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[PATCH] futex: check and validate timevals

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The futex timeval is not checked for correctness.  The change does not
break existing applications as the timeval is supplied by glibc (and glibc
always passes a correct value), but the glibc-internal tests for this
functionality fail.

Signed-off-by: Thomas Gleixner <tglx@tglx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Thomas Gleixner 2006-03-31 02:31:32 -08:00 committed by Linus Torvalds
parent d425b274ba
commit 9741ef964d
2 changed files with 6 additions and 2 deletions
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4
kernel/futex.c
View File

@ -1039,9 +1039,11 @@ asmlinkage long sys_futex(u32 __user *uaddr, int op, int val,
unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
int val2 = 0;
if ((op == FUTEX_WAIT) && utime) {
if (utime && (op == FUTEX_WAIT)) {
if (copy_from_user(&t, utime, sizeof(t)) != 0)
return -EFAULT;
if (!timespec_valid(&t))
return -EINVAL;
timeout = timespec_to_jiffies(&t) + 1;
}
/*

4
kernel/futex_compat.c
View File

@ -129,9 +129,11 @@ asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
int val2 = 0;
if ((op == FUTEX_WAIT) && utime) {
if (utime && (op == FUTEX_WAIT)) {
if (get_compat_timespec(&t, utime))
return -EFAULT;
if (!timespec_valid(&t))
return -EINVAL;
timeout = timespec_to_jiffies(&t) + 1;
}
if (op >= FUTEX_REQUEUE)