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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pavel Skripkin <paskripkin@gmail.com>,
	syzbot+9ec037722d2603a9f52e@syzkaller.appspotmail.com,
	Alexander Aring <aahringo@redhat.com>,
	Stefan Schmidt <stefan@datenfreihafen.org>,
	Sasha Levin <sashal@kernel.org>,
	linux-wpan@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 38/46] net: mac802154: Fix general protection fault
Date: Mon, 12 Apr 2021 12:23:53 -0400
Message-ID: <20210412162401.314035-38-sashal@kernel.org> (raw)
In-Reply-To: <20210412162401.314035-1-sashal@kernel.org>

From: Pavel Skripkin <paskripkin@gmail.com>

[ Upstream commit 1165affd484889d4986cf3b724318935a0b120d8 ]

syzbot found general protection fault in crypto_destroy_tfm()[1].
It was caused by wrong clean up loop in llsec_key_alloc().
If one of the tfm array members is in IS_ERR() range it will
cause general protection fault in clean up function [1].

Call Trace:
 crypto_free_aead include/crypto/aead.h:191 [inline] [1]
 llsec_key_alloc net/mac802154/llsec.c:156 [inline]
 mac802154_llsec_key_add+0x9e0/0xcc0 net/mac802154/llsec.c:249
 ieee802154_add_llsec_key+0x56/0x80 net/mac802154/cfg.c:338
 rdev_add_llsec_key net/ieee802154/rdev-ops.h:260 [inline]
 nl802154_add_llsec_key+0x3d3/0x560 net/ieee802154/nl802154.c:1584
 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:674
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Reported-by: syzbot+9ec037722d2603a9f52e@syzkaller.appspotmail.com
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210304152125.1052825-1-paskripkin@gmail.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/mac802154/llsec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac802154/llsec.c b/net/mac802154/llsec.c
index 585d33144c33..55550ead2ced 100644
--- a/net/mac802154/llsec.c
+++ b/net/mac802154/llsec.c
@@ -152,7 +152,7 @@ llsec_key_alloc(const struct ieee802154_llsec_key *template)
 	crypto_free_sync_skcipher(key->tfm0);
 err_tfm:
 	for (i = 0; i < ARRAY_SIZE(key->tfm); i++)
-		if (key->tfm[i])
+		if (!IS_ERR_OR_NULL(key->tfm[i]))
 			crypto_free_aead(key->tfm[i]);
 
 	kfree_sensitive(key);
-- 
2.30.2


      parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 16:23 [PATCH AUTOSEL 5.10 01/46] net: ieee802154: fix nl802154 del llsec key Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 02/46] net: ieee802154: fix nl802154 del llsec dev Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 03/46] net: ieee802154: fix nl802154 add llsec key Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 04/46] net: ieee802154: fix nl802154 del llsec devkey Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 05/46] net: ieee802154: nl-mac: fix check on panid Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 18/46] drivers: net: fix memory leak in atusb_probe Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 24/46] net: ieee802154: forbid monitor for set llsec params Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 25/46] net: ieee802154: stop dump llsec keys for monitors Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 26/46] net: ieee802154: forbid monitor for add llsec key Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 27/46] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 28/46] net: ieee802154: stop dump llsec devs for monitors Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 29/46] net: ieee802154: forbid monitor for add llsec dev Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 30/46] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 31/46] net: ieee802154: stop dump llsec devkeys for monitors Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 32/46] net: ieee802154: forbid monitor for add llsec devkey Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 33/46] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 34/46] net: ieee802154: stop dump llsec seclevels for monitors Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 35/46] net: ieee802154: forbid monitor for add llsec seclevel Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 36/46] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:23 ` [PATCH AUTOSEL 5.10 37/46] net: ieee802154: stop dump llsec params for monitors Sasha Levin
2021-04-12 16:23 ` Sasha Levin [this message]

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