diff options
| author | Carl Huang <cjhuang@codeaurora.org> | 2018-03-05 14:44:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-13 09:11:33 +0200 |
| commit | 023fdb64ee8d171f691a97bffa1d168bef750c7f (patch) | |
| tree | 24f8c82e6e20eea4e4b0850f5ca0259eb595cc0b /drivers/net/wireless/ath | |
| parent | 75fe5488b22f10844334c0960b12b2cf5c606028 (diff) | |
ath10k: fix use-after-free in ath10k_wmi_cmd_send_nowait
commit 9ef0f58ed7b4a55da4a64641d538e0d9e46579ac upstream.
The skb may be freed in tx completion context before
trace_ath10k_wmi_cmd is called. This can be easily captured when
KASAN(Kernel Address Sanitizer) is enabled. The fix is to move
trace_ath10k_wmi_cmd before the send operation. As the ret has no
meaning in trace_ath10k_wmi_cmd then, so remove this parameter too.
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/trace.h | 12 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/wmi.c | 2 |
2 files changed, 5 insertions, 9 deletions
diff --git a/drivers/net/wireless/ath/ath10k/trace.h b/drivers/net/wireless/ath/ath10k/trace.h index 71bdb368813d..0194bebbdbf7 100644 --- a/drivers/net/wireless/ath/ath10k/trace.h +++ b/drivers/net/wireless/ath/ath10k/trace.h @@ -152,10 +152,9 @@ TRACE_EVENT(ath10k_log_dbg_dump, ); TRACE_EVENT(ath10k_wmi_cmd, - TP_PROTO(struct ath10k *ar, int id, const void *buf, size_t buf_len, - int ret), + TP_PROTO(struct ath10k *ar, int id, const void *buf, size_t buf_len), - TP_ARGS(ar, id, buf, buf_len, ret), + TP_ARGS(ar, id, buf, buf_len), TP_STRUCT__entry( __string(device, dev_name(ar->dev)) @@ -163,7 +162,6 @@ TRACE_EVENT(ath10k_wmi_cmd, __field(unsigned int, id) __field(size_t, buf_len) __dynamic_array(u8, buf, buf_len) - __field(int, ret) ), TP_fast_assign( @@ -171,17 +169,15 @@ TRACE_EVENT(ath10k_wmi_cmd, __assign_str(driver, dev_driver_string(ar->dev)); __entry->id = id; __entry->buf_len = buf_len; - __entry->ret = ret; memcpy(__get_dynamic_array(buf), buf, buf_len); ), TP_printk( - "%s %s id %d len %zu ret %d", + "%s %s id %d len %zu", __get_str(driver), __get_str(device), __entry->id, - __entry->buf_len, - __entry->ret + __entry->buf_len ) ); diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 7569db0f69b5..5bb1be478954 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -1642,8 +1642,8 @@ int ath10k_wmi_cmd_send_nowait(struct ath10k *ar, struct sk_buff *skb, cmd_hdr->cmd_id = __cpu_to_le32(cmd); memset(skb_cb, 0, sizeof(*skb_cb)); + trace_ath10k_wmi_cmd(ar, cmd_id, skb->data, skb->len); ret = ath10k_htc_send(&ar->htc, ar->wmi.eid, skb); - trace_ath10k_wmi_cmd(ar, cmd_id, skb->data, skb->len, ret); if (ret) goto err_pull; |