[clang-tools-extra] 01303f6 - [clang-tidy] Fix crash in bugprone-suspicious-realloc-usage.
Balázs Kéri via cfe-commits
cfe-commits at lists.llvm.org
Wed Dec 21 00:30:10 PST 2022
Author: Balázs Kéri
Date: 2022-12-21T09:29:20+01:00
New Revision: 01303f6d1bba5f8640aab022469f9e9a9d66f877
URL: https://github.com/llvm/llvm-project/commit/01303f6d1bba5f8640aab022469f9e9a9d66f877
DIFF: https://github.com/llvm/llvm-project/commit/01303f6d1bba5f8640aab022469f9e9a9d66f877.diff
LOG: [clang-tidy] Fix crash in bugprone-suspicious-realloc-usage.
The problem occurs if a statement is found by the checker that has a null child.
Fixes issue #59518.
Reviewed By: hokein
Differential Revision: https://reviews.llvm.org/D140194
Added:
Modified:
clang-tools-extra/clang-tidy/bugprone/SuspiciousReallocUsageCheck.cpp
clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-realloc-usage.cpp
Removed:
################################################################################
diff --git a/clang-tools-extra/clang-tidy/bugprone/SuspiciousReallocUsageCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SuspiciousReallocUsageCheck.cpp
index bb975bc893d0d..9b78c219fc5a9 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SuspiciousReallocUsageCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SuspiciousReallocUsageCheck.cpp
@@ -95,7 +95,7 @@ class FindAssignToVarBefore
}
bool VisitStmt(const Stmt *S) {
for (const Stmt *Child : S->children())
- if (Visit(Child))
+ if (Child && Visit(Child))
return true;
return false;
}
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-realloc-usage.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-realloc-usage.cpp
index 6e3c7f4174845..3647d1232b4ff 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-realloc-usage.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone/suspicious-realloc-usage.cpp
@@ -100,3 +100,10 @@ void warn_if_copy_exists_after(void *p) {
// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: 'p' may be set to null if 'realloc' fails, which may result in a leak of the original buffer [bugprone-suspicious-realloc-usage]
void *q = p;
}
+
+void test_null_child(void *p) {
+ for (;;)
+ break;
+ p = realloc(p, 111);
+ // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: 'p' may be set to null if 'realloc' fails, which may result in a leak of the original buffer [bugprone-suspicious-realloc-usage]
+}
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