From: "Peter Müller" <peter.mueller@ipfire.org>
To: development@lists.ipfire.org
Subject: [PATCH] linux: Disable cachestat() system call
Date: Sun, 22 Sep 2024 18:01:45 +0000 [thread overview]
Message-ID: <20240922180145.835402-1-peter.mueller@ipfire.org> (raw)
[-- Attachment #1: Type: text/plain, Size: 4306 bytes --]
>From the kernel's documentation:
> Enable the cachestat system call, which queries the page
> cache statistics of a file (number of cached pages, dirty
> pages, pages marked for writeback, (recently) evicted pages).
There is no legitimate use-case for this feature in IPFire, and
grsecurity recommends disabling it to cut attack surface.
Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
---
config/kernel/kernel.config.aarch64-ipfire | 2 +-
config/kernel/kernel.config.riscv64-ipfire | 2 +-
config/kernel/kernel.config.x86_64-ipfire | 2 +-
config/rootfiles/common/aarch64/linux | 1 -
config/rootfiles/common/riscv64/linux | 1 -
config/rootfiles/common/x86_64/linux | 1 -
6 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
index 74085de00..b2753cdbf 100644
--- a/config/kernel/kernel.config.aarch64-ipfire
+++ b/config/kernel/kernel.config.aarch64-ipfire
@@ -243,7 +243,7 @@ CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_KCMP=y
CONFIG_RSEQ=y
-CONFIG_CACHESTAT_SYSCALL=y
+# CONFIG_CACHESTAT_SYSCALL is not set
# CONFIG_DEBUG_RSEQ is not set
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_GUEST_PERF_EVENTS=y
diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire
index 451607c17..77487de34 100644
--- a/config/kernel/kernel.config.riscv64-ipfire
+++ b/config/kernel/kernel.config.riscv64-ipfire
@@ -245,7 +245,7 @@ CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_KCMP=y
CONFIG_RSEQ=y
-CONFIG_CACHESTAT_SYSCALL=y
+# CONFIG_CACHESTAT_SYSCALL is not set
# CONFIG_DEBUG_RSEQ is not set
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set
diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
index 6f0f1bfa5..c17757421 100644
--- a/config/kernel/kernel.config.x86_64-ipfire
+++ b/config/kernel/kernel.config.x86_64-ipfire
@@ -264,7 +264,7 @@ CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_KCMP=y
CONFIG_RSEQ=y
-CONFIG_CACHESTAT_SYSCALL=y
+# CONFIG_CACHESTAT_SYSCALL is not set
# CONFIG_DEBUG_RSEQ is not set
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_GUEST_PERF_EVENTS=y
diff --git a/config/rootfiles/common/aarch64/linux b/config/rootfiles/common/aarch64/linux
index 53dedd2f3..98eee80a7 100644
--- a/config/rootfiles/common/aarch64/linux
+++ b/config/rootfiles/common/aarch64/linux
@@ -7608,7 +7608,6 @@ etc/modprobe.d/ipv6.conf
#lib/modules/KVER/build/include/config/BUILD_SALT
#lib/modules/KVER/build/include/config/BUILTIN_RETURN_ADDRESS_STRIPS_PAC
#lib/modules/KVER/build/include/config/CACHEFILES
-#lib/modules/KVER/build/include/config/CACHESTAT_SYSCALL
#lib/modules/KVER/build/include/config/CARL9170
#lib/modules/KVER/build/include/config/CARL9170_HWRNG
#lib/modules/KVER/build/include/config/CARL9170_LEDS
diff --git a/config/rootfiles/common/riscv64/linux b/config/rootfiles/common/riscv64/linux
index dca2c7370..626238714 100644
--- a/config/rootfiles/common/riscv64/linux
+++ b/config/rootfiles/common/riscv64/linux
@@ -6940,7 +6940,6 @@ etc/modprobe.d/ipv6.conf
#lib/modules/KVER/build/include/config/BUILDTIME_TABLE_SORT
#lib/modules/KVER/build/include/config/BUILD_SALT
#lib/modules/KVER/build/include/config/CACHEFILES
-#lib/modules/KVER/build/include/config/CACHESTAT_SYSCALL
#lib/modules/KVER/build/include/config/CADENCE_WATCHDOG
#lib/modules/KVER/build/include/config/CARDBUS
#lib/modules/KVER/build/include/config/CARL9170
diff --git a/config/rootfiles/common/x86_64/linux b/config/rootfiles/common/x86_64/linux
index cecaf36fa..6505e9a54 100644
--- a/config/rootfiles/common/x86_64/linux
+++ b/config/rootfiles/common/x86_64/linux
@@ -7289,7 +7289,6 @@ etc/modprobe.d/ipv6.conf
#lib/modules/KVER/build/include/config/BUILDTIME_TABLE_SORT
#lib/modules/KVER/build/include/config/BUILD_SALT
#lib/modules/KVER/build/include/config/CACHEFILES
-#lib/modules/KVER/build/include/config/CACHESTAT_SYSCALL
#lib/modules/KVER/build/include/config/CADENCE_WATCHDOG
#lib/modules/KVER/build/include/config/CALL_DEPTH_TRACKING
#lib/modules/KVER/build/include/config/CALL_PADDING
--
2.39.5
reply other threads:[~2024-09-22 18:01 UTC|newest]
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