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alpha: fix stack smashing in old_adjtimex(2)

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-03-25 00:43:43 -04:00
parent c1ae3cfa0e
commit 2b5efc0897
1 changed files with 1 additions and 1 deletions
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2
arch/alpha/kernel/osf_sys.c
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@ -1290,7 +1290,7 @@ SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
/* copy relevant bits of struct timex. */ /* copy relevant bits of struct timex. */
if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
offsetof(struct timex32, time))) offsetof(struct timex32, tick)))
return -EFAULT; return -EFAULT;
ret = do_adjtimex(&txc); ret = do_adjtimex(&txc);