6.15-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit 8c7a5031a6b0d42e640fbd2d5d05f61f74e32dce ]
If the user tries to write more than 32 bytes then it results in memory corruption. Fortunately, this is debugfs so it's limited to root users.
Fixes: 3f73c24f28b3 ("wifi: ath12k: Add support to enable debugfs_htt_stats") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Reviewed-by: Vasanthakumar Thiagarajan vasanthakumar.thiagarajan@oss.qualcomm.com Link: https://patch.msgid.link/35daefbd-d493-41d9-b192-96177d521b40@stanley.mounta... Signed-off-by: Jeff Johnson jeff.johnson@oss.qualcomm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c b/drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c index 1c0d5fa39a8dc..aeaf970339d4d 100644 --- a/drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c +++ b/drivers/net/wireless/ath/ath12k/debugfs_htt_stats.c @@ -5377,6 +5377,9 @@ static ssize_t ath12k_write_htt_stats_type(struct file *file, const int size = 32; int num_args;
+ if (count > size) + return -EINVAL; + char *buf __free(kfree) = kzalloc(size, GFP_KERNEL); if (!buf) return -ENOMEM;