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THREATINT
PUBLISHED

CVE-2024-27053

wifi: wilc1000: fix RCU usage in connect path

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

Description

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

Product status

Default status
unaffected

c460495ee072 before e556006de4ea
affected

c460495ee072 before b4bbf38c350a
affected

c460495ee072 before d80fc436751c
affected

c460495ee072 before 745003b5917b
affected

c460495ee072 before 4bfd20d5f5c6
affected

c460495ee072 before 5800ec78775c
affected

c460495ee072 before dd50d3ead6e3
affected

c460495ee072 before 205c50306acf
affected

Default status
affected

5.1
affected

Any version before 5.1
unaffected

5.4.273
unaffected

5.10.214
unaffected

5.15.153
unaffected

6.1.83
unaffected

6.6.23
unaffected

6.7.11
unaffected

6.8.2
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/e556006de4ea93abe2b46cba202a2556c544b8b2

https://git.kernel.org/stable/c/b4bbf38c350acb6500cbe667b1e2e68f896e4b38

https://git.kernel.org/stable/c/d80fc436751cfa6b02a8eda74eb6cce7dadfe5a2

https://git.kernel.org/stable/c/745003b5917b610352f52fe0d11ef658d6471ec2

https://git.kernel.org/stable/c/4bfd20d5f5c62b5495d6c0016ee6933bd3add7ce

https://git.kernel.org/stable/c/5800ec78775c0cd646f71eb9bf8402fb794807de

https://git.kernel.org/stable/c/dd50d3ead6e3707bb0a5df7cc832730c93ace3a7

https://git.kernel.org/stable/c/205c50306acf58a335eb19fa84e40140f4fe814f

cve.org CVE-2024-27053

nvd.nist.gov CVE-2024-27053

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