diff options
| author | Jiri Slaby <jirislaby@gmail.com> | 2010-05-04 11:28:25 +0200 |
|---|---|---|
| committer | Jiri Slaby <jirislaby@gmail.com> | 2010-07-16 09:48:48 +0200 |
| commit | b95183453af2ed14a5c7027e58049c9fd17e92ce (patch) | |
| tree | 8db2687b9508de182615915c7df1edf26d08638c /kernel/compat.c | |
| parent | 5b41535aac0c07135ff6a4c5c2ae115d1c20c0bc (diff) | |
| download | lwn-b95183453af2ed14a5c7027e58049c9fd17e92ce.tar.gz lwn-b95183453af2ed14a5c7027e58049c9fd17e92ce.zip | |
rlimits: switch more rlimit syscalls to do_prlimit
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>
Diffstat (limited to 'kernel/compat.c')
| -rw-r--r-- | kernel/compat.c | 17 |
1 files changed, 3 insertions, 14 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index 5adab05a3172..e167efce8423 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -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; |