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Update babeltrace2 (2.0.5 and fix live) #23

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Oct 13, 2023
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Original file line number Diff line number Diff line change
@@ -0,0 +1,79 @@
From 795a60c9c7a228da03c2e9977d01d4b6f22e933a Mon Sep 17 00:00:00 2001
From: Simon Marchi <[email protected]>
Date: Fri, 22 Sep 2023 15:36:20 -0400
Subject: [PATCH] ctf: grow stored_values array when necessary
The CTF message iterator accesses the `stored_values` array out of
bounds in the following situation:
- In the context of a src.ctf.lttng-live source, a ctf_trace_class gets
created from some metadata.
- At this point, ctf_trace_class->stored_value_count indicates that a
certain number of stored values are necessary given the metadata
parsed up to now.
- The message iterators are created with `stored_values` arrays of that
size.
- The source receives more metadata, which requires more stored
values.
- The message iterator reads some event described by the new metadata,
that requires the use of a stored value.
- Since the stored value arrays have not been resized to reflect the
necessary number of stored value considering the new metadata, the
message iterator tries to store a value past the end of the array.
Fix this by ensuring the `stored_values` array is large enough before
storing a value in it.
Change-Id: I78e3ca57ac6cae1959425df3c8ffdbfeb534f348
Signed-off-by: Simon Marchi <[email protected]>
---
src/plugins/ctf/common/msg-iter/msg-iter.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/plugins/ctf/common/msg-iter/msg-iter.c b/src/plugins/ctf/common/msg-iter/msg-iter.c
index a49462b85977..24924f2b69b6 100644
--- a/src/plugins/ctf/common/msg-iter/msg-iter.c
+++ b/src/plugins/ctf/common/msg-iter/msg-iter.c
@@ -1933,6 +1933,22 @@ end:
"value=%" PRIu64, msg_it->default_clock_snapshot);
}

+/*
+ * Ensure the message iterator's `stored_values` array is large enough to
+ * accomodate `storing_index`.
+ *
+ * We may need more slots in the array than initially allocated if more
+ * metadata arrives along the way.
+ */
+static
+void ensure_stored_values_size(struct ctf_msg_iter *msg_it,
+ uint64_t storing_index)
+{
+ if (G_UNLIKELY(storing_index >= msg_it->stored_values->len)) {
+ g_array_set_size(msg_it->stored_values, msg_it->meta.tc->stored_value_count);
+ }
+}
+
static
enum bt_bfcr_status bfcr_unsigned_int_cb(uint64_t value,
struct ctf_field_class *fc, void *data)
@@ -2001,6 +2017,7 @@ update_def_clock:
}

if (G_UNLIKELY(int_fc->storing_index >= 0)) {
+ ensure_stored_values_size(msg_it, int_fc->storing_index);
g_array_index(msg_it->stored_values, uint64_t,
(uint64_t) int_fc->storing_index) = value;
}
@@ -2090,6 +2107,7 @@ enum bt_bfcr_status bfcr_signed_int_cb(int64_t value,
BT_ASSERT_DBG(int_fc->meaning == CTF_FIELD_CLASS_MEANING_NONE);

if (G_UNLIKELY(int_fc->storing_index >= 0)) {
+ ensure_stored_values_size(msg_it, int_fc->storing_index);
g_array_index(msg_it->stored_values, uint64_t,
(uint64_t) int_fc->storing_index) = (uint64_t) value;
}
base-commit: 75daa1081c5cfee4197203dc826f30f58174fbac
--
2.42.0
4 changes: 3 additions & 1 deletion packages/babeltrace2/package.py
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ class Babeltrace2(AutotoolsPackage):

maintainers = ['Kerilk']

version('2.0.5', sha256='7b8f9ef2a7ee7c9ec292d4568811cf6926089b25e49cdaab449e2cb724edf2b4')
version('2.0.4', sha256='774f116685dab5db9c51577dde43c8c1df482aae6bb78a089b1e9e7c8b489bca')
version('2.0.3', sha256='a53625152554102d868ba8395347d0daba0bec9c4b854c3e9bd97c77b0bf04a0')
version('2.0.2', sha256='30c684e8b948fb79b12ee6861957dc3b99f2aba33a11cfb7fbe598e8a4aae24a')
Expand Down Expand Up @@ -42,8 +43,9 @@ class Babeltrace2(AutotoolsPackage):
depends_on('pkg-config')

patch('d2d2e6cc.patch')
patch('0db1832.patch')
patch('0db1832.patch', when='@:2.0.4')
patch('3079913.patch')
patch('0001-ctf-grow-stored_values-array-when-necessary.patch', when='@:2.0.5')

def configure_args(self):
args = []
Expand Down