[patch 114/118] scripts/gdb: fix list_for_each

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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
_




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux