In the Linux kernel, the following vulnerability has been resolved:
tipc: force a dst refcount before doing decryption
As it says in commit 3bc07321ccc2 (“xfrm: Force a dst refcount before
entering the xfrm type handlers”):
“Crypto requests might return asynchronous. In this case we leave the
rcu protected region, so force a refcount on the skb’s destination
entry before we enter the xfrm type input/output handlers.”
On TIPC decryption path it has the same problem, and skb_dst_force()
should be called before doing decryption to avoid a possible crash.
Shuang reported this issue when this warning is triggered:
[] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc]
[] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug
[] Workqueue: crypto cryptd_queue_worker
[] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc]
[] Call Trace:
[] tipc_sk_mcast_rcv+0x548/0xea0 [tipc]
[] tipc_rcv+0xcf5/0x1060 [tipc]
[] tipc_aead_decrypt_done+0x215/0x2e0 [tipc]
[] cryptd_aead_crypt+0xdb/0x190
[] cryptd_queue_worker+0xed/0x190
[] process_one_work+0x93d/0x17e0
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/tipc/node.c"
],
"versions": [
{
"version": "fc1b6d6de220",
"lessThan": "3eb1b3962789",
"status": "affected",
"versionType": "git"
},
{
"version": "fc1b6d6de220",
"lessThan": "692803b39a36",
"status": "affected",
"versionType": "git"
},
{
"version": "fc1b6d6de220",
"lessThan": "623c90d86a61",
"status": "affected",
"versionType": "git"
},
{
"version": "fc1b6d6de220",
"lessThan": "b57a4a2dc874",
"status": "affected",
"versionType": "git"
},
{
"version": "fc1b6d6de220",
"lessThan": "6808b4137167",
"status": "affected",
"versionType": "git"
},
{
"version": "fc1b6d6de220",
"lessThan": "2ebe8f840c74",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/tipc/node.c"
],
"versions": [
{
"version": "5.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.5",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.221",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.162",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.96",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.36",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.9.7",
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269
git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8
git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2
git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930
git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76
git.kernel.org/stable/c/b57a4a2dc8746cea58a922ebe31b6aa629d69d93