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| author | YueHaibing <yuehaibing@huawei.com> | 2019-03-02 10:34:55 +0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2019-07-09 22:04:10 +0100 |
| commit | 3c169c57e6c00c36b16c59ccb0e5adbd784b157b (patch) | |
| tree | 6a39541f435591052eca1ec5d753feeeb0aeb9a9 | |
| parent | 66c4b551dca9fa22b3f9464d54f09fd53c5d3d44 (diff) | |
| download | linux-stable-3c169c57e6c00c36b16c59ccb0e5adbd784b157b.tar.gz linux-stable-3c169c57e6c00c36b16c59ccb0e5adbd784b157b.tar.bz2 linux-stable-3c169c57e6c00c36b16c59ccb0e5adbd784b157b.zip | |
net-sysfs: Fix mem leak in netdev_register_kobject
commit 895a5e96dbd6386c8e78e5b78e067dcc67b7f0ab upstream.
syzkaller report this:
BUG: memory leak
unreferenced object 0xffff88837a71a500 (size 256):
comm "syz-executor.2", pid 9770, jiffies 4297825125 (age 17.843s)
hex dump (first 32 bytes):
00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........
ff ff ff ff ff ff ff ff 20 c0 ef 86 ff ff ff ff ........ .......
backtrace:
[<00000000db12624b>] netdev_register_kobject+0x124/0x2e0 net/core/net-sysfs.c:1751
[<00000000dc49a994>] register_netdevice+0xcc1/0x1270 net/core/dev.c:8516
[<00000000e5f3fea0>] tun_set_iff drivers/net/tun.c:2649 [inline]
[<00000000e5f3fea0>] __tun_chr_ioctl+0x2218/0x3d20 drivers/net/tun.c:2883
[<000000001b8ac127>] vfs_ioctl fs/ioctl.c:46 [inline]
[<000000001b8ac127>] do_vfs_ioctl+0x1a5/0x10e0 fs/ioctl.c:690
[<0000000079b269f8>] ksys_ioctl+0x89/0xa0 fs/ioctl.c:705
[<00000000de649beb>] __do_sys_ioctl fs/ioctl.c:712 [inline]
[<00000000de649beb>] __se_sys_ioctl fs/ioctl.c:710 [inline]
[<00000000de649beb>] __x64_sys_ioctl+0x74/0xb0 fs/ioctl.c:710
[<000000007ebded1e>] do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290
[<00000000db315d36>] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[<00000000115be9bb>] 0xffffffffffffffff
It should call kset_unregister to free 'dev->queues_kset'
in error path of register_queue_kobjects, otherwise will cause a mem leak.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 1d24eb4815d1 ("xps: Transmit Packet Steering")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.16: net_device pointer is called "net", confusingly]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | net/core/net-sysfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 777ac525ef27..cd332d0fa930 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -1219,6 +1219,9 @@ static int register_queue_kobjects(struct net_device *net) error: netdev_queue_update_kobjects(net, txq, 0); net_rx_queue_update_kobjects(net, rxq, 0); +#ifdef CONFIG_SYSFS + kset_unregister(net->queues_kset); +#endif return error; } |