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https://bugs.gentoo.org/949654
Quick downstream fix for now. Hasn't been sent to upstream(s) yet
as of the writing of this, but believe it should happen soon.
--- a/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+++ b/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
@@ -36,4 +36,8 @@
#include "sandbox/linux/system_headers/linux_time.h"
+#if !defined(MAP_DROPPABLE)
+#define MAP_DROPPABLE 0x08 // Zero memory under memory pressure.
+#endif
+
#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)) && \
!defined(__arm__) && !defined(__aarch64__) && \
@@ -239,5 +243,5 @@
const uint64_t kAllowedMask = MAP_SHARED | MAP_PRIVATE | MAP_ANONYMOUS |
MAP_STACK | MAP_NORESERVE | MAP_FIXED |
- MAP_DENYWRITE | MAP_LOCKED |
+ MAP_DENYWRITE | MAP_LOCKED | MAP_DROPPABLE |
kArchSpecificAllowedMask;
const Arg<int> flags(3);
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