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authorJens Axboe <axboe@kernel.dk>2022-04-26 19:34:57 -0600
committerJens Axboe <axboe@kernel.dk>2022-04-26 20:48:37 -0600
commit5a1e99b61b0c81388cde0c808b3e4173907df19f (patch)
tree87f1a705ad7cadf1cb07cbefd856589645a0c48d /fs
parent588faa1ea5eecb351100ee5d187b9be99210f70d (diff)
downloadlinux-5a1e99b61b0c81388cde0c808b3e4173907df19f.tar.bz2
io_uring: check reserved fields for recv/recvmsg
We should check unused fields for non-zero and -EINVAL if they are set, making it consistent with other opcodes. Fixes: aa1fa28fc73e ("io_uring: add support for recvmsg()") Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
-rw-r--r--fs/io_uring.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 136c2fc49a1e..92ac50f139cd 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5420,6 +5420,8 @@ static int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
return -EINVAL;
+ if (unlikely(sqe->addr2 || sqe->file_index))
+ return -EINVAL;
sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);