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Commit 8310a32c authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC]: Fix length parameter verification in sys_getdomainname(). 



Found by scrashme.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8a84eb16

arch/sparc/kernel/sys_sparc.c

+9 −9
Original line number Diff line number Diff line
@@ -465,21 +465,21 @@ sys_rt_sigaction(int sig, 


asmlinkage int sys_getdomainname(char __user *name, int len)

{

 	int nlen;

 	int err = -EFAULT;

 	int nlen, err;

 	

	if (len < 0 || len > __NEW_UTS_LEN)

		return -EINVAL;



 	down_read(&uts_sem);

 	

	nlen = strlen(system_utsname.domainname) + 1;



	if (nlen < len)

		len = nlen;

	if (len > __NEW_UTS_LEN)

		goto done;

	if (copy_to_user(name, system_utsname.domainname, len))

		goto done;



	err = -EFAULT;

	if (!copy_to_user(name, system_utsname.domainname, len))

		err = 0;

done:



	up_read(&uts_sem);

	return err;

}

arch/sparc64/kernel/sys_sparc.c

+9 −9
Original line number Diff line number Diff line
@@ -701,21 +701,21 @@ extern void check_pending(int signum); 


asmlinkage long sys_getdomainname(char __user *name, int len)

{

        int nlen;

	int err = -EFAULT;

        int nlen, err;



	if (len < 0 || len > __NEW_UTS_LEN)

		return -EINVAL;



 	down_read(&uts_sem);

 	

	nlen = strlen(system_utsname.domainname) + 1;



        if (nlen < len)

                len = nlen;

	if (len > __NEW_UTS_LEN)

		goto done;

	if (copy_to_user(name, system_utsname.domainname, len))

		goto done;



	err = -EFAULT;

	if (!copy_to_user(name, system_utsname.domainname, len))

		err = 0;

done:



	up_read(&uts_sem);

	return err;

}