The patch titled
Subject: scripts/gdb: fix list_for_each
has been added to the -mm tree. Its filename is
scripts-gdb-fix-list_for_each.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/scripts-gdb-fix-list_for_each.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/scripts-gdb-fix-list_for_each.patch
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------------------------------------------------------
From: George Prekas <prekageo@xxxxxxxxxx>
Subject: scripts/gdb: fix list_for_each
If the list is uninitialized (next pointer is NULL), list_for_each gets
stuck in an infinite loop. Print a message and treat list as empty.
Link: https://lkml.kernel.org/r/4ae23bb1-c333-f669-da2d-fa35c4f49018@xxxxxxxxxx
Signed-off-by: George Prekas <prekageo@xxxxxxxxxx>
Reviewed-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/lists.py | 5 +++++
1 file changed, 5 insertions(+)
--- a/scripts/gdb/linux/lists.py~scripts-gdb-fix-list_for_each
+++ a/scripts/gdb/linux/lists.py
@@ -27,6 +27,11 @@ def list_for_each(head):
raise TypeError("Must be struct list_head not {}"
.format(head.type))
+ if head['next'] == 0:
+ gdb.write("list_for_each: Uninitialized list '{}' treated as empty\n"
+ .format(head.address))
+ return
+
node = head['next'].dereference()
while node.address != head.address:
yield node.address
_
Patches currently in -mm which might be from prekageo@xxxxxxxxxx are
scripts-gdb-fix-list_for_each.patch
