Is this something you already know about? --b. DEBUG_LOCKS_WARN_ON(sem->owner != ((struct task_struct *)1UL)) WARNING: CPU: 1 PID: 1418 at kernel/locking/rwsem.c:217 up_read_non_owner+0x58/0x60 Modules linked in: rpcsec_gss_krb5 nfsv4 nfs nfsd auth_rpcgss nfs_acl lockd grace sunrpc CPU: 1 PID: 1418 Comm: kworker/1:2 Not tainted 4.16.0-09576-g38c23685b273 #1706 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-2.fc27 04/01/2014 Workqueue: nfsiod rpc_async_release [sunrpc] RIP: 0010:up_read_non_owner+0x58/0x60 RSP: 0018:ffffc900019efe20 EFLAGS: 00010282 RAX: 000000000000003e RBX: ffff880221246338 RCX: 0000000000000001 RDX: 0000000080000001 RSI: 0000000000000001 RDI: 00000000ffffffff RBP: ffff8802319a9000 R08: 0000000000000000 R09: ffffffff810ee1c9 R10: ffffc900019efe00 R11: 0000000000000000 R12: ffff880230515000 R13: ffff880232badb40 R14: 0000000000000000 R15: ffff88023fd1fec0 FS: 0000000000000000(0000) GS:ffff88023fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd79b9290c CR3: 0000000235fb8000 CR4: 00000000000406e0 Call Trace: nfs_async_unlink_release+0x2d/0x80 [nfs] rpc_free_task+0x2d/0x70 [sunrpc] process_one_work+0x1e8/0x650 worker_thread+0x3a/0x390 ? process_one_work+0x650/0x650 kthread+0x11e/0x140 ? kthread_create_on_node+0x40/0x40 ret_from_fork+0x3a/0x50 Code: ff b3 00 5b c3 e8 39 67 60 00 85 c0 74 df 8b 05 97 87 bd 02 85 c0 75 d5 48 c7 c6 b8 cc 4f 82 48 c7 c7 1b c4 4e 82 e8 98 be fa ff <0f> 0b eb be 0f 1f 40 00 66 66 66 66 90 53 48 8b 74 24 08 48 89 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
