s32_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s32)r0; \
+ /* r1 with s32 range */ \
+ if r1 s> 0x7fffffff goto l0_%=; \
+ if r1 s< -0x80000000 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16, R10 Sign Extension")
+__failure __msg("R1 type=scalar expected=fp, pkt, pkt_meta, map_key, map_value, mem, ringbuf_mem, buf, trusted_ptr_")
+__failure_unpriv __msg_unpriv("R10 sign-extension part of pointer")
+__naked void mov64sx_s16_r10(void)
+{
+ asm volatile (" \
+ r1 = 553656332; \
+ *(u32 *)(r10 - 8) = r1; \
+ r1 = (s16)r10; \
+ r1 += -8; \
+ r2 = 3; \
+ if r2 <= r1 goto l0_%=; \
+l0_%=: \
+ call %[bpf_trace_printk]; \
+ r0 = 0; \
+ exit; \
+" :
+ : __imm(bpf_trace_printk)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, var_off u32_max")
+__failure __msg("infinite loop detected")
+__failure_unpriv __msg_unpriv("back-edge from insn 2 to 0")
+__naked void mov64sx_s32_varoff_1(void)
+{
+ asm volatile (" \
+l0_%=: \
+ r3 = *(u8 *)(r10 -387); \
+ w7 = (s8)w3; \
+ if w7 >= 0x2533823b goto l0_%=; \
+ w0 = 0; \
+ exit; \
+" :
+ :
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, var_off not u32_max, positive after s8 extension")
+__success __retval(0)
+__success_unpriv
+#ifdef SPEC_V1
+__xlated_unpriv("w0 = 0")
+__xlated_unpriv("exit")
+__xlated_unpriv("nospec") /* inserted to prevent `frame pointer is read only` */
+__xlated_unpriv("goto pc-1")
+#endif
+__naked void mov64sx_s32_varoff_2(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r3 = r0; \
+ r3 &= 0xf; \
+ w7 = (s8)w3; \
+ if w7 s>= 16 goto l0_%=; \
+ w0 = 0; \
+ exit; \
+l0_%=: \
+ r10 = 1; \
+ exit; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, var_off not u32_max, negative after s8 extension")
+__success __retval(0)
+__success_unpriv
+#ifdef SPEC_V1
+__xlated_unpriv("w0 = 0")
+__xlated_unpriv("exit")
+__xlated_unpriv("nospec") /* inserted to prevent `frame pointer is read only` */
+__xlated_unpriv("goto pc-1")
+#endif
+__naked void mov64sx_s32_varoff_3(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r3 = r0; \
+ r3 &= 0xf; \
+ r3 |= 0x80; \
+ w7 = (s8)w3; \
+ if w7 s>= -5 goto l0_%=; \
+ w0 = 0; \
+ exit; \
+l0_%=: \
+ r10 = 1; \
+ exit; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8, unsigned range_check")
+__success __retval(0)
+__naked void mov64sx_s8_range_check(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r0 &= 0x1; \
+ r0 += 0xfe; \
+ r0 = (s8)r0; \
+ if r0 < 0xfffffffffffffffe goto label_%=; \
+ r0 = 0; \
+ exit; \
+label_%=: \
+ exit; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, unsigned range_check")
+__success __retval(0)
+__naked void mov32sx_s8_range_check(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ w0 &= 0x1; \
+ w0 += 0xfe; \
+ w0 = (s8)w0; \
+ if w0 < 0xfffffffe goto label_%=; \
+ r0 = 0; \
+ exit; \
+label_%=: \
+ exit; \
+ " :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+ return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";
generated by cgit (git 2.34.1) at 2025-12-27 08:03:34 +0000