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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-50304

ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find() The per-netns IP tunnel hash table is protected by the RTNL mutex and ip_tunnel_find() is only called from the control path where the mutex is taken. Add a lockdep expression to hlist_for_each_entry_rcu() in ip_tunnel_find() in order to validate that the mutex is held and to silence the suspicious RCU usage warning [1]. [1] WARNING: suspicious RCU usage 6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted ----------------------------- net/ipv4/ip_tunnel.c:221 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by ip/362: #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60 stack backtrace: CPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <TASK> dump_stack_lvl+0xba/0x110 lockdep_rcu_suspicious.cold+0x4f/0xd6 ip_tunnel_find+0x435/0x4d0 ip_tunnel_newlink+0x517/0x7a0 ipgre_newlink+0x14c/0x170 __rtnl_newlink+0x1173/0x19c0 rtnl_newlink+0x6c/0xa0 rtnetlink_rcv_msg+0x3cc/0xf60 netlink_rcv_skb+0x171/0x450 netlink_unicast+0x539/0x7f0 netlink_sendmsg+0x8c1/0xd80 ____sys_sendmsg+0x8f9/0xc20 ___sys_sendmsg+0x197/0x1e0 __sys_sendmsg+0x122/0x1f0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c54419321455631079c7d6e60bc732dd0c5914c5 to < 31bd7378c6fe100a8af0e996ea0b5dafd3579df6affected
  • c54419321455631079c7d6e60bc732dd0c5914c5 to < 6ac5dfa575136da8dd8a9e7c1437c41f3a593993affected
  • c54419321455631079c7d6e60bc732dd0c5914c5 to < ce11424026cbf87d5861b09e5e33565ff7f2ec8daffected
  • c54419321455631079c7d6e60bc732dd0c5914c5 to < e0500e4373cd3d5eace1f1712444ab830b82c114affected
  • c54419321455631079c7d6e60bc732dd0c5914c5 to < f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6affected
  • c54419321455631079c7d6e60bc732dd0c5914c5 to < 90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12affected

Linux Linux

Default version status: affected

  • 3.10affected
  • 0 to < 3.10unaffected
  • 5.10.234 to ≤ 5.10.*unaffected
  • 5.15.178 to ≤ 5.15.*unaffected
  • 6.1.128 to ≤ 6.1.*unaffected
  • 6.6.75 to ≤ 6.6.*unaffected
  • 6.11.7 to ≤ 6.11.*unaffected
  • 6.12 to ≤ *unaffected

References