From: Pietro Borrello borrello@diag.uniroma1.it
mainline inclusion from mainline-v6.2-rc7 commit ffe2a22562444720b05bdfeb999c03e810d84cbb category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6I7U2 CVE: CVE-2023-1075
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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tls_is_tx_ready() checks that list_first_entry() does not return NULL. This condition can never happen. For empty lists, list_first_entry() returns the list_entry() of the head, which is a type confusion. Use list_first_entry_or_null() which returns NULL in case of empty lists.
Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance") Signed-off-by: Pietro Borrello borrello@diag.uniroma1.it Link: https://lore.kernel.org/r/20230128-list-entry-null-check-tls-v1-1-525bbfe6f0... Signed-off-by: Jakub Kicinski kuba@kernel.org Conflicts: net/tls/tls_sw.c Signed-off-by: Ziyang Xuan william.xuanziyang@huawei.com Reviewed-by: Yue Haibing yuehaibing@huawei.com Reviewed-by: Wang Weiyang wangweiyang2@huawei.com Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- include/net/tls.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/tls.h b/include/net/tls.h index 27737c7953f3..c837ef871564 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -442,7 +442,7 @@ static inline bool is_tx_ready(struct tls_sw_context_tx *ctx) { struct tls_rec *rec;
- rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); + rec = list_first_entry_or_null(&ctx->tx_list, struct tls_rec, list); if (!rec) return false;