diff mbox series

[bpf-next,v1,4/7] bpf: Remove unused MEM_ALLOC | PTR_TRUSTED checks

Message ID 20230219155249.1755998-5-memxor@gmail.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Add support for kptrs in more BPF maps | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -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: 10 this patch: 10
netdev/cc_maintainers warning 7 maintainers not CCed: john.fastabend@gmail.com sdf@google.com jolsa@kernel.org song@kernel.org martin.lau@linux.dev haoluo@google.com yhs@fb.com
netdev/build_clang success Errors and warnings before: 1 this patch: 1
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: 10 this patch: 10
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 14 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-PR success PR summary
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bpf/vmtest-bpf-next-VM_Test-38 success Logs for test_verifier on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-10 success Logs for test_maps on aarch64 with llvm-16
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Commit Message

Kumar Kartikeya Dwivedi Feb. 19, 2023, 3:52 p.m. UTC 
The plan is to supposedly tag everything with PTR_TRUSTED eventually,
however those changes should bring in their respective code, instead
of leaving it around right now. It is arguable whether PTR_TRUSTED is
required for all types, when it's only use case is making PTR_TO_BTF_ID
a bit stronger, while all other types are trusted by default.

Hence, just drop the two instances which do not occur in the verifier
for now to avoid reader confusion.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
 kernel/bpf/verifier.c | 2 --
 1 file changed, 2 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 9a4e7efaf28f..6837657b46bf 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -6651,7 +6651,6 @@  int check_func_arg_reg_off(struct bpf_verifier_env *env,
 	case PTR_TO_BTF_ID | MEM_ALLOC:
 	case PTR_TO_BTF_ID | PTR_TRUSTED:
 	case PTR_TO_BTF_ID | MEM_RCU:
-	case PTR_TO_BTF_ID | MEM_ALLOC | PTR_TRUSTED:
 	case PTR_TO_BTF_ID | MEM_ALLOC | NON_OWN_REF:
 		/* When referenced PTR_TO_BTF_ID is passed to release function,
 		 * its fixed offset must be 0. In the other cases, fixed offset
@@ -9210,7 +9209,6 @@  static int check_reg_allocation_locked(struct bpf_verifier_env *env, struct bpf_
 		ptr = reg->map_ptr;
 		break;
 	case PTR_TO_BTF_ID | MEM_ALLOC:
-	case PTR_TO_BTF_ID | MEM_ALLOC | PTR_TRUSTED:
 		ptr = reg->btf;
 		break;
 	default: