forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

rlimits: switch more rlimit syscalls to do_prlimit

Browse source 
After we added more generic do_prlimit, switch sys_getrlimit to that.
Also switch compat handling, so we can get rid of ugly __user casts
and avoid setting process' address limit to kernel data and back.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
This commit is contained in:
Jiri Slaby 2010-05-04 11:28:25 +02:00
parent 5b41535aac
commit b95183453a
2 changed files with 11 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

17
kernel/compat.c
View file

@ -279,11 +279,6 @@ asmlinkage long compat_sys_setrlimit(unsigned int resource,
struct compat_rlimit __user *rlim)
{
struct rlimit r;
int ret;
mm_segment_t old_fs = get_fs ();
if (resource >= RLIM_NLIMITS)
return -EINVAL;
if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
__get_user(r.rlim_cur, &rlim->rlim_cur) ||
@ -294,10 +289,7 @@ asmlinkage long compat_sys_setrlimit(unsigned int resource,
r.rlim_cur = RLIM_INFINITY;
if (r.rlim_max == COMPAT_RLIM_INFINITY)
r.rlim_max = RLIM_INFINITY;
set_fs(KERNEL_DS);
ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
set_fs(old_fs);
return ret;
return do_prlimit(current, resource, &r, NULL);
}
#ifdef COMPAT_RLIM_OLD_INFINITY
@ -329,16 +321,13 @@ asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
#endif
asmlinkage long compat_sys_getrlimit (unsigned int resource,
asmlinkage long compat_sys_getrlimit(unsigned int resource,
struct compat_rlimit __user *rlim)
{
struct rlimit r;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
set_fs(old_fs);
ret = do_prlimit(current, resource, NULL, &r);
if (!ret) {
if (r.rlim_cur > COMPAT_RLIM_INFINITY)
r.rlim_cur = COMPAT_RLIM_INFINITY;