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Filename Latest commit message Latest commit date
Pavel Skripkin 343406f9c1 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>
2021-06-30 08:47:47 -04:00
arch MIPS: generic: Update node names to avoid unit addresses 2021-06-30 08:47:44 -04:00
block
certs
crypto
Documentation
drivers net: caif: fix memory leak in ldisc_open 2021-06-30 08:47:47 -04:00
fs
include inet: annotate date races around sk->sk_txhash 2021-06-30 08:47:47 -04:00
init kbuild: add CONFIG_LD_IS_LLD 2021-06-30 08:47:44 -04:00
ipc
kernel module: limit enabling module.sig_enforce 2021-06-30 08:47:42 -04:00
lib
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net ping: Check return value of function 'ping_queue_rcv_skb' 2021-06-30 08:47:47 -04:00
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virt KVM: arm/arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST read 2021-06-23 14:41:31 +02:00
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Makefile Linux 5.4.128 2021-06-23 14:41:32 +02:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.