diff mbox series

[bpf-next,v3,3/3] bpf: Adapt and add tests for detecting jump to reserved code

Message ID 20231011-jmp-into-reserved-fields-v3-3-97d2aa979788@gmail.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf: Detect jumping to reserved code of ld_imm64 | expand

Checks

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netdev/series_format success Posting correctly formatted
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netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/cc_maintainers warning 3 maintainers not CCed: shuah@kernel.org mykolal@fb.com linux-kselftest@vger.kernel.org
netdev/build_clang success Errors and warnings before: 9 this patch: 9
netdev/verify_signedoff success Signed-off-by tag matches author and committer
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netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
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Commit Message

Hao Sun Oct. 11, 2023, 9 a.m. UTC 
Adapt errstr of existing tests to make them pass, and add a new case
to test backward jump to reserved code.

Signed-off-by: Hao Sun <sunhao.th@gmail.com>
---
 tools/testing/selftests/bpf/verifier/ld_imm64.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/verifier/ld_imm64.c b/tools/testing/selftests/bpf/verifier/ld_imm64.c
index f9297900cea6..aa3ada0062d9 100644
--- a/tools/testing/selftests/bpf/verifier/ld_imm64.c
+++ b/tools/testing/selftests/bpf/verifier/ld_imm64.c
@@ -9,8 +9,7 @@ 
 	BPF_MOV64_IMM(BPF_REG_0, 2),
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "invalid BPF_LD_IMM insn",
-	.errstr_unpriv = "R1 pointer comparison",
+	.errstr = "jump to reserved code",
 	.result = REJECT,
 },
 {
@@ -23,8 +22,7 @@ 
 	BPF_LD_IMM64(BPF_REG_0, 1),
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "invalid BPF_LD_IMM insn",
-	.errstr_unpriv = "R1 pointer comparison",
+	.errstr = "jump to reserved code",
 	.result = REJECT,
 },
 {
@@ -144,3 +142,13 @@ 
 	.errstr = "unrecognized bpf_ld_imm64 insn",
 	.result = REJECT,
 },
+{
+	"test15 ld_imm64",
+	.insns = {
+	BPF_LD_IMM64(BPF_REG_0, 0),
+	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -2),
+	BPF_EXIT_INSN(),
+	},
+	.errstr = "jump to reserved code",
+	.result = REJECT,
+},