On Sun, Aug 17, 2025 at 06:59:15PM +0800, Edward Adam Davis wrote: > This is not a leak! The stack memroy is hashed and fed into the > entropy pool. We can't recover the original kernel memory from it. > > Reported-by: syzbot+e8bcd7ee3db6cb5cb875@xxxxxxxxxxxxxxxxxxxxxxxxx > Closes: https://syzkaller.appspot.com/bug?extid=e8bcd7ee3db6cb5cb875 > Signed-off-by: Edward Adam Davis <eadavis@xxxxxx> > --- > V1 -> V2: mark it as unpoison > > crypto/jitterentropy-kcapi.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/crypto/jitterentropy-kcapi.c b/crypto/jitterentropy-kcapi.c > index 1266eb790708..4020a6e41b0e 100644 > --- a/crypto/jitterentropy-kcapi.c > +++ b/crypto/jitterentropy-kcapi.c > @@ -117,6 +117,7 @@ int jent_hash_time(void *hash_state, __u64 time, u8 *addtl, > pr_warn_ratelimited("Unexpected digest size\n"); > return -EINVAL; > } > + kmsan_unpoison_memory(intermediary, SHA3_256_DIGEST_SIZE); Please change SHA3_256_DIGEST_SIZE to sizeof(intermediary). Thanks, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
