diff mbox series

[v1,bpf-next,1/9,DONOTAPPLY] Revert "bpf: Disable bpf_refcount_acquire kfunc calls until race conditions are fixed"

Message ID 20230504053338.1778690-2-davemarchevsky@fb.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series bpf_refcount followups (part 1) | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR success PR summary
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next
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: 20 this patch: 20
netdev/cc_maintainers warning 11 maintainers not CCed: yhs@fb.com kpsingh@kernel.org martin.lau@linux.dev john.fastabend@gmail.com song@kernel.org sdf@google.com shuah@kernel.org mykolal@fb.com linux-kselftest@vger.kernel.org jolsa@kernel.org haoluo@google.com
netdev/build_clang success Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
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: 20 this patch: 20
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 21 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-next-VM_Test-1 success Logs for ShellCheck
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bpf/vmtest-bpf-next-VM_Test-7 success Logs for set-matrix
bpf/vmtest-bpf-next-VM_Test-3 success Logs for build for aarch64 with llvm-17
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bpf/vmtest-bpf-next-VM_Test-26 success Logs for test_progs_no_alu32_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-31 success Logs for test_verifier on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-23 success Logs for test_progs_no_alu32_parallel on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-33 success Logs for test_verifier on s390x with gcc
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Commit Message

Dave Marchevsky May 4, 2023, 5:33 a.m. UTC 
This patch should not be applied with the rest of the series as the
series doesn't fix all bpf_refcount issues. It is included here to allow
CI to run the test added later in the series.

Followup series which fixes the remaining problems will include a revert
that should be applied.

Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
---
 kernel/bpf/verifier.c                                    | 5 +----
 tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c | 2 ++
 2 files changed, 3 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index ff4a8ab99f08..6f39534ded2e 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -10572,10 +10572,7 @@  static int check_kfunc_args(struct bpf_verifier_env *env, struct bpf_kfunc_call_
 				verbose(env, "arg#%d doesn't point to a type with bpf_refcount field\n", i);
 				return -EINVAL;
 			}
-			if (rec->refcount_off >= 0) {
-				verbose(env, "bpf_refcount_acquire calls are disabled for now\n");
-				return -EINVAL;
-			}
+
 			meta->arg_refcount_acquire.btf = reg->btf;
 			meta->arg_refcount_acquire.btf_id = reg->btf_id;
 			break;
diff --git a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
index 595cbf92bff5..2ab23832062d 100644
--- a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
+++ b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
@@ -9,8 +9,10 @@ 
 
 void test_refcounted_kptr(void)
 {
+	RUN_TESTS(refcounted_kptr);
 }
 
 void test_refcounted_kptr_fail(void)
 {
+	RUN_TESTS(refcounted_kptr_fail);
 }