Re: syscall - "comm" field truncated
On 16/04/06, Paul Moore wrote:
On Wed, Apr 6, 2016 at 9:53 AM, Lev Stipakov
<lstipakov(a)gmail.com> wrote:
> Hello,
>
> Sometimes audit of "execve" syscall generates events with truncated
"comm"
> values, for example:
>
> type=SYSCALL msg=audit(1459950426.152:1097081): arch=c000003e syscall=59
> success=yes exit=0 a0=35bae3e a1=1bc0cf0 a2=2b09280 a3=58c items=2 ppid=2183
> pid=26566 auid=4294967295 uid=1001 gid=1001 euid=1001
> suid=1001 fsuid=1001 egid=1001 sgid=1001 fsgid=1001 tty=(none)
> ses=4294967295 comm="gnome-calculato"
exe="/usr/bin/gnome-calculator"
>
> Why "comm" is "gnome-calculato" and not
"/usr/bin/gnome-calculator" ?
This is due to a limitation in how the kernel records the comm field
and isn't likely to change.
It is set in the kernel, in file include/linux/sched.h,
struct task_struct, member comm, with length TASK_COMM_LEN which is 16.
Changing it would break all kinds of stuff, so as was mentioned,
PROCTITLE is used to get the kind of information you seek.
paul moore
- RGB
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Richard Guy Briggs <rbriggs(a)redhat.com>
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