From 234ec1ce7f5e0e5e3a15144902473603965c0ffa Mon Sep 17 00:00:00 2001 From: Patrick Tjin <pattjin@google.com> Date: Tue, 13 Oct 2015 15:35:06 -0700 Subject: [PATCH] arm/configs: hammerhead: remove SysV IPC from kernel System V IPCs are not compliant with Android's application lifecycle because allocated resources are not freeable by the low memory killer. This lead to global kernel resource leakage. For example, there is no way to automatically release a SysV semaphore allocated in the kernel when: - a buggy or malicious process exits - a non-buggy and non-malicious process crashes or is explicitly killed. Killing processes automatically to make room for new ones is an important part of Android's application lifecycle implementation. This means that, even assuming only non-buggy and non-malicious code, it is very likely that over time, the kernel global tables used to implement SysV IPCs will fill up. Bug: 24551430 Bug: 22300191 Signed-off-by: Jeff Vander Stoep <jeffv@google.com> Signed-off-by: Patrick Tjin <pattjin@google.com> Change-Id: Ibaaad7c3d99c509ec360b715323807ebe0027ab0 --- arch/arm/configs/hammerhead_defconfig | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm/configs/hammerhead_defconfig b/arch/arm/configs/hammerhead_defconfig index 1cedf9543aff..0cf23e423ad2 100644 --- a/arch/arm/configs/hammerhead_defconfig +++ b/arch/arm/configs/hammerhead_defconfig @@ -1,7 +1,6 @@ # CONFIG_ARM_PATCH_PHYS_VIRT is not set CONFIG_EXPERIMENTAL=y # CONFIG_SWAP is not set -CONFIG_SYSVIPC=y CONFIG_AUDIT=y CONFIG_RCU_FAST_NO_HZ=y CONFIG_LOG_BUF_SHIFT=19 @@ -14,7 +13,6 @@ CONFIG_CGROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_NAMESPACES=y # CONFIG_UTS_NS is not set -# CONFIG_IPC_NS is not set # CONFIG_USER_NS is not set # CONFIG_PID_NS is not set CONFIG_RELAY=y @@ -59,7 +57,6 @@ CONFIG_MSM_PIL_VENUS=y # CONFIG_MSM_BUSPM_DEV is not set CONFIG_MSM_TZ_LOG=y CONFIG_MSM_RPM_RBCPR_STATS_V2_LOG=y -CONFIG_MSM_RPM_STATS_LOG=y CONFIG_MSM_DIRECT_SCLK_ACCESS=y CONFIG_MSM_EVENT_TIMER=y CONFIG_MSM_BUS_SCALING=y -- GitLab