CVE-2024-27053: wifi: wilc1000: fix RCU usage in connect path
First published: Wed May 01 2024(Updated: )
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
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/205c50306acf58a335eb19fa84e40140f4fe814f
- https://git.kernel.org/stable/c/4bfd20d5f5c62b5495d6c0016ee6933bd3add7ce
- https://git.kernel.org/stable/c/5800ec78775c0cd646f71eb9bf8402fb794807de
- https://git.kernel.org/stable/c/745003b5917b610352f52fe0d11ef658d6471ec2
- https://git.kernel.org/stable/c/b4bbf38c350acb6500cbe667b1e2e68f896e4b38
- https://git.kernel.org/stable/c/d80fc436751cfa6b02a8eda74eb6cce7dadfe5a2
- https://git.kernel.org/stable/c/dd50d3ead6e3707bb0a5df7cc832730c93ace3a7
- https://git.kernel.org/stable/c/e556006de4ea93abe2b46cba202a2556c544b8b2
- https://launchpad.net/bugs/cve/CVE-2024-27053
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27053
- https://nvd.nist.gov/vuln/detail/CVE-2024-27053
- https://security-tracker.debian.org/tracker/CVE-2024-27053
- https://ubuntu.com/security/CVE-2024-27053
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/linus/205c50306acf58a335eb19fa84e40140f4fe814f
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