From upstream commit: https://github.com/falcosecurity/libs/commit/a273f3d05c6e90ffc5d47a919a92b3e4d887b340 From: =?UTF-8?q?Holger=20Hoffst=C3=A4tte?= Date: Sun, 3 Aug 2025 16:57:14 +0200 Subject: [PATCH] fix(libsinsp): use proper INET6_ADDRSTRLEN buffer size for inet_ntop glibc-2.42 added __inet_ntop_chk fortification, which started to fail: *** buffer overflow detected ***: terminated Program received signal SIGABRT, Aborted. 0x00007ffff629b0dc in __pthread_kill_implementation () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff629b0dc in __pthread_kill_implementation () from /lib64/libc.so.6 #1 0x00007ffff6242572 in raise () from /lib64/libc.so.6 #2 0x00007ffff6229f3b in abort () from /lib64/libc.so.6 #3 0x00007ffff622b148 in __libc_message_impl.cold () from /lib64/libc.so.6 #4 0x00007ffff6327337 in __fortify_fail () from /lib64/libc.so.6 #5 0x00007ffff6326c92 in __chk_fail () from /lib64/libc.so.6 #6 0x00007ffff6327a62 in __inet_ntop_chk () from /lib64/libc.so.6 #7 0x000055555569da3d in inet_ntop (__af=10, __src=0x555555ee0800, __dst=0x7fffffff4f90 "\260P\377\377\377\177", __dst_size=100) at /usr/include/bits/inet-fortified.h:36 #8 ipv6tuple_to_string[abi:cxx11](ipv6tuple*, bool) (tuple=0x555555ee0800, resolve=false) at /tmp/portage/dev-debug/sysdig-0.40.1/work/libs-0.20.0/userspace/libsinsp/utils.c Use INET6_ADDRSTRLEN as destination buffer size. Fixes: https://github.com/falcosecurity/libs/issues/2573 Signed-off-by: Holger Hoffstätte --- userspace/libsinsp/utils.cpp | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/userspace/libsinsp/utils.cpp b/userspace/libsinsp/utils.cpp index 06b921cbbf..b676b8dd34 100644 --- a/userspace/libsinsp/utils.cpp +++ b/userspace/libsinsp/utils.cpp @@ -1042,8 +1042,8 @@ std::string ipv4tuple_to_string(const ipv4tuple& tuple, const bool resolve) { } std::string ipv6serveraddr_to_string(const ipv6serverinfo& addr, const bool resolve) { - char address[100]; - if(!inet_ntop(AF_INET6, addr.m_ip.m_b, address, 100)) { + char address[INET6_ADDRSTRLEN]; + if(!inet_ntop(AF_INET6, addr.m_ip.m_b, address, INET6_ADDRSTRLEN)) { return std::string(); } @@ -1058,12 +1058,12 @@ std::string ipv6serveraddr_to_string(const ipv6serverinfo& addr, const bool reso std::string ipv6tuple_to_string(const ipv6tuple& tuple, const bool resolve) { char source_address[INET6_ADDRSTRLEN]; - if(!inet_ntop(AF_INET6, tuple.m_fields.m_sip.m_b, source_address, 100)) { + if(!inet_ntop(AF_INET6, tuple.m_fields.m_sip.m_b, source_address, INET6_ADDRSTRLEN)) { return std::string(); } char destination_address[INET6_ADDRSTRLEN]; - if(!inet_ntop(AF_INET6, tuple.m_fields.m_dip.m_b, destination_address, 100)) { + if(!inet_ntop(AF_INET6, tuple.m_fields.m_dip.m_b, destination_address, INET6_ADDRSTRLEN)) { return std::string(); }