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| author |   Masami Ichikawa <masami256@gmail.com> | 2013-12-25 23:47:37 +0900 |
|---|---|---|
| committer |   Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-01-17 10:57:44 +0200 |
| commit | 46862145d4a24875e5ae5262f67f48ed1b317533 (patch) | |
| tree | 3006b80fbcfe3479364988a73edcfccef2ff200a /drivers/video/console | |
| parent | fbcon: trivial optimization for fbcon_exit (diff) | |
| download | linux-dev-46862145d4a24875e5ae5262f67f48ed1b317533.tar.xz linux-dev-46862145d4a24875e5ae5262f67f48ed1b317533.zip | |
fbcon: Fix memory leak in fbcon_exit().
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@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/console')
| -rw-r--r-- | drivers/video/console/fbcon.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index f39931f818b8..4e39291ac8b4 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -3563,6 +3563,7 @@ 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; } |