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authorLinus Torvalds <torvalds@linux-foundation.org>2019-02-02 03:54:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-02-02 03:54:25 +0300
commit8b050fe42d8ad1a2219201ba6d773e5b0eff1a29 (patch)
tree9233f2331a440712a3d353cbb8a22205a8cad7c0 /arch
parent33640d718c5ec9dccdeea49fd23bd9acfc537ce7 (diff)
parentf7daa9c8fd191724b9ab9580a7be55cd1a67d799 (diff)
downloadlinux-8b050fe42d8ad1a2219201ba6d773e5b0eff1a29.tar.xz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon: "Although we're still debugging a few minor arm64-specific issues in mainline, I didn't want to hold this lot up in the meantime. We've got an additional KASLR fix after the previous one wasn't quite complete, a fix for a performance regression when mapping executable pages into userspace and some fixes for kprobe blacklisting. All candidates for stable. Summary: - Fix module loading when KASLR is configured but disabled at runtime - Fix accidental IPI when mapping user executable pages - Ensure hyp-stub and KVM world switch code cannot be kprobed" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: hibernate: Clean the __hyp_text to PoC after resume arm64: hyp-stub: Forbid kprobing of the hyp-stub arm64: kprobe: Always blacklist the KVM world-switch code arm64: kaslr: ensure randomized quantities are clean also when kaslr is off arm64: Do not issue IPIs for user executable ptes
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/hibernate.c4
-rw-r--r--arch/arm64/kernel/hyp-stub.S2
-rw-r--r--arch/arm64/kernel/kaslr.c1
-rw-r--r--arch/arm64/kernel/probes/kprobes.c6
-rw-r--r--arch/arm64/mm/flush.c6
5 files changed, 14 insertions, 5 deletions
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 29cdc99688f3..9859e1178e6b 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -299,8 +299,10 @@ int swsusp_arch_suspend(void)
dcache_clean_range(__idmap_text_start, __idmap_text_end);
/* Clean kvm setup code to PoC? */
- if (el2_reset_needed())
+ if (el2_reset_needed()) {
dcache_clean_range(__hyp_idmap_text_start, __hyp_idmap_text_end);
+ dcache_clean_range(__hyp_text_start, __hyp_text_end);
+ }
/* make the crash dump kernel image protected again */
crash_post_resume();
diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S
index e1261fbaa374..17f325ba831e 100644
--- a/arch/arm64/kernel/hyp-stub.S
+++ b/arch/arm64/kernel/hyp-stub.S
@@ -28,6 +28,8 @@
#include <asm/virt.h>
.text
+ .pushsection .hyp.text, "ax"
+
.align 11
ENTRY(__hyp_stub_vectors)
diff --git a/arch/arm64/kernel/kaslr.c b/arch/arm64/kernel/kaslr.c
index ba6b41790fcd..b09b6f75f759 100644
--- a/arch/arm64/kernel/kaslr.c
+++ b/arch/arm64/kernel/kaslr.c
@@ -88,6 +88,7 @@ u64 __init kaslr_early_init(u64 dt_phys)
* we end up running with module randomization disabled.
*/
module_alloc_base = (u64)_etext - MODULES_VSIZE;
+ __flush_dcache_area(&module_alloc_base, sizeof(module_alloc_base));
/*
* Try to map the FDT early. If this fails, we simply bail,
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 2a5b338b2542..f17afb99890c 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -478,13 +478,13 @@ bool arch_within_kprobe_blacklist(unsigned long addr)
addr < (unsigned long)__entry_text_end) ||
(addr >= (unsigned long)__idmap_text_start &&
addr < (unsigned long)__idmap_text_end) ||
+ (addr >= (unsigned long)__hyp_text_start &&
+ addr < (unsigned long)__hyp_text_end) ||
!!search_exception_tables(addr))
return true;
if (!is_kernel_in_hyp_mode()) {
- if ((addr >= (unsigned long)__hyp_text_start &&
- addr < (unsigned long)__hyp_text_end) ||
- (addr >= (unsigned long)__hyp_idmap_text_start &&
+ if ((addr >= (unsigned long)__hyp_idmap_text_start &&
addr < (unsigned long)__hyp_idmap_text_end))
return true;
}
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 30695a868107..5c9073bace83 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -33,7 +33,11 @@ void sync_icache_aliases(void *kaddr, unsigned long len)
__clean_dcache_area_pou(kaddr, len);
__flush_icache_all();
} else {
- flush_icache_range(addr, addr + len);
+ /*
+ * Don't issue kick_all_cpus_sync() after I-cache invalidation
+ * for user mappings.
+ */
+ __flush_icache_range(addr, addr + len);
}
}