Thread (64 messages) 64 messages, 10 authors, 2023-02-04

[PATCH v2 08/16] objtool: Fix SEGFAULT

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STALE1345d

From: Sathvika Vasireddy <hidden>
Date: 2022-08-29 05:54:27
Also in: lkml
Subsystem: objtool, the rest · Maintainers: Josh Poimboeuf, Peter Zijlstra, Linus Torvalds

Revision v2 of 7 in this series.

Revisions (7)
  1. v3 [diff vs current]
  2. v1 [diff vs current]
  3. v2 current
  4. v3 [diff vs current]
  5. v4 [diff vs current]
  6. v5 [diff vs current]
  7. v6 [diff vs current]
From: Christophe Leroy <redacted>

find_insn() will return NULL in case of failure. Check insn in order
to avoid a kernel Oops for NULL pointer dereference.

Signed-off-by: Christophe Leroy <redacted>
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 91678252a9b6..ed2fdfeb1d9c 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -205,7 +205,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
 		return false;
 
 	insn = find_insn(file, func->sec, func->offset);
-	if (!insn->func)
+	if (!insn || !insn->func)
 		return false;
 
 	func_for_each_insn(file, func, insn) {
-- 
2.31.1
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