From: shaozhengchao <shaozhengchao@huawei.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
<stable@vger.kernel.org>
Cc: <patches@lists.linux.dev>, syzbot <syzkaller@googlegroups.com>,
Eric Dumazet <edumazet@google.com>,
Kuniyuki Iwashima <kuniyu@amazon.com>,
Jakub Kicinski <kuba@kernel.org>
Subject: Re: [PATCH 5.4 098/107] tcp: Clean up kernel listeners reqsk in inet_twsk_purge()
Date: Mon, 6 May 2024 11:46:01 +0800 [thread overview]
Message-ID: <539775fb-da20-b39c-c131-ff5b22825756@huawei.com> (raw)
In-Reply-To: <4ebb4956-65ed-fb35-d3ff-b00be6322527@huawei.com>
On 2024/5/6 9:34, shaozhengchao wrote:
>
>
> On 2024/4/30 18:40, Greg Kroah-Hartman wrote:
>> 5.4-stable review patch. If anyone has any objections, please let me
>> know.
>>
>> ------------------
>>
>> From: Kuniyuki Iwashima <kuniyu@amazon.com>
>>
>> commit 740ea3c4a0b2e326b23d7cdf05472a0e92aa39bc upstream.
>>
>> Eric Dumazet reported a use-after-free related to the per-netns ehash
>> series. [0]
>>
>> When we create a TCP socket from userspace, the socket always holds a
>> refcnt of the netns. This guarantees that a reqsk timer is always fired
>> before netns dismantle. Each reqsk has a refcnt of its listener, so the
>> listener is not freed before the reqsk, and the net is not freed before
>> the listener as well.
>>
>> OTOH, when in-kernel users create a TCP socket, it might not hold a
>> refcnt
>> of its netns. Thus, a reqsk timer can be fired after the netns dismantle
>> and access freed per-netns ehash.
>>
>> To avoid the use-after-free, we need to clean up TCP_NEW_SYN_RECV sockets
>> in inet_twsk_purge() if the netns uses a per-netns ehash.
>>
>> [0]:
>> https://lore.kernel.org/netdev/CANn89iLXMup0dRD_Ov79Xt8N9FM0XdhCHEN05sf3eLwxKweM6w@mail.gmail.com/
>>
>> BUG: KASAN: use-after-free in tcp_or_dccp_get_hashinfo
>> include/net/inet_hashtables.h:181 [inline]
>> BUG: KASAN: use-after-free in reqsk_queue_unlink+0x320/0x350
>> net/ipv4/inet_connection_sock.c:913
>> Read of size 8 at addr ffff88807545bd80 by task syz-executor.2/8301
>>
>> CPU: 1 PID: 8301 Comm: syz-executor.2 Not tainted
>> 6.0.0-syzkaller-02757-gaf7d23f9d96a #0
>> Hardware name: Google Google Compute Engine/Google Compute Engine,
>> BIOS Google 09/22/2022
>> Call Trace:
>> <IRQ>
>> __dump_stack lib/dump_stack.c:88 [inline]
>> dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
>> print_address_description mm/kasan/report.c:317 [inline]
>> print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
>> kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
>> tcp_or_dccp_get_hashinfo include/net/inet_hashtables.h:181 [inline]
>> reqsk_queue_unlink+0x320/0x350 net/ipv4/inet_connection_sock.c:913
>> inet_csk_reqsk_queue_drop net/ipv4/inet_connection_sock.c:927 [inline]
>> inet_csk_reqsk_queue_drop_and_put net/ipv4/inet_connection_sock.c:939
>> [inline]
>> reqsk_timer_handler+0x724/0x1160 net/ipv4/inet_connection_sock.c:1053
>> call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
>> expire_timers kernel/time/timer.c:1519 [inline]
>> __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
>> __run_timers kernel/time/timer.c:1768 [inline]
>> run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
>> __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
>> invoke_softirq kernel/softirq.c:445 [inline]
>> __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
>> irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
>> sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
>> </IRQ>
>>
>> Fixes: d1e5e6408b30 ("tcp: Introduce optional per-netns ehash.")
>> Reported-by: syzbot <syzkaller@googlegroups.com>
>> Reported-by: Eric Dumazet <edumazet@google.com>
>> Suggested-by: Eric Dumazet <edumazet@google.com>
>> Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
>> Reviewed-by: Eric Dumazet <edumazet@google.com>
>> Link: https://lore.kernel.org/r/20221012145036.74960-1-kuniyu@amazon.com
>> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
>> [shaozhengchao: resolved conflicts in 5.10]
>> Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
>> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> ---
>> net/ipv4/inet_timewait_sock.c | 15 ++++++++++++++-
>> 1 file changed, 14 insertions(+), 1 deletion(-)
>>
>> --- a/net/ipv4/inet_timewait_sock.c
>> +++ b/net/ipv4/inet_timewait_sock.c
>> @@ -268,8 +268,21 @@ restart_rcu:
>> rcu_read_lock();
>> restart:
>> sk_nulls_for_each_rcu(sk, node, &head->chain) {
>> - if (sk->sk_state != TCP_TIME_WAIT)
>> + if (sk->sk_state != TCP_TIME_WAIT) {
>> + /* A kernel listener socket might not hold refcnt for
>> net,
>> + * so reqsk_timer_handler() could be fired after net is
>> + * freed. Userspace listener and reqsk never exist
>> here.
>> + */
>> + if (unlikely(sk->sk_state == TCP_NEW_SYN_RECV &&
>> + hashinfo->pernet)) {
>
> Hi Greg:
> I'm very very sorry, there's no pernet variable in the struct
> hashinfo. The pernet variable is introduced from v6.1-rc1. This patch
> has a problem and cannot be merged.
>
> Zhengchao Shao
>> + struct request_sock *req = inet_reqsk(sk);
>> +
>> +
>> inet_csk_reqsk_queue_drop_and_put(req->rsk_listener, req);
>> + }
>> +
>> continue;
>> + }
>> +
>> tw = inet_twsk(sk);
>> if ((tw->tw_family != family) ||
>> refcount_read(&twsk_net(tw)->count))
>>
>>
Hi Greg:
I'm sorry to bother you. Revert two patches, because when the ("tcp:
Clean up kernel listeners reqsk in inet_twsk_purge()") patch is
incorporated separately, which will cause compilation failure. To fix
CVE-2024-26865, should the two patches be combined into one?
Zhengchao Shao
next prev parent reply other threads:[~2024-05-06 3:46 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 10:39 [PATCH 5.4 000/107] 5.4.275-rc1 review Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 001/107] batman-adv: Avoid infinite loop trying to resize local TT Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 002/107] Bluetooth: Fix memory leak in hci_req_sync_complete() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 003/107] nouveau: fix function cast warning Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 004/107] net: openvswitch: fix unwanted error log on timeout policy probing Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 005/107] u64_stats: fix u64_stats_init() for lockdep when used repeatedly in one file Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 006/107] geneve: fix header validation in geneve[6]_xmit_skb Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 007/107] ipv6: fib: hide unused pn variable Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 008/107] ipv4/route: avoid unused-but-set-variable warning Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 009/107] ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 010/107] net/mlx5: Properly link new fs rules into the tree Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 011/107] af_unix: Do not use atomic ops for unix_sk(sk)->inflight Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 012/107] af_unix: Fix garbage collector racing against connect() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 013/107] net: ena: Fix potential sign extension issue Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 014/107] btrfs: qgroup: correctly model root qgroup rsv in convert Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 015/107] drm/client: Fully protect modes[] with dev->mode_config.mutex Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 016/107] vhost: Add smp_rmb() in vhost_vq_avail_empty() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 017/107] selftests: timers: Fix abs() warning in posix_timers test Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 018/107] x86/apic: Force native_apic_mem_read() to use the MOV instruction Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 019/107] btrfs: record delayed inode root in transaction Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 020/107] selftests/ftrace: Limit length in subsystem-enable tests Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 021/107] kprobes: Fix possible use-after-free issue on kprobe registration Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 022/107] Revert "tracing/trigger: Fix to return error if failed to alloc snapshot" Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 023/107] netfilter: nf_tables: Fix potential data-race in __nft_expr_type_get() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 024/107] tun: limit printing rate when illegal packet received by tun dev Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 025/107] RDMA/rxe: Fix the problem "mutex_destroy missing" Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 026/107] RDMA/mlx5: Fix port number for counter query in multi-port configuration Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 027/107] drm: nv04: Fix out of bounds access Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 028/107] clk: Remove prepare_lock hold assertion in __clk_release() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 029/107] clk: Mark all_lists as const Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 030/107] clk: remove extra empty line Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 031/107] clk: Print an info line before disabling unused clocks Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 032/107] clk: Initialize struct clk_core kref earlier Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 033/107] clk: Get runtime PM before walking tree during disable_unused Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 034/107] x86/cpufeatures: Fix dependencies for GFNI, VAES, and VPCLMULQDQ Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 035/107] binder: check offset alignment in binder_get_object() Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 036/107] comedi: vmk80xx: fix incomplete endpoint checking Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 037/107] serial/pmac_zilog: Remove flawed mitigation for rx irq flood Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 038/107] USB: serial: option: add Fibocom FM135-GL variants Greg Kroah-Hartman
2024-04-30 10:39 ` [PATCH 5.4 039/107] USB: serial: option: add support for Fibocom FM650/FG650 Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 040/107] USB: serial: option: add Lonsung U8300/U9300 product Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 041/107] USB: serial: option: support Quectel EM060K sub-models Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 042/107] USB: serial: option: add Rolling RW101-GL and RW135-GL support Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 043/107] USB: serial: option: add Telit FN920C04 rmnet compositions Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 044/107] Revert "usb: cdc-wdm: close race between read and workqueue" Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 045/107] usb: dwc2: host: Fix dereference issue in DDMA completion flow Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 046/107] usb: Disable USB3 LPM at shutdown Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 047/107] speakup: Avoid crash on very long word Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 048/107] fs: sysfs: Fix reference leak in sysfs_break_active_protection() Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 049/107] nouveau: fix instmem race condition around ptr stores Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 050/107] nilfs2: fix OOB in nilfs_set_de_type Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 051/107] KVM: async_pf: Cleanup kvm_setup_async_pf() Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 052/107] arm64: dts: rockchip: fix alphabetical ordering RK3399 puma Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 053/107] arm64: dts: rockchip: enable internal pull-up on PCIE_WAKE# for RK3399 Puma Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 054/107] arm64: dts: mediatek: mt8183: Add power-domains properity to mfgcfg Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 055/107] arm64: dts: mediatek: mt7622: fix IR nodename Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 056/107] arm64: dts: mediatek: mt7622: fix ethernet controller "compatible" Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 057/107] arm64: dts: mediatek: mt7622: drop "reset-names" from thermal block Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 058/107] arm64: dts: mt2712: add ethernet device node Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 059/107] arm64: dts: mediatek: mt2712: fix validation errors Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 060/107] ARC: [plat-hsdk]: Remove misplaced interrupt-cells property Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 061/107] vxlan: drop packets from invalid src-address Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 062/107] mlxsw: core: Unregister EMAD trap using FORWARD action Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 063/107] NFC: trf7970a: disable all regulators on removal Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 064/107] net: usb: ax88179_178a: stop lying about skb->truesize Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 065/107] net: gtp: Fix Use-After-Free in gtp_dellink Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 066/107] ipvs: Fix checksumming on GSO of SCTP packets Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 067/107] net: openvswitch: Fix Use-After-Free in ovs_ct_exit Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 068/107] mlxsw: spectrum_acl_tcam: Fix race during rehash delayed work Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 069/107] mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 070/107] mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 071/107] mlxsw: spectrum_acl_tcam: Rate limit error message Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 072/107] mlxsw: spectrum_acl_tcam: Fix memory leak during rehash Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 073/107] mlxsw: spectrum_acl_tcam: Fix warning " Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 074/107] mlxsw: spectrum_acl_tcam: Fix incorrect list API usage Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 075/107] mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 076/107] i40e: Do not use WQ_MEM_RECLAIM flag for workqueue Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 077/107] iavf: Fix TC config comparison with existing adapter TC config Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 078/107] af_unix: Suppress false-positive lockdep splat for spin_lock() in __unix_gc() Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 079/107] serial: core: Provide port lock wrappers Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 080/107] serial: mxs-auart: add spinlock around changing cts state Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 081/107] drm/amdgpu: restrict bo mapping within gpu address limits Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 082/107] amdgpu: validate offset_in_bo of drm_amdgpu_gem_va Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 083/107] drm/amdgpu: validate the parameters of bo mapping operations more clearly Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 084/107] Revert "crypto: api - Disallow identical driver names" Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 085/107] net/mlx5e: Fix a race in command alloc flow Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 086/107] tracing: Show size of requested perf buffer Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 087/107] tracing: Increase PERF_MAX_TRACE_SIZE to handle Sentinel1 and docker together Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 088/107] Bluetooth: Fix type of len in {l2cap,sco}_sock_getsockopt_old() Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 089/107] Bluetooth: btusb: Add Realtek RTL8852BE support ID 0x0bda:0x4853 Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 090/107] btrfs: fix information leak in btrfs_ioctl_logical_to_ino() Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 091/107] arm64: dts: rockchip: enable internal pull-up for Q7_THRM# on RK3399 Puma Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 092/107] drm/amdgpu: Fix leak when GPU memory allocation fails Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 093/107] irqchip/gic-v3-its: Prevent double free on error Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 094/107] ethernet: Add helper for assigning packet type when dest address does not match device address Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 095/107] net: b44: set pause params only when interface is up Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 096/107] stackdepot: respect __GFP_NOLOCKDEP allocation flag Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 097/107] mtd: diskonchip: work around ubsan link failure Greg Kroah-Hartman
2024-04-30 10:40 ` [PATCH 5.4 098/107] tcp: Clean up kernel listeners reqsk in inet_twsk_purge() Greg Kroah-Hartman
2024-05-06 1:34 ` shaozhengchao
2024-05-06 3:46 ` shaozhengchao [this message]
2024-04-30 10:40 ` [PATCH 5.4 099/107] tcp: Fix NEW_SYN_RECV handling " Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 100/107] dmaengine: owl: fix register access functions Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 101/107] idma64: Dont try to serve interrupts when device is powered off Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 102/107] i2c: smbus: fix NULL function pointer dereference Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 103/107] HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 104/107] bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 105/107] dm: limit the number of targets and parameter size area Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 106/107] udp: preserve the connected status if only UDP cmsg Greg Kroah-Hartman
2024-04-30 10:41 ` [PATCH 5.4 107/107] serial: core: fix kernel-doc for uart_port_unlock_irqrestore() Greg Kroah-Hartman
2024-04-30 11:44 ` [PATCH 5.4 000/107] 5.4.275-rc1 review Jon Hunter
2024-04-30 12:10 ` Harshit Mogalapalli
2024-04-30 13:38 ` Greg Kroah-Hartman
2024-05-02 3:11 ` Shuah Khan
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