From: Martin Pitt 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 --- Martin, I took the liberty to add a newline around the lines you're adding so that we need a single comment and everything is aligned. I also changed the format of commit references to what we typically use, which is inspired by the preferred format for kernel submissions, I used this one-liner: git show -s --abbrev=12 --pretty=format:"Fixes: %h (\"%s\")" "${SHA}" which actually belongs to CONTRIBUTING.md, cf. page 1241 of my to-do book. 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 -- 2.43.0