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Arvind Sankar 9c79c9e658 x86/mm/ident_map: Check for errors from ident_pud_init() 
[ Upstream commit 1fcd009102ee02e217f2e7635ab65517d785da8e ]

Commit

  ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")

added ident_p4d_init() to support 5-level paging, but this function
doesn't check and return errors from ident_pud_init().

For example, the decompressor stub uses this code to create an identity
mapping. If it runs out of pages while trying to allocate a PMD
pagetable, the error will be currently ignored.

Fix this to propagate errors.

 [ bp: Space out statements for better readability. ]

Fixes: ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lkml.kernel.org/r/20201027230648.1885111-1-nivedita@alum.mit.edu
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-12-30 11:52:58 +01:00
..
pat
x86/mm/pat: Don't flush cache if hardware enforces cache coherency across encryption domnains
2020-09-18 10:47:00 +02:00
amdtopology.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
cpu_entry_area.c
x86/dumpstack/64: Add noinstr version of get_stack_info()
2020-09-09 11:33:19 +02:00
debug_pagetables.c
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
dump_pagetables.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
extable.c
This feature enhances the current guest memory encryption support
2020-10-14 10:21:34 -07:00
fault.c
ARM:
2020-10-23 11:17:56 -07:00
highmem_32.c
arch/kunmap_atomic: consolidate duplicate code
2020-06-04 19:06:22 -07:00
hugetlbpage.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
ident_map.c
x86/mm/ident_map: Check for errors from ident_pud_init()
2020-12-30 11:52:58 +01:00
init_32.c
A set of locking fixes and updates:
2020-08-10 19:07:44 -07:00
init_64.c
x86/mm/64: Update comment in preallocate_vmalloc_pages()
2020-08-15 13:56:16 +02:00
init.c
x86/mm: Fix -Wmissing-prototypes warnings for arch/x86/mm/init.c
2020-06-17 10:45:46 +02:00
iomap_32.c
x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>
2019-12-10 10:12:55 +01:00
ioremap.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
kasan_init_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
kaslr.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
kmmio.c
Misc changes:
2020-06-05 11:18:53 -07:00
maccess.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00
Makefile
kbuild: remove cc-option test of -fno-stack-protector
2020-07-07 11:13:10 +09:00
mem_encrypt_boot.S
mm: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
mem_encrypt_identity.c
x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP
2020-12-10 12:28:06 +01:00
mem_encrypt.c
x86/head/64: Check SEV encryption before switching to kernel page-table
2020-10-29 18:09:59 +01:00
mm_internal.h
x86/mm: thread pgprot_t through init_memory_mapping()
2020-04-10 15:36:21 -07:00
mmap.c
x86/mm/mmap: Fix -Wmissing-prototypes warnings
2020-04-22 20:19:48 +02:00
mmio-mod.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
numa_32.c
x86/mm: Drop deprecated DISCONTIGMEM support for 32-bit
2020-05-28 18:34:30 +02:00
numa_64.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
numa_emulation.c
x86/numa: cleanup configuration dependent command-line options
2020-10-13 18:38:27 -07:00
numa_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
numa.c
mm: fix phys_to_target_node() and memory_add_physaddr_to_nid() exports
2020-11-22 10:48:22 -08:00
pf_in.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pf_in.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pgtable_32.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
pgtable.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
physaddr.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +01:00
physaddr.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pkeys.c
mm/vma: introduce VM_ACCESS_FLAGS
2020-04-10 15:36:21 -07:00
pti.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
setup_nx.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
srat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
testmmiotrace.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
tlb.c
x86/membarrier: Get rid of a dubious optimization
2020-12-09 09:37:42 +01:00