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authorTomas Bortoli <tomasbortoli@gmail.com>2018-07-10 00:29:43 +0200
committerDominique Martinet <dominique.martinet@cea.fr>2018-08-13 09:21:44 +0900
commit7913690dcc5e18e235769fd87c34143072f5dbea (patch)
treef48b46840031b3727b7594be4f83150581a3e802 /net/9p
parent6baaac096179e7f49b7c3d1bc7785d7cd88215ee (diff)
net/9p/client.c: version pointer uninitialized
The p9_client_version() does not initialize the version pointer. If the call to p9pdu_readf() returns an error and version has not been allocated in p9pdu_readf(), then the program will jump to the "error" label and will try to free the version pointer. If version is not initialized, free() will be called with uninitialized, garbage data and will provoke a crash. Link: http://lkml.kernel.org/r/20180709222943.19503-1-tomasbortoli@gmail.com Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com> Reported-by: syzbot+65c6b72f284a39d416b4@syzkaller.appspotmail.com Reviewed-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: stable@vger.kernel.org Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Diffstat (limited to 'net/9p')
-rw-r--r--net/9p/client.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 8bc8b3e91532..dd461c718cf9 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -958,7 +958,7 @@ static int p9_client_version(struct p9_client *c)
{
int err = 0;
struct p9_req_t *req;
- char *version;
+ char *version = NULL;
int msize;
p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n",