The following commit has been merged into the x86/seves branch of tip: Commit-ID: 4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7 Gitweb: https://git.kernel.org/tip/4b3fdca64a7e8ad90c87cad1fbc6991471f48dc7 Author: Joerg Roedel <[email protected]> AuthorDate: Mon, 07 Sep 2020 15:15:22 +02:00 Committer: Borislav Petkov <[email protected]> CommitterDate: Mon, 07 Sep 2020 19:45:25 +02:00
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 <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- arch/x86/boot/compressed/ident_map_64.c | 7 +++++-- 1 file 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 b4f2a5f..aa91beb 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. */
