On Tue, Jan 15, 2013 at 12:10 AM, Fengguang Wu <fengguang...@intel.com> wrote:
> 7b6d45c211a401a9bdeebfa96f8a4c811bd3eeaf is the first bad commit
>
> commit 7b6d45c211a401a9bdeebfa96f8a4c811bd3eeaf
> Author: Bill Pemberton <wf...@virginia.edu>
> Date: Thu Sep 20 16:55:28 2012 -0400
>
> staging: dgrp: add dgrp to the build
>
> Kconfig and Makefile changes to add dgrp to the build system.
>
> Signed-off-by: Bill Pemberton <wf...@virginia.edu>
> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>
> [ 7.904899] i2c-core: driver [isl29018] registered
> [ 7.906424] i2c-core: driver [tsl2583] registered
> [ 7.908289] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000040
> [ 7.909055] IP: [<ffffffff814f5147>] register_proc_table+0xe0/0x26f
> [ 7.909055] PGD 0
> [ 7.909055] Oops: 0000 [#1] SMP
> [ 7.909055] CPU 0
> [ 7.909055] Pid: 1, comm: swapper/0 Not tainted 3.8.0-rc3-00051-gc83dcb9
> #16
> [ 7.909055] RIP: 0010:[<ffffffff814f5147>] [<ffffffff814f5147>]
> register_proc_table+0xe0/0x26f
> [ 7.909055] RSP: 0000:ffff88000d0c1e78 EFLAGS: 00010246
> [ 7.909055] RAX: 0000000000000003 RBX: 0000000000000000 RCX:
> 0000000000000003
> [ 7.909055] RDX: 0000000000000002 RSI: 0000000000000000 RDI:
> ffffffff81989648
> [ 7.909055] RBP: ffff88000d0c1eb8 R08: 0000000000000000 R09:
> 0000000000000000
> [ 7.909055] R10: ffff88000f4fed68 R11: ffff88000f4fecb8 R12:
> ffffffff81a9f008
> [ 7.909055] R13: 0000000000000000 R14: ffffffff82b3a710 R15:
> ffffffff81989644
> [ 7.909055] FS: 0000000000000000(0000) GS:ffff88000da00000(0000)
> knlGS:0000000000000000
> [ 7.909055] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 7.909055] CR2: 0000000000000040 CR3: 00000000019a4000 CR4:
> 00000000000006f0
> [ 7.909055] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 7.927424] tsc: Refined TSC clocksource calibration: 2666.662 MHz
>
> Thanks,
> Fengguang
Hello Fengguang,
Will you try the patch below please...
diff --git a/drivers/staging/dgrp/dgrp_specproc.c
b/drivers/staging/dgrp/dgrp_specproc.c
index c214078..f5845a7 100644
--- a/drivers/staging/dgrp/dgrp_specproc.c
+++ b/drivers/staging/dgrp/dgrp_specproc.c
@@ -231,6 +231,8 @@ static void register_proc_table(struct
dgrp_proc_entry *table,
if (table == NULL)
return;
+ if (root == NULL)
+ return;
for (; table->id; table++) {
/* Can't do anything without a proc name. */
Applies on current linus's head at 406089d01562f1e2bf9f089fd7637009ebaad589.
I am thinking of the case where you dont have any proc entry.
thanks,
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