Hello.
Following quite a bit of debugging, I think I've found a wrong check in
memory.c file, at line 2789 (0.3.13+ds-3):
https://sources.debian.org/src/openblas/0.3.13+ds-3/driver/others/memory.c/
IIUC, it should check *func != NULL instead of func != NULL . func
should be "guaranteed" to not be NULL since memoryalloc is defined at
line 2641.
Else, when it reaches the last element of memoryalloc[], func is not
NULL but *func is, and it's what gets dereferenced.
I noticed it because both octave and python-numpy started segfaulting
after a distro upgrade.
In both cases the stack trace contained something like:
#0 0x0000000000000000 in ?? ()
#1 0x00007f9c614de7d9 in ?? () from
/usr/lib/x86_64-linux-gnu/libopenblas.so.0
and valgrind trace:
==746909== Jump to the invalid address stated on the next line
==746909== at 0x0: ???
==746909== by 0xBDFD708: blas_memory_alloc (memory.c:2793)
==746909== by 0xBDFDF03: blas_thread_server (blas_server.c:366)
==746909== by 0x8D33EA6: start_thread (pthread_create.c:477)
==746909== by 0x725EDEE: clone (clone.S:95)
==746909== Address 0x0 is not stack'd, malloc'd or (recently) free'd
Strangely, the segfaults disappeared installing libopenblas0-serial.
Hope it helps.
--
Diego Zuccato
DIFA - Dip. di Fisica e Astronomia
Servizi Informatici
Alma Mater Studiorum - Università di Bologna
V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
tel.: +39 051 20 95786
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