From 034dd340b08be1f2f0477ad16131d609f9dbd53c Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 30 Aug 2026 09:22:00 -0700 Subject: Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix error output of boot instance creation failure Currently if a boot instance creation fails, instead of printing out the name of the instance that failed, it prints "(null)". That is because it prints "cur_str" that had already been processed by strsep(). Print the saved name instead. While at it, print the error code of the failure. - Fix use-after-free for same named historgrams Histograms can be named so that they can be used in multiple events. But if the named histogram has a variable attached, the second event that uses the named histogram which duplicates it and needs to free the original after duplication leaves the old variable in place and still visible. If another histogram uses than variable, it will use the stale one which will try to reference the freed duplicate histogram and crash the kernel. Free the duplicate variables along with the duplicated histogram data. - Check return value of kthread_run() in event self test The events self tests uses a kthread for testing but does not check if it succeeded in creating a kthread. If the kthread creation were to fail, the code will still try to call kthread_stop() on the error returned. - Fix race between reading trace_pipe and updating subbuffer size If a user is reading the trace_pipe file at the same time they update the ring buffer sub-buffer size, can cause the trace_pipe read to read stale data. Add trace_access_lock() around updating the ring buffer sub-buffer size. - Fix eventfs_inode on failure path in creation of the events directory In the creation of the "events" directory, if after allocating the eventfs_inode a failure is detected, it calls cleanup_ei() which calls free_ei(). The free_ei() will test if eventfs_inode being freed has no children. It is a bug if it does. But on the failure case of the creation of the "events" directory, the children lists have not yet been initialized and the free will trigger a warning because list_empty() on an uninitialized list returns false. Move the initialization into init_ei() where it makes more sense and makes sure that a created eventfs_inode has its lists initialized upon creation. - Check return value of kthread_run() in ftrace direct sample code The sample code that shows how to use the ftrace direct calls does not test the return of kthread_run() to see if it succeeds. Return a failure if the kthread_run() doesn't succeed. - Clear user events state on fork in case of alloc failure On fork, the child gets a pointer to the parent's user events state. It makes a copy of it then updates the child's pointer to it. But if the allocation fails, the duplication function leaves the child with a pointer to its parent's descriptor. When the child cleans up its data, it will free the parent's descriptor while the parent is still using it. In the duplication function, set the child's user_event_mm to NULL before testing if the allocation succeeded, and when it exits it will not free the parent's descriptor. - Fix retry exhaustion in simple ring buffer reader swap simple_ring_buffer_swap_reader_page() starts with retry set to 8 and post-decrements it only after a failed link replacement. On the final attempt, a successful replacement leaves retry at zero, while a failed replacement leaves it at -1. But the check for success expects the retry value to be non-zero and exits with an error on zero. This is the opposite result. Fix it. - Fail nicely when the remote swap_reader_page() returns an error Currently, if the swap_reader_page() of a remote buffer fails, it triggers a WARN_ON_ONCE() and continues normally. Instead, have it exit with an error and a pr_warn() print instead of a full WARNING. * tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: ring-buffer: Stop remote reader update when page swap fails tracing: Fix retry exhaustion in simple ring buffer reader swap tracing/user_events: Clear copied tracing state before fork duplication samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify eventfs: Initialize ei->children and ei->list in init_ei() tracing: Fix use-after-free in trace_pipe read on sub-buffer order change tracing: Fix crash passing ERR_PTR to kthread_stop() tracing: Fix use-after-free with same-name named triggers tracing: Fix logged instance name on creation failure --- include/net/netns/ipv4.h | 304 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 include/net/netns/ipv4.h (limited to 'include/net/netns/ipv4.h') diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h new file mode 100644 index 000000000..cb7f8bf15 --- /dev/null +++ b/include/net/netns/ipv4.h @@ -0,0 +1,304 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * ipv4 in net namespaces + */ + +#ifndef __NETNS_IPV4_H__ +#define __NETNS_IPV4_H__ + +#include +#include +#include +#include +#include + +struct ctl_table_header; +struct ipv4_devconf; +struct fib_rules_ops; +struct hlist_head; +struct fib_table; +struct sock; +struct local_ports { + u32 range; /* high << 16 | low */ + bool warned; +}; + +struct ping_group_range { + seqlock_t lock; + kgid_t range[2]; +}; + +struct inet_hashinfo; + +struct inet_timewait_death_row { + refcount_t tw_refcount; + + /* Padding to avoid false sharing, tw_refcount can be often written */ + struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp; + int sysctl_max_tw_buckets; +}; + +struct tcp_fastopen_context; + +#ifdef CONFIG_IP_ROUTE_MULTIPATH +struct sysctl_fib_multipath_hash_seed { + u32 user_seed; + u32 mp_seed; +}; +#endif + +struct udp_tunnel_gro { + struct sock __rcu *sk; + struct hlist_head list; +}; + +struct netns_ipv4 { + /* Cacheline organization can be found documented in + * Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst. + * Please update the document when adding new fields. + */ + + /* TX readonly hotpath cache lines */ + __cacheline_group_begin(netns_ipv4_read_tx); + u8 sysctl_tcp_early_retrans; + u8 sysctl_tcp_tso_win_divisor; + u8 sysctl_tcp_tso_rtt_log; + u8 sysctl_tcp_autocorking; + int sysctl_tcp_min_snd_mss; + unsigned int sysctl_tcp_notsent_lowat; + int sysctl_tcp_limit_output_bytes; + int sysctl_tcp_min_rtt_wlen; + int sysctl_tcp_wmem[3]; + u8 sysctl_ip_fwd_use_pmtu; + __cacheline_group_end(netns_ipv4_read_tx); + + /* TXRX readonly hotpath cache lines */ + __cacheline_group_begin(netns_ipv4_read_txrx); + u8 sysctl_tcp_shrink_window; + __cacheline_group_end(netns_ipv4_read_txrx); + + /* RX readonly hotpath cache line */ + __cacheline_group_begin(netns_ipv4_read_rx); + u8 sysctl_tcp_moderate_rcvbuf; + u8 sysctl_ip_early_demux; + u8 sysctl_tcp_early_demux; + u8 sysctl_tcp_l3mdev_accept; + /* 3 bytes hole, try to pack */ + int sysctl_tcp_reordering; + int sysctl_tcp_rmem[3]; + int sysctl_tcp_rcvbuf_low_rtt; + __cacheline_group_end(netns_ipv4_read_rx); + + /* ICMP rate limiter hot cache line. */ + __cacheline_group_begin_aligned(icmp); + atomic_t icmp_global_credit; + u32 icmp_global_stamp; + __cacheline_group_end_aligned(icmp); + + struct inet_timewait_death_row tcp_death_row; + struct udp_table *udp_table; + +#if IS_ENABLED(CONFIG_NET_UDP_TUNNEL) + /* Not in a pernet subsys because need to be available at GRO stage */ + struct udp_tunnel_gro udp_tunnel_gro[2]; +#endif + +#ifdef CONFIG_SYSCTL + struct ctl_table_header *forw_hdr; + struct ctl_table_header *frags_hdr; + struct ctl_table_header *ipv4_hdr; + struct ctl_table_header *route_hdr; + struct ctl_table_header *xfrm4_hdr; +#endif + struct ipv4_devconf *devconf_all; + struct ipv4_devconf *devconf_dflt; + struct ip_ra_chain __rcu *ra_chain; + struct mutex ra_mutex; +#ifdef CONFIG_IP_MULTIPLE_TABLES + struct fib_rules_ops *rules_ops; + struct fib_table __rcu *fib_main; + struct fib_table __rcu *fib_default; + spinlock_t fib_table_hash_lock; + unsigned int fib_rules_require_fldissect; + bool fib_has_custom_rules; +#endif + bool fib_has_custom_local_routes; + bool fib_offload_disabled; +#ifdef CONFIG_IP_ROUTE_CLASSID + atomic_t fib_num_tclassid_users; +#endif + struct hlist_head *fib_table_hash; + struct sock *fibnl; + struct hlist_head *fib_info_hash; + unsigned int fib_info_hash_bits; + unsigned int fib_info_cnt; + + struct sock *mc_autojoin_sk; + + struct inet_peer_base *peers; + struct fqdir *fqdir; + + u8 sysctl_icmp_echo_ignore_all; + u8 sysctl_icmp_echo_enable_probe; + u8 sysctl_icmp_echo_ignore_broadcasts; + u8 sysctl_icmp_ignore_bogus_error_responses; + u8 sysctl_icmp_errors_use_inbound_ifaddr; + u8 sysctl_icmp_errors_extension_mask; + int sysctl_icmp_ratelimit; + int sysctl_icmp_ratemask; + int sysctl_icmp_msgs_per_sec; + int sysctl_icmp_msgs_burst; + + u32 ip_rt_min_pmtu; + int ip_rt_mtu_expires; + int ip_rt_min_advmss; + + struct local_ports ip_local_ports; + + u8 sysctl_tcp_ecn; + u8 sysctl_tcp_ecn_option; + u8 sysctl_tcp_ecn_option_beacon; + u8 sysctl_tcp_ecn_fallback; + + u8 sysctl_ip_default_ttl; + u8 sysctl_ip_no_pmtu_disc; + u8 sysctl_ip_fwd_update_priority; + u8 sysctl_ip_nonlocal_bind; + u8 sysctl_ip_autobind_reuse; + /* Shall we try to damage output packets if routing dev changes? */ + u8 sysctl_ip_dynaddr; + u32 sysctl_ip_local_port_step_width; +#ifdef CONFIG_NET_L3_MASTER_DEV + u8 sysctl_raw_l3mdev_accept; +#endif + u8 sysctl_udp_early_demux; + + u8 sysctl_nexthop_compat_mode; + + u8 sysctl_fwmark_reflect; + u8 sysctl_tcp_fwmark_accept; + u8 sysctl_tcp_mtu_probing; + int sysctl_tcp_mtu_probe_floor; + int sysctl_tcp_base_mss; + int sysctl_tcp_probe_threshold; + u32 sysctl_tcp_probe_interval; + + int sysctl_tcp_keepalive_time; + int sysctl_tcp_keepalive_intvl; + u8 sysctl_tcp_keepalive_probes; + + u8 sysctl_tcp_syn_retries; + u8 sysctl_tcp_synack_retries; + u8 sysctl_tcp_syncookies; + u8 sysctl_tcp_migrate_req; + u8 sysctl_tcp_comp_sack_nr; + u8 sysctl_tcp_backlog_ack_defer; + u8 sysctl_tcp_pingpong_thresh; + + u8 sysctl_tcp_retries1; + u8 sysctl_tcp_retries2; + u8 sysctl_tcp_orphan_retries; + u8 sysctl_tcp_tw_reuse; + unsigned int sysctl_tcp_tw_reuse_delay; + int sysctl_tcp_fin_timeout; + u8 sysctl_tcp_sack; + u8 sysctl_tcp_window_scaling; + u8 sysctl_tcp_timestamps; + int sysctl_tcp_rto_min_us; + int sysctl_tcp_rto_max_ms; + u8 sysctl_tcp_recovery; + u8 sysctl_tcp_thin_linear_timeouts; + u8 sysctl_tcp_slow_start_after_idle; + u8 sysctl_tcp_retrans_collapse; + u8 sysctl_tcp_stdurg; + u8 sysctl_tcp_rfc1337; + u8 sysctl_tcp_abort_on_overflow; + u8 sysctl_tcp_fack; /* obsolete */ + int sysctl_tcp_max_reordering; + int sysctl_tcp_adv_win_scale; /* obsolete */ + u8 sysctl_tcp_dsack; + u8 sysctl_tcp_app_win; + u8 sysctl_tcp_frto; + u8 sysctl_tcp_nometrics_save; + u8 sysctl_tcp_no_ssthresh_metrics_save; + u8 sysctl_tcp_workaround_signed_windows; + int sysctl_tcp_challenge_ack_limit; + u8 sysctl_tcp_min_tso_segs; + u8 sysctl_tcp_reflect_tos; + int sysctl_tcp_invalid_ratelimit; + int sysctl_tcp_pacing_ss_ratio; + int sysctl_tcp_pacing_ca_ratio; + unsigned int sysctl_tcp_child_ehash_entries; + int sysctl_tcp_comp_sack_rtt_percent; + unsigned long sysctl_tcp_comp_sack_delay_ns; + unsigned long sysctl_tcp_comp_sack_slack_ns; + int sysctl_max_syn_backlog; + int sysctl_tcp_fastopen; + const struct tcp_congestion_ops __rcu *tcp_congestion_control; + struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; + unsigned int sysctl_tcp_fastopen_blackhole_timeout; + atomic_t tfo_active_disable_times; + unsigned long tfo_active_disable_stamp; + u32 tcp_challenge_timestamp; + u32 tcp_challenge_count; + u8 sysctl_tcp_plb_enabled; + u8 sysctl_tcp_plb_idle_rehash_rounds; + u8 sysctl_tcp_plb_rehash_rounds; + u8 sysctl_tcp_plb_suspend_rto_sec; + int sysctl_tcp_plb_cong_thresh; + + int sysctl_udp_wmem_min; + int sysctl_udp_rmem_min; + + u8 sysctl_fib_notify_on_flag_change; + u8 sysctl_tcp_syn_linear_timeouts; + +#ifdef CONFIG_NET_L3_MASTER_DEV + u8 sysctl_udp_l3mdev_accept; +#endif + + u8 sysctl_igmp_llm_reports; + int sysctl_igmp_max_memberships; + int sysctl_igmp_max_msf; + int sysctl_igmp_qrv; + + struct ping_group_range ping_group_range; + u16 ping_port_rover; + + atomic_t dev_addr_genid; + + unsigned int sysctl_udp_child_hash_entries; + +#ifdef CONFIG_SYSCTL + unsigned long *sysctl_local_reserved_ports; + int sysctl_ip_prot_sock; +#endif + +#ifdef CONFIG_IP_MROUTE +#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES + struct mr_table __rcu *mrt; +#else + struct list_head mr_tables; + struct fib_rules_ops *mr_rules_ops; +#endif + struct fib_notifier_ops *ipmr_notifier_ops; + atomic_t ipmr_seq; + struct mutex mfc_mutex; +#endif +#ifdef CONFIG_IP_ROUTE_MULTIPATH + struct sysctl_fib_multipath_hash_seed sysctl_fib_multipath_hash_seed; + u32 sysctl_fib_multipath_hash_fields; + u8 sysctl_fib_multipath_use_neigh; + u8 sysctl_fib_multipath_hash_policy; +#endif + + struct fib_notifier_ops *notifier_ops; + unsigned int fib_seq; /* writes protected by rtnl_mutex */ + + atomic_t rt_genid; + siphash_key_t ip_id_key; + struct hlist_head *inet_addr_lst; + struct delayed_work addr_chk_work; +}; + +#endif -- cgit v1.3.1