https://bugs.dpdk.org/show_bug.cgi?id=797
Bug ID: 797
Summary: [dpdk-21.11]Segmentation fault when start txonly
packet forward after set txpkts=40,64 and txsplit=rand
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: testpmd
Assignee: dev@dpdk.org
Reporter: yux.ji...@intel.com
Target Milestone: ---
Environment
DPDK version:
commit fdab8f2e17493192d555cd88cf28b06269174326 (HEAD, origin/main)
Author: Thomas Monjalon <tho...@monjalon.net>
Date: Sun Aug 8 21:26:58 2021 +0200 version: 21.11-rc0 Start a new
release cycle with empty release notes. The ABI version becomes 22.0.
The map files are updated to the new ABI major number (22).
The ABI exceptions are dropped and CI ABI checks are disabled because
compatibility is not preserved. Signed-off-by: Thomas Monjalon
<tho...@monjalon.net>
Acked-by: Ferruh Yigit <ferruh.yi...@intel.com>
Acked-by: David Marchand <david.march...@redhat.com>
Other software versions:
OS: PRETTY_NAME="Fedora 34 (Server Edition)"/5.12.14-300.fc34.x86_64
Compiler: gcc version 11.1.1 20210531 (Red Hat 11.1.1-3)
Hardware platform: Intel(R) Xeon(R) Gold 6252N CPU @ 2.30GHz
NIC hardware: Ethernet Controller X710 for 10GbE SFP+ 1572
NIC firmware:
[root@fedora dpdk]# ethtool -i enp217s0f0
driver: i40e
version: 2.15.9
firmware-version: 8.30 0x8000a49d 1.2926.0
Test Setup
# Build dpdk
rm -rf x86_64-native-linuxapp-gccCC=gcc meson --werror -Denable_kmods=True
-Dbuildtype=debug -Dlibdir=lib --default-library=static
x86_64-native-linuxapp-gccninja -C x86_64-native-linuxapp-gcc -j 40
# bind nic to vfio-pci and start testpmd
./usertools/dpdk-devbind.py -b vfio-pci d9:00.0 d9:00.1
x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1,2,3,4 -n 4
--file-prefix=dpdk_339481_20210823205202 -- -i
# Set txpkts and txsplit and start
testpmd> set fwd txonly
Set txonly packet forwarding mode
testpmd> set txpkts 40,64
testpmd> set txsplit rand
testpmd> start
testpmd>
Show the output from the previous commands.
testpmd> start
txonly packet forwarding - ports=2 - cores=1 - streams=2 - NUMA support
enabled, MP allocation mode: native
Logical Core 2 (socket 0) forwards packets on 2 streams:
RX P=0/Q=0 (socket 1) -> TX P=1/Q=0 (socket 1) peer=02:00:00:00:00:01
RX P=1/Q=0 (socket 1) -> TX P=0/Q=0 (socket 1) peer=02:00:00:00:00:00 txonly
packet forwarding packets/burst=32
packet len=104 - nb packet segments=2
nb forwarding cores=1 - nb forwarding ports=2
port 0: RX queue number: 1 Tx queue number: 1
Rx offloads=0x0 Tx offloads=0x10000
RX queue: 0
RX desc=256 - RX free threshold=32
RX threshold registers: pthresh=0 hthresh=0 wthresh=0
RX Offloads=0x0
TX queue: 0
TX desc=256 - TX free threshold=32
TX threshold registers: pthresh=32 hthresh=0 wthresh=0
TX offloads=0x10000 - TX RS bit threshold=32
port 1: RX queue number: 1 Tx queue number: 1
Rx offloads=0x0 Tx offloads=0x10000
RX queue: 0
RX desc=256 - RX free threshold=32
RX threshold registers: pthresh=0 hthresh=0 wthresh=0
RX Offloads=0x0
TX queue: 0
TX desc=256 - TX free threshold=32
TX threshold registers: pthresh=32 hthresh=0 wthresh=0
TX offloads=0x10000 - TX RS bit threshold=32
testpmd> Segmentation fault (core dumped)
[root@fedora dpdk]#
Expected Result
No any core dumped
Regression
Is this issue a regression: (Y/N) N
First test with such cmd
Stack Trace or Log
# if set txsplit on, there is no core dumped.
# gdb ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd
./core-lcore-worker-2-46341-1629784290
warning: Unable to find libthread_db matching inferior's thread library, thread
debugging will not be available.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1,2,3,4
-n 4 --file-prefix=dpdk_'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00000000005fbbc6 in copy_buf_to_pkt_segs (buf=0x3de3e3e <pkt_udp_hdr+6>,
len=2, pkt=0x166c5e400, offset=34) at ../app/test-pmd/txonly.c:86
86 seg_buf = rte_pktmbuf_mtod(seg, char *);
[Current thread is 1 (Thread 0x7f47712a0400 (LWP 46344))]
Missing separate debuginfos, use: dnf debuginfo-install
elfutils-libelf-0.185-2.fc34.x86_64 glibc-2.33-5.fc34.x86_64
jansson-2.13.1-2.fc34.x86_64 libfdt-1.6.1-1.fc34.x86_64
libibverbs-34.0-3.fc34.x86_64 libnl3-3.5.0-6.fc34.x86_64
libpcap-1.10.1-1.fc34.x86_64 numactl-libs-2.0.14-3.fc34.x86_64
openssl-libs-1.1.1k-1.fc34.x86_64 zlib-1.2.11-26.fc34.x86_64
(gdb) bt
#0 0x00000000005fbbc6 in copy_buf_to_pkt_segs (buf=0x3de3e3e <pkt_udp_hdr+6>,
len=2, pkt=0x166c5e400, offset=34) at ../app/test-pmd/txonly.c:86
#1 0x00000000005fe51c in copy_buf_to_pkt (buf=0x3de3e38 <pkt_udp_hdr>, len=8,
pkt=0x166c5e400, offset=34) at ../app/test-pmd/txonly.c:100
#2 0x00000000005ff51b in pkt_burst_prepare (pkt=0x166c5e400, mbp=0x17f0f0180,
eth_hdr=0x7f477129b182, vlan_tci=0, vlan_tci_outer=0, ol_flags=0, idx=1,
fs=0x166bbb4c0) at ../app/test-pmd/txonly.c:251
#3 0x000000000060043f in pkt_burst_transmit (fs=0x166bbb4c0) at
../app/test-pmd/txonly.c:372
#4 0x00000000005f0362 in run_pkt_fwd_on_lcore (fc=0x17fb3adc0,
pkt_fwd=0x5ff7eb <pkt_burst_transmit>) at ../app/test-pmd/testpmd.c:2049
#5 0x00000000005f0452 in start_pkt_forward_on_core (fwd_arg=0x17fb3adc0) at
../app/test-pmd/testpmd.c:2075
#6 0x0000000000aa8910 in eal_thread_loop (arg=0x0) at
../lib/eal/linux/eal_thread.c:127
#7 0x00007f477254f299 in start_thread () from /lib64/libpthread.so.0
#8 0x00007f47724776a3 in clone () from /lib64/libc.so.6
(gdb)
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