Bug 1979804

Summary:	emacs: portable dumper incompatible with 64K pages on aarch64
Product:	Red Hat Enterprise Linux 9	Reporter:	Florian Weimer <fweimer>
Component:	emacs	Assignee:	Jacek Migacz <jmigacz>
Status:	CLOSED ERRATA	QA Contact:	Frantisek Sumsal <fsumsal>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.0	CC:	ddutile, fsumsal, gcase, sam
Target Milestone:	beta	Keywords:	Reopened, Triaged
Target Release:	---
Hardware:	aarch64
OS:	Unspecified
Whiteboard:
Fixed In Version:	emacs-27.2-8.el9	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	1974244	Environment:
Last Closed:	2023-05-09 07:49:00 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1974244
Bug Blocks:	1978730, 2151999

Description Florian Weimer 2021-07-07 06:18:52 UTC

If the aarch64 builders for CentOS 9 or Red Hat Enterprise Linux 9 switch to 4K pages, this bug will also affect the Emacs package there.

+++ This bug was initially created as a clone of Bug #1974244 +++

The emacs binary from emacs-nox-27.2-2.fc33.aarch64 cannot start in a chroot on Red Hat Enterprise Linux 8 because it assumes 4K pages:

openat(AT_FDCWD, "/usr/bin/emacs-27.2-nox.pdmp", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=10124128, ...}) = 0
read(3, "DUMPEDGNUEMACS\0\0(\304wp;D\330G%\f\265\337\214\264VO"..., 80) = 80
mmap(NULL, 10124128, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff92240000
mmap(0xffff92240000, 6946816, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xffff92240000
mmap(0xffff928e0000, 90112, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x6a0000) = 0xffff928e0000
mmap(0xffff928f6000, 3087200, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x6b6000) = -1 EINVAL (Invalid argument)

Map offsets and addresses must be a multiple of the page size.

Comment 6 Florian Weimer 2023-01-09 13:27:24 UTC

I believe this was fixed upstream with this commit:

commit 216c65b135c2b0be7e048cdc6683873b03b99b9a
Author: Lars Ingebrigtsen <larsi>
Date:   Sun Mar 28 19:13:00 2021 +0200

    Use a 64KB page size for pdump
    
    * src/pdumper.c (dump_get_page_size): Use a 64KB page size on all
    architectures, as this many vary between systems (bug#47125).

Comment 12 errata-xmlrpc 2023-05-09 07:49:00 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: emacs security and bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:2366