FYI, we noticed the following commit (built with gcc-7): commit: 6f4f7839e92414a9ab56afbe3023c32abe4cbe59 ("auth_gss: fix deadlock that blocks rpcsec_gss_exit_net when use-gss-proxy==1") grep: /cephfs/kbuild/commit-list/aaron/aaron:batch_size-phas1_1: in testcase: trinity with following parameters: runtime: 300s test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 2G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +-------------------------------------------------+------------+------------+ | | 9cf7a1b68c | 6f4f7839e9 | +-------------------------------------------------+------------+------------+ | boot_successes | 8 | 2 | | boot_failures | 0 | 4 | | WARNING:at_fs/proc/generic.c:#remove_proc_entry | 0 | 4 | | EIP:remove_proc_entry | 0 | 4 | +-------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 101.145547] WARNING: CPU: 1 PID: 7 at fs/proc/generic.c:683 remove_proc_entry+0xd7/0xeb [ 101.146501] CPU: 1 PID: 7 Comm: kworker/u4:0 Tainted: G T 5.1.0-rc3-00031-g6f4f783 #32 [ 101.147428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 101.148272] Workqueue: netns cleanup_net [ 101.148680] EIP: remove_proc_entry+0xd7/0xeb [ 101.149118] Code: 9e f5 ff ff 85 c0 74 27 89 d8 e8 93 f5 ff ff ff 70 24 ff 73 24 8b 43 1c ff 70 24 68 c0 6b 00 42 68 e4 0f 68 42 e8 0e bb e8 ff <0f> 0b 83 c4 14 89 d8 e8 4d fd ff ff 8d 65 f4 5b 5e 5f 5d c3 66 66 [ 101.150993] EAX: 0000005b EBX: bf699008 ECX: 80000001 EDX: 4105b0f6 [ 101.151628] ESI: 4287cbaa EDI: bf928ee0 EBP: 4033deec ESP: 4033dec4 [ 101.152263] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 101.152988] CR0: 80050033 CR2: 080f3354 CR3: 7f4fe000 CR4: 00040690 [ 101.153617] DR0: 36cde000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 101.154247] DR6: fffe0ff0 DR7: 00000600 [ 101.154635] Call Trace: [ 101.154890] ? sunrpc_exit_net+0x5d/0x69 [ 101.155289] ? ops_exit_list+0x2a/0x4c [ 101.155670] ? cleanup_net+0x165/0x203 [ 101.156052] ? process_one_work+0x209/0x361 [ 101.156481] ? worker_thread+0x16b/0x20c [ 101.156879] ? kthread+0xdd/0xdf [ 101.157212] ? process_scheduled_works+0x27/0x27 [ 101.157684] ? queuing_blocked+0x39/0x39 [ 101.158083] ? ret_from_fork+0x19/0x30 [ 101.158470] ---[ end trace a2b4903886cdf4ab ]--- To reproduce: # build kernel cd linux cp config-5.1.0-rc3-00031-g6f4f783 .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 olddefconfig make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 modules_prepare make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 SHELL=/bin/bash make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, lkp