BUG at net/rxrpc/ar-ack.c:381!

[Anton Blanchard]

Hi,

I was testing AFS on ppc64 (2.6.31-rc5-tip) and hit the following assert in
rxrpc_rotate_tx_window:

kernel BUG at net/rxrpc/ar-ack.c:381!

Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=128 NUMA pSeries
Modules linked in: kafs fcrypt rxkad pcbc af_rxrpc fuse ib_ehca ib_core [last unloaded: kafs]
NIP: d00000000cd86cfc LR: d00000000cd86cf8 CTR: 0000000000000001
REGS: c000000768eb3860 TRAP: 0700   Not tainted  (2.6.31-rc5-tip)
MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 28000084  XER: 20000020
TASK = c000000768dc8000[4571] 'krxrpcd/0' THREAD: c000000768eb0000 CPU: 0
GPR00: d00000000cd86cf8 c000000768eb3ae0 d00000000cdb36d0 000000000000001a 
GPR04: 0000000000000000 ffffffffffffffff 0000000000000003 d00000000cd9db05 
GPR08: c000000000b171e8 c00000000097cef0 c000000000b176f0 0000000000000001 
GPR12: 0000000028000082 c000000000afb200 c0000000008466a4 c0000007659d0d70 
GPR16: 0000000000000000 c00000000096b2f0 0000000000000000 c0000007659d0e50 
GPR20: 0000000000000000 0000000000000000 c000000768eb0000 c000000769e02398 
GPR24: c000000769e02388 c0000007659d0e58 0000000000000001 0000000000000001 
GPR28: 0000000000000000 c0000007659d0c80 d00000000cdb1868 c000000768eb3ae0 
NIP [d00000000cd86cfc] .rxrpc_rotate_tx_window+0xec/0x198 [af_rxrpc]
LR [d00000000cd86cf8] .rxrpc_rotate_tx_window+0xe8/0x198 [af_rxrpc]
Call Trace:
[c000000768eb3ae0] [d00000000cd86cf8] .rxrpc_rotate_tx_window+0xe8/0x198 [af_rxrpc] (unreliable)
[c000000768eb3b80] [d00000000cd87d14] .rxrpc_process_call+0x528/0x20d0 [af_rxrpc]
[c000000768eb3db0] [c00000000009e514] .worker_thread+0x260/0x3b0
[c000000768eb3ec0] [c0000000000a57b8] .kthread+0xbc/0xc8
[c000000768eb3f90] [c00000000002fc98] .kernel_thread+0x54/0x70

Anton