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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 11:54:55 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 11:54:55 -0800
commit93f30c73ecd0281cf3685ef0e4e384980a176176 (patch)
treebd272334a0dbd258c08b5b2237e8bf5e17ce7255 /fs/select.c
parent06ede5f6086757f746b7be860ae76137f4e95032 (diff)
parent96271654f55c74ff7325fbdfc535466c9deb0ce6 (diff)
downloadlinux-93f30c73ecd0281cf3685ef0e4e384980a176176.tar.gz
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull compat and uaccess updates from Al Viro: - {get,put}_compat_sigset() series - assorted compat ioctl stuff - more set_fs() elimination - a few more timespec64 conversions - several removals of pointless access_ok() in places where it was followed only by non-__ variants of primitives * 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (24 commits) coredump: call do_unlinkat directly instead of sys_unlink fs: expose do_unlinkat for built-in callers ext4: take handling of EXT4_IOC_GROUP_ADD into a helper, get rid of set_fs() ipmi: get rid of pointless access_ok() pi433: sanitize ioctl cxlflash: get rid of pointless access_ok() mtdchar: get rid of pointless access_ok() r128: switch compat ioctls to drm_ioctl_kernel() selection: get rid of field-by-field copyin VT_RESIZEX: get rid of field-by-field copyin i2c compat ioctls: move to ->compat_ioctl() sched_rr_get_interval(): move compat to native, get rid of set_fs() mips: switch to {get,put}_compat_sigset() sparc: switch to {get,put}_compat_sigset() s390: switch to {get,put}_compat_sigset() ppc: switch to {get,put}_compat_sigset() parisc: switch to {get,put}_compat_sigset() get_compat_sigset() get rid of {get,put}_compat_itimerspec() io_getevents: Use timespec64 to represent timeouts ...
Diffstat (limited to 'fs/select.c')
-rw-r--r--fs/select.c68
1 files changed, 26 insertions, 42 deletions
diff --git a/fs/select.c b/fs/select.c
index 063067e606ca..6de493bb42a4 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -292,8 +292,7 @@ static int poll_select_copy_remaining(struct timespec64 *end_time,
void __user *p,
int timeval, int ret)
{
- struct timespec64 rts64;
- struct timespec rts;
+ struct timespec64 rts;
struct timeval rtv;
if (!p)
@@ -306,23 +305,22 @@ static int poll_select_copy_remaining(struct timespec64 *end_time,
if (!end_time->tv_sec && !end_time->tv_nsec)
return ret;
- ktime_get_ts64(&rts64);
- rts64 = timespec64_sub(*end_time, rts64);
- if (rts64.tv_sec < 0)
- rts64.tv_sec = rts64.tv_nsec = 0;
+ ktime_get_ts64(&rts);
+ rts = timespec64_sub(*end_time, rts);
+ if (rts.tv_sec < 0)
+ rts.tv_sec = rts.tv_nsec = 0;
- rts = timespec64_to_timespec(rts64);
if (timeval) {
if (sizeof(rtv) > sizeof(rtv.tv_sec) + sizeof(rtv.tv_usec))
memset(&rtv, 0, sizeof(rtv));
- rtv.tv_sec = rts64.tv_sec;
- rtv.tv_usec = rts64.tv_nsec / NSEC_PER_USEC;
+ rtv.tv_sec = rts.tv_sec;
+ rtv.tv_usec = rts.tv_nsec / NSEC_PER_USEC;
if (!copy_to_user(p, &rtv, sizeof(rtv)))
return ret;
- } else if (!copy_to_user(p, &rts, sizeof(rts)))
+ } else if (!put_timespec64(&rts, p))
return ret;
/*
@@ -705,17 +703,15 @@ static long do_pselect(int n, fd_set __user *inp, fd_set __user *outp,
const sigset_t __user *sigmask, size_t sigsetsize)
{
sigset_t ksigmask, sigsaved;
- struct timespec ts;
- struct timespec64 ts64, end_time, *to = NULL;
+ struct timespec64 ts, end_time, *to = NULL;
int ret;
if (tsp) {
- if (copy_from_user(&ts, tsp, sizeof(ts)))
+ if (get_timespec64(&ts, tsp))
return -EFAULT;
- ts64 = timespec_to_timespec64(ts);
to = &end_time;
- if (poll_select_set_timeout(to, ts64.tv_sec, ts64.tv_nsec))
+ if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
return -EINVAL;
}
@@ -1052,12 +1048,11 @@ SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds,
size_t, sigsetsize)
{
sigset_t ksigmask, sigsaved;
- struct timespec ts;
- struct timespec64 end_time, *to = NULL;
+ struct timespec64 ts, end_time, *to = NULL;
int ret;
if (tsp) {
- if (copy_from_user(&ts, tsp, sizeof(ts)))
+ if (get_timespec64(&ts, tsp))
return -EFAULT;
to = &end_time;
@@ -1103,10 +1098,10 @@ SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds,
#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
static
-int compat_poll_select_copy_remaining(struct timespec *end_time, void __user *p,
+int compat_poll_select_copy_remaining(struct timespec64 *end_time, void __user *p,
int timeval, int ret)
{
- struct timespec ts;
+ struct timespec64 ts;
if (!p)
return ret;
@@ -1118,8 +1113,8 @@ int compat_poll_select_copy_remaining(struct timespec *end_time, void __user *p,
if (!end_time->tv_sec && !end_time->tv_nsec)
return ret;
- ktime_get_ts(&ts);
- ts = timespec_sub(*end_time, ts);
+ ktime_get_ts64(&ts);
+ ts = timespec64_sub(*end_time, ts);
if (ts.tv_sec < 0)
ts.tv_sec = ts.tv_nsec = 0;
@@ -1132,12 +1127,7 @@ int compat_poll_select_copy_remaining(struct timespec *end_time, void __user *p,
if (!copy_to_user(p, &rtv, sizeof(rtv)))
return ret;
} else {
- struct compat_timespec rts;
-
- rts.tv_sec = ts.tv_sec;
- rts.tv_nsec = ts.tv_nsec;
-
- if (!copy_to_user(p, &rts, sizeof(rts)))
+ if (!compat_put_timespec64(&ts, p))
return ret;
}
/*
@@ -1195,7 +1185,7 @@ int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
*/
static int compat_core_sys_select(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
- struct timespec *end_time)
+ struct timespec64 *end_time)
{
fd_set_bits fds;
void *bits;
@@ -1268,7 +1258,7 @@ COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,
compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
struct compat_timeval __user *, tvp)
{
- struct timespec end_time, *to = NULL;
+ struct timespec64 end_time, *to = NULL;
struct compat_timeval tv;
int ret;
@@ -1312,14 +1302,12 @@ static long do_compat_pselect(int n, compat_ulong_t __user *inp,
struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
compat_size_t sigsetsize)
{
- compat_sigset_t ss32;
sigset_t ksigmask, sigsaved;
- struct compat_timespec ts;
- struct timespec end_time, *to = NULL;
+ struct timespec64 ts, end_time, *to = NULL;
int ret;
if (tsp) {
- if (copy_from_user(&ts, tsp, sizeof(ts)))
+ if (compat_get_timespec64(&ts, tsp))
return -EFAULT;
to = &end_time;
@@ -1330,9 +1318,8 @@ static long do_compat_pselect(int n, compat_ulong_t __user *inp,
if (sigmask) {
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
- if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+ if (get_compat_sigset(&ksigmask, sigmask))
return -EFAULT;
- sigset_from_compat(&ksigmask, &ss32);
sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
@@ -1381,14 +1368,12 @@ COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
unsigned int, nfds, struct compat_timespec __user *, tsp,
const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
{
- compat_sigset_t ss32;
sigset_t ksigmask, sigsaved;
- struct compat_timespec ts;
- struct timespec end_time, *to = NULL;
+ struct timespec64 ts, end_time, *to = NULL;
int ret;
if (tsp) {
- if (copy_from_user(&ts, tsp, sizeof(ts)))
+ if (compat_get_timespec64(&ts, tsp))
return -EFAULT;
to = &end_time;
@@ -1399,9 +1384,8 @@ COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
if (sigmask) {
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
- if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+ if (get_compat_sigset(&ksigmask, sigmask))
return -EFAULT;
- sigset_from_compat(&ksigmask, &ss32);
sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);