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| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-06-12 17:51:22 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-14 12:28:16 -0700 |
| commit | 58af3d3d54e87bfc1f936e16c04ade3369d34011 (patch) | |
| tree | 32cb8fc66912fa15130ecd83b6909f8fc815ffd3 /net/ipv4 | |
| parent | 09427c1915f754ebe7d3d8e54e79bbee48afe916 (diff) | |
net: caif: fix memory leak in ldisc_open
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>
Diffstat (limited to 'net/ipv4')
0 files changed, 0 insertions, 0 deletions