Patch 1 fixes a possible deadlock in subflow_error_report() reported by lockdep. The report was in fact a false positive but the modification makes sense and silences lockdep to allow syzkaller to find real issues. The regression has been introduced in v5.12. Patch 2 is a refactoring needed to be able to fix the two next issues. It improves the situation and can be backported up to v6.0. Patches 3 and 4 fix UaF reported by KASAN. It fixes issues potentially visible since v5.7 and v5.19 but only reproducible until recently (v6.0). These two patches depend on patch 2/7. Patch 5 fixes the order of the printed values: expected vs seen values. The regression has been introduced recently: v6.3-rc1. Patch 6 adds missing ro_after_init flags. A previous patch added them for other functions but these two have been missed. This previous patch has been backported to stable versions (up to v5.12) so probably better to do the same here. Patch 7 fixes tcp_set_state() being called twice in a row since v5.10. Patch 8 fixes another lockdep false positive issue but this time in MPTCP PM code. Same here, some modifications in the code has been made to silence this issue and help finding real ones later. This issue can be seen since v6.2. Note that checkpatch.pl is now complaining about the "Closes" tag but discussions are ongoing to add an exception: https://lore.kernel.org/all/a27480c5-c3d4-b302-285e-323df0349b8f@xxxxxxxxxxxx/ Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx> --- Changes in v2: - Patches 3 and 4 have been modified to fix the issue reported on netdev - Patch 8 has been added - Rebased - Link to v1: https://lore.kernel.org/r/20230227-upstream-net-20230227-mptcp-fixes-v1-0-070e30ae4a8e@xxxxxxxxxxxx --- Geliang Tang (1): mptcp: add ro_after_init for tcp{,v6}_prot_override Matthieu Baerts (2): selftests: mptcp: userspace pm: fix printed values mptcp: avoid setting TCP_CLOSE state twice Paolo Abeni (5): mptcp: fix possible deadlock in subflow_error_report mptcp: refactor passive socket initialization mptcp: use the workqueue to destroy unaccepted sockets mptcp: fix UaF in listener shutdown mptcp: fix lockdep false positive in mptcp_pm_nl_create_listen_socket() net/mptcp/pm_netlink.c | 16 +++ net/mptcp/protocol.c | 64 +++++------ net/mptcp/protocol.h | 6 +- net/mptcp/subflow.c | 128 +++++++--------------- tools/testing/selftests/net/mptcp/userspace_pm.sh | 2 +- 5 files changed, 95 insertions(+), 121 deletions(-) --- base-commit: 67eeadf2f95326f6344adacb70c880bf2ccff57b change-id: 20230227-upstream-net-20230227-mptcp-fixes-cc78f3a2f5b2 Best regards, -- Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
