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objtool: Fix memory leak in create_static_call_sections()

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[ Upstream commit 3da73f1023 ]

strdup() allocates memory for key_name. We need to release the memory in
the following error paths. Add free() to avoid memory leak.

Fixes: 1e7e478838 ("x86/static_call: Add inline static call implementation for x86-64")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20221205080642.558583-1-linmq006@gmail.com
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Miaoqian Lin 2022-12-05 12:06:42 +04:00 committed by Greg Kroah-Hartman
parent ea30508b7b
commit 3a75866a5c
1 changed files with 2 additions and 0 deletions
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2
tools/objtool/check.c
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@ -573,6 +573,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (strncmp(key_name, STATIC_CALL_TRAMP_PREFIX_STR,
STATIC_CALL_TRAMP_PREFIX_LEN)) {
WARN("static_call: trampoline name malformed: %s", key_name);
free(key_name);
return -1;
}
tmp = key_name + STATIC_CALL_TRAMP_PREFIX_LEN - STATIC_CALL_KEY_PREFIX_LEN;
@ -582,6 +583,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (!key_sym) {
if (!module) {
WARN("static_call: can't find static_call_key symbol: %s", tmp);
free(key_name);
return -1;
}