From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
syzbot+b1bb342d1d097516cbda@syzkaller.appspotmail.com,
Anant Thazhemadam <anant.thazhemadam@gmail.com>,
Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH 4.4 21/39] net: wireless: nl80211: fix out-of-bounds access in nl80211_del_key()
Date: Mon, 12 Oct 2020 15:26:51 +0200 [thread overview]
Message-ID: <20201012132629.133765521@linuxfoundation.org> (raw)
In-Reply-To: <20201012132628.130632267@linuxfoundation.org>
From: Anant Thazhemadam <anant.thazhemadam@gmail.com>
commit 3dc289f8f139997f4e9d3cfccf8738f20d23e47b upstream.
In nl80211_parse_key(), key.idx is first initialized as -1.
If this value of key.idx remains unmodified and gets returned, and
nl80211_key_allowed() also returns 0, then rdev_del_key() gets called
with key.idx = -1.
This causes an out-of-bounds array access.
Handle this issue by checking if the value of key.idx after
nl80211_parse_key() is called and return -EINVAL if key.idx < 0.
Cc: stable@vger.kernel.org
Reported-by: syzbot+b1bb342d1d097516cbda@syzkaller.appspotmail.com
Tested-by: syzbot+b1bb342d1d097516cbda@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Link: https://lore.kernel.org/r/20201007035401.9522-1-anant.thazhemadam@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/wireless/nl80211.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3101,6 +3101,9 @@ static int nl80211_del_key(struct sk_buf
if (err)
return err;
+ if (key.idx < 0)
+ return -EINVAL;
+
if (info->attrs[NL80211_ATTR_MAC])
mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
next prev parent reply other threads:[~2020-10-12 13:33 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 13:26 [PATCH 4.4 00/39] 4.4.239-rc1 review Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 01/39] gpio: tc35894: fix up tc35894 interrupt configuration Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 02/39] Input: i8042 - add nopnp quirk for Acer Aspire 5 A515 Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 03/39] drm/amdgpu: restore proper ref count in amdgpu_display_crtc_set_config Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 04/39] net: dec: de2104x: Increase receive ring size for Tulip Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 05/39] rndis_host: increase sleep time in the query-response loop Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 06/39] drivers/net/wan/lapbether: Make skb->protocol consistent with the header Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 07/39] drivers/net/wan/hdlc: Set skb->protocol before transmitting Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 08/39] nfs: Fix security label length not being reset Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 09/39] clk: samsung: exynos4: mark chipid clock as CLK_IGNORE_UNUSED Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 10/39] iommu/exynos: add missing put_device() call in exynos_iommu_of_xlate() Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 11/39] i2c: cpm: Fix i2c_ram structure Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 12/39] epoll: do not insert into poll queues until all sanity checks are done Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 13/39] epoll: replace ->visited/visited_list with generation count Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 14/39] epoll: EPOLL_CTL_ADD: close the race in decision to take fast path Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 15/39] ep_create_wakeup_source(): dentry name can change under you Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 16/39] netfilter: ctnetlink: add a range check for l3/l4 protonum Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 17/39] fbdev, newport_con: Move FONT_EXTRA_WORDS macros into linux/font.h Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 18/39] Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 19/39] Revert "ravb: Fixed to be able to unload modules" Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 20/39] fbcon: Fix global-out-of-bounds read in fbcon_get_font() Greg Kroah-Hartman
2020-10-12 13:26 ` Greg Kroah-Hartman [this message]
2020-10-12 13:26 ` [PATCH 4.4 22/39] usermodehelper: reset umask to default before executing user process Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 23/39] platform/x86: thinkpad_acpi: initialize tp_nvram_state variable Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 24/39] platform/x86: thinkpad_acpi: re-initialize ACPI buffer size when reuse Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 25/39] driver core: Fix probe_count imbalance in really_probe() Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 26/39] perf top: Fix stdio interface input handling with glibc 2.28+ Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 27/39] sctp: fix sctp_auth_init_hmacs() error path Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 28/39] team: set dev->needed_headroom in team_setup_by_port() Greg Kroah-Hartman
2020-10-12 13:26 ` [PATCH 4.4 29/39] net: team: fix memory leak in __team_options_register Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 30/39] mtd: nand: Provide nand_cleanup() function to free NAND related resources Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 31/39] xfrm: clone XFRMA_REPLAY_ESN_VAL in xfrm_do_migrate Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 32/39] xfrm: clone whole liftime_cur structure " Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 33/39] net: stmmac: removed enabling eee in EEE set callback Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 34/39] xfrm: Use correct address family in xfrm_state_find Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 35/39] bonding: set dev->needed_headroom in bond_setup_by_slave() Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 36/39] rxrpc: Fix rxkad token xdr encoding Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 37/39] rxrpc: Downgrade the BUG() for unsupported token type in rxrpc_read() Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 38/39] rxrpc: Fix server keyring leak Greg Kroah-Hartman
2020-10-12 13:27 ` [PATCH 4.4 39/39] net: usb: rtl8150: set random MAC address when set_ethernet_addr() fails Greg Kroah-Hartman
2020-10-13 8:46 ` [PATCH 4.4 00/39] 4.4.239-rc1 review Naresh Kamboju
2020-10-13 16:38 ` Guenter Roeck
2020-10-13 18:11 ` Pavel Machek
2020-10-14 7:47 ` Greg Kroah-Hartman
2020-10-14 10:18 ` Pavel Machek
2020-10-14 1:43 ` Shuah Khan
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