From: Wang Hai wanghai38@huawei.com
stable inclusion from stable-5.10.80 commit 975c15a19bbc9c1511c4004109fe30721cf8c8ec bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit d549107305b4634c81223a853701c06bcf657bc3 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/net/wireless/marvell/libertas_tf/if_usb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/marvell/libertas_tf/if_usb.c b/drivers/net/wireless/marvell/libertas_tf/if_usb.c index a92916dc81a9..ecce8b56f8a2 100644 --- 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));