After mounting and unmounting a 4.1 partition with client and server both 2.6.32-rc3, I see the following NULL dereference on the client. I think the only cache lookup there is in unix_gid_find(). Hm. Maybe it's trying to defer a request without a defer method set? Of course there's no point to the client's callback server doing this upcall at all. --b. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<(null)>] (null) *pde = 00000000 Oops: 0000 [#1] PREEMPT last sysfs file: /sys/kernel/uevent_seqnum Modules linked in: Pid: 3108, comm: nfsv4.1-svc Tainted: G W (2.6.32-rc3 #144) EIP: 0060:[<00000000>] EFLAGS: 00010293 CPU: 0 EIP is at 0x0 EAX: c73edd7c EBX: c5d2f8e8 ECX: 00000000 EDX: 00000001 ESI: c5d2f8d8 EDI: 4aca7522 EBP: c71b1e80 ESP: c71b1e58 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 Process nfsv4.1-svc (pid: 3108, ti=c71b0000 task=c4800020 task.ti=c71b0000) Stack: c176f01a c71b1e80 c176f695 c71b1e90 c73edd7c c1aca8a0 fffffff5 c73ed000 <0> c5d2f8d8 00000000 c71b1eb8 c1768dcf c71b1f30 00000fc4 c1aca7bc 00000246 <0> c17689e2 00000001 c1aca7bc 00000000 c17c0158 c1aca944 c73ed0c8 00000000 Call Trace: [<c176f01a>] ? cache_check+0xea/0x350 [<c176f695>] ? sunrpc_cache_lookup+0x125/0x140 [<c1768dcf>] ? svcauth_unix_accept+0x15f/0x2e0 [<c17689e2>] ? svc_authenticate+0x142/0x1a0 [<c17c0158>] ? sub_preempt_count+0x8/0x90 [<c17689f7>] ? svc_authenticate+0x157/0x1a0 [<c17bd877>] ? _spin_unlock_irq+0x27/0x50 [<c1764cd3>] ? svc_process_common+0x3f3/0x630 [<c1764fd2>] ? bc_svc_process+0xc2/0x100 [<c1059d0b>] ? trace_hardirqs_on+0xb/0x10 [<c1213487>] ? nfs41_callback_svc+0x87/0x120 [<c1049c50>] ? autoremove_wake_function+0x0/0x50 [<c1213400>] ? nfs41_callback_svc+0x0/0x120 [<c10499a4>] ? kthread+0x74/0x80 [<c1049930>] ? kthread+0x0/0x80 [<c100363b>] ? kernel_thread_helper+0x7/0x10 Code: Bad EIP value. EIP: [<00000000>] 0x0 SS:ESP 0068:c71b1e58 CR2: 0000000000000000 ---[ end trace 39933fa1a06d9d4b ]--- -- 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
