AZL-53900
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-53900.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-53900
- Upstream
- Published
- 2024-11-19T18:15:24Z
- Modified
- 2026-04-01T05:18:09.492030Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-53042 affecting package kernel for versions less than 6.6.64.2-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ipv4: iptunnel: Fix suspicious RCU usage warning in iptunnelinitflow()
There are code paths from which the function is called without holding the RCU read lock, resulting in a suspicious RCU usage warning [1].
Fix by using l3mdevmasterupperifindexbyindex() which will acquire the RCU read lock before calling l3mdevmasterupperifindexbyindex_rcu().
[1] WARNING: suspicious RCU usage
6.12.0-rc3-custom-gac8f72681cf2 #141 Not tainted
net/core/dev.c:876 RCU-list traversed in non-reader section!!
other info that might help us debug this:
rcuscheduleractive = 2, debuglocks = 1 1 lock held by ip/361: #0: ffffffff86fc7cb0 (rtnlmutex){+.+.}-{3:3}, at: rtnetlinkrcvmsg+0x377/0xf60
stack backtrace: CPU: 3 UID: 0 PID: 361 Comm: ip Not tainted 6.12.0-rc3-custom-gac8f72681cf2 #141 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <TASK> dumpstacklvl+0xba/0x110 lockdeprcususpicious.cold+0x4f/0xd6 devgetbyindexrcu+0x1d3/0x210 l3mdevmasterupperifindexbyindexrcu+0x2b/0xf0 iptunnelbinddev+0x72f/0xa00 iptunnelnewlink+0x368/0x7a0 ipgrenewlink+0x14c/0x170 __rtnlnewlink+0x1173/0x19c0 rtnlnewlink+0x6c/0xa0 rtnetlinkrcvmsg+0x3cc/0xf60 netlinkrcvskb+0x171/0x450 netlinkunicast+0x539/0x7f0 netlinksendmsg+0x8c1/0xd80 ____sys_sendmsg+0x8f9/0xc20 ___sys_sendmsg+0x197/0x1e0 _syssendmsg+0x122/0x1f0 dosyscall64+0xbb/0x1d0 entrySYSCALL64afterhwframe+0x77/0x7f
- References