On 2013-12-25 16:47, Masami Ichikawa wrote: > kmemleak reported a memory leak as below. > > unreferenced object 0xffff880036ca84c0 (size 16): > comm "swapper/0", pid 1, jiffies 4294877407 (age 4434.633s) > hex dump (first 16 bytes): > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ................ > backtrace: > [<ffffffff814ed01e>] kmemleak_alloc+0x4e/0xb0 > [<ffffffff8118913c>] __kmalloc+0x1fc/0x290 > [<ffffffff81302c9e>] bit_cursor+0x24e/0x6c0 > [<ffffffff812ff2f4>] fbcon_cursor+0x154/0x1d0 > [<ffffffff813675d8>] hide_cursor+0x28/0xa0 > [<ffffffff81368acf>] update_region+0x6f/0x90 > [<ffffffff81300268>] fbcon_switch+0x518/0x550 > [<ffffffff813695b9>] redraw_screen+0x189/0x240 > [<ffffffff8136a0e0>] do_bind_con_driver+0x360/0x380 > [<ffffffff8136a6e4>] do_take_over_console+0x114/0x1c0 > [<ffffffff812fdc83>] do_fbcon_takeover+0x63/0xd0 > [<ffffffff813023e5>] fbcon_event_notify+0x605/0x720 > [<ffffffff81501dcc>] notifier_call_chain+0x4c/0x70 > [<ffffffff81087f8d>] __blocking_notifier_call_chain+0x4d/0x70 > [<ffffffff81087fc6>] blocking_notifier_call_chain+0x16/0x20 > [<ffffffff812f201b>] fb_notifier_call_chain+0x1b/0x20 > > In this case ops->cursor_state.mask is allocated in bit_cursor() but > not freed in fbcon_exit(). So, fbcon_exit() needs to free buffer in its > process. > In the case, fbcon_exit() was called from fbcon_deinit() when driver > called remove_conflicting_framebuffers(). > > Signed-off-by: Masami Ichikawa <masami256@xxxxxxxxx> > --- > drivers/video/console/fbcon.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c > index cd8a802..4f02375 100644 > --- a/drivers/video/console/fbcon.c > +++ b/drivers/video/console/fbcon.c > @@ -3561,6 +3561,7 @@ static void fbcon_exit(void) > > fbcon_del_cursor_timer(info); > kfree(ops->cursor_src); > + kfree(ops->cursor_state.mask); > kfree(info->fbcon_par); > info->fbcon_par = NULL; > } > Thanks, queued for 3.14. Tomi
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