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| author | Yuan Chen <chenyuan@kylinos.cn> | 2025-06-18 09:19:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-17 18:27:41 +0200 |
| commit | d6c6216a7e85107534e8d6b667409c99833b3b7e (patch) | |
| tree | e49dd4a84ef79b95229cc2d0a5766779132d372a /tools | |
| parent | 451b9495fed263301378cb26f084ff83a6bab153 (diff) | |
| download | linux-d6c6216a7e85107534e8d6b667409c99833b3b7e.tar.gz linux-d6c6216a7e85107534e8d6b667409c99833b3b7e.tar.bz2 linux-d6c6216a7e85107534e8d6b667409c99833b3b7e.zip | |
libbpf: Fix null pointer dereference in btf_dump__free on allocation failure
[ Upstream commit aa485e8789d56a4573f7c8d000a182b749eaa64d ]
When btf_dump__new() fails to allocate memory for the internal hashmap
(btf_dump->type_names), it returns an error code. However, the cleanup
function btf_dump__free() does not check if btf_dump->type_names is NULL
before attempting to free it. This leads to a null pointer dereference
when btf_dump__free() is called on a btf_dump object.
Fixes: 351131b51c7a ("libbpf: add btf_dump API for BTF-to-C conversion")
Signed-off-by: Yuan Chen <chenyuan@kylinos.cn>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250618011933.11423-1-chenyuan_fl@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/btf_dump.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c index 2342aec3c5a3..d6818e22503c 100644 --- a/tools/lib/bpf/btf_dump.c +++ b/tools/lib/bpf/btf_dump.c @@ -193,6 +193,9 @@ static void btf_dump_free_names(struct hashmap *map) size_t bkt; struct hashmap_entry *cur; + if (!map) + return; + hashmap__for_each_entry(map, cur, bkt) free((void *)cur->key); |