]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
wifi: nl80211: Split memcpy() of struct nl80211_wowlan_tcp_data_token flexible array
authorKees Cook <keescook@chromium.org>
Tue, 27 Sep 2022 02:29:23 +0000 (19:29 -0700)
committerJohannes Berg <johannes.berg@intel.com>
Fri, 7 Oct 2022 13:19:06 +0000 (15:19 +0200)
commit10d5ea5a436da8d60cdb5845f454d595accdbce0
tree47a19f25cfd590de7b562b4956d14373e4dde429
parente3e6e1d16a4cf7b63159ec71774e822194071954
wifi: nl80211: Split memcpy() of struct nl80211_wowlan_tcp_data_token flexible array

To work around a misbehavior of the compiler's ability to see into
composite flexible array structs (as detailed in the coming memcpy()
hardening series[1]), split the memcpy() of the header and the payload
so no false positive run-time overflow warning will be generated.

[1] https://lore.kernel.org/linux-hardening/20220901065914.1417829-2-keescook@chromium.org/

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
net/wireless/nl80211.c