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Message-Id: <20221013002124.1894077-29-sashal@kernel.org>
Date: Wed, 12 Oct 2022 20:21:04 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Jianglei Nie <niejianglei2021@....com>,
Mathias Nyman <mathias.nyman@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Sasha Levin <sashal@...nel.org>, mathias.nyman@...el.com,
linux-usb@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 29/47] usb: host: xhci: Fix potential memory leak in xhci_alloc_stream_info()
From: Jianglei Nie <niejianglei2021@....com>
[ Upstream commit 7e271f42a5cc3768cd2622b929ba66859ae21f97 ]
xhci_alloc_stream_info() allocates stream context array for stream_info
->stream_ctx_array with xhci_alloc_stream_ctx(). When some error occurs,
stream_info->stream_ctx_array is not released, which will lead to a
memory leak.
We can fix it by releasing the stream_info->stream_ctx_array with
xhci_free_stream_ctx() on the error path to avoid the potential memory
leak.
Signed-off-by: Jianglei Nie <niejianglei2021@....com>
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Link: https://lore.kernel.org/r/20220921123450.671459-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/usb/host/xhci-mem.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index b398d3fdabf6..02cd4d7c3e7e 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -642,7 +642,7 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
num_stream_ctxs, &stream_info->ctx_array_dma,
mem_flags);
if (!stream_info->stream_ctx_array)
- goto cleanup_ctx;
+ goto cleanup_ring_array;
memset(stream_info->stream_ctx_array, 0,
sizeof(struct xhci_stream_ctx)*num_stream_ctxs);
@@ -703,6 +703,11 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
}
xhci_free_command(xhci, stream_info->free_streams_command);
cleanup_ctx:
+ xhci_free_stream_ctx(xhci,
+ stream_info->num_stream_ctxs,
+ stream_info->stream_ctx_array,
+ stream_info->ctx_array_dma);
+cleanup_ring_array:
kfree(stream_info->stream_rings);
cleanup_info:
kfree(stream_info);
--
2.35.1
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