* [PATCH][next] ath10k: fix null dereference on pointer crash_data
@ 2019-10-04 16:02 Colin King
2019-10-11 8:46 ` Kalle Valo
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2019-10-04 16:02 UTC (permalink / raw)
To: Kalle Valo, David S . Miller, ath10k, linux-wireless, netdev
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Currently when pointer crash_data is null the present null check
will also check that crash_data->ramdump_buf is null and will cause
a null pointer dereference on crash_data. Fix this by using the ||
operator instead of &&.
Fixes: 3f14b73c3843 ("ath10k: Enable MSA region dump support for WCN3990")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/wireless/ath/ath10k/snoc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index cd22c8654aa9..16177497bba7 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -1400,7 +1400,7 @@ static void ath10k_msa_dump_memory(struct ath10k *ar,
size_t buf_len;
u8 *buf;
- if (!crash_data && !crash_data->ramdump_buf)
+ if (!crash_data || !crash_data->ramdump_buf)
return;
mem_layout = ath10k_coredump_get_mem_layout(ar);
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] ath10k: fix null dereference on pointer crash_data
2019-10-04 16:02 [PATCH][next] ath10k: fix null dereference on pointer crash_data Colin King
@ 2019-10-11 8:46 ` Kalle Valo
0 siblings, 0 replies; 2+ messages in thread
From: Kalle Valo @ 2019-10-11 8:46 UTC (permalink / raw)
To: Colin King
Cc: David S . Miller, ath10k, linux-wireless, netdev,
kernel-janitors, linux-kernel
Colin King <colin.king@canonical.com> wrote:
> Currently when pointer crash_data is null the present null check
> will also check that crash_data->ramdump_buf is null and will cause
> a null pointer dereference on crash_data. Fix this by using the ||
> operator instead of &&.
>
> Fixes: 3f14b73c3843 ("ath10k: Enable MSA region dump support for WCN3990")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Patch applied to ath-next branch of ath.git, thanks.
a69d3bdd4d40 ath10k: fix null dereference on pointer crash_data
--
https://patchwork.kernel.org/patch/11174955/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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