From: Eric Biggers <ebiggers@kernel.org> mainline inclusion from mainline-v6.17 commit d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb 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/torvalds/linux.git/commit/?i... ------------------------------- 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: 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 db6480e95948..ca3cd8118639 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