The code manages to access a poisoned adjacency – 0x131313 fill pattern –
copying Neale for an opinion.
D.
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Rajith PR via
lists.fd.io
Sent: Tuesday, June 2, 2020 10:00 AM
To: vpp-dev <vpp-dev@lists.fd.io>
Subject: [vpp-dev] SEGMENTATION FAULT in load_balance_get()
Hello All,
In 19.08 VPP version we are seeing a crash while accessing the
load_balance_pool in load_balanc_get() function. This is happening after
enabling worker threads.
As such the FIB programming is happening in the main thread and in one of the
worker threads we see this crash.
Also, this is seen when we scale to 300K+ ipv4 routes.
Here is the complete stack,
Thread 10 "vpp_wk_0" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fbe4aa8e700 (LWP 333)]
0x00007fbef10636f8 in clib_bitmap_get (ai=0x1313131313131313, i=61) at
/home/ubuntu/Scale/libvpp/src/vppinfra/bitmap.h:201
201 return i0 < vec_len (ai) && 0 != ((ai[i0] >> i1) & 1);
Thread 10 (Thread 0x7fbe4aa8e700 (LWP 333)):
#0 0x00007fbef10636f8 in clib_bitmap_get (ai=0x1313131313131313, i=61) at
/home/ubuntu/Scale/libvpp/src/vppinfra/bitmap.h:201
#1 0x00007fbef10676a8 in load_balance_get (lbi=61) at
/home/ubuntu/Scale/libvpp/src/vnet/dpo/load_balance.h:222
#2 0x00007fbef106890c in ip4_lookup_inline (vm=0x7fbe8a5aa080,
node=0x7fbe8b3fd380, frame=0x7fbe8a5edb40) at
/home/ubuntu/Scale/libvpp/src/vnet/ip/ip4_forward.h:369
#3 0x00007fbef1068ead in ip4_lookup_node_fn_avx2 (vm=0x7fbe8a5aa080,
node=0x7fbe8b3fd380, frame=0x7fbe8a5edb40)
at /home/ubuntu/Scale/libvpp/src/vnet/ip/ip4_forward.c:95
#4 0x00007fbef0c6afec in dispatch_node (vm=0x7fbe8a5aa080,
node=0x7fbe8b3fd380, type=VLIB_NODE_TYPE_INTERNAL,
dispatch_state=VLIB_NODE_STATE_POLLING,
frame=0x7fbe8a5edb40, last_time_stamp=381215594286358) at
/home/ubuntu/Scale/libvpp/src/vlib/main.c:1207
#5 0x00007fbef0c6b7ad in dispatch_pending_node (vm=0x7fbe8a5aa080,
pending_frame_index=2, last_time_stamp=381215594286358)
at /home/ubuntu/Scale/libvpp/src/vlib/main.c:1375
#6 0x00007fbef0c6d3f0 in vlib_main_or_worker_loop (vm=0x7fbe8a5aa080,
is_main=0) at /home/ubuntu/Scale/libvpp/src/vlib/main.c:1826
#7 0x00007fbef0c6dc73 in vlib_worker_loop (vm=0x7fbe8a5aa080) at
/home/ubuntu/Scale/libvpp/src/vlib/main.c:1934
#8 0x00007fbef0cac791 in vlib_worker_thread_fn (arg=0x7fbe8de2a340) at
/home/ubuntu/Scale/libvpp/src/vlib/threads.c:1754
#9 0x00007fbef092da48 in clib_calljmp () from
/home/ubuntu/Scale/libvpp/build-root/install-vpp_debug-native/vpp/lib/libvppinfra.so.1.0.1
#10 0x00007fbe4aa8dec0 in ?? ()
#11 0x00007fbef0ca700c in vlib_worker_thread_bootstrap_fn (arg=0x7fbe8de2a340)
at /home/ubuntu/Scale/libvpp/src/vlib/threads.c:573
Thanks in Advance,
Rajith
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