From 6e21ecc70a8ae9dd007dfa5aa7206995d380ce05 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 7 Jan 2025 17:26:43 +0100
Subject: [PATCH] LIBERTIFF: do not crash on corrupted LZW compressed file

---
 autotest/gcore/data/gtiff/lzw_corrupted.tif | Bin 0 -> 163 bytes
 autotest/gcore/libertiff.py                 |   7 +++++++
 autotest/gcore/tiff_read.py                 |   7 +++++++
 frmts/libertiff/libertiffdataset.cpp        |   2 ++
 4 files changed, 16 insertions(+)
 create mode 100644 autotest/gcore/data/gtiff/lzw_corrupted.tif

diff --git a/autotest/gcore/data/gtiff/lzw_corrupted.tif b/autotest/gcore/data/gtiff/lzw_corrupted.tif
new file mode 100644
index 0000000000000000000000000000000000000000..444fc94f51227d9d093c1c54c54f6d0d8d7f9841
GIT binary patch
literal 163
zcmebD)MDUZU|`^3U|?isU<9(5fS3`=2J@k8kSb;<n-$1rLsBEi$O6_o4=65*Brb-;
b7Kf?<>6Jkew?$$HBe8+X7#gJh|NjpF5Mc&t

literal 0
HcmV?d00001

diff --git a/autotest/gcore/libertiff.py b/autotest/gcore/libertiff.py
index 6d8b535dfcd0..0efbf2b97358 100755
--- a/autotest/gcore/libertiff.py
+++ b/autotest/gcore/libertiff.py
@@ -859,3 +859,10 @@ def test_libertiff_read_geomatrix():
 def test_libertiff_num_threads_saturated():
 
     libertiff_open("data/byte.tif", open_options=["NUM_THREADS=10000"])
+
+
+def test_libertiff_corrupted_lzw():
+
+    ds = libertiff_open("data/gtiff/lzw_corrupted.tif")
+    with pytest.raises(Exception):
+        ds.ReadRaster()
diff --git a/autotest/gcore/tiff_read.py b/autotest/gcore/tiff_read.py
index 500d05398930..763c75c1af8c 100755
--- a/autotest/gcore/tiff_read.py
+++ b/autotest/gcore/tiff_read.py
@@ -5575,3 +5575,10 @@ def test_tiff_read_corrupted_vat_dbf(tmp_vsimem):
         band = ds.GetRasterBand(1)
         with pytest.raises(Exception):
             band.GetDefaultRAT()
+
+
+def test_tiff_read_corrupted_lzw():
+
+    ds = gdal.Open("data/gtiff/lzw_corrupted.tif")
+    with pytest.raises(Exception):
+        ds.ReadRaster()
diff --git a/frmts/libertiff/libertiffdataset.cpp b/frmts/libertiff/libertiffdataset.cpp
index 5b496081fac8..6e88b572423b 100644
--- a/frmts/libertiff/libertiffdataset.cpp
+++ b/frmts/libertiff/libertiffdataset.cpp
@@ -1403,6 +1403,8 @@ bool LIBERTIFFDataset::ReadBlock(GByte *pabyBlockData, int nBlockXOff,
 
                 if (tlsState.m_tiff.tif_decodestrip)
                 {
+                    tlsState.m_tiff.tif_name =
+                        const_cast<char *>(GetDescription());
                     tlsState.m_tiff.tif_dir.td_sampleformat =
                         static_cast<uint16_t>(m_image->sampleFormat());
                     tlsState.m_tiff.tif_dir.td_bitspersample =