[PATCH v6 00/18] lib: fix format overflows

Stephen Hemminger
2025-12-23T18:14:26Z

Change all the libraries to find and fix cases where a string
could overflow when formatting or using strclpy. This does provide
early indication of possible problems where the file prefix is too
long to fit in unix domain socket path, and where a hash table
is being requested that has a name too long.

v6 - rebase and add length checks to cfgfile

Stephen Hemminger (18):
lpm: restrict name size
hash: add checks for hash name length
graph: avoid overflowing comment buffer
latencystats: add check for string overflow
telemetry: avoid possible string overflow
efd: handle possible name truncation
eal: use C library to parse filesystem table
eal: warn if thread name is truncated
eal: avoid format overflow when handling addresses
eal: add check for sysfs path overflow
eal: limit maximum runtime directory and socket paths
eal: check for hugefile path overflow
eal: check tailq length
eal: handle long shared library path
ethdev: avoid possible overflow in xstat names
vhost: check for overflow in xstat name
cfgfile: add length checks and increase line buffer
lib: enable format overflow warnings

app/test/test_hash.c | 21 ++++++
doc/guides/rel_notes/release_26_03.rst | 3 +
lib/cfgfile/rte_cfgfile.c | 36 +++++++---
lib/eal/common/eal_common_config.c | 6 +-
lib/eal/common/eal_common_memory.c | 2 +-
lib/eal/common/eal_common_options.c | 17 +++--
lib/eal/common/eal_common_proc.c | 83 ++++++++++++++--------
lib/eal/common/eal_common_tailqs.c | 5 ++
lib/eal/common/eal_filesystem.h | 23 ++++--
lib/eal/freebsd/eal.c | 6 +-
lib/eal/linux/eal.c | 6 +-
lib/eal/linux/eal_hugepage_info.c | 98 ++++++++++++--------------
lib/eal/linux/eal_memalloc.c | 11 ++-
lib/eal/linux/eal_memory.c | 9 ++-
lib/eal/windows/eal.c | 6 +-
lib/efd/rte_efd.c | 7 +-
lib/ethdev/rte_ethdev.c | 35 ++++++---
lib/graph/graph_pcap.c | 9 ++-
lib/hash/rte_cuckoo_hash.c | 41 +++++++----
lib/hash/rte_fbk_hash.c | 14 +++-
lib/latencystats/rte_latencystats.c | 9 ++-
lib/lpm/rte_lpm.c | 25 +++++--
lib/lpm/rte_lpm.h | 2 +-
lib/meson.build | 4 --
lib/telemetry/telemetry_legacy.c | 37 ++++++----
lib/vhost/vhost.c | 14 ++--
26 files changed, 352 insertions(+), 177 deletions(-)

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2.51.0