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objtool: Fix memory leak in create_static_call_sections()

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

Fixes: 1e7e47883830 ("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>

authored by

Miaoqian Lin and committed by
Ingo Molnar 3da73f10 88603b6d

+2
+2
tools/objtool/check.c
··· 679 679 if (strncmp(key_name, STATIC_CALL_TRAMP_PREFIX_STR, 680 680 STATIC_CALL_TRAMP_PREFIX_LEN)) { 681 681 WARN("static_call: trampoline name malformed: %s", key_name); 682 + free(key_name); 682 683 return -1; 683 684 } 684 685 tmp = key_name + STATIC_CALL_TRAMP_PREFIX_LEN - STATIC_CALL_KEY_PREFIX_LEN; ··· 689 688 if (!key_sym) { 690 689 if (!opts.module) { 691 690 WARN("static_call: can't find static_call_key symbol: %s", tmp); 691 + free(key_name); 692 692 return -1; 693 693 } 694 694