• Bryan Schumaker's avatar
    SUNRPC: Set alloc_slot for backchannel tcp ops · 84e28a30
    Bryan Schumaker authored
    f39c1bfb (SUNRPC: Fix a UDP transport
    regression) introduced the "alloc_slot" function for xprt operations,
    but never created one for the backchannel operations.  This patch fixes
    a null pointer dereference when mounting NFS over v4.1.
    
    Call Trace:
     [<ffffffffa0207957>] ? xprt_reserve+0x47/0x50 [sunrpc]
     [<ffffffffa02023a4>] call_reserve+0x34/0x60 [sunrpc]
     [<ffffffffa020e280>] __rpc_execute+0x90/0x400 [sunrpc]
     [<ffffffffa020e61a>] rpc_async_schedule+0x2a/0x40 [sunrpc]
     [<ffffffff81073589>] process_one_work+0x139/0x500
     [<ffffffff81070e70>] ? alloc_worker+0x70/0x70
     [<ffffffffa020e5f0>] ? __rpc_execute+0x400/0x400 [sunrpc]
     [<ffffffff81073d1e>] worker_thread+0x15e/0x460
     [<ffffffff8145c839>] ? preempt_schedule+0x49/0x70
     [<ffffffff81073bc0>] ? rescuer_thread+0x230/0x230
     [<ffffffff81079603>] kthread+0x93/0xa0
     [<ffffffff81465d04>] kernel_thread_helper+0x4/0x10
     [<ffffffff81079570>] ? kthread_freezable_should_stop+0x70/0x70
     [<ffffffff81465d00>] ? gs_change+0x13/0x13
    Signed-off-by: default avatarBryan Schumaker <bjschuma@netapp.com>
    Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
    84e28a30
xprtsock.c 78.6 KB