This is a note to let you know that I've just added the patch titled
x86/dumpstack: Print registers for first stack frame
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-dumpstack-print-registers-for-first-stack-frame.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3ffdeb1a02be3086f1411a15c5b9c481fa28e21f Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Date: Sun, 31 Dec 2017 10:18:07 -0600
Subject: x86/dumpstack: Print registers for first stack frame
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From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
commit 3ffdeb1a02be3086f1411a15c5b9c481fa28e21f upstream.
In the stack dump code, if the frame after the starting pt_regs is also
a regs frame, the registers don't get printed. Fix that.
Reported-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Tested-by: Alexander Tsoy <alexander@xxxxxxx>
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Toralf Förster <toralf.foerster@xxxxxx>
Fixes: 3b3fa11bc700 ("x86/dumpstack: Print any pt_regs found on the stack")
Link: http://lkml.kernel.org/r/396f84491d2f0ef64eda4217a2165f5712f6a115.1514736742.git.jpoimboe@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/dumpstack.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -115,6 +115,7 @@ void show_trace_log_lvl(struct task_stru
unwind_start(&state, task, regs, stack);
stack = stack ? : get_stack_pointer(task, regs);
+ regs = unwind_get_entry_regs(&state, &partial);
/*
* Iterate through the stacks, starting with the current stack pointer.
@@ -132,7 +133,7 @@ void show_trace_log_lvl(struct task_stru
* - hardirq stack
* - entry stack
*/
- for (regs = NULL; stack; stack = PTR_ALIGN(stack_info.next_sp, sizeof(long))) {
+ for ( ; stack; stack = PTR_ALIGN(stack_info.next_sp, sizeof(long))) {
const char *stack_name;
if (get_stack_info(stack, task, &stack_info, &visit_mask)) {
Patches currently in stable-queue which might be from jpoimboe@xxxxxxxxxx are
queue-4.14/x86-dumpstack-print-registers-for-first-stack-frame.patch
queue-4.14/x86-process-define-cpu_tss_rw-in-same-section-as-declaration.patch
queue-4.14/x86-dumpstack-fix-partial-register-dumps.patch