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crypto: af_alg - Fix incorrect boolean values in af_alg_ctx

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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>
This commit is contained in:
Eric Biggers 2025-09-24 13:18:22 -07:00 committed by Greg Kroah-Hartman
parent 6200d2e7ea
commit fbe96bd254
1 changed files with 1 additions and 1 deletions
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2
include/crypto/if_alg.h
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@ -152,7 +152,7 @@ struct af_alg_ctx {
size_t used;
atomic_t rcvused;
u32 more:1,
bool more:1,
merge:1,
enc:1,
write:1,