Differential D22811 Diff 65646 sys/compat/linux/linux_misc.c

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sys/compat/linux/linux_misc.c

Show First 20 Lines • Show All 1,213 Lines • ▼ Show 20 Lines	linux_nice(struct thread td, struct linux_nice_args args)
return (sys_setpriority(td, &bsd_args));		return (sys_setpriority(td, &bsd_args));
}		}
#endif /* __i386__ \|\| (__amd64__ && COMPAT_LINUX32) */		#endif /* __i386__ \|\| (__amd64__ && COMPAT_LINUX32) */

int		int
linux_setgroups(struct thread td, struct linux_setgroups_args args)		linux_setgroups(struct thread td, struct linux_setgroups_args args)
{		{
struct ucred newcred, oldcred;		struct ucred newcred, oldcred;
		struct credwrap newcredwrap, oldcredwrap;
l_gid_t *linux_gidset;		l_gid_t *linux_gidset;
gid_t *bsd_gidset;		gid_t *bsd_gidset;
int ngrp, error;		int ngrp, error;
struct proc *p;		struct proc *p;

ngrp = args->gidsetsize;		ngrp = args->gidsetsize;
if (ngrp < 0 \|\| ngrp >= ngroups_max + 1)		if (ngrp < 0 \|\| ngrp >= ngroups_max + 1)
return (EINVAL);		return (EINVAL);
linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK);		linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_LINUX, M_WAITOK);
error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));		error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
if (error)		if (error)
goto out;		goto out;
newcred = crget();		newcred = crget();
		newcredwrap = crwget(newcred);
crextend(newcred, ngrp + 1);		crextend(newcred, ngrp + 1);
p = td->td_proc;		p = td->td_proc;
PROC_LOCK(p);		PROC_LOCK(p);
oldcred = p->p_ucred;		oldcred = p->p_ucred;
		oldcredwrap = p->p_credwrap;
crcopy(newcred, oldcred);		crcopy(newcred, oldcred);

/*		/*
* cr_groups[0] holds egid. Setting the whole set from		* cr_groups[0] holds egid. Setting the whole set from
* the supplied set will cause egid to be changed too.		* the supplied set will cause egid to be changed too.
* Keep cr_groups[0] unchanged to prevent that.		* Keep cr_groups[0] unchanged to prevent that.
*/		*/

if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS)) != 0) {		if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS)) != 0) {
PROC_UNLOCK(p);		PROC_UNLOCK(p);
crfree(newcred);		crfree(newcred);
		crwfree(newcredwrap);
goto out;		goto out;
}		}

if (ngrp > 0) {		if (ngrp > 0) {
newcred->cr_ngroups = ngrp + 1;		newcred->cr_ngroups = ngrp + 1;

bsd_gidset = newcred->cr_groups;		bsd_gidset = newcred->cr_groups;
ngrp--;		ngrp--;
while (ngrp >= 0) {		while (ngrp >= 0) {
bsd_gidset[ngrp + 1] = linux_gidset[ngrp];		bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
ngrp--;		ngrp--;
}		}
} else		} else
newcred->cr_ngroups = 1;		newcred->cr_ngroups = 1;

setsugid(p);		setsugid(p);
proc_set_cred(p, newcred);		proc_set_cred(p, newcred, newcredwrap);
PROC_UNLOCK(p);		PROC_UNLOCK(p);
crfree(oldcred);		crfree(oldcred);
		crwfree(oldcredwrap);
error = 0;		error = 0;
out:		out:
free(linux_gidset, M_LINUX);		free(linux_gidset, M_LINUX);
return (error);		return (error);
}		}

int		int
linux_getgroups(struct thread td, struct linux_getgroups_args args)		linux_getgroups(struct thread td, struct linux_getgroups_args args)
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