From: Eric Biggers <ebiggers@kernel.org> stable inclusion from stable-v6.6.108 commit 8703940bd30b5ad94408d28d7192db2491cd3592 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ID1OXK CVE: CVE-2025-39964 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb upstream. Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of type u32. However, some assignments to these fields, specifically 'more' and 'merge', assign values greater than 1. These relied on C's implicit conversion to bool, such that zero becomes false and nonzero becomes true. With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken instead, resulting in 0 being assigned in some cases when 1 was intended. Fix this by restoring the bool type. Fixes: 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Gu Bowen <gubowen5@huawei.com> --- include/crypto/if_alg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h index 384684b36aaa..2e43d7704d1d 100644 --- a/include/crypto/if_alg.h +++ b/include/crypto/if_alg.h @@ -156,7 +156,7 @@ struct af_alg_ctx { size_t used; atomic_t rcvused; - u32 more:1, + bool more:1, merge:1, enc:1, write:1, -- 2.43.0