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| author | Nick Alcock <nick.alcock@oracle.com> | 2024-07-29 12:45:09 +0100 |
|---|---|---|
| committer | Nick Alcock <nick.alcock@oracle.com> | 2024-08-02 12:44:27 +0100 |
| commit | 66dd4c38500c162323cb22cf723c5d3b72dacc17 (patch) | |
| tree | 34ac89cf28f0a3ad69df2c9f7509f01e52507dfe | |
| parent | a281816c8aeb12619d34eec8959a43dfa5c6b4ec (diff) | |
| download | gdb-binutils-2_36-branch.zip gdb-binutils-2_36-branch.tar.gz gdb-binutils-2_36-branch.tar.bz2 | |
libctf: fix ref leak of names of newly-inserted non-root-visible typesbinutils-2_36-branch
A bug in ctf_dtd_delete led to refs in the string table to the
names of non-root-visible types not being removed when the DTD
was. This seems harmless, but actually it would lead to a write
down a pointer into freed memory if such a type was ctf_rollback()ed
over and then the dict was serialized (updating all the refs as the
strtab was serialized in turn).
Bug introduced in commit fe4c2d55634c700ba527ac4183e05c66e9f93c62
("libctf: create: non-root-visible types should not appear in name tables")
which is included in binutils 2.35.
libctf/
* ctf-create.c (ctf_dtd_delete): Remove refs for all types
with names, not just root-visible ones.
| -rw-r--r-- | libctf/ctf-create.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libctf/ctf-create.c b/libctf/ctf-create.c index 50f48eb..b85a978 100644 --- a/libctf/ctf-create.c +++ b/libctf/ctf-create.c @@ -1317,11 +1317,11 @@ ctf_dtd_delete (ctf_dict_t *fp, ctf_dtdef_t *dtd) } if (dtd->dtd_data.ctt_name - && (name = ctf_strraw (fp, dtd->dtd_data.ctt_name)) != NULL - && LCTF_INFO_ISROOT (fp, dtd->dtd_data.ctt_info)) + && (name = ctf_strraw (fp, dtd->dtd_data.ctt_name)) != NULL) { - ctf_dynhash_remove (ctf_name_table (fp, name_kind)->ctn_writable, - name); + if (LCTF_INFO_ISROOT (fp, dtd->dtd_data.ctt_info)) + ctf_dynhash_remove (ctf_name_table (fp, name_kind)->ctn_writable, + name); ctf_str_remove_ref (fp, name, &dtd->dtd_data.ctt_name); } |