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libertas_tf: Fix possible memory leak in probe and disconnect
author
Wang Hai
<wanghai38@huawei.com>
Wed, 20 Oct 2021 12:03:44 +0000
(20:03 +0800)
committer
Kalle Valo
<kvalo@codeaurora.org>
Wed, 27 Oct 2021 07:32:21 +0000
(10:32 +0300)
I got memory leak as follows when doing fault injection test:
unreferenced object 0xffff88810a2ddc00 (size 512):
comm "kworker/6:1", pid 176, jiffies
4295009893
(age 757.220s)
hex dump (first 32 bytes):
00 50 05 18 81 88 ff ff 00 00 00 00 00 00 00 00 .P..............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<
ffffffff8167939c
>] slab_post_alloc_hook+0x9c/0x490
[<
ffffffff8167f627
>] kmem_cache_alloc_trace+0x1f7/0x470
[<
ffffffffa02a1530
>] if_usb_probe+0x60/0x37c [libertas_tf_usb]
[<
ffffffffa022668a
>] usb_probe_interface+0x1aa/0x3c0 [usbcore]
[<
ffffffff82b59630
>] really_probe+0x190/0x480
[<
ffffffff82b59a19
>] __driver_probe_device+0xf9/0x180
[<
ffffffff82b59af3
>] driver_probe_device+0x53/0x130
[<
ffffffff82b5a075
>] __device_attach_driver+0x105/0x130
[<
ffffffff82b55949
>] bus_for_each_drv+0x129/0x190
[<
ffffffff82b593c9
>] __device_attach+0x1c9/0x270
[<
ffffffff82b5a250
>] device_initial_probe+0x20/0x30
[<
ffffffff82b579c2
>] bus_probe_device+0x142/0x160
[<
ffffffff82b52e49
>] device_add+0x829/0x1300
[<
ffffffffa02229b1
>] usb_set_configuration+0xb01/0xcc0 [usbcore]
[<
ffffffffa0235c4e
>] usb_generic_driver_probe+0x6e/0x90 [usbcore]
[<
ffffffffa022641f
>] usb_probe_device+0x6f/0x130 [usbcore]
cardp is missing being freed in the error handling path of the probe
and the path of the disconnect, which will cause memory leak.
This patch adds the missing kfree().
Fixes:
c305a19a0d0a
("libertas_tf: usb specific functions")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link:
https://lore.kernel.org/r/20211020120345.2016045-2-wanghai38@huawei.com
drivers/net/wireless/marvell/libertas_tf/if_usb.c
patch
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blob
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diff --git
a/drivers/net/wireless/marvell/libertas_tf/if_usb.c
b/drivers/net/wireless/marvell/libertas_tf/if_usb.c
index
fe0a69e
..
75b5319
100644
(file)
--- a/
drivers/net/wireless/marvell/libertas_tf/if_usb.c
+++ b/
drivers/net/wireless/marvell/libertas_tf/if_usb.c
@@
-230,6
+230,7
@@
static int if_usb_probe(struct usb_interface *intf,
dealloc:
if_usb_free(cardp);
+ kfree(cardp);
error:
lbtf_deb_leave(LBTF_DEB_MAIN);
return -ENOMEM;
@@
-254,6
+255,7
@@
static void if_usb_disconnect(struct usb_interface *intf)
/* Unlink and free urb */
if_usb_free(cardp);
+ kfree(cardp);
usb_set_intfdata(intf, NULL);
usb_put_dev(interface_to_usbdev(intf));