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linux/arch/s390
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Gerald Schaefer 4c1cbcbd6c s390/kaslr: add support for R_390_JMP_SLOT relocation type 
With certain kernel configurations, the R_390_JMP_SLOT relocation type
might be generated, which is not expected by the KASLR relocation code,
and the kernel stops with the message "Unknown relocation type".

This was found with a zfcpdump kernel config, where CONFIG_MODULES=n
and CONFIG_VFIO=n. In that case, symbol_get() is used on undefined
__weak symbols in virt/kvm/vfio.c, which results in the generation
of R_390_JMP_SLOT relocation types.

Fix this by handling R_390_JMP_SLOT similar to R_390_GLOB_DAT.

Fixes: 805bc0bc23 ("s390/kernel: build a relocatable kernel")
Cc: <stable@vger.kernel.org> # v5.2+
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2020-05-20 10:13:27 +02:00
..
appldata s390: Replace zero-length array with flexible-array member 2020-02-27 16:02:21 +01:00
boot s390/protvirt: fix compilation issue 2020-04-25 10:17:24 +02:00
configs s390 updates for the 5.7 merge window 2020-04-04 09:45:50 -07:00
crypto s390/crypto: explicitly memzero stack key material in aes_s390.c 2020-02-27 16:02:21 +01:00
hypfs fs_parse: fold fs_parameter_desc/fs_parameter_spec 2020-02-07 14:48:37 -05:00
include s390/pci: Fix s390_mmio_read/write with MIO 2020-05-14 23:21:37 +02:00
kernel s390/kaslr: add support for R_390_JMP_SLOT relocation type 2020-05-20 10:13:27 +02:00
kvm KVM: s390: Fix for running nested uner z/VM 2020-05-06 08:09:17 -04:00
lib s390/mm: fix page table upgrade vs 2ndary address mode accesses 2020-04-21 15:16:43 +02:00
mm s390/mm: fix set_huge_pte_at() for empty ptes 2020-05-20 10:13:27 +02:00
net s390/bpf: Remove JITed image size limitations 2019-11-18 19:51:16 -08:00
numa s390/mm: remove fake numa support 2020-02-27 16:02:21 +01:00
oprofile s390/unwind: introduce stack unwind API 2019-05-02 13:54:11 +02:00
pci s390/pci: Fix s390_mmio_read/write with MIO 2020-05-14 23:21:37 +02:00
purgatory .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
scripts s390/build: use size command to perform empty .bss check 2019-08-08 14:36:53 +02:00
tools .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Kbuild s390/kexec_file: Add purgatory 2018-04-16 09:10:22 +02:00
Kconfig s390 updates for the 5.7 merge window 2020-04-04 09:45:50 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile s390: make 'install' not depend on vmlinux 2020-02-17 18:01:58 +01:00