crash of h5dump of H5Lexternal.c in function H5L__extern_query

[NigelX]

Hi
I found an crash error.

System info：
Ubuntu 20.04 : clang 10.0.0 , gcc 9.3.0

hdf5 version 1.13.0 ,git branch development

---

Verification steps：
1.Get the source code of hdf5
2.Compile the hdf5

$ cd hdf5
$ mkdir build && cd build
$ cmake ../ -DCMAKE_C_COMPILER=clang  -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_FLAGS="-fsanitize=address" -DCMAKE_CXX_FLAGS="-fsanitize=address"
$ make -j 32

3.run h5dump

$ cd bin
$ mkdir crashtest_dir
$ ./h5dump -r -d crashtest_dir/data poc

poc.zip

asan info

AddressSanitizer:DEADLYSIGNAL
=================================================================
==1369613==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x000000989dfc bp 0x00000000a109 sp 0x7fff1c6e1340 T0)
==1369613==The signal is caused by a READ memory access.
==1369613==Hint: address points to the zero page.
    #0 0x989dfc in H5L__extern_query /home/hh/Downloads/hdf5/src/H5Lexternal.c:287:11
    #1 0x876042 in H5G_link_to_info /home/hh/Downloads/hdf5/src/H5Glink.c:325:35
    #2 0x871d11 in H5G__visit_cb /home/hh/Downloads/hdf5/src/H5Gint.c:1065:9
    #3 0x87767e in H5G__link_iterate_table /home/hh/Downloads/hdf5/src/H5Glink.c:475:21
    #4 0x11eeb0f in H5G__compact_iterate /home/hh/Downloads/hdf5/src/H5Gcompact.c:407:22
    #5 0x898018 in H5G__obj_iterate /home/hh/Downloads/hdf5/src/H5Gobj.c:661:30
    #6 0x87106f in H5G_visit /home/hh/Downloads/hdf5/src/H5Gint.c:1297:14
    #7 0x103fa3f in H5VL__native_link_specific /home/hh/Downloads/hdf5/src/H5VLnative_link.c:362:38
    #8 0xfe90e3 in H5VL__link_specific /home/hh/Downloads/hdf5/src/H5VLcallback.c:5140:22
    #9 0xfe90e3 in H5VL_link_specific /home/hh/Downloads/hdf5/src/H5VLcallback.c:5176:22
    #10 0x976df8 in H5Lvisit_by_name2 /home/hh/Downloads/hdf5/src/H5L.c:2024:22
    #11 0x558472 in traverse /home/hh/Downloads/hdf5/tools/lib/h5trav.c:288:17
    #12 0x55c606 in h5trav_visit /home/hh/Downloads/hdf5/tools/lib/h5trav.c:1057:9
    #13 0x553c25 in init_objs /home/hh/Downloads/hdf5/tools/lib/h5tools_utils.c:793:22
    #14 0x4c460c in table_list_add /home/hh/Downloads/hdf5/tools/src/h5dump/h5dump.c:476:9
    #15 0x4c75c2 in main /home/hh/Downloads/hdf5/tools/src/h5dump/h5dump.c:1549:13
    #16 0x7fee5ecb70b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
    #17 0x41c60d in _start (/home/hh/Downloads/hdf5/build/bin/h5dump+0x41c60d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/hh/Downloads/hdf5/src/H5Lexternal.c:287:11 in H5L__extern_query
==1369613==ABORTING

Fedora 33

Segmentation fault (core dumped)

Thanks

[byrnHDF]

develop (minor: Address overflowed) is handling this:
HDF5-DIAG: Error detected in HDF5 (1.13.4-1) thread 0:
#000: /HDF_Projects/hdf5/dev/src/H5L.c line 1988 in H5Lvisit_by_name2(): link visitation failed
major: Links
minor: Iteration failed
#1: /HDF_Projects/hdf5/dev/src/H5VLcallback.c line 5517 in H5VL_link_specific(): unable to execute link specific callback
major: Virtual Object Layer
minor: Can't operate on object
#2: /HDF_Projects/hdf5/dev/src/H5VLcallback.c line 5483 in H5VL__link_specific(): unable to execute link specific callback
major: Virtual Object Layer
minor: Can't operate on object
#3: /HDF_Projects/hdf5/dev/src/H5VLnative_link.c line 377 in H5VL__native_link_specific(): link visitation failed
major: Links
minor: Iteration failed
#4: /HDF_Projects/hdf5/dev/src/H5Gint.c line 1244 in H5G_visit(): can't visit links
major: Symbol table
minor: Iteration failed
#5: /HDF_Projects/hdf5/dev/src/H5Gobj.c line 662 in H5G__obj_iterate(): can't iterate over compact links
major: Symbol table
minor: Iteration failed
#6: /HDF_Projects/hdf5/dev/src/H5Gcompact.c line 403 in H5G__compact_iterate(): can't create link message table
major: Symbol table
minor: Unable to initialize object
#7: /HDF_Projects/hdf5/dev/src/H5Gcompact.c line 151 in H5G__compact_build_table(): error iterating over link messages
major: Symbol table
minor: Object not found
#8: /HDF_Projects/hdf5/dev/src/H5Omessage.c line 1174 in H5O_msg_iterate(): unable to iterate over object header messages
major: Object header
minor: Iteration failed
#9: /HDF_Projects/hdf5/dev/src/H5Omessage.c line 1236 in H5O__msg_iterate_real(): unable to decode message
major: Object header
minor: Unable to decode value
#10: /HDF_Projects/hdf5/dev/src/H5Olink.c line 243 in H5O__link_decode(): external link information length < 3
major: Object header
minor: Address overflowed
h5dump error: internal error (file /HDF_Projects/hdf5/dev/tools/src/h5dump/h5dump.c:line 1525)
H5tools-DIAG: Error detected in HDF5:tools (1.13.4) thread 0:
#000:/HDF_Projects/hdf5/dev/tools/lib/h5tools_utils.c line 629 in init_objs(): finding shared objects failed
major: Failure in tools library
minor: error in function
#1: /HDF_Projects/hdf5/dev/tools/lib/h5trav.c line 1052 in h5trav_visit(): traverse failed
major: Failure in tools library
minor: error in function
#2: /HDF_Projects/hdf5/dev/tools/lib/h5trav.c line 284 in traverse(): H5Lvisit_by_name failed
major: Failure in tools library
minor: error in function

[byrnHDF]

No crash as error is handled in current develop