diff mbox series

[bpf,v1,2/2] selftests/bpf: Add regression test for pruning fix

Message ID 20220823185500.467-1-memxor@gmail.com (mailing list archive)
State Accepted
Commit 1800b2ac96d8bc4ccdddc2ea9e83ecaffd54d3f2
Delegated to: BPF
Headers show
Series Fix incorrect pruning for ARG_CONST_ALLOC_SIZE_OR_ZERO | expand

Checks

Context Check Description
bpf/vmtest-bpf-PR success PR summary
netdev/tree_selection success Clearly marked for bpf
netdev/fixes_present success Fixes tag present in non-next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 15 maintainers not CCed: shuah@kernel.org john.fastabend@gmail.com linux-kselftest@vger.kernel.org jolsa@kernel.org song@kernel.org yhs@fb.com netdev@vger.kernel.org haoluo@google.com kuba@kernel.org martin.lau@linux.dev mykolal@fb.com kpsingh@kernel.org hawk@kernel.org davem@davemloft.net sdf@google.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 91 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-VM_Test-4 success Logs for llvm-toolchain
bpf/vmtest-bpf-VM_Test-5 success Logs for set-matrix
bpf/vmtest-bpf-VM_Test-2 success Logs for build for x86_64 with gcc
bpf/vmtest-bpf-VM_Test-3 success Logs for build for x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-1 success Logs for build for s390x with gcc
bpf/vmtest-bpf-VM_Test-7 success Logs for test_maps on x86_64 with gcc
bpf/vmtest-bpf-VM_Test-8 success Logs for test_maps on x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-16 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-VM_Test-17 success Logs for test_verifier on x86_64 with llvm-16
bpf/vmtest-bpf-VM_Test-10 success Logs for test_progs on x86_64 with gcc
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bpf/vmtest-bpf-VM_Test-14 success Logs for test_progs_no_alu32 on x86_64 with llvm-16
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bpf/vmtest-bpf-VM_Test-15 success Logs for test_verifier on s390x with gcc

Commit Message

Kumar Kartikeya Dwivedi Aug. 23, 2022, 6:55 p.m. UTC 
Add a test to ensure we do mark_chain_precision for the argument type
ARG_CONST_ALLOC_SIZE_OR_ZERO. For other argument types, this was already
done, but propagation for missing for this case. Without the fix, this
test case loads successfully.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
 .../testing/selftests/bpf/verifier/precise.c  | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/verifier/precise.c b/tools/testing/selftests/bpf/verifier/precise.c
index 9e754423fa8b..6c03a7d805f9 100644
--- a/tools/testing/selftests/bpf/verifier/precise.c
+++ b/tools/testing/selftests/bpf/verifier/precise.c
@@ -192,3 +192,28 @@ 
 	.result = VERBOSE_ACCEPT,
 	.retval = -1,
 },
+{
+	"precise: mark_chain_precision for ARG_CONST_ALLOC_SIZE_OR_ZERO",
+	.insns = {
+	BPF_LDX_MEM(BPF_W, BPF_REG_4, BPF_REG_1, offsetof(struct xdp_md, ingress_ifindex)),
+	BPF_LD_MAP_FD(BPF_REG_6, 0),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
+	BPF_MOV64_IMM(BPF_REG_2, 1),
+	BPF_MOV64_IMM(BPF_REG_3, 0),
+	BPF_JMP_IMM(BPF_JEQ, BPF_REG_4, 0, 1),
+	BPF_MOV64_IMM(BPF_REG_2, 0x1000),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve),
+	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
+	BPF_EXIT_INSN(),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+	BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 42),
+	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_submit),
+	BPF_MOV64_IMM(BPF_REG_0, 0),
+	BPF_EXIT_INSN(),
+	},
+	.fixup_map_ringbuf = { 1 },
+	.prog_type = BPF_PROG_TYPE_XDP,
+	.flags = BPF_F_TEST_STATE_FREQ,
+	.errstr = "invalid access to memory, mem_size=1 off=42 size=8",
+	.result = REJECT,
+},