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authorJens Axboe <axboe@kernel.dk>2022-12-19 07:28:26 -0700
committerJens Axboe <axboe@kernel.dk>2022-12-19 07:35:16 -0700
commit990a4de57e44f4f4cfc33c90d2ec5d285b7c8342 (patch)
treead7c78ea4d3c6dd041985afd9fe4a5dfdad8a712 /io_uring/net.c
parent35d90f95cfa773b7e3b1f57ba15ce06a470f354c (diff)
io_uring/net: ensure compat import handlers clear free_iov
If we're not allocating the vectors because the count is below UIO_FASTIOV, we still do need to properly clear ->free_iov to prevent an erronous free of on-stack data. Reported-by: Jiri Slaby <jirislaby@gmail.com> Fixes: 4c17a496a7a0 ("io_uring/net: fix cleanup double free free_iov init") Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/net.c')
-rw-r--r--io_uring/net.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/io_uring/net.c b/io_uring/net.c
index 5229976cb582..f76b688f476e 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -494,6 +494,7 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
if (req->flags & REQ_F_BUFFER_SELECT) {
compat_ssize_t clen;
+ iomsg->free_iov = NULL;
if (msg.msg_iovlen == 0) {
sr->len = 0;
} else if (msg.msg_iovlen > 1) {