33 lines
1.2 KiB
Diff
33 lines
1.2 KiB
Diff
From d2af9b566554e01f9ad67b330ce569dbc130e5d3 Mon Sep 17 00:00:00 2001
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From: Franky Lin <franky.lin@broadcom.com>
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Date: Wed, 16 May 2018 14:12:01 +0200
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Subject: [PATCH] brcmfmac: validate user provided data for memdump before
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copying
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In patch "brcmfmac: add support for sysfs initiated coredump", a new
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scenario of brcmf_debug_create_memdump was added in which the user of
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the function might not necessarily provide prefix data. Hence the
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function should not assume the data is always valid and should perform a
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check before copying.
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Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Franky Lin <franky.lin@broadcom.com>
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Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
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@@ -42,7 +42,8 @@ int brcmf_debug_create_memdump(struct br
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if (!dump)
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return -ENOMEM;
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- memcpy(dump, data, len);
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+ if (data && len > 0)
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+ memcpy(dump, data, len);
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err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
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if (err) {
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vfree(dump);
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