linux/net/9p
Fedor Pchelkin ff49bf1867 net: 9p: avoid freeing uninit memory in p9pdu_vreadf
If some of p9pdu_readf() calls inside case 'T' in p9pdu_vreadf() fails,
the error path is not handled properly. *wnames or members of *wnames
array may be left uninitialized and invalidly freed.

Initialize *wnames to NULL in beginning of case 'T'. Initialize the first
*wnames array element to NULL and nullify the failing *wnames element so
that the error path freeing loop stops on the first NULL element and
doesn't proceed further.

Found by Linux Verification Center (linuxtesting.org).

Fixes: ace51c4dd2 ("9p: add new protocol support code")
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Message-ID: <20231206200913.16135-1-pchelkin@ispras.ru>
Cc: stable@vger.kernel.org
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
2023-12-13 05:44:30 +09:00
..
client.c 9p/net: fix possible memory leak in p9_check_errors() 2023-10-27 12:44:13 +09:00
error.c 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
Kconfig 9p: Remove INET dependency 2023-05-04 21:46:57 +01:00
Makefile 9p/trans_fd: split into dedicated module 2022-01-10 09:58:30 +09:00
mod.c net/p9: load default transports 2022-01-10 10:00:09 +09:00
protocol.c net: 9p: avoid freeing uninit memory in p9pdu_vreadf 2023-12-13 05:44:30 +09:00
protocol.h net/9p: add p9_msg_buf_size() 2022-10-05 07:05:41 +09:00
trans_common.c 9p: fix file headers 2021-11-03 17:45:04 +09:00
trans_common.h 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
trans_fd.c 9p/trans_fd: Annotate data-racy writes to file::f_flags 2023-10-26 07:05:42 +09:00
trans_rdma.c 9p/rdma: unmap receive dma buffer in rdma_request()/post_recv() 2023-02-24 13:42:28 +00:00
trans_virtio.c 9p: virtio: skip incrementing unused variable 2023-07-20 19:14:50 +00:00
trans_xen.c 9p/net: xen: fix false positive printf format overflow warning 2023-10-27 12:44:08 +09:00