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SubjectPatches to 2.1.5
Date
Hi,

here are two minor patches to make ipx resp. appletalk work under 2.1.5 as
modules. I'm currently not connected to the internet so I don't know if
these patches are already in. I also include my patch to binfmt_elf that
causes the kernel to report ENOMEM in case a binary has too big a data
segment. I still think we should report 'Out of memory' instead of just
dumping core.

Michael

--- linux/net/ipx/af_ipx.c.old Tue Oct 22 08:33:05 1996
+++ linux/net/ipx/af_ipx.c Tue Oct 22 09:10:59 1996
@@ -1036,6 +1036,7 @@
ipxitf_ioctl_real(unsigned int cmd, void *arg)
{
int err;
+ char c;
switch(cmd)
{
case SIOCSIFADDR:
@@ -1087,12 +1088,14 @@
err=verify_area(VERIFY_READ,arg,sizeof(char));
if(err)
return err;
- return ipxcfg_set_auto_create(get_fs_byte(arg));
+ get_user(c, (char *)arg);
+ return ipxcfg_set_auto_create(c);
case SIOCAIPXPRISLT:
err=verify_area(VERIFY_READ,arg,sizeof(char));
if(err)
return err;
- return ipxcfg_set_auto_select(get_fs_byte(arg));
+ get_user(c, (char *)arg);
+ return ipxcfg_set_auto_select(c);
default:
return -EINVAL;
}
@@ -1626,7 +1629,7 @@
err=verify_area(VERIFY_READ,optval,sizeof(int));
if(err)
return err;
- opt=get_fs_long((unsigned long *)optval);
+ get_user(opt, (int *)optval);

switch(level)
{
--- linux/net/appletalk/ddp.c.old Tue Oct 22 08:33:48 1996
+++ linux/net/appletalk/ddp.c Tue Oct 22 09:10:13 1996
@@ -1027,7 +1027,7 @@
err=verify_area(VERIFY_READ,optval,sizeof(int));
if(err)
return err;
- opt=get_fs_long((unsigned long *)optval);
+ get_user(opt, (int *)optval);

switch(level)
{
--- linux/fs/binfmt_elf.c.old Tue Oct 22 09:23:14 1996
+++ linux/fs/binfmt_elf.c Tue Oct 22 09:35:49 1996
@@ -7,6 +7,7 @@
* Tools".
*
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
+ * Added resource limits check: Michael Meskes (meskes@debian.org)
*/

#include <linux/module.h>
@@ -378,8 +379,9 @@
unsigned long elf_entry, interp_load_addr = 0;
int status;
unsigned long start_code, end_code, end_data;
- unsigned long elf_stack;
+ unsigned long elf_stack, datasize;
char passed_fileno[6];
+ unsigned long rlim;

ibcs2_interpreter = 0;
status = 0;
@@ -544,6 +546,24 @@
return -E2BIG;
}
}
+
+ /* MM: Check if we extend resource limits */
+ /* Algorithm proposed by Richard Henderson <rth@tamu.edu> */
+ rlim = current->rlim[RLIMIT_DATA].rlim_cur;
+ if (rlim >= RLIM_INFINITY)
+ rlim = ~0;
+ elf_ppnt = elf_phdata;
+ datasize = 0;
+ for(i=0;i < elf_ex.e_phnum; i++){
+ if(elf_ppnt->p_flags & PF_W) {
+ unsigned long new_data_size = datasize + elf_ppnt->p_memsz;
+ if (new_data_size > rlim || new_data_size < datasize)
+ return -ENOMEM;
+ datasize = new_data_size;
+ }
+ elf_ppnt++;
+ }
+ /* MM: End */

/* OK, This is the point of no return */
flush_old_exec(bprm);
--
Michael Meskes | _____ ________ __ ____
meskes@informatik.rwth-aachen.de | / ___// ____/ // / / __ \___ __________
meskes@sanet.de | \__ \/ /_ / // /_/ /_/ / _ \/ ___/ ___/
meskes@debian.org | ___/ / __/ /__ __/\__, / __/ / (__ )
Use Debian GNU/Linux! | /____/_/ /_/ /____/\___/_/ /____/
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