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| author | Jens Axboe <axboe@kernel.dk> | 2022-12-19 15:28:26 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-12-19 15:35:16 +0100 |
| commit | 990a4de57e44f4f4cfc33c90d2ec5d285b7c8342 (patch) | |
| tree | ad7c78ea4d3c6dd041985afd9fe4a5dfdad8a712 /io_uring | |
| parent | io_uring: include task_work run after scheduling in wait for events (diff) | |
| download | linux-990a4de57e44f4f4cfc33c90d2ec5d285b7c8342.tar.xz linux-990a4de57e44f4f4cfc33c90d2ec5d285b7c8342.zip | |
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')
| -rw-r--r-- | io_uring/net.c | 1 |
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) { |