diff options
| author | Artem Savkov <[email protected]> | 2018-11-20 11:52:15 -0600 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-11-20 18:59:00 +0100 |
| commit | 0b9301fb632f7111a3293a30cc5b20f1b82ed08d (patch) | |
| tree | 1af497240491f23d73bb55cfba744fc94c61bde7 | |
| parent | 9ff01193a20d391e8dbce4403dd5ef87c7eaaca6 (diff) | |
objtool: Fix double-free in .cold detection error path
If read_symbols() fails during second list traversal (the one dealing
with ".cold" subfunctions) it frees the symbol, but never deletes it
from the list/hash_table resulting in symbol being freed again in
elf_close(). Fix it by just returning an error, leaving cleanup to
elf_close().
Signed-off-by: Artem Savkov <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: 13810435b9a7 ("objtool: Support GCC 8's cold subfunctions")
Link: http://lkml.kernel.org/r/beac5a9b7da9e8be90223459dcbe07766ae437dd.1542736240.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | tools/objtool/elf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 6dbb9fae0f9d..e7a7ac40e045 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -312,7 +312,7 @@ static int read_symbols(struct elf *elf) if (!pfunc) { WARN("%s(): can't find parent function", sym->name); - goto err; + return -1; } sym->pfunc = pfunc; |