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WSL2-Linux-Kernel
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y2038: syscalls: change remaining timeval to __kernel_old_timeval 

All of the remaining syscalls that pass a timeval (gettimeofday, utime,
futimesat) can trivially be changed to pass a __kernel_old_timeval
instead, which has a compatible layout, but avoids ambiguity with
the timeval type in user space.

Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2019-10-25 22:56:17 +02:00
Родитель bdd565f817
Коммит 75d319c06e
7 изменённых файлов: 20 добавлений и 19 удалений
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3
arch/powerpc/include/asm/asm-prototypes.h
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@ -92,7 +92,8 @@ long sys_swapcontext(struct ucontext __user *old_ctx,
long sys_debug_setcontext(struct ucontext __user *ctx,
int ndbg, struct sig_dbg_op __user *dbg);
int
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp);
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
struct __kernel_old_timeval __user *tvp);
unsigned long __init early_init(unsigned long dt_ptr);
void __init machine_init(u64 dt_ptr);
#endif

4
arch/powerpc/kernel/syscalls.c
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@ -79,7 +79,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, size_t, len,
* sys_select() with the appropriate args. -- Cort
*/
int
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct __kernel_old_timeval __user *tvp)
{
if ( (unsigned long)n >= 4096 )
{
@ -89,7 +89,7 @@ ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, s
|| __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
|| __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
|| __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
|| __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
|| __get_user(tvp, ((struct __kernel_old_timeval __user * __user *)(buffer+4))))
return -EFAULT;
}
return sys_select(n, inp, outp, exp, tvp);

10
fs/select.c
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@ -321,7 +321,7 @@ static int poll_select_finish(struct timespec64 *end_time,
switch (pt_type) {
case PT_TIMEVAL:
{
struct timeval rtv;
struct __kernel_old_timeval rtv;
if (sizeof(rtv) > sizeof(rtv.tv_sec) + sizeof(rtv.tv_usec))
memset(&rtv, 0, sizeof(rtv));
@ -698,10 +698,10 @@ out_nofds:
}
static int kern_select(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, struct timeval __user *tvp)
fd_set __user *exp, struct __kernel_old_timeval __user *tvp)
{
struct timespec64 end_time, *to = NULL;
struct timeval tv;
struct __kernel_old_timeval tv;
int ret;
if (tvp) {
@ -720,7 +720,7 @@ static int kern_select(int n, fd_set __user *inp, fd_set __user *outp,
}
SYSCALL_DEFINE5(select, int, n, fd_set __user *, inp, fd_set __user *, outp,
fd_set __user *, exp, struct timeval __user *, tvp)
fd_set __user *, exp, struct __kernel_old_timeval __user *, tvp)
{
return kern_select(n, inp, outp, exp, tvp);
}
@ -810,7 +810,7 @@ SYSCALL_DEFINE6(pselect6_time32, int, n, fd_set __user *, inp, fd_set __user *,
struct sel_arg_struct {
unsigned long n;
fd_set __user *inp, *outp, *exp;
struct timeval __user *tvp;
struct __kernel_old_timeval __user *tvp;
};
SYSCALL_DEFINE1(old_select, struct sel_arg_struct __user *, arg)

8
fs/utimes.c
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@ -161,9 +161,9 @@ SYSCALL_DEFINE4(utimensat, int, dfd, const char __user *, filename,
* utimensat() instead.
*/
static long do_futimesat(int dfd, const char __user *filename,
struct timeval __user *utimes)
struct __kernel_old_timeval __user *utimes)
{
struct timeval times[2];
struct __kernel_old_timeval times[2];
struct timespec64 tstimes[2];
if (utimes) {
@ -190,13 +190,13 @@ static long do_futimesat(int dfd, const char __user *filename,
SYSCALL_DEFINE3(futimesat, int, dfd, const char __user *, filename,
struct timeval __user *, utimes)
struct __kernel_old_timeval __user *, utimes)
{
return do_futimesat(dfd, filename, utimes);
}
SYSCALL_DEFINE2(utimes, char __user *, filename,
struct timeval __user *, utimes)
struct __kernel_old_timeval __user *, utimes)
{
return do_futimesat(AT_FDCWD, filename, utimes);
}

10
include/linux/syscalls.h
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@ -51,7 +51,7 @@ struct statx;
struct __sysctl_args;
struct sysinfo;
struct timespec;
struct timeval;
struct __kernel_old_timeval;
struct __kernel_timex;
struct timezone;
struct tms;
@ -732,7 +732,7 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
asmlinkage long sys_getcpu(unsigned __user *cpu, unsigned __user *node, struct getcpu_cache __user *cache);
/* kernel/time.c */
asmlinkage long sys_gettimeofday(struct timeval __user *tv,
asmlinkage long sys_gettimeofday(struct __kernel_old_timeval __user *tv,
struct timezone __user *tz);
asmlinkage long sys_settimeofday(struct timeval __user *tv,
struct timezone __user *tz);
@ -1082,9 +1082,9 @@ asmlinkage long sys_time32(old_time32_t __user *tloc);
asmlinkage long sys_utime(char __user *filename,
struct utimbuf __user *times);
asmlinkage long sys_utimes(char __user *filename,
struct timeval __user *utimes);
struct __kernel_old_timeval __user *utimes);
asmlinkage long sys_futimesat(int dfd, const char __user *filename,
struct timeval __user *utimes);
struct __kernel_old_timeval __user *utimes);
#endif
asmlinkage long sys_futimesat_time32(unsigned int dfd,
const char __user *filename,
@ -1098,7 +1098,7 @@ asmlinkage long sys_getdents(unsigned int fd,
struct linux_dirent __user *dirent,
unsigned int count);
asmlinkage long sys_select(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, struct timeval __user *tvp);
fd_set __user *exp, struct __kernel_old_timeval __user *tvp);
asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds,
int timeout);
asmlinkage long sys_epoll_wait(int epfd, struct epoll_event __user *events,

2
kernel/power/power.h
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@ -179,7 +179,7 @@ extern void swsusp_close(fmode_t);
extern int swsusp_unmark(void);
#endif
struct timeval;
struct __kernel_old_timeval;
/* kernel/power/swsusp.c */
extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);

2
kernel/time/time.c
Просмотреть файл

@ -137,7 +137,7 @@ SYSCALL_DEFINE1(stime32, old_time32_t __user *, tptr)
#endif /* __ARCH_WANT_SYS_TIME32 */
#endif
SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv,
SYSCALL_DEFINE2(gettimeofday, struct __kernel_old_timeval __user *, tv,
struct timezone __user *, tz)
{
if (likely(tv != NULL)) {