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Arvind Sankar 0a72e7286c x86/mm/ident_map: Check for errors from ident_pud_init() 
[ Upstream commit 1fcd009102 ]

Commit

  ea3b5e60ce ("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: ea3b5e60ce ("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 11:51:02 +01:00
..
Makefile treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
amdtopology.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
cpu_entry_area.c x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise 2019-11-29 10:10:00 +01:00
debug_pagetables.c x86: mm: no need to check return value of debugfs_create functions 2019-06-03 16:18:12 +02:00
dump_pagetables.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
extable.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
fault.c x86/mm: split vmalloc_sync_all() 2020-03-25 08:25:58 +01:00
highmem_32.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
hugetlbpage.c mm: simplify MEMORY_ISOLATION && COMPACTION || CMA into CONTIG_ALLOC 2019-05-14 09:47:47 -07:00
ident_map.c x86/mm/ident_map: Check for errors from ident_pud_init() 2020-12-30 11:51:02 +01:00
init.c x86/mm: Stop printing BRK addresses 2020-06-22 09:31:08 +02:00
init_32.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
init_64.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
iomap_32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ioremap.c x86/ioremap: Fix CONFIG_EFI=n build 2020-04-01 11:01:59 +02:00
kasan_init_64.c x86/kasan: Fix boot with 5-level paging and KASAN 2019-06-14 16:37:30 +02:00
kaslr.c x86/mm/KASLR: Compute the size of the vmemmap section properly 2019-06-07 23:12:13 +02:00
kmmio.c x86/mm/kmmio: Make the tracer robust against L1TF 2018-08-08 22:28:34 +02:00
mem_encrypt.c fs/core/vmcore: Move sev_active() reference to x86 arch code 2019-08-09 22:52:10 +10:00
mem_encrypt_boot.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mem_encrypt_identity.c x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP 2020-12-16 10:56:58 +01:00
mm_internal.h x86/mm: Do not use set_{pud, pmd}_safe() when splitting a large page 2019-05-08 19:08:35 +02:00
mmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mmio-mod.c x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables 2020-06-07 13:18:51 +02:00
mpx.c signal: Remove task parameter from force_sig 2019-05-27 09:36:28 -05:00
numa.c x86/mm: Fix cpumask_of_node() error condition 2019-09-05 13:03:04 +02:00
numa_32.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
numa_64.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
numa_emulation.c x86, fakenuma: Fix invalid starting node ID 2020-09-09 19:12:28 +02:00
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
pageattr-test.c x86/mm/cpa: Simplify the code after making cpa->vaddr invariant 2018-12-17 18:54:25 +01:00
pageattr.c x86/mm/cpa: Flush direct map alias during cpa 2020-05-27 17:46:32 +02:00
pat.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
pat_internal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pat_rbtree.c augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro 2019-09-25 17:51:39 -07:00
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.c x86/mm: Use the correct function type for native_set_fixmap() 2019-12-31 16:44:04 +01:00
pgtable_32.c x86/mm: Rename flush_tlb_single() and flush_tlb_one() to __flush_tlb_one_[user|kernel]() 2018-02-15 01:15:52 +01:00
physaddr.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
pti.c x86/mm/pti: Do not invoke PTI functions when PTI is disabled 2019-08-29 20:52:53 +02:00
setup_nx.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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 x86/mmiotrace: Lock down the testmmiotrace module 2019-08-19 21:54:16 -07:00
tlb.c x86/membarrier: Get rid of a dubious optimization 2020-12-16 10:56:59 +01:00