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Add early checks for MNT_ROOTFS since we need to allow it later on in

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the code path.
This commit is contained in:
Poul-Henning Kamp 2004-12-03 19:25:44 +00:00
parent a08805c741
commit 2a8b79eb6a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=138357
1 changed files with 9 additions and 0 deletions
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9
sys/kern/vfs_mount.c
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@ -389,6 +389,10 @@ nmount(td, uap)
int error;
u_int iovcnt;
/* Kick out MNT_ROOTFS early as it is legal internally */
if (uap->flags & MNT_ROOTFS)
return (EINVAL);
iovcnt = uap->iovcnt;
/*
* Check that we have an even number of iovec's
@ -396,6 +400,7 @@ nmount(td, uap)
*/
if ((iovcnt & 1) || (iovcnt < 4))
return (EINVAL);
error = copyinuio(uap->iovp, iovcnt, &auio);
if (error)
return (error);
@ -610,6 +615,10 @@ mount(td, uap)
char *fspath;
int error;
/* Kick out MNT_ROOTFS early as it is legal internally */
if (uap->flags & MNT_ROOTFS)
return (EINVAL);
fstype = malloc(MFSNAMELEN, M_TEMP, M_WAITOK);
fspath = malloc(MNAMELEN, M_TEMP, M_WAITOK);