Anders Roxell 262522ccef arm64: kprobe: make page to RO mode when allocate it ... [ Upstream commit 966866892c ] Commit 1404d6f13e ("arm64: dump: Add checking for writable and exectuable pages") has successfully identified code that leaves a page with W+X permissions. [ 3.245140] arm64/mm: Found insecure W+X mapping at address (____ptrval____)/0xffff000000d90000 [ 3.245771] WARNING: CPU: 0 PID: 1 at ../arch/arm64/mm/dump.c:232 note_page+0x410/0x420 [ 3.246141] Modules linked in: [ 3.246653] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.0-rc5-next-20180928-00001-ge70ae259b853-dirty #62 [ 3.247008] Hardware name: linux,dummy-virt (DT) [ 3.247347] pstate: 80000005 (Nzcv daif -PAN -UAO) [ 3.247623] pc : note_page+0x410/0x420 [ 3.247898] lr : note_page+0x410/0x420 [ 3.248071] sp : ffff00000804bcd0 [ 3.248254] x29: ffff00000804bcd0 x28: ffff000009274000 [ 3.248578] x27: ffff00000921a000 x26: ffff80007dfff000 [ 3.248845] x25: ffff0000093f5000 x24: ffff000009526f6a [ 3.249109] x23: 0000000000000004 x22: ffff000000d91000 [ 3.249396] x21: ffff000000d90000 x20: 0000000000000000 [ 3.249661] x19: ffff00000804bde8 x18: 0000000000000400 [ 3.249924] x17: 0000000000000000 x16: 0000000000000000 [ 3.250271] x15: ffffffffffffffff x14: 295f5f5f5f6c6176 [ 3.250594] x13: 7274705f5f5f5f28 x12: 2073736572646461 [ 3.250941] x11: 20746120676e6970 x10: 70616d20582b5720 [ 3.251252] x9 : 6572756365736e69 x8 : 3039643030303030 [ 3.251519] x7 : 306666666678302f x6 : ffff0000095467b2 [ 3.251802] x5 : 0000000000000000 x4 : 0000000000000000 [ 3.252060] x3 : 0000000000000000 x2 : ffffffffffffffff [ 3.252323] x1 : 4d151327adc50b00 x0 : 0000000000000000 [ 3.252664] Call trace: [ 3.252953] note_page+0x410/0x420 [ 3.253186] walk_pgd+0x12c/0x238 [ 3.253417] ptdump_check_wx+0x68/0xf8 [ 3.253637] mark_rodata_ro+0x68/0x98 [ 3.253847] kernel_init+0x38/0x160 [ 3.254103] ret_from_fork+0x10/0x18 kprobes allocates a writable executable page with module_alloc() in order to store executable code. Reworked to that when allocate a page it sets mode RO. Inspired by commit 63fef14fc9 ("kprobes/x86: Make insn buffer always ROX and use text_poke()"). Suggested-by: Arnd Bergmann <arnd@arndb.de> Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Anders Roxell <anders.roxell@linaro.org> [catalin.marinas@arm.com: removed unnecessary casts] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-11-27 16:12:58 +01:00
..
alpha	arch/alpha, termios: implement BOTHER, IBSHIFT and termios2	2018-11-21 09:19:20 +01:00
arc	ARC: clone syscall to setp r25 as thread pointer	2018-10-05 14:33:29 -07:00
arm	ARM: 8809/1: proc-v7: fix Thumb annotation of cpu_v7_hvc_switch_mm	2018-11-21 09:19:18 +01:00
arm64	arm64: kprobe: make page to RO mode when allocate it	2018-11-27 16:12:58 +01:00
c6x	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
h8300	Kbuild updates for v4.19 (2nd)	2018-08-25 13:40:38 -07:00
hexagon	hexagon: modify ffs() and fls() to return int	2018-09-10 19:42:15 -05:00
ia64	ia64: Fix allnoconfig section mismatch for ioc_init/ioc_iommu_info	2018-08-22 14:12:47 -07:00
m68k	crypto: speck - remove Speck	2018-11-13 11:08:46 -08:00
microblaze	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
mips	MIPS: Loongson-3: Fix BRIDGE irq delivery problem	2018-11-21 09:19:15 +01:00
nds32	nds32: linker script: GCOV kernel may refers data in __exit	2018-09-05 10:16:26 +08:00
nios2	nios2: kconfig: remove duplicate DEBUG_STACK_USAGE symbol defintions	2018-08-27 09:47:20 +08:00
openrisc	OpenRISC updates for 4.19	2018-08-23 14:09:37 -07:00
parisc	parisc: Fix exported address of os_hpmc handler	2018-11-13 11:08:18 -08:00
powerpc	Revert "powerpc/8xx: Use L1 entry APG to handle _PAGE_ACCESSED for CONFIG_SWAP"	2018-11-21 09:19:18 +01:00
riscv	RISCV: Fix end PFN for low memory	2018-10-02 12:50:01 -07:00
s390	crypto: speck - remove Speck	2018-11-13 11:08:46 -08:00
sh	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
sparc	sparc64: Wire up compat getpeername and getsockname.	2018-11-04 14:50:54 +01:00
um	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
unicore32	mm: convert return type of handle_mm_fault() caller to vm_fault_t	2018-08-17 16:20:28 -07:00
x86	Revert "x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation"	2018-11-23 08:17:07 +01:00
xtensa	xtensa: fix boot parameters address translation	2018-11-21 09:19:16 +01:00
.gitignore
Kconfig	Merge branch 'tlb-fixes'	2018-08-23 14:55:01 -07:00