From: Alexander Egorenkov <egorenar@xxxxxxxxxxxxx>
Subject: kdump: append uts_namespace.name offset to VMCOREINFO
The offset of the field 'init_uts_ns.name' has changed since commit
9a56493f6942 ("uts: Use generic ns_common::count").
Make the offset of the field 'uts_namespace.name' available in VMCOREINFO
because tools like 'crash-utility' and 'makedumpfile' must be able to read
it from crash dumps.
Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain
Link: https://lkml.kernel.org/r/20200930102328.396488-1-egorenar@xxxxxxxxxxxxx
Signed-off-by: Alexander Egorenkov <egorenar@xxxxxxxxxxxxx>
Acked-by: lijiang <lijiang@xxxxxxxxxx>
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: "Eric W . Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/admin-guide/kdump/vmcoreinfo.rst | 6 ++++++
kernel/crash_core.c | 1 +
2 files changed, 7 insertions(+)
--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst~kdump-append-uts_namespacename-offset-to-vmcoreinfo
+++ a/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -39,6 +39,12 @@ call.
User-space tools can get the kernel name, host name, kernel release
number, kernel version, architecture name and OS type from it.
+(uts_namespace, name)
+---------------------
+
+Offset of the name's member. Crash Utility and Makedumpfile get
+the start address of the init_uts_ns.name from this.
+
node_online_map
---------------
--- a/kernel/crash_core.c~kdump-append-uts_namespacename-offset-to-vmcoreinfo
+++ a/kernel/crash_core.c
@@ -447,6 +447,7 @@ static int __init crash_save_vmcoreinfo_
VMCOREINFO_PAGESIZE(PAGE_SIZE);
VMCOREINFO_SYMBOL(init_uts_ns);
+ VMCOREINFO_OFFSET(uts_namespace, name);
VMCOREINFO_SYMBOL(node_online_map);
#ifdef CONFIG_MMU
VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
_
