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| author | Navid Emamdoost <navid.emamdoost@gmail.com> | 2024-02-18 07:25:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-02-18 16:01:18 +0300 |
| commit | 31edf4bbe0ba27fd03ac7d87eb2ee3d2a231af6d (patch) | |
| tree | d15a2d90e3c1ea692ae7b9c846b8d5dd4c8b8963 /drivers/block | |
| parent | d69591caec243811449d4e6571fbf460f06fb8f6 (diff) | |
| download | linux-31edf4bbe0ba27fd03ac7d87eb2ee3d2a231af6d.tar.xz | |
nbd: null check for nla_nest_start
nla_nest_start() may fail and return NULL. Insert a check and set errno
based on other call sites within the same source code.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Fixes: 47d902b90a32 ("nbd: add a status netlink command")
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20240218042534.it.206-kees@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/nbd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 30ae3cc12e77..d2b422d842b7 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -2433,6 +2433,12 @@ static int nbd_genl_status(struct sk_buff *skb, struct genl_info *info) } dev_list = nla_nest_start_noflag(reply, NBD_ATTR_DEVICE_LIST); + if (!dev_list) { + nlmsg_free(reply); + ret = -EMSGSIZE; + goto out; + } + if (index == -1) { ret = idr_for_each(&nbd_index_idr, &status_cb, reply); if (ret) { |