netdev - Re: [PATCH net] netdevsim: fix memory leak in nsim_bus_dev

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Date:   Thu, 27 Oct 2022 18:00:18 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     shaozhengchao <shaozhengchao@...wei.com>
Cc:     netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, jiri@...lanox.com,
        weiyongjun1@...wei.com, yuehaibing@...wei.com
Subject: Re: [PATCH net] netdevsim: fix memory leak in nsim_bus_dev_new()

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Wed, 26 Oct 2022 09:54:05 +0800 you wrote:
> If device_register() failed in nsim_bus_dev_new(), the value of reference
> in nsim_bus_dev->dev is 1. obj->name in nsim_bus_dev->dev will not be
> released.
> 
> unreferenced object 0xffff88810352c480 (size 16):
>   comm "echo", pid 5691, jiffies 4294945921 (age 133.270s)
>   hex dump (first 16 bytes):
>     6e 65 74 64 65 76 73 69 6d 31 00 00 00 00 00 00  netdevsim1......
>   backtrace:
>     [<000000005e2e5e26>] __kmalloc_node_track_caller+0x3a/0xb0
>     [<0000000094ca4fc8>] kvasprintf+0xc3/0x160
>     [<00000000aad09bcc>] kvasprintf_const+0x55/0x180
>     [<000000009bac868d>] kobject_set_name_vargs+0x56/0x150
>     [<000000007c1a5d70>] dev_set_name+0xbb/0xf0
>     [<00000000ad0d126b>] device_add+0x1f8/0x1cb0
>     [<00000000c222ae24>] new_device_store+0x3b6/0x5e0
>     [<0000000043593421>] bus_attr_store+0x72/0xa0
>     [<00000000cbb1833a>] sysfs_kf_write+0x106/0x160
>     [<00000000d0dedb8a>] kernfs_fop_write_iter+0x3a8/0x5a0
>     [<00000000770b66e2>] vfs_write+0x8f0/0xc80
>     [<0000000078bb39be>] ksys_write+0x106/0x210
>     [<00000000005e55a4>] do_syscall_64+0x35/0x80
>     [<00000000eaa40bbc>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
> 
> [...]

Here is the summary with links:
  - [net] netdevsim: fix memory leak in nsim_bus_dev_new()
    https://git.kernel.org/netdev/net/c/cf2010aa1c73

You are awesome, thank you!
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