[arm-gnu] Bug in arm-2009q3-63 arm-none-linux-gnueabi glibc

[Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxx>]

Hello,

today I got a segmentation fault inside the glibc function times 
(sysdeps/unix/sysv/linux/times.c).
After some researches I found out that the return value from the syscall can 
be EFAULT even if buf is NULL which is totally legal. There is already a 
force_successful_syscall_return() statement in the kernel, but on arm this is 
not implemented.
So, when EFAULT is returned and buf is NULL the return value is a valid value. 
The is already a comment which says EFAULT and a valid return value can not be 
distinguished on some platforms. But the access check is senseless with a NULL 
pointer.
As far as I can see, this bug also is valid for the git master.

Best Regards
Alexander