This is a note to let you know that I've just added the patch titled xtensa: fix return_address to the 4.19-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: xtensa-fix-return_address.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ada770b1e74a77fff2d5f539bf6c42c25f4784db Mon Sep 17 00:00:00 2001 From: Max Filippov <jcmvbkbc@xxxxxxxxx> Date: Thu, 4 Apr 2019 11:08:40 -0700 Subject: xtensa: fix return_address From: Max Filippov <jcmvbkbc@xxxxxxxxx> commit ada770b1e74a77fff2d5f539bf6c42c25f4784db upstream. return_address returns the address that is one level higher in the call stack than requested in its argument, because level 0 corresponds to its caller's return address. Use requested level as the number of stack frames to skip. This fixes the address reported by might_sleep and friends. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/xtensa/kernel/stacktrace.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/arch/xtensa/kernel/stacktrace.c +++ b/arch/xtensa/kernel/stacktrace.c @@ -253,10 +253,14 @@ static int return_address_cb(struct stac return 1; } +/* + * level == 0 is for the return address from the caller of this function, + * not from this function itself. + */ unsigned long return_address(unsigned level) { struct return_addr_data r = { - .skip = level + 1, + .skip = level, }; walk_stackframe(stack_pointer(NULL), return_address_cb, &r); return r.addr; Patches currently in stable-queue which might be from jcmvbkbc@xxxxxxxxx are queue-4.19/xtensa-fix-return_address.patch