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| author | Andrey Konovalov <andreyknvl@google.com> | 2019-07-29 16:35:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 21:01:07 +0200 |
| commit | 2e486758901d321f2412a928a7383d099119837c (patch) | |
| tree | 0ce6762f7c8273f2fff82895448618e345c3632c | |
| parent | ac375073bb395750edd1652e420131acfc5b08d5 (diff) | |
| download | linux-stable-2e486758901d321f2412a928a7383d099119837c.tar.gz linux-stable-2e486758901d321f2412a928a7383d099119837c.tar.bz2 linux-stable-2e486758901d321f2412a928a7383d099119837c.zip | |
NFC: fix attrs checks in netlink interface
commit 18917d51472fe3b126a3a8f756c6b18085eb8130 upstream.
nfc_genl_deactivate_target() relies on the NFC_ATTR_TARGET_INDEX
attribute being present, but doesn't check whether it is actually
provided by the user. Same goes for nfc_genl_fw_download() and
NFC_ATTR_FIRMWARE_NAME.
This patch adds appropriate checks.
Found with syzkaller.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/nfc/netlink.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 32cb0c87e852..80def98c9dba 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -936,7 +936,8 @@ static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info) int rc; u32 idx; - if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_TARGET_INDEX]) return -EINVAL; idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); @@ -985,7 +986,8 @@ static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info) struct sk_buff *msg = NULL; u32 idx; - if (!info->attrs[NFC_ATTR_DEVICE_INDEX]) + if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || + !info->attrs[NFC_ATTR_FIRMWARE_NAME]) return -EINVAL; idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); |