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%3Ba=su...

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@vger.kernel.org know about it.

From 3ffdeb1a02be3086f1411a15c5b9c481fa28e21f Mon Sep 17 00:00:00 2001

From: Josh Poimboeuf jpoimboe@redhat.com Date: Sun, 31 Dec 2017 10:18:07 -0600 Subject: x86/dumpstack: Print registers for first stack frame MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

From: Josh Poimboeuf jpoimboe@redhat.com

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@amacapital.net Tested-by: Alexander Tsoy alexander@tsoy.me Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Cc: Andy Lutomirski luto@kernel.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Toralf Förster toralf.foerster@gmx.de Fixes: 3b3fa11bc700 ("x86/dumpstack: Print any pt_regs found on the stack") Link: http://lkml.kernel.org/r/396f84491d2f0ef64eda4217a2165f5712f6a115.1514736742... Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- 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@redhat.com 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