diff options
Diffstat (limited to 'libre/qemu-user-static/0006-linux-user-init_guest_commpage-Add-a-comment-about-s.patch')
-rw-r--r-- | libre/qemu-user-static/0006-linux-user-init_guest_commpage-Add-a-comment-about-s.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libre/qemu-user-static/0006-linux-user-init_guest_commpage-Add-a-comment-about-s.patch b/libre/qemu-user-static/0006-linux-user-init_guest_commpage-Add-a-comment-about-s.patch new file mode 100644 index 000000000..4436b7817 --- /dev/null +++ b/libre/qemu-user-static/0006-linux-user-init_guest_commpage-Add-a-comment-about-s.patch @@ -0,0 +1,30 @@ +From ca873a81cc020df0ee0ec072a60678bb83dce9e2 Mon Sep 17 00:00:00 2001 +From: Luke Shumaker <lukeshu@parabola.nu> +Date: Wed, 27 Dec 2017 21:05:29 -0500 +Subject: [PATCH 06/10] linux-user: init_guest_commpage: Add a comment about + size check + +Signed-off-by: Luke Shumaker <lukeshu@parabola.nu> +--- + linux-user/elfload.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/linux-user/elfload.c b/linux-user/elfload.c +index 22f2632dfa..b560f5d6fe 100644 +--- a/linux-user/elfload.c ++++ b/linux-user/elfload.c +@@ -374,6 +374,11 @@ static int init_guest_commpage(unsigned long guest_base, + + /* If the commpage lies within the already allocated guest space, + * then there is no way we can allocate it. ++ * ++ * You may be thinking that that this check is redundant because ++ * we already validated the guest size against MAX_RESERVED_VA; ++ * but if qemu_host_page_mask is unusually large, then ++ * test_page_addr may be lower. + */ + if (test_page_addr >= guest_base + && test_page_addr < (guest_base + guest_size)) { +-- +2.15.1 + |