Unnamed repository
Go to file
Philipp Rudo 90da030e61 add generic cycle detection
Resolves: bz2069200
Upstream: github.com/makedumpfile/makedumpfile.git
Conflicts: None

commit feae3d1754d2b0788ce1f18b0cd4b40098ff52ff
Author: Philipp Rudo <prudo@redhat.com>
Date:   Mon Mar 14 17:04:29 2022 +0100

    [PATCH v2 1/3] add generic cycle detection

    In order to work makedumpfile needs to interpret data read from the
    dump. This can cause problems as the data from the dump cannot be
    trusted (otherwise the kernel wouldn't have panicked in the first
    place). This also means that every loop which stop condition depend on
    data read from the dump has a chance to loop forever. Thus add a generic
    cycle detection mechanism that allows to detect and handle such
    situations appropriately.

    For cycle detection use Brent's algorithm [1] as it has constant memory
    usage. With this it can also be used in the kdump kernel without the
    danger that it runs oom when iterating large data structures.
    Furthermore it only depends on some pointer arithmetic. Thus the
    performance impact (as long as no cycle was detected) should be
    comparatively small.

    [1] https://en.wikipedia.org/wiki/Cycle_detection#Brent's_algorithm

    Suggested-by: Dave Wysochanski <dwysocha@redhat.com>
    Signed-off-by: Philipp Rudo <prudo@redhat.com>
    Reviewed-and-tested-by: Dave Wysochanski <dwysocha@redhat.com>

Signed-off-by: Philipp Rudo <prudo@redhat.com>
2022-03-28 18:38:30 +02:00
tests Merged update from upstream sources 2020-11-20 12:35:49 +00:00
.editorconfig kdump-lib-initramfs.sh: prepare to be a POSIX compatible lib 2021-11-09 21:45:15 +08:00
.gitignore RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
60-kdump.install Write to `/var/lib/kdump` if $KDUMP_BOOTDIR not writable 2021-06-23 09:34:40 +08:00
92-crashkernel.install reset kernel crashkernel for the special case where the kernel is updated right after kexec-tools 2022-01-06 03:55:25 +00:00
98-kexec.rules RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
98-kexec.rules.ppc64 Stop reloading kdump service on CPU hotplug event for FADump 2021-05-14 14:27:03 +08:00
README RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
crashkernel-howto.txt update crashkernel-howto 2022-01-06 03:55:25 +00:00
dracut-early-kdump-module-setup.sh dracut-early-kdump-module-setup.sh: install xargs and kdump-lib-initramfs.sh 2022-01-06 14:31:33 +08:00
dracut-early-kdump.sh dracut-early-kdump.sh: make it POSIX compatible 2021-11-10 10:27:00 +08:00
dracut-fadump-init-fadump.sh fadump-init: clean up mount points properly 2021-07-20 15:43:43 +08:00
dracut-fadump-module-setup.sh fadump: isolate fadump initramfs image within the default one 2021-07-20 15:43:11 +08:00
dracut-kdump-capture.service RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
dracut-kdump-emergency.service Merge kdump-error-handler.sh into kdump.sh 2021-11-09 21:45:31 +08:00
dracut-kdump-emergency.target RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
dracut-kdump.sh Add header comment for POSIX compliant scripts 2021-11-10 10:26:54 +08:00
dracut-module-setup.sh ppc64/ppc64le: drop cpu online rule in 40-redhat.rules in kdump initramfs 2021-12-29 11:21:42 +08:00
dracut-monitor_dd_progress RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
early-kdump-howto.txt RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
fadump-howto.txt fadump: improve fadump-howto.txt about remote dump target setup 2021-12-08 08:59:31 +08:00
gating.yaml Add gating.yaml to RHEL-9 kexec-tools 2021-06-08 20:03:41 +08:00
kdump-dep-generator.sh Merged update from upstream sources 2021-01-22 08:12:00 +00:00
kdump-in-cluster-environment.txt RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
kdump-lib-initramfs.sh move variable FENCE_KDUMP_SEND from kdump-lib.sh to kdump-lib-initramfs.sh 2022-01-18 15:16:29 +08:00
kdump-lib.sh Revert "Remove trace_buf_size and trace_event from the kernel bootparameters of the kdump kernel" 2022-01-26 14:58:39 +08:00
kdump-logger.sh Add header comment for POSIX compliant scripts 2021-11-10 10:26:54 +08:00
kdump-migrate-action.sh kdump/ppc64: rebuild initramfs image after migration 2021-12-03 18:13:09 +08:00
kdump-restart.sh kdump/ppc64: rebuild initramfs image after migration 2021-12-03 18:13:09 +08:00
kdump-udev-throttler RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
kdump.conf introduce the auto_reset_crashkernel option to kdump.conf 2022-01-06 03:55:25 +00:00
kdump.conf.5 introduce the auto_reset_crashkernel option to kdump.conf 2022-01-06 03:55:25 +00:00
kdump.service Merged update from upstream sources 2020-11-05 05:34:29 +00:00
kdump.sysconfig Disable CMA in kdump 2nd kernel 2021-05-14 14:27:03 +08:00
kdump.sysconfig.aarch64 kdump.sysconfig: make kexec_file_load as default option on arm64 2021-11-12 05:58:48 +00:00
kdump.sysconfig.i386 Disable CMA in kdump 2nd kernel 2021-05-14 14:27:03 +08:00
kdump.sysconfig.ppc64 Disable CMA in kdump 2nd kernel 2021-05-14 14:27:03 +08:00
kdump.sysconfig.ppc64le kdump.sysconfig: make kexec_file_load as default option on ppc64le 2021-11-12 09:47:42 +08:00
kdump.sysconfig.s390x kdump.sysconfig.s390: Remove "prot_virt" from kdump kernel cmdline 2021-07-20 17:27:12 +02:00
kdump.sysconfig.x86_64 Revert "Revert "x86_64: enable the kexec file load by default"" 2021-07-14 09:21:57 +08:00
kdumpctl fix incorrect usage of _get_all_kernels_from_grubby 2022-02-14 11:04:47 +08:00
kdumpctl.8 rewrite reset_crashkernel to support fadump and to used by RPM scriptlet 2022-01-06 03:55:25 +00:00
kexec-kdump-howto.txt Document/kexec-kdump-howto.txt: improve notes for kdump_pre and kdump_post scripts 2021-12-07 20:02:41 +08:00
kexec-tools-2.0.22-01-s390_handle_R_390_PLT32DBL_reloc_entries_in_machine_apply_elf_rel_.patch s390: handle R_390_PLT32DBL reloc entries in machine_apply_elf_rel() 2022-01-19 10:35:02 +01:00
kexec-tools-2.0.23-01-_PATCH_v2_1_3_add_generic_cycle_detection.patch add generic cycle detection 2022-03-28 18:38:30 +02:00
kexec-tools-2.0.23-makedumpfile-sadump-kaslr-fix-failure-of-calculating-kaslr_.patch makedumpfile: sadump, kaslr: fix failure of calculating kaslr_offset 2022-02-25 09:53:51 +08:00
kexec-tools.spec add generic cycle detection 2022-03-28 18:38:30 +02:00
live-image-kdump-howto.txt RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00
mkdumprd mkdumprd (RHEL-only): add nvme module by force 2022-01-26 11:19:56 +08:00
mkdumprd.8 Merged update from upstream sources 2020-12-23 10:00:07 +00:00
mkfadumprd Set zstd as recommented for kexec-tools 2022-01-11 10:02:52 +08:00
sources Release 2.0.23-3 2021-12-08 09:13:27 +08:00
supported-kdump-targets.txt Update supported-kdump-targets.txt 2021-11-26 13:38:12 +08:00
zanata-notes.txt RHEL 9.0.0 Alpha bootstrap 2020-10-15 14:45:57 +02:00

README

Adding a patch to kexec-tools
=============================
There is a mailing list kexec@lists.fedoraproject.org where all the dicussion
related to fedora kexec-tools happen. All the patches are posted there for
inclusion and committed to kexec-tools after review.

So if you want your patches to be included in fedora kexec-tools package,
post these to kexec@lists.fedoraproject.org.

One can subscribe to list and browse through archives here.

https://admin.fedoraproject.org/mailman/listinfo/kexec