Re: [uml-user] invalid /proc/PID/exe in UML processes

[Richard W. <ri...@no...>]

Am 02.06.2014 22:42, schrieb Nalli, Sanketh:
> Nope, but here is some bootlog

Hmm, I have no idea so far.

Applications running under valgrind or other debuggers suffered from the issue
that /proc/pid/exe is empty.

> The host does not have skas3 patch
> Do you think that is the problem ?

Nope. SKAS0 works fine.

> Which host shd I use that already has this patch
> (I mean I cud patch the host myself but if there is one
> Already present, that is good !)
> 
> Core dump limits :
>         soft - 0
>         hard - NONE
> Checking that ptrace can change system call numbers...OK
> Checking syscall emulation patch for ptrace...OK
> Checking advanced syscall emulation patch for ptrace...OK
> Checking for tmpfs mount on /dev/shm...nothing mounted on /dev/shm
> Checking PROT_EXEC mmap in /tmp/...OK
> Checking for new_mm and switch_mm support in the host:
>         /proc/self/mm ... Failed -
> No such file or directory
> Checking for the skas3 patch in the host:
>   - /proc/mm...not found: No such file or directory
>   - PTRACE_FAULTINFO...not found
>   - PTRACE_LDT...not found
> UML running in SKAS0 mode
> Adding 20606976 bytes to physical memory to account for exec-shield gap
> Linux version 2.6.24-g91525300-dirty (jd...@am...) (gcc version 4.1.1 20070105 (Red Hat 4.1.1-51)) #1 Mon Jan 28 12:03:41 EST 2008

Wow. This UML is horrible old.

Thanks,
//richard