Hi, kernel 3.18.55 compilation fails with this error:
kernel/fork.c: In function ‘dup_task_struct’:
kernel/fork.c:341:2: error: implicit declaration of function
‘get_random_long’ [-Werror=implicit-function-declaration]
tsk->stack_canary = get_random_long();
Corrected by adding the declaration to include/linux/random.h line 26 :
unsigned long get_random_long(void);
Sorry, I really can't understand how to generate a patch from a tagged
release, my git-fu is far too low...
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Emmanuel Florac | Direction technique
| Intellique
| <[email protected]>
| +33 1 78 94 84 02
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On 06/02/17 06:30, Emmanuel Florac wrote:
> Hi, kernel 3.18.55 compilation fails with this error:
>
> kernel/fork.c: In function ‘dup_task_struct’:
> kernel/fork.c:341:2: error: implicit declaration of function
> ‘get_random_long’ [-Werror=implicit-function-declaration]
> tsk->stack_canary = get_random_long();
>
> Corrected by adding the declaration to include/linux/random.h line 26 :
>
> unsigned long get_random_long(void);
>
> Sorry, I really can't understand how to generate a patch from a tagged
> release, my git-fu is far too low...
>
Should be fixed in 3.18.56 by this commit:
commit 2bc281ebacf969770597fad415547016f0457b53
Author: Greg Kroah-Hartman <[email protected]>
Date: Sat May 27 12:09:37 2017 +0200
Revert "stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms"
This reverts commit 609a3e81550b0b4ea87197b0f59455a7bcff975a which is
commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 upstream.
It shouldn't have been backported to 3.18, as we do not have
get_random_long() in that kernel tree.
--
~Randy