The patch titled
input/mouse/sermouse: fix memleak and potential buffer overflow
has been added to the -mm tree. Its filename is
input-mouse-sermouse-fix-memleak-and-potential-buffer-overflow.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: input/mouse/sermouse: fix memleak and potential buffer overflow
From: Wouter Paesen <wouter@xxxxxxxxxxxxx>
While strolling trough the sermouse driver for some example code, I noticed
2 strange things happening there:
* In the sermouse_connect function an input device structure is
allocated (input_allocate_device), which is not deallocated
in the sermouse_disconnect function.
If I understand this correctly someone repeatedly connecting and
disconnecting the mouse would leak input_dev structures.
* In the sermouse_connect function the phys member of the sermouse
structure (32 characters) is initialised with :
sprintf(sermouse->phys, "%s/input0", serio->phys);
Because serio->phys is also a 32 character field the sprintf could
result in 39 characters being written to the sermouse->phys.
If my understanding of both these concepts is correct, this is a patch
to fix the problems.
Signed-off-by: Wouter Paesen <wouter@xxxxxxxxxxxxx>
Cc: Dmitry Torokhov <dtor_core@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/input/mouse/sermouse.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN drivers/input/mouse/sermouse.c~input-mouse-sermouse-fix-memleak-and-potential-buffer-overflow drivers/input/mouse/sermouse.c
--- a/drivers/input/mouse/sermouse.c~input-mouse-sermouse-fix-memleak-and-potential-buffer-overflow
+++ a/drivers/input/mouse/sermouse.c
@@ -53,7 +53,7 @@ struct sermouse {
unsigned char count;
unsigned char type;
unsigned long last;
- char phys[32];
+ char phys[39];
};
/*
@@ -233,6 +233,7 @@ static void sermouse_disconnect(struct s
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_unregister_device(sermouse->dev);
+ input_free_device(sermouse->dev);
kfree(sermouse);
}
_
Patches currently in -mm which might be from wouter@xxxxxxxxxxxxx are
input-mouse-sermouse-fix-memleak-and-potential-buffer-overflow.patch
-
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