On Tue, Mar 19, 2019 at 7:20 PM Meelis Roos <mroos@xxxxxxxx> wrote:
>
> Tried 5.1-rc1 on a bunch of sparcs, this hits all my sparcs with sun4v and mpt scsi.
>
> [ 2.733263] Fusion MPT base driver 3.04.20
> [ 2.742995] Copyright (c) 1999-2008 LSI Corporation
> [ 2.743052] Fusion MPT SAS Host driver 3.04.20
> [ 2.743881] mptbase: ioc0: Initiating bringup
> [ 3.737822] ioc0: LSISAS1064 A3: Capabilities={Initiator}
> [ 17.566584] scsi host0: ioc0: LSISAS1064 A3, FwRev=010a0000h, Ports=1, MaxQ=511, IRQ=27
> [ 17.595897] mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 0, phy 0, sas_addr 0x5000c5001799a45d
> [ 17.598465] Unable to handle kernel NULL pointer dereference
> [ 17.598623] tsk->{mm,active_mm}->context = 0000000000000000
> [ 17.598723] tsk->{mm,active_mm}->pgd = ffff800008802000
> [ 17.598774] \|/ ____ \|/
> [ 17.598774] "@'/ .. \`@"
> [ 17.598774] /_| \__/ |_\
> [ 17.598774] \__U_/
> [ 17.598894] swapper/0(1): Oops [#1]
> [ 17.598937] CPU: 12 PID: 1 Comm: swapper/0 Not tainted 5.1.0-rc1 #118
> [ 17.598994] TSTATE: 0000000080e01601 TPC: 00000000004483a8 TNPC: 00000000004483ac Y: 00000000 Not tainted
> [ 17.599086] TPC: <dma_4v_map_sg+0xe8/0x5c0>
You may use gdb to figure out what the NULL pointer points to:
gdb vmlinux
> l *(dma_4v_map_sg+0xe8)
Thanks,
Ming Lei
