linux-kernel - Re: [PATCH] net: Fix error handling in netdev_register

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Message-ID: <202511121347.b3f6c2a3-lkp@intel.com>
Date: Wed, 12 Nov 2025 13:59:49 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Ma Ke <make24@...as.ac.cn>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <netdev@...r.kernel.org>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <horms@...nel.org>, <sdf@...ichev.me>,
	<atenart@...nel.org>, <kuniyu@...gle.com>, <yajun.deng@...ux.dev>,
	<gregkh@...e.de>, <ebiederm@...ssion.com>, <linux-kernel@...r.kernel.org>,
	<akpm@...ux-foundation.org>, Ma Ke <make24@...as.ac.cn>,
	<stable@...r.kernel.org>, <oliver.sang@...el.com>
Subject: Re: [PATCH] net: Fix error handling in netdev_register_kobject


Hello,

kernel test robot noticed "BUG_kmalloc-#k:Object_corrupt" on:

commit: 6e383382971f4573e29f0e85c6e5667c8f5f46d6 ("[PATCH] net: Fix error handling in netdev_register_kobject")
url: https://github.com/intel-lab-lkp/linux/commits/Ma-Ke/net-Fix-error-handling-in-netdev_register_kobject/20251107-160348
base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git 6fc33710cd6c55397e606eeb544bdf56ee87aae5
patch link: https://lore.kernel.org/all/20251107080117.15099-1-make24@iscas.ac.cn/
patch subject: [PATCH] net: Fix error handling in netdev_register_kobject

in testcase: boot

config: i386-randconfig-014-20251110
compiler: gcc-14
test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

(please refer to attached dmesg/kmsg for entire log/backtrace)



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202511121347.b3f6c2a3-lkp@intel.com


[  OK  ] Started /etc/rc.local Compatibility.
LKP: ttyS0: 250: skip deploy intel ucode as no ucode is specified
[   15.199659] rc.local[250]: LKP: stdout: 250: skip deploy intel ucode as no ucode is specified
[   15.508990][    T1] [Poison overwritten] 0xf5e12370-0xf5e12370 @offset=9072. First byte 0x6a instead of 0x6b
[   15.511968][    T1] =============================================================================
[   15.514232][    T1] BUG kmalloc-2k (Tainted: G S                 ): Object corrupt
[   15.516308][    T1] -----------------------------------------------------------------------------
[   15.516308][    T1]
[   15.519187][    T1] Allocated in alloc_netdev_mqs+0x7d/0x470 age=517 cpu=1 pid=191
[   15.521218][    T1]  __slab_alloc+0x53/0x80
[   15.522561][    T1]  __kvmalloc_node_noprof (kbuild/src/consumer/mm/slub.c:4846 kbuild/src/consumer/mm/slub.c:5268 kbuild/src/consumer/mm/slub.c:5641 kbuild/src/consumer/mm/slub.c:7100)


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251112/202511121347.b3f6c2a3-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki