On Fri, 2019-03-08 at 12:48 +0800, kernel test robot wrote: > [ 1.855169] spin_lock-torture: lock_torture_stats task started > [ 2.565387] workingset: timestamp_bits=14 max_order=17 bucket_order=3 > [ 2.567522] NFS: Registering the id_resolver key type > [ 2.568478] Key type id_resolver registered > [ 2.569072] Key type id_legacy registered > [ 2.570808] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:995 > lockdep_register_key+0x37/0x386 > [ 2.571658] CPU: 0 PID: 1 Comm: swapper Not tainted > 5.0.0-rc8-00054-g669de8b #496 > [ 2.571658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.10.2-1 04/01/2014 > [ 2.571658] EIP: lockdep_register_key+0x37/0x386 > [ 2.571658] Code: 20 45 65 94 01 83 15 24 45 65 94 00 81 fe 00 00 80 92 72 > 2e 81 fe 00 d0 88 95 73 26 83 05 40 45 65 94 01 83 15 44 45 65 94 00 <0f> 0b > 83 05 48 45 65 94 01 83 15 4c 45 65 94 00 > 83 c4 1c 5b 5e 5f > [ 2.571658] EAX: 9586d254 EBX: 9586d1c0 ECX: 944f9cd8 EDX: 00000000 > [ 2.571658] ESI: 9586d254 EDI: 9586d274 EBP: 975a9ee4 ESP: 975a9ebc > [ 2.571658] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210246 > [ 2.571658] CR0: 80050033 CR2: 00000000 CR3: 1c4a5000 CR4: 00340690 > [ 2.571658] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 > [ 2.571658] DR6: fffe0ff0 DR7: 00000400 > [ 2.571658] Call Trace: > [ 2.571658] ? debug_mutex_init+0x4b/0x63 > [ 2.571658] ? __mutex_init+0x59/0x6c > [ 2.571658] alloc_workqueue+0x227/0x84e > [ 2.571658] ? proc_create+0x3e/0x52 > [ 2.571658] ? trace_event_define_fields_smb3_rw_err_class+0x1b9/0x1b9 > [ 2.571658] init_cifs+0x159/0x72f > [ 2.571658] do_one_initcall+0x2c4/0x6bf > [ 2.571658] kernel_init_freeable+0x6ef/0x841 > [ 2.571658] ? rest_init+0x473/0x473 > [ 2.571658] kernel_init+0x1e/0x26b > [ 2.571658] ? schedule_tail_wrapper+0x9/0xc > [ 2.571658] ret_from_fork+0x1e/0x28 > [ 2.571658] irq event stamp: 410062 > [ 2.571658] hardirqs last enabled at (410061): [<93a2ac73>] > _raw_spin_unlock_irqrestore+0x133/0x17e > [ 2.571658] hardirqs last disabled at (410062): [<92801bca>] > trace_hardirqs_off_thunk+0xc/0x10 > [ 2.571658] softirqs last enabled at (409970): [<93a2da14>] > __do_softirq+0x904/0xa1d > [ 2.571658] softirqs last disabled at (409965): [<92813eb9>] > do_softirq_own_stack+0x3d/0x51 > [ 2.571658] ---[ end trace c4eabde80fbbdbf0 ]--- > [ 3.753943] String selftests succeeded
The following patch should fix this: [PATCH] kernel/wq: Fix a alloc_workqueue() error path. See also https://lore.kernel.org/lkml/20190303220046.29448-1-bvanass...@acm.org/ Bart.
