From: Inga Stotland <inga.stotland@intel.com>
To: linux-bluetooth@vger.kernel.org
Cc: brian.gix@intel.com, Inga Stotland <inga.stotland@intel.com>
Subject: [PATCH BlueZ] mesh: Fix double free of a pointer in mesh-io-generic
Date: Wed, 7 Aug 2019 13:06:36 -0700 [thread overview]
Message-ID: <20190807200636.19614-1-inga.stotland@intel.com> (raw)
This fixes a crash in bluetooth-meshd due to freeing the same pointer
twice. The fix is to initialize the address of freed TX buffer to NULL.
---
mesh/mesh-io-generic.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/mesh/mesh-io-generic.c b/mesh/mesh-io-generic.c
index 576c5df1b..cc91f494e 100644
--- a/mesh/mesh-io-generic.c
+++ b/mesh/mesh-io-generic.c
@@ -654,8 +654,12 @@ static bool tx_cancel(struct mesh_io *io, const uint8_t *data, uint8_t len)
tx = l_queue_remove_if(pvt->tx_pkts, find_by_ad_type,
L_UINT_TO_PTR(data[0]));
l_free(tx);
+
+ if (tx == pvt->tx)
+ pvt->tx = NULL;
+
} while (tx);
- } else {
+ } else {
struct tx_pattern pattern = {
.data = data,
.len = len
@@ -665,6 +669,10 @@ static bool tx_cancel(struct mesh_io *io, const uint8_t *data, uint8_t len)
tx = l_queue_remove_if(pvt->tx_pkts, find_by_pattern,
&pattern);
l_free(tx);
+
+ if (tx == pvt->tx)
+ pvt->tx = NULL;
+
} while (tx);
}
--
2.21.0
next reply other threads:[~2019-08-07 20:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-07 20:06 Inga Stotland [this message]
2019-08-08 18:57 ` [PATCH BlueZ] mesh: Fix double free of a pointer in mesh-io-generic Gix, Brian
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