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kprobes/x86/xen: blacklist non-attachable xen interrupt functions

PATCH Applied Andrea Righi 3 participants 5 messages Dec 10, 2018 – Dec 17, 2018

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x86 Xen hypervisor x86
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Andrea Righi

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#0 lore raw

PATCH 1/1 kprobes/x86/xen: blacklist non-attachable xen interrupt functions

Blacklist symbols in Xen probe-prohibited areas, so that user can see these prohibited symbols in debugfs.

See also: a50480cb6d61.

Signed-off-by Andrea Righi <[email protected]>
---
 arch/x86/xen/xen-asm_64.S | 2 ++
 1 file changed, 2 insertions(+)
arch/x86/xen/xen-asm_64.S +2 -0
index bb1c2da0381d..1e9ef0ba30a5 100644
@@ -12,6 +12,7 @@
 #include <asm/segment.h>
 #include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
+#include <asm/asm.h>
 
 #include <xen/interface/xen.h>
 

@@ -24,6 +25,7 @@ ENTRY(xen_\name)
 	pop %r11
 	jmp  \name
 END(xen_\name)
+_ASM_NOKPROBE(xen_\name)
 .endm
 
 xen_pv_trap divide_error
Signature · 1 line
2.17.1
Acked-by on v1 1/1
#1 lore raw
Quoted 4 lines · On Mon, 10 Dec 2018 16:12:57 +0100 Andrea Righi <[email protected]> wrote:

Blacklist symbols in Xen probe-prohibited areas, so that user can see these prohibited symbols in debugfs.

See also: a50480cb6d61.

Looks good to me, thanks!

Acked-by Masami Hiramatsu <[email protected]>
Quoted 29 lines
Signed-off-by Andrea Righi <[email protected]>
---
 arch/x86/xen/xen-asm_64.S | 2 ++
 1 file changed, 2 insertions(+)
arch/x86/xen/xen-asm_64.S +2 -0
index bb1c2da0381d..1e9ef0ba30a5 100644
@@ -12,6 +12,7 @@
 #include <asm/segment.h>
 #include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
+#include <asm/asm.h>
 
 #include <xen/interface/xen.h>
 

@@ -24,6 +25,7 @@ ENTRY(xen_\name)
 	pop %r11
 	jmp  \name
 END(xen_\name)
+_ASM_NOKPROBE(xen_\name)
 .endm
 
 xen_pv_trap divide_error
Signature · 1 line
2.17.1
Signature · 1 line
Masami Hiramatsu <[email protected]>
Acked-by on v1 1/1
#2 lore raw
In reply to Andrea Righi
Quoted 4 lines · On Mon, 10 Dec 2018 16:12:57 +0100 Andrea Righi <[email protected]> wrote:

Blacklist symbols in Xen probe-prohibited areas, so that user can see these prohibited symbols in debugfs.

See also: a50480cb6d61.

Looks good to me, thanks!

Acked-by Masami Hiramatsu <[email protected]>
Quoted 29 lines
Signed-off-by Andrea Righi <[email protected]>
---
 arch/x86/xen/xen-asm_64.S | 2 ++
 1 file changed, 2 insertions(+)
arch/x86/xen/xen-asm_64.S +2 -0
index bb1c2da0381d..1e9ef0ba30a5 100644
@@ -12,6 +12,7 @@
 #include <asm/segment.h>
 #include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
+#include <asm/asm.h>
 
 #include <xen/interface/xen.h>
 

@@ -24,6 +25,7 @@ ENTRY(xen_\name)
 	pop %r11
 	jmp  \name
 END(xen_\name)
+_ASM_NOKPROBE(xen_\name)
 .endm
 
 xen_pv_trap divide_error
Signature · 1 line
2.17.1
Signature · 6 lines
Masami Hiramatsu <[email protected]>

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