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authorPavel Skripkin <paskripkin@gmail.com>2021-09-02 21:04:00 +0200
committerSteffen Klassert <steffen.klassert@secunet.com>2021-09-09 12:12:17 +0200
commit3c10ffddc61f8a1a59e29a110ba70b47e679206a (patch)
tree7af23af0a5764faae0f99988c410e224cbaf44dc /kernel/configs/nopm.config
parentMerge tag 'net-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/net... (diff)
downloadlinux-3c10ffddc61f8a1a59e29a110ba70b47e679206a.tar.xz
linux-3c10ffddc61f8a1a59e29a110ba70b47e679206a.zip
net: xfrm: fix shift-out-of-bounds in xfrm_get_default
Syzbot hit shift-out-of-bounds in xfrm_get_default. The problem was in missing validation check for user data. up->dirmask comes from user-space, so we need to check if this value is less than XFRM_USERPOLICY_DIRMASK_MAX to avoid shift-out-of-bounds bugs. Fixes: 2d151d39073a ("xfrm: Add possibility to set the default to block if we have no policy") Reported-and-tested-by: syzbot+b2be9dd8ca6f6c73ee2d@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'kernel/configs/nopm.config')
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