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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-11-23 19:04:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-04 15:34:36 +0300 |
| commit | 5f9d7ba584a152f56e90821272f51ea32cfa3c65 (patch) | |
| tree | 84bd598228225393d7cbbb1370b5dfd28851d68b | |
| parent | d67e58d136fa6da2afca278d1f24c6f8307ef19a (diff) | |
| download | linux-5f9d7ba584a152f56e90821272f51ea32cfa3c65.tar.xz | |
scripts/kallsyms: fix definitely-lost memory leak
[ Upstream commit 21915eca088dc271c970e8351290e83d938114ac ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | scripts/kallsyms.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index d117c68d1607..b92b704e7ace 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -455,6 +455,8 @@ 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; |