CVE-2024-35934

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-35934
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35934.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-35934
Related
Published
2024-05-19T11:15:49Z
Modified
2024-11-05T11:45:39.129407Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

net/smc: reduce rtnl pressure in smcpnetcreatepnetidslist()

Many syzbot reports show extreme rtnl pressure, and many of them hint that smc acquires rtnl in netns creation for no good reason [1]

This patch returns early from smcpnetnet_init() if there is no netdevice yet.

I am not even sure why smcpnetcreatepnetidslist() even exists, because smcpnetnetdevevent() is also calling smcpnetaddbasepnetid() when handling NETDEVUP event.

[1] extract of typical syzbot reports

2 locks held by syz-executor.3/12252: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.4/12253: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.1/12257: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.2/12261: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.0/12265: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.3/12268: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.4/12271: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.1/12274: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878 2 locks held by syz-executor.2/12280: #0: ffffffff8f369610 (pernetopsrwsem){++++}-{3:3}, at: copynetns+0x4c7/0x7b0 net/core/netnamespace.c:491 #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetcreatepnetidslist net/smc/smcpnet.c:809 [inline] #1: ffffffff8f375b88 (rtnlmutex){+.+.}-{3:3}, at: smcpnetnetinit+0x10a/0x1e0 net/smc/smcpnet.c:878

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.216-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2
5.10.158-1
5.10.158-2
5.10.162-1
5.10.178-1
5.10.178-2
5.10.178-3
5.10.179-1
5.10.179-2
5.10.179-3
5.10.179-4
5.10.179-5
5.10.191-1
5.10.197-1
5.10.205-1
5.10.205-2
5.10.209-1
5.10.209-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.90-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.8.9-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.1.112-1
6.1.115-1
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}