Bug 140934

Summary:	Problem with udev on current stable snapshot
Product:	[openSUSE] SUSE Linux 10.1	Reporter:	Joachim Gleissner <joachim.gleissner>
Component:	Basesystem	Assignee:	Kay Sievers <kasievers>
Status:	RESOLVED FIXED	QA Contact:	E-mail List <qa-bugs>
Severity:	Blocker
Priority:	P5 - None	CC:	eich, sndirsch
Version:	Alpha 4
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	Other	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Attachments:	Xorg start log

Description Joachim Gleissner 2005-12-23 14:52:44 UTC

It seems /dev needs to be mounted with exec flag on current stable snapshot. Otherwise X refuses to start with error "could not map SYS BIOS", vbetool also aborts with a similar error. Maybe other components are affected, too. Is this intended?

Comment 1 Stefan Dirsch 2005-12-23 15:32:52 UTC

Could you attach a complete X logfile? Thanks.

Comment 2 Joachim Gleissner 2005-12-23 15:41:20 UTC

Created attachment 61751 [details]
Xorg start log

Comment 3 Kay Sievers 2005-12-23 16:06:11 UTC

I can reproduce it on one of my boxes, no idea, why the other one is working.
It fails with:
  open("/dev/mem", ORDWR|O_LARGEFILE) = 9
  mmap2(0xf0000, 65536, PROT_READ|PROT_EXEC, MAP_SHARED|MAP_FIXED, 9, 0xf0) = -1 EPERM (Operation not permitted)

Does X depend on PROT_EXEC?

Comment 4 Stefan Dirsch 2005-12-23 16:13:26 UTC

xc/programs/Xserver/hw/xfree86/os-support/linux/int10/linux.c:
[...]
                if ((sysMem = mmap((void *)(SYS_BIOS), BIOS_SIZE,
                                   PROT_READ | PROT_EXEC,
                                   MAP_SHARED | MAP_FIXED, fd, SYS_BIOS))
                    == MAP_FAILED) {
                    xf86DrvMsg(screen, X_ERROR, "Cannot map SYS BIOS\n");
[...]
I think this is intended ...

Comment 5 Stefan Dirsch 2005-12-23 16:16:02 UTC

Egbert?

Comment 6 Stefan Dirsch 2005-12-23 16:23:56 UTC

*** Bug 140939 has been marked as a duplicate of this bug. ***

Comment 7 Kay Sievers 2005-12-23 19:47:14 UTC

Ok, this is likely to cause too much trouble, even if we get X working. I've removed "noexec" from mkinitrd and submittd it to autobuild now.

Comment 8 Kay Sievers 2005-12-26 04:44:38 UTC

Fixed.

Comment 9 Stefan Dirsch 2006-01-01 21:44:46 UTC

*** Bug 141139 has been marked as a duplicate of this bug. ***

Comment 10 Stefan Dirsch 2006-01-09 23:16:35 UTC

*** Bug 141381 has been marked as a duplicate of this bug. ***

Comment 11 Egbert Eich 2006-01-26 15:34:15 UTC

I don't recall exactly any more if the exec flag is really required. It's too long ago. The vm86 code does execute BIOS code in place - other than the emulator. Removing PROT_EXEC and testing on a primary card with VBE DDC detection should reveal if it works without. I doubt it though.