Jisheng Zhang e69012400b arm64: mm: don't use CON and BLK mapping if KFENCE is enabled ... When we added KFENCE support for arm64, we intended that it would force the entire linear map to be mapped at page granularity, but we only enforced this in arch_add_memory() and not in map_mem(), so memory mapped at boot time can be mapped at a larger granularity. When booting a kernel with KFENCE=y and RODATA_FULL=n, this results in the following WARNING at boot: [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at mm/memory.c:2462 apply_to_pmd_range+0xec/0x190 [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc1+ #10 [ 0.000000] Hardware name: linux,dummy-virt (DT) [ 0.000000] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO BTYPE=--) [ 0.000000] pc : apply_to_pmd_range+0xec/0x190 [ 0.000000] lr : __apply_to_page_range+0x94/0x170 [ 0.000000] sp : ffffffc010573e20 [ 0.000000] x29: ffffffc010573e20 x28: ffffff801f400000 x27: ffffff801f401000 [ 0.000000] x26: 0000000000000001 x25: ffffff801f400fff x24: ffffffc010573f28 [ 0.000000] x23: ffffffc01002b710 x22: ffffffc0105fa450 x21: ffffffc010573ee4 [ 0.000000] x20: ffffff801fffb7d0 x19: ffffff801f401000 x18: 00000000fffffffe [ 0.000000] x17: 000000000000003f x16: 000000000000000a x15: ffffffc01060b940 [ 0.000000] x14: 0000000000000000 x13: 0098968000000000 x12: 0000000098968000 [ 0.000000] x11: 0000000000000000 x10: 0000000098968000 x9 : 0000000000000001 [ 0.000000] x8 : 0000000000000000 x7 : ffffffc010573ee4 x6 : 0000000000000001 [ 0.000000] x5 : ffffffc010573f28 x4 : ffffffc01002b710 x3 : 0000000040000000 [ 0.000000] x2 : ffffff801f5fffff x1 : 0000000000000001 x0 : 007800005f400705 [ 0.000000] Call trace: [ 0.000000] apply_to_pmd_range+0xec/0x190 [ 0.000000] __apply_to_page_range+0x94/0x170 [ 0.000000] apply_to_page_range+0x10/0x20 [ 0.000000] __change_memory_common+0x50/0xdc [ 0.000000] set_memory_valid+0x30/0x40 [ 0.000000] kfence_init_pool+0x9c/0x16c [ 0.000000] kfence_init+0x20/0x98 [ 0.000000] start_kernel+0x284/0x3f8 Fixes: 840b239863 ("arm64, kfence: enable KFENCE for ARM64") Cc: <stable@vger.kernel.org> # 5.12.x Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Marco Elver <elver@google.com> Tested-by: Marco Elver <elver@google.com> Link: https://lore.kernel.org/r/20210525104551.2ec37f77@xhacker.debian Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2021-05-25 14:04:38 +01:00
..
Makefile	RISC-V Patches for the 5.12 Merge Window	2021-02-26 10:28:35 -08:00
cache.S	arm64: mm: Use modern annotations for assembly functions	2020-01-08 12:23:38 +00:00
context.c	arm64: mm: Pin down ASIDs for sharing mm with devices	2020-09-28 22:15:38 +01:00
copypage.c	arm64: mte: reset the page tag in page->flags	2020-12-22 12:55:07 -08:00
dma-mapping.c	xen/arm: introduce XENFEAT_direct_mapped and XENFEAT_not_direct_mapped	2021-04-23 11:33:50 +02:00
extable.c	arm64: Improve diagnostics when trapping BRK with FAULT_BRK_IMM	2020-09-18 16:35:54 +01:00
fault.c	arm64: Support execute-only permissions with Enhanced PAN	2021-03-26 09:37:23 +00:00
flush.c	arm64: Fix race condition on PG_dcache_clean in __sync_icache_dcache()	2021-05-14 17:11:16 +01:00
hugetlbpage.c	hugetlb/userfaultfd: forbid huge pmd sharing when uffd enabled	2021-05-05 11:27:20 -07:00
init.c	arm64: do not set SWIOTLB_NO_FORCE when swiotlb is required	2021-05-14 15:52:08 +02:00
ioremap.c	mm: remove unneeded includes of <asm/pgalloc.h>	2020-08-07 11:33:26 -07:00
kasan_init.c	Merge branches 'for-next/misc', 'for-next/kselftest', 'for-next/xntable', 'for-next/vdso', 'for-next/fiq', 'for-next/epan', 'for-next/kasan-vmalloc', 'for-next/fgt-boot-init', 'for-next/vhe-only' and 'for-next/neon-softirqs-disabled', remote-tracking branch 'arm64/for-next/perf' into for-next/core	2021-04-15 14:00:38 +01:00
mmap.c	arm64: Include linux/io.h in mm/mmap.c	2021-01-27 12:52:16 +00:00
mmu.c	arm64: mm: don't use CON and BLK mapping if KFENCE is enabled	2021-05-25 14:04:38 +01:00
mteswap.c	arm64: mte: reset the page tag in page->flags	2020-12-22 12:55:07 -08:00
pageattr.c	arch, mm: make kernel_page_present() always available	2020-12-15 12:13:43 -08:00
pgd.c	mm: consolidate pgtable_cache_init() and pgd_cache_init()	2019-09-24 15:54:09 -07:00
physaddr.c	arm64: Do not pass tagged addresses to __is_lm_address()	2021-02-02 17:44:47 +00:00
proc.S	arm64: mte: initialize RGSR_EL1.SEED in __cpu_setup	2021-05-10 18:56:25 +01:00
ptdump.c	arm64: Force SPARSEMEM_VMEMMAP as the only memory management model	2021-04-23 14:18:21 +01:00
ptdump_debugfs.c	arm64: Add __init section marker to some functions	2021-04-08 17:45:10 +01:00
trans_pgd.c	arm64: trans_pgd: hibernate: idmap the single page that holds the copy page routines	2021-01-27 15:41:12 +00:00