CVE-2024-27053
wifi: wilc1000: fix RCU usage in connect path
We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.
Please see our statement on Data Privacy.
wifi: wilc1000: fix RCU usage in connect path
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix RCU usage in connect path With lockdep enabled, calls to the connect function from cfg802.11 layer lead to the following warning: ============================= WARNING: suspicious RCU usage 6.7.0-rc1-wt+ #333 Not tainted ----------------------------- drivers/net/wireless/microchip/wilc1000/hif.c:386 suspicious rcu_dereference_check() usage! [...] stack backtrace: CPU: 0 PID: 100 Comm: wpa_supplicant Not tainted 6.7.0-rc1-wt+ #333 Hardware name: Atmel SAMA5 unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x34/0x48 dump_stack_lvl from wilc_parse_join_bss_param+0x7dc/0x7f4 wilc_parse_join_bss_param from connect+0x2c4/0x648 connect from cfg80211_connect+0x30c/0xb74 cfg80211_connect from nl80211_connect+0x860/0xa94 nl80211_connect from genl_rcv_msg+0x3fc/0x59c genl_rcv_msg from netlink_rcv_skb+0xd0/0x1f8 netlink_rcv_skb from genl_rcv+0x2c/0x3c genl_rcv from netlink_unicast+0x3b0/0x550 netlink_unicast from netlink_sendmsg+0x368/0x688 netlink_sendmsg from ____sys_sendmsg+0x190/0x430 ____sys_sendmsg from ___sys_sendmsg+0x110/0x158 ___sys_sendmsg from sys_sendmsg+0xe8/0x150 sys_sendmsg from ret_fast_syscall+0x0/0x1c This warning is emitted because in the connect path, when trying to parse target BSS parameters, we dereference a RCU pointer whithout being in RCU critical section. Fix RCU dereference usage by moving it to a RCU read critical section. To avoid wrapping the whole wilc_parse_join_bss_param under the critical section, just use the critical section to copy ies data
Reserved 2024-02-19 | Published 2024-05-01 | Updated 2025-02-05 | Assigner Linuxgit.kernel.org/...c/e556006de4ea93abe2b46cba202a2556c544b8b2
git.kernel.org/...c/b4bbf38c350acb6500cbe667b1e2e68f896e4b38
git.kernel.org/...c/d80fc436751cfa6b02a8eda74eb6cce7dadfe5a2
git.kernel.org/...c/745003b5917b610352f52fe0d11ef658d6471ec2
git.kernel.org/...c/4bfd20d5f5c62b5495d6c0016ee6933bd3add7ce
git.kernel.org/...c/5800ec78775c0cd646f71eb9bf8402fb794807de
git.kernel.org/...c/dd50d3ead6e3707bb0a5df7cc832730c93ace3a7
git.kernel.org/...c/205c50306acf58a335eb19fa84e40140f4fe814f
Support options
