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Commit 8e96e3b7 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs 



Acked-by: default avatarSerge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 72cda3d1

fs/attr.c

+4 −4
Original line number Diff line number Diff line
@@ -47,14 +47,14 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr) 


	/* Make sure a caller can chown. */

	if ((ia_valid & ATTR_UID) &&

	    (current_fsuid() != inode->i_uid ||

	     attr->ia_uid != inode->i_uid) && !capable(CAP_CHOWN))

	    (!uid_eq(current_fsuid(), inode->i_uid) ||

	     !uid_eq(attr->ia_uid, inode->i_uid)) && !capable(CAP_CHOWN))

		return -EPERM;



	/* Make sure caller can chgrp. */

	if ((ia_valid & ATTR_GID) &&

	    (current_fsuid() != inode->i_uid ||

	    (!in_group_p(attr->ia_gid) && attr->ia_gid != inode->i_gid)) &&

	    (!uid_eq(current_fsuid(), inode->i_uid) ||

	    (!in_group_p(attr->ia_gid) && !gid_eq(attr->ia_gid, inode->i_gid))) &&

	    !capable(CAP_CHOWN))

		return -EPERM;

fs/exec.c

+5 −5
Original line number Diff line number Diff line
@@ -1139,7 +1139,7 @@ void setup_new_exec(struct linux_binprm * bprm) 
	/* This is the point of no return */

	current->sas_ss_sp = current->sas_ss_size = 0;



	if (current_euid() == current_uid() && current_egid() == current_gid())

	if (uid_eq(current_euid(), current_uid()) && gid_eq(current_egid(), current_gid()))

		set_dumpable(current->mm, 1);

	else

		set_dumpable(current->mm, suid_dumpable);
@@ -1153,8 +1153,8 @@ void setup_new_exec(struct linux_binprm * bprm) 
	current->mm->task_size = TASK_SIZE;



	/* install the new credentials */

	if (bprm->cred->uid != current_euid() ||

	    bprm->cred->gid != current_egid()) {

	if (!uid_eq(bprm->cred->uid, current_euid()) ||

	    !gid_eq(bprm->cred->gid, current_egid())) {

		current->pdeath_signal = 0;

	} else {

		would_dump(bprm, bprm->file);
@@ -2120,7 +2120,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) 
	if (__get_dumpable(cprm.mm_flags) == 2) {

		/* Setuid core dump mode */

		flag = O_EXCL;		/* Stop rewrite attacks */

		cred->fsuid = 0;	/* Dump root private */

		cred->fsuid = GLOBAL_ROOT_UID;	/* Dump root private */

	}



	retval = coredump_wait(exit_code, &core_state);
@@ -2221,7 +2221,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs) 
		 * Dont allow local users get cute and trick others to coredump

		 * into their pre-created files.

		 */

		if (inode->i_uid != current_fsuid())

		if (!uid_eq(inode->i_uid, current_fsuid()))

			goto close_fail;

		if (!cprm.file->f_op || !cprm.file->f_op->write)

			goto close_fail;

fs/fcntl.c

+3 −3
Original line number Diff line number Diff line
@@ -532,9 +532,9 @@ static inline int sigio_perm(struct task_struct *p, 


	rcu_read_lock();

	cred = __task_cred(p);

	ret = ((fown->euid == 0 ||

		fown->euid == cred->suid || fown->euid == cred->uid ||

		fown->uid  == cred->suid || fown->uid  == cred->uid) &&

	ret = ((uid_eq(fown->euid, GLOBAL_ROOT_UID) ||

		uid_eq(fown->euid, cred->suid) || uid_eq(fown->euid, cred->uid) ||

		uid_eq(fown->uid,  cred->suid) || uid_eq(fown->uid,  cred->uid)) &&

	       !security_file_send_sigiotask(p, fown, sig));

	rcu_read_unlock();

	return ret;

fs/ioprio.c

+2 −2
Original line number Diff line number Diff line
@@ -37,8 +37,8 @@ int set_task_ioprio(struct task_struct *task, int ioprio) 


	rcu_read_lock();

	tcred = __task_cred(task);

	if (tcred->uid != cred->euid &&

	    tcred->uid != cred->uid && !capable(CAP_SYS_NICE)) {

	if (!uid_eq(tcred->uid, cred->euid) &&

	    !uid_eq(tcred->uid, cred->uid) && !capable(CAP_SYS_NICE)) {

		rcu_read_unlock();

		return -EPERM;

	}

fs/locks.c

+1 −1
Original line number Diff line number Diff line
@@ -1445,7 +1445,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) 
	struct inode *inode = dentry->d_inode;

	int error;



	if ((current_fsuid() != inode->i_uid) && !capable(CAP_LEASE))

	if ((!uid_eq(current_fsuid(), inode->i_uid)) && !capable(CAP_LEASE))

		return -EACCES;

	if (!S_ISREG(inode->i_mode))

		return -EINVAL;