> On Fri, Sep 24, 2010 at 09:10:37AM +0300, Meelis Roos wrote:
> > 2.6.36-rc5+git as of yesterday:
> >
> > LD .tmp_vmlinux1
> > security/built-in.o: In function `tomoyo_supervisor':(.text+0xea98): undefined reference to `sys_getpid'
> > security/built-in.o: In function `tomoyo_supervisor':(.text+0xeab0): undefined reference to `sys_getpid'
> > security/built-in.o: In function `tomoyo_supervisor':(.text+0xeac0): undefined reference to `sys_getppid'
> > security/built-in.o: In function `tomoyo_supervisor':(.text+0xeac4): undefined reference to `sys_getppid'
> >
> > Seems alpha has different mechanisms for using these syscalls from
> > inside the kernel?
>
> The real problem is that kernel code should never call system calls.
> The correct fix is to get rid of this abuse.
I agree.
The problem function is here.
---------------------------------------------------------------
static char *tomoyo_print_header(struct tomoyo_request_info *r)
{
struct timeval tv;
const pid_t gpid = task_pid_nr(current);
static const int tomoyo_buffer_len = 4096;
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
if (!buffer)
return NULL;
do_gettimeofday(&tv);
snprintf(buffer, tomoyo_buffer_len - 1,
"#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
" task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
" egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
tv.tv_sec, r->profile, tomoyo_mode[r->mode], gpid,
(pid_t) sys_getpid(), (pid_t) sys_getppid(),
current_uid(), current_gid(), current_euid(),
current_egid(), current_suid(), current_sgid(),
current_fsuid(), current_fsgid());
return buffer;
}
---------------------------------------------------------------
It has alread used task_pid_nr(). there is no reason to avoid
to call task_tgid_vnr() directly. I bet.
IOW, I think tomoyo can fix this issue easily.
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