Commit b7523ed5 authored by Fedor Pchelkin's avatar Fedor Pchelkin Committed by sanglipeng
Browse files

nfc: fix memory leak of se_io context in nfc_genl_se_io

stable inclusion
from stable-v5.10.173
commit 8978315cb4bf8878c9c8ec05dafd8f7ff539860d
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7X0QU

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8978315cb4bf8878c9c8ec05dafd8f7ff539860d



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[ Upstream commit 25ff6f8a ]

The callback context for sending/receiving APDUs to/from the selected
secure element is allocated inside nfc_genl_se_io and supposed to be
eventually freed in se_io_cb callback function. However, there are several
error paths where the bwi_timer is not charged to call se_io_cb later, and
the cb_context is leaked.

The patch proposes to free the cb_context explicitly on those error paths.

At the moment we can't simply check 'dev->ops->se_io()' return value as it
may be negative in both cases: when the timer was charged and was not.

Fixes: 5ce3f32b ("NFC: netlink: SE API implementation")
Reported-by: default avatar <syzbot+df64c0a2e8d68e78a4fa@syzkaller.appspotmail.com>
Signed-off-by: default avatarFedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: default avatarAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarsanglipeng <sanglipeng1@jd.com>
parent 46c65d0d
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