This is a note to let you know that I've just added the patch titled
Remove easily user-triggerable BUG from generic_setlease
to the 3.4-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:
remove-easily-user-triggerable-bug-from-generic_setlease.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 8d657eb3b43861064d36241e88d9d61c709f33f0 Mon Sep 17 00:00:00 2001
From: Dave Jones <[email protected]>
Date: Fri, 13 Jul 2012 13:35:36 -0400
Subject: Remove easily user-triggerable BUG from generic_setlease
From: Dave Jones <[email protected]>
commit 8d657eb3b43861064d36241e88d9d61c709f33f0 upstream.
This can be trivially triggered from userspace by passing in something
unexpected.
kernel BUG at fs/locks.c:1468!
invalid opcode: 0000 [#1] SMP
RIP: 0010:generic_setlease+0xc2/0x100
Call Trace:
__vfs_setlease+0x35/0x40
fcntl_setlease+0x76/0x150
sys_fcntl+0x1c6/0x810
system_call_fastpath+0x1a/0x1f
Signed-off-by: Dave Jones <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/locks.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1465,7 +1465,7 @@ int generic_setlease(struct file *filp,
case F_WRLCK:
return generic_add_lease(filp, arg, flp);
default:
- BUG();
+ return -EINVAL;
}
}
EXPORT_SYMBOL(generic_setlease);
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/remove-easily-user-triggerable-bug-from-generic_setlease.patch
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