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| author |   Artem Savkov <asavkov@redhat.com> | 2018-11-20 11:52:15 -0600 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-11-20 18:59:00 +0100 |
| commit | 0b9301fb632f7111a3293a30cc5b20f1b82ed08d (patch) | |
| tree | 1af497240491f23d73bb55cfba744fc94c61bde7 /tools/objtool | |
| parent | Linux 4.20-rc3 (diff) | |
| download | linux-dev-0b9301fb632f7111a3293a30cc5b20f1b82ed08d.tar.xz linux-dev-0b9301fb632f7111a3293a30cc5b20f1b82ed08d.zip | |
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 <asavkov@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
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 <mingo@kernel.org>
Diffstat (limited to 'tools/objtool')
| -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; |