The patch titled
Subject: ipc/util.c: sysvipc_find_ipc() should increase position index
has been added to the -mm tree. Its filename is
sysvipc_find_ipc-should-increase-position-index.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sysvipc_find_ipc-should-increase-position-index.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sysvipc_find_ipc-should-increase-position-index.patch
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------------------------------------------------------
From: Vasily Averin <vvs@xxxxxxxxxxxxx>
Subject: ipc/util.c: sysvipc_find_ipc() should increase position index
If seq_file .next fuction does not change position index, read after some
lseek can generate unexpected output.
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Link: http://lkml.kernel.org/r/b7a20945-e315-8bb0-21e6-3875c14a8494@xxxxxxxxxxxxx
Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
Acked-by: Waiman Long <longman@xxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: NeilBrown <neilb@xxxxxxxx>
Cc: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/ipc/util.c~sysvipc_find_ipc-should-increase-position-index
+++ a/ipc/util.c
@@ -764,13 +764,13 @@ static struct kern_ipc_perm *sysvipc_fin
total++;
}
+ *new_pos = pos + 1;
if (total >= ids->in_use)
return NULL;
for (; pos < ipc_mni; pos++) {
ipc = idr_find(&ids->ipcs_idr, pos);
if (ipc != NULL) {
- *new_pos = pos + 1;
rcu_read_lock();
ipc_lock_object(ipc);
return ipc;
_
Patches currently in -mm which might be from vvs@xxxxxxxxxxxxx are
seq_read-info-message-about-buggy-next-functions.patch
pstore_ftrace_seq_next-should-increase-position-index.patch
gcov_seq_next-should-increase-position-index.patch
sysvipc_find_ipc-should-increase-position-index.patch
