This is a note to let you know that I've just added the patch titled
s390: discard .interp section
to the 6.2-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:
s390-discard-.interp-section.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e9c9cb90e76ffaabcc7ca8f275d9e82195fd6367 Mon Sep 17 00:00:00 2001
From: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Date: Mon, 23 Jan 2023 22:50:32 +0100
Subject: s390: discard .interp section
From: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
commit e9c9cb90e76ffaabcc7ca8f275d9e82195fd6367 upstream.
When debugging vmlinux with QEMU + GDB, the following GDB error may
occur:
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint -1.
Cannot access memory at address 0xffffffffffff95c0
Command aborted.
(gdb)
The reason is that, when .interp section is present, GDB tries to
locate the file specified in it in memory and put a number of
breakpoints there (see enable_break() function in gdb/solib-svr4.c).
Sometimes GDB finds a bogus location that matches its heuristics,
fails to set a breakpoint and stops. This makes further debugging
impossible.
The .interp section contains misleading information anyway (vmlinux
does not need ld.so), so fix by discarding it.
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/vmlinux.lds.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -228,5 +228,6 @@ SECTIONS
DISCARDS
/DISCARD/ : {
*(.eh_frame)
+ *(.interp)
}
}
Patches currently in stable-queue which might be from iii@xxxxxxxxxxxxx are
queue-6.2/libbpf-fix-alen-calculation-in-libbpf_nla_dump_error.patch
queue-6.2/selftests-bpf-fix-xdp_do_redirect-on-s390x.patch
queue-6.2/s390-discard-.interp-section.patch
queue-6.2/selftests-bpf-initialize-tc-in-xdp_synproxy.patch
queue-6.2/s390-bpf-add-expoline-to-tail-calls.patch
queue-6.2/selftests-bpf-fix-out-of-srctree-build.patch
