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3 Commits

Author SHA1 Message Date
Alexander Egorenkov 1f68c1aaf3 zdump/ngdump: Perform sanity checks on path to dump image 
Ensure that the path to a dump image specified in the NGDump meta file
of a dump device points to a valid location within the dump device.
Especially, disallow escaping from a dump device with a dump image path
using references to '..' or symbolic links pointing outside of the dump
device.

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
 2026-07-20 15:25:59 +02:00
Mikhail Zaslonko 6547d1ae4c zdump/ngdump: Add error messages and debug trace logs 
Add debug trace logs for ngdump_read_meta_from_device().

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
 2025-07-29 18:23:49 +02:00
Alexander Egorenkov 6c0f429805 zdump: Implement DFI interface for NGDump 
The NGDump DFI interface enables zgetdump to read and mount dumps created
with NGDump stand-alone dump.

Under the hood, the NGDump DFI delegates the task of reading and
parsing of ELF dump files to the ELF DFI interface dfi_elf.

Usage example 1:
----------------

$ zgetdump -i /dev/nvme0n1p1
General dump info:
  Dump format........: elf
  Version............: 1
  UTS node name......: t83lp49.lnxne.boe
  UTS kernel release.: 5.14.0-20210819.rc6.git0.efb8a921eec7.300.fc34.s390x
  UTS kernel version.: #1 SMP Thu Aug 19 00:22:04 CEST 2021
  System arch........: s390x (64 bit)
  CPU count (online).: 32
  Dump memory range..: 16384 MB

Memory map:
  0000000000000000 - 00000003ffffffff (16384 MB)

Usage example 2:
----------------

$ zgetdump /dev/nvme0n1p1 > dump.elf

Usage example 3:
----------------

$ zgetdump -m /dev/nvme0n1p1 /mnt
$ ls -l /mnt/dump.elf
$ zgetdump -u /mnt

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Tested-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
 2022-06-20 13:14:05 +02:00