diff options
| author | Joerg Roedel <jroedel@suse.de> | 2020-09-07 15:15:22 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-07 19:45:25 +0200 |
| commit | 4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7 (patch) | |
| tree | 80d7b2d0766bdc8b6161b72105e63722861ef6a1 /arch/x86/boot | |
| parent | c2a0304a286f386e45cea3f4b0617f0813de67fd (diff) | |
| download | linux-4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7.tar.gz linux-4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7.tar.bz2 linux-4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7.zip | |
x86/boot/compressed/64: Check return value of kernel_ident_mapping_init()
The function can fail to create an identity mapping, check for that
and bail out if it happens.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-22-joro@8bytes.org
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/ident_map_64.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/ident_map_64.c b/arch/x86/boot/compressed/ident_map_64.c index b4f2a5f503cd..aa91bebc0fe9 100644 --- a/arch/x86/boot/compressed/ident_map_64.c +++ b/arch/x86/boot/compressed/ident_map_64.c @@ -91,6 +91,8 @@ static struct x86_mapping_info mapping_info; */ static void add_identity_map(unsigned long start, unsigned long end) { + int ret; + /* Align boundary to 2M. */ start = round_down(start, PMD_SIZE); end = round_up(end, PMD_SIZE); @@ -98,8 +100,9 @@ static void add_identity_map(unsigned long start, unsigned long end) return; /* Build the mapping. */ - kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt, - start, end); + ret = kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt, start, end); + if (ret) + error("Error: kernel_ident_mapping_init() failed\n"); } /* Locates and clears a region for a new top level page table. */ |