Commit c02467aa authored by Ryosuke Yasuoka's avatar Ryosuke Yasuoka Committed by Zheng Zucheng
Browse files

nfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet

stable inclusion
from stable-v6.6.26
commit a946ebee45b09294c8b0b0e77410b763c4d2817a
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9QG8F
CVE: CVE-2024-35915

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a946ebee45b09294c8b0b0e77410b763c4d2817a



--------------------------------

[ Upstream commit d24b03535e5eb82e025219c2f632b485409c898f ]

syzbot reported the following uninit-value access issue [1][2]:

nci_rx_work() parses and processes received packet. When the payload
length is zero, each message type handler reads uninitialized payload
and KMSAN detects this issue. The receipt of a packet with a zero-size
payload is considered unexpected, and therefore, such packets should be
silently discarded.

This patch resolved this issue by checking payload size before calling
each message type handler codes.

Fixes: 6a2968aa ("NFC: basic NCI protocol implementation")
Reported-and-tested-by: default avatar <syzbot+7ea9413ea6749baf5574@syzkaller.appspotmail.com>
Reported-and-tested-by: default avatar <syzbot+29b5ca705d2e0f4a44d2@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=7ea9413ea6749baf5574 [1]
Closes: https://syzkaller.appspot.com/bug?extid=29b5ca705d2e0f4a44d2

 [2]
Signed-off-by: default avatarRyosuke Yasuoka <ryasuoka@redhat.com>
Reviewed-by: default avatarJeremy Cline <jeremy@jcline.org>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarZhangPeng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZheng Zucheng <zhengzucheng@huawei.com>
parent 3747e12f
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