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| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-06-12 17:51:22 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2021-06-30 08:49:37 -0400 |
| commit | dede006783102f26a49e9eb33fd673b2937ed692 (patch) | |
| tree | 6b20a6f20254ccc908cc9195edcb9257a3d0cf15 /net/lapb/lapb_timer.c | |
| parent | 333afa6d5e273af8969df1f805ae88a9816db1b4 (diff) | |
net: caif: fix memory leak in ldisc_open
[ Upstream commit 58af3d3d54e87bfc1f936e16c04ade3369d34011 ]
Syzbot reported memory leak in tty_init_dev().
The problem was in unputted tty in ldisc_open()
static int ldisc_open(struct tty_struct *tty)
{
...
ser->tty = tty_kref_get(tty);
...
result = register_netdevice(dev);
if (result) {
rtnl_unlock();
free_netdev(dev);
return -ENODEV;
}
...
}
Ser pointer is netdev private_data, so after free_netdev()
this pointer goes away with unputted tty reference. So, fix
it by adding tty_kref_put() before freeing netdev.
Reported-and-tested-by: syzbot+f303e045423e617d2cad@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions