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Return EINVAL and do not change file pointer if resulting offset is negative.

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PR:		kern/6184
This commit is contained in:
Dag-Erling Smørgrav 1998-04-18 19:24:44 +00:00
parent 9db4b478d6
commit 25096724e8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=35275
2 changed files with 14 additions and 10 deletions
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12
sys/kern/vfs_extattr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.96 1998/03/29 18:23:44 dyson Exp $
* $Id: vfs_syscalls.c,v 1.97 1998/04/08 18:31:57 wosch Exp $
*/
/* For 4.3 integer FS ID compatibility */
@ -1324,6 +1324,7 @@ lseek(p, uap)
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct vattr vattr;
off_t ofs;
int error;
if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
@ -1333,21 +1334,22 @@ lseek(p, uap)
return (ESPIPE);
switch (SCARG(uap, whence)) {
case L_INCR:
fp->f_offset += SCARG(uap, offset);
ofs = fp->f_offset + SCARG(uap, offset);
break;
case L_XTND:
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
if (error)
return (error);
fp->f_offset = SCARG(uap, offset) + vattr.va_size;
ofs = SCARG(uap, offset) + vattr.va_size;
break;
case L_SET:
fp->f_offset = SCARG(uap, offset);
ofs = SCARG(uap, offset);
break;
default:
return (EINVAL);
}
*(off_t *)(p->p_retval) = fp->f_offset;
if (ofs < 0) return (EINVAL);
*(off_t *)(p->p_retval) = fp->f_offset = ofs;
return (0);
}

12
sys/kern/vfs_syscalls.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.96 1998/03/29 18:23:44 dyson Exp $
* $Id: vfs_syscalls.c,v 1.97 1998/04/08 18:31:57 wosch Exp $
*/
/* For 4.3 integer FS ID compatibility */
@ -1324,6 +1324,7 @@ lseek(p, uap)
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct vattr vattr;
off_t ofs;
int error;
if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
@ -1333,21 +1334,22 @@ lseek(p, uap)
return (ESPIPE);
switch (SCARG(uap, whence)) {
case L_INCR:
fp->f_offset += SCARG(uap, offset);
ofs = fp->f_offset + SCARG(uap, offset);
break;
case L_XTND:
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
if (error)
return (error);
fp->f_offset = SCARG(uap, offset) + vattr.va_size;
ofs = SCARG(uap, offset) + vattr.va_size;
break;
case L_SET:
fp->f_offset = SCARG(uap, offset);
ofs = SCARG(uap, offset);
break;
default:
return (EINVAL);
}
*(off_t *)(p->p_retval) = fp->f_offset;
if (ofs < 0) return (EINVAL);
*(off_t *)(p->p_retval) = fp->f_offset = ofs;
return (0);
}