Re: [PATCH v3] module: Fix display of wrong module .text address

[Thomas-Mich Richter]

On 04/18/2018 09:17 AM, Tobin C. Harding wrote:
> On Wed, Apr 18, 2018 at 09:14:36AM +0200, Thomas Richter wrote:
>> Reading file /proc/modules shows the correct address:
>> [root@s35lp76 ~]# cat /proc/modules | egrep '^qeth_l2'
>> qeth_l2 94208 1 - Live 0x000003ff80401000
>>
>> and reading file /sys/module/qeth_l2/sections/.text
>> [root@s35lp76 ~]# cat /sys/module/qeth_l2/sections/.text
>> 0x0000000018ea8363
>> displays a random address.
>>
>> This breaks the perf tool which uses this address on s390
>> to calculate start of .text section in memory.
>>
>> Fix this by printing the correct (unhashed) address.
>>
>> Thanks to Jessica Yu for helping on this.
>>
>> Fixes: ef0010a30935 ("vsprintf: don't use 'restricted_pointer()' when not restricting")
>> Cc: <stable@xxxxxxxxxxxxxxx> # v4.15+
>> Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
>> Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
>> Cc: Jessica Yu <jeyu@xxxxxxxxxx>
>> ---
> 
> What's changed in each version please?
> 
> 
> thanks,
> Tobin.
> 

V2: Changed sprintf format string from %#lx to 0x%px (suggested by Kees Cook).
V3: Changed sprintf agrument from 0 to NULL to avoid sparse warning.

-- 
Thomas Richter, Dept 3303, IBM LTC Boeblingen Germany
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