From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, ZhangXiaoxu <zhangxiaoxu5@huawei.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.14 53/53] ipv4: set the tcp_min_rtt_wlen range from 0 to one day
Date: Tue, 30 Apr 2019 13:39:00 +0200 [thread overview]
Message-ID: <20190430113559.919851789@linuxfoundation.org> (raw)
In-Reply-To: <20190430113549.400132183@linuxfoundation.org>
From: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
[ Upstream commit 19fad20d15a6494f47f85d869f00b11343ee5c78 ]
There is a UBSAN report as below:
UBSAN: Undefined behaviour in net/ipv4/tcp_input.c:2877:56
signed integer overflow:
2147483647 * 1000 cannot be represented in type 'int'
CPU: 3 PID: 0 Comm: swapper/3 Not tainted 5.1.0-rc4-00058-g582549e #1
Call Trace:
<IRQ>
dump_stack+0x8c/0xba
ubsan_epilogue+0x11/0x60
handle_overflow+0x12d/0x170
? ttwu_do_wakeup+0x21/0x320
__ubsan_handle_mul_overflow+0x12/0x20
tcp_ack_update_rtt+0x76c/0x780
tcp_clean_rtx_queue+0x499/0x14d0
tcp_ack+0x69e/0x1240
? __wake_up_sync_key+0x2c/0x50
? update_group_capacity+0x50/0x680
tcp_rcv_established+0x4e2/0xe10
tcp_v4_do_rcv+0x22b/0x420
tcp_v4_rcv+0xfe8/0x1190
ip_protocol_deliver_rcu+0x36/0x180
ip_local_deliver+0x15b/0x1a0
ip_rcv+0xac/0xd0
__netif_receive_skb_one_core+0x7f/0xb0
__netif_receive_skb+0x33/0xc0
netif_receive_skb_internal+0x84/0x1c0
napi_gro_receive+0x2a0/0x300
receive_buf+0x3d4/0x2350
? detach_buf_split+0x159/0x390
virtnet_poll+0x198/0x840
? reweight_entity+0x243/0x4b0
net_rx_action+0x25c/0x770
__do_softirq+0x19b/0x66d
irq_exit+0x1eb/0x230
do_IRQ+0x7a/0x150
common_interrupt+0xf/0xf
</IRQ>
It can be reproduced by:
echo 2147483647 > /proc/sys/net/ipv4/tcp_min_rtt_wlen
Fixes: f672258391b42 ("tcp: track min RTT using windowed min-filter")
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
Documentation/networking/ip-sysctl.txt | 1 +
net/ipv4/sysctl_net_ipv4.c | 5 ++++-
2 files changed, 5 insertions(+), 1 deletion(-)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -402,6 +402,7 @@ tcp_min_rtt_wlen - INTEGER
minimum RTT when it is moved to a longer path (e.g., due to traffic
engineering). A longer window makes the filter more resistant to RTT
inflations such as transient congestion. The unit is seconds.
+ Possible values: 0 - 86400 (1 day)
Default: 300
tcp_moderate_rcvbuf - BOOLEAN
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -45,6 +45,7 @@ static int tcp_syn_retries_min = 1;
static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
static int ip_ping_group_range_min[] = { 0, 0 };
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
+static int one_day_secs = 24 * 3600;
/* obsolete */
static int sysctl_tcp_low_latency __read_mostly;
@@ -552,7 +553,9 @@ static struct ctl_table ipv4_table[] = {
.data = &sysctl_tcp_min_rtt_wlen,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &zero,
+ .extra2 = &one_day_secs
},
{
.procname = "tcp_low_latency",
next prev parent reply other threads:[~2019-04-30 12:03 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 11:38 [PATCH 4.14 00/53] 4.14.115-stable review Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 01/53] kbuild: simplify ld-option implementation Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 02/53] cifs: do not attempt cifs operation on smb2+ rename error Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 03/53] tracing: Fix a memory leak by early error exit in trace_pid_write() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 04/53] tracing: Fix buffer_ref pipe ops Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 05/53] zram: pass down the bvec we need to read into in the work struct Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 06/53] lib/Kconfig.debug: fix build error without CONFIG_BLOCK Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 07/53] MIPS: scall64-o32: Fix indirect syscall number load Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 08/53] trace: Fix preempt_enable_no_resched() abuse Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 09/53] IB/rdmavt: Fix frwr memory registration Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 10/53] sched/numa: Fix a possible divide-by-zero Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 11/53] ceph: only use d_name directly when parent is locked Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 12/53] ceph: ensure d_name stability in ceph_dentry_hash() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 13/53] ceph: fix ci->i_head_snapc leak Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 14/53] nfsd: Dont release the callback slot unless it was actually held Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 15/53] sunrpc: dont mark uninitialised items as VALID Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 16/53] Input: synaptics-rmi4 - write config register values to the right offset Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 17/53] vfio/type1: Limit DMA mappings per container Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 18/53] dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 19/53] ARM: 8857/1: efi: enable CP15 DMB instructions before cleaning the cache Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 20/53] drm/vc4: Fix memory leak during gpu reset Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 21/53] Revert "drm/i915/fbdev: Actually configure untiled displays" Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 22/53] drm/vc4: Fix compilation error reported by kbuild test bot Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 23/53] USB: Add new USB LPM helpers Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 24/53] USB: Consolidate LPM checks to avoid enabling LPM twice Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 25/53] ext4: fix some error pointer dereferences Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 26/53] vsock/virtio: fix kernel panic from virtio_transport_reset_no_sock Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 27/53] tipc: handle the err returned from cmd header function Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 28/53] slip: make slhc_free() silently accept an error pointer Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 29/53] intel_th: gth: Fix an off-by-one in output unassigning Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 30/53] fs/proc/proc_sysctl.c: Fix a NULL pointer dereference Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 31/53] ipvs: fix warning on unused variable Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 32/53] binder: fix handling of misaligned binder object Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 33/53] sched/deadline: Correctly handle active 0-lag timers Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 34/53] NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 35/53] netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 36/53] fm10k: Fix a potential NULL pointer dereference Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 37/53] tipc: check bearer name with right length in tipc_nl_compat_bearer_enable Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 38/53] tipc: check link name with right length in tipc_nl_compat_link_set Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 39/53] dm integrity: change memcmp to strncmp in dm_integrity_ctr Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 40/53] x86, retpolines: Raise limit for generating indirect calls from switch-case Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 41/53] x86/retpolines: Disable switch jump tables when retpolines are enabled Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 42/53] mm: Fix warning in insert_pfn() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 43/53] Revert "block/loop: Use global lock for ioctl() operation." Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 44/53] ipv4: add sanity checks in ipv4_link_failure() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 45/53] mlxsw: spectrum: Fix autoneg status in ethtool Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 46/53] net/mlx5e: ethtool, Remove unsupported SFP EEPROM high pages query Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 47/53] net: rds: exchange of 8K and 1M pool Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 48/53] net: stmmac: move stmmac_check_ether_addr() to driver probe Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 49/53] stmmac: pci: Adjust IOT2000 matching Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 50/53] team: fix possible recursive locking when add slaves Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 51/53] net/rose: Convert timers to use timer_setup() Greg Kroah-Hartman
2019-04-30 11:38 ` [PATCH 4.14 52/53] net/rose: fix unbound loop in rose_loopback_timer() Greg Kroah-Hartman
2019-04-30 11:39 ` Greg Kroah-Hartman [this message]
2019-04-30 19:06 ` [PATCH 4.14 00/53] 4.14.115-stable review kernelci.org bot
2019-04-30 22:31 ` shuah
2019-05-01 6:32 ` Naresh Kamboju
2019-05-01 8:25 ` Jon Hunter
2019-05-01 16:44 ` Guenter Roeck
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