From 2aa63237109b97a55c85e4c86c72db0d055bfe7a Mon Sep 17 00:00:00 2001 From: Martin Pitt Date: Fri, 2 Jan 2026 21:02:12 +0100 Subject: apparmor: Allow reading TCP RTO sysctl parameters Since commits 3dde0e07804e ("tcp: Update data retransmission timeout") and 1a834879a2f7 ("tcp: Clamp the retry timeout") from 2025-12-02, passt reads additional TCP-related sysctl parameters from /proc to configure retransmission timeout behavior: - /proc/sys/net/ipv4/tcp_syn_retries - /proc/sys/net/ipv4/tcp_syn_linear_timeouts - /proc/sys/net/ipv4/tcp_rto_max_ms These are read by tcp_get_rto_params() during initialization. Adjust the AppArmor profile accordingly. Link: https://bugzilla.redhat.com/show_bug.cgi?id=2426863 Link: https://github.com/cockpit-project/bots/pull/8568 Fixes: 3dde0e07804e ("tcp: Update data retransmission timeout") Fixes: 1a834879a2f7 ("tcp: Clamp the retry timeout") Signed-off-by: Martin Pitt [sbrivio: Minor formatting change, changed commit references] Signed-off-by: Stefano Brivio --- contrib/apparmor/abstractions/passt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/contrib/apparmor/abstractions/passt b/contrib/apparmor/abstractions/passt index 43fd63f..25b2ea8 100644 --- a/contrib/apparmor/abstractions/passt +++ b/contrib/apparmor/abstractions/passt @@ -36,6 +36,10 @@ @{PROC}/sys/net/ipv4/ip_local_port_range r, # fwd_probe_ephemeral() + @{PROC}/sys/net/ipv4/tcp_syn_retries r, # tcp_get_rto_params(), tcp.c + @{PROC}/sys/net/ipv4/tcp_syn_linear_timeouts r, + @{PROC}/sys/net/ipv4/tcp_rto_max_ms r, + network netlink raw, # nl_sock_init_do(), netlink.c network inet stream, # tcp.c -- cgit v1.2.3