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Don't disable slub/slab merging via kernel command line, but by default

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I have a sneaking suspicion that the length of some device command lines is
causing boot issues.
eg. with the recent additions, klte boots fine, but recovery doesn't, maybe
bootloader is adding more flags, exceeding a limit?

Signed-off-by: Tad <tad@spotco.us>
This commit is contained in:
Tad 2021-09-15 09:57:47 -04:00
parent 3bb1199c34
commit 083e2048f8
2 changed files with 8 additions and 3 deletions
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9
Scripts/Common/Functions.sh
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@ -493,8 +493,8 @@ export -f hardenUserdata;
hardenBootArgs() {
cd "$DOS_BUILD_BASE$1";
#Unavailable: kpti=on pti=on (4.15) page_alloc.shuffle=1 (5.2) init_on_alloc=1 (5.3) init_on_free=1 (5.3) lockdown=confidentiality (5.4)
# 3.18 4.4
sed -i 's/BOARD_KERNEL_CMDLINE := /BOARD_KERNEL_CMDLINE := slub_debug=FZP slub_nomerge slab_nomerge page_poison=1 /' BoardConfig*.mk */BoardConfig*.mk &>/dev/null || true;
# 4.4
sed -i 's/BOARD_KERNEL_CMDLINE := /BOARD_KERNEL_CMDLINE := slub_debug=FZP page_poison=1 /' BoardConfig*.mk */BoardConfig*.mk &>/dev/null || true;
echo "Hardened kernel command line arguments for $1";
cd "$DOS_BUILD_BASE";
}
@ -812,6 +812,11 @@ hardenDefconfig() {
#MSM_DLOAD_MODE can't be disabled as it breaks compile
sed -i 's/set_dload_mode(in_panic)/set_dload_mode(0)/' arch/arm/mach-msm/restart.c &>/dev/null || true;
#Disable slub/slab merging
sed -i 's/static int slub_nomerge;/static int slub_nomerge = 1;/' mm/slub.c &>/dev/null || true; #2.6.22-3.17
sed -i 's/static int slab_nomerge;/static int slab_nomerge = 1;/' mm/slab_common.c &>/dev/null || true; #3.18-4.12
sed -i 's/static bool slab_nomerge = !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT);/static bool slab_nomerge = true;/' mm/slab_common.c &>/dev/null || true; #4.13+
editKernelLocalversion "-dos";
echo "Hardened defconfig for $1";