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authorMasahiro Yamada <yamada.masahiro@socionext.com>2019-11-24 01:04:30 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-11-25 21:00:33 +0900
commit21915eca088dc271c970e8351290e83d938114ac (patch)
treef0310de5a5911d4373276c7e001a9a54cf13f6ac
parent1ef26b7c948128dc9240939da06690bfd90f4607 (diff)
scripts/kallsyms: fix definitely-lost memory leak
build_initial_tok_table() overwrites unused sym_entry to shrink the table size. Before the entry is overwritten, table[i].sym must be freed since it is malloc'ed data. This fixes the 'definitely lost' report from valgrind. I ran valgrind against x86_64_defconfig of v5.4-rc8 kernel, and here is the summary: [Before the fix] LEAK SUMMARY: definitely lost: 53,184 bytes in 2,874 blocks [After the fix] LEAK SUMMARY: definitely lost: 0 bytes in 0 blocks Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
-rw-r--r--scripts/kallsyms.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 918c2ba071b5..79641874d860 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -487,6 +487,8 @@ static void build_initial_tok_table(void)
table[pos] = table[i];
learn_symbol(table[pos].sym, table[pos].len);
pos++;
+ } else {
+ free(table[i].sym);
}
}
table_cnt = pos;