Package: iproute2 Version: 5.10.0-4 Severity: normal Dear Maintainer,
I just came across a "stack smashing detected" crash when changing a gre6 to a gre4 tunnel To reproduce create an ipv6 gre tunnel: > ip tunnel add gre1 mode ip6gre local 2001:db8::1 remote 2001:db8::2 ttl 255 And then attempt to change it to an ipv4 one: > ip tunnel change gre1 mode gre local 192.168.0.0 remote 192.168.0.1 ttl 255 This results in: > *** stack smashing detected ***: terminated > Aborted The inverse (changing v4 to v6) results in: > add tunnel "gre1" failed: Invalid argument Which I'm not sure if I should expect or if that's another issue, but it does not crash. I've reproduced the crash on a few other bullseye servers/vms to rule out a single broken install. I have also tested this on testing (iproute2 version 6.1.0-2) and the crash also happens there I hope this is the right place and helpful enough to action on Thanks! -- System Information: Debian Release: 11.6 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-20-amd64 (SMP w/24 CPU threads) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages iproute2 depends on: ii debconf [debconf-2.0] 1.5.77 ii libbpf0 1:0.3-2 ii libbsd0 0.11.3-1 ii libc6 2.31-13+deb11u5 ii libcap2 1:2.44-1 ii libcap2-bin 1:2.44-1 ii libdb5.3 5.3.28+dfsg1-0.8 ii libelf1 0.183-1 ii libmnl0 1.0.4-3 ii libselinux1 3.1-3 ii libxtables12 1.8.7-1 Versions of packages iproute2 recommends: pn libatm1 <none> Versions of packages iproute2 suggests: pn iproute2-doc <none> -- debconf information: iproute2/setcaps: false
