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Date: Thu, 11 Aug 2022 10:36:14 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Marek Majkowski <marek@...udflare.com>
CC: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
<netdev@...r.kernel.org>, <lkp@...ts.01.org>,
<bpf@...r.kernel.org>, <kernel-team@...udflare.com>,
<ivan@...udflare.com>, <edumazet@...gle.com>,
<davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
<ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
<brakmo@...com>, Marek Majkowski <marek@...udflare.com>
Subject: b75edfb063: divide_error:#[##]
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: b75edfb0639efd402dece99ee19470ba7d9222c1 ("[PATCH net-next v2 1/2] RTAX_INITRWND should be able to set the rcv_ssthresh above 64KiB")
url: https://github.com/intel-lab-lkp/linux/commits/Marek-Majkowski/RTAX_INITRWND-should-be-able-to-bring-the-rcv_ssthresh-above-64KiB/20220729-224048
base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git 6957730e20389a63eb333afb6fcf38b45f549ea8
patch link: https://lore.kernel.org/netdev/20220729143935.2432743-2-marek@cloudflare.com
in testcase: nvml
version: nvml-x86_64-3de7d358f-1_20211217
with following parameters:
test: pmem
group: pmemspoil
nr_pmem: 1
fs: ext4
mount_option: dax
bp_memmap: 32G!4G
ucode: 0x700001c
on test machine: 16 threads 1 sockets Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 167.002883][ T446]
[ 185.985422][ T446] clang -MD -c -o ../nondebug/core/fs_posix.o -std=gnu99 -Wall -Werror -Wmissing-prototypes -Wpointer-arith -Wsign-conversion -Wsign-compare -Wunused-parameter -Wconversion -Wunused-macros -Wmissing-field-initializers -Wunreachable-code-return -Wmissing-variable-declarations -Wfloat-equal -Wswitch-default -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -std=gnu99 -fno-common -pthread -DSRCVERSION="1.11.0+git148.gfe27e1033" -fno-lto -DSDS_ENABLED -DNDCTL_ENABLED=1 -DPAGE_SIZE=4096 -DUSE_VALGRIND -Wno-error -I../include -I../common/ -I../core/ -fPIC fs_posix.c
[ 185.985438][ T446]
[ 205.137489][ T446] clang -MD -c -o ../nondebug/common/ctl_prefault.o -std=gnu99 -Wall -Werror -Wmissing-prototypes -Wpointer-arith -Wsign-conversion -Wsign-compare -Wunused-parameter -Wconversion -Wunused-macros -Wmissing-field-initializers -Wunreachable-code-return -Wmissing-variable-declarations -Wfloat-equal -Wswitch-default -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -std=gnu99 -fno-common -pthread -DSRCVERSION="1.11.0+git148.gfe27e1033" -fno-lto -DSDS_ENABLED -DNDCTL_ENABLED=1 -DPAGE_SIZE=4096 -DUSE_VALGRIND -Wno-error -I/usr/local/include -DUSE_LIBDL -I../include -I../common/ -I../core/ -fPIC ctl_prefault.c
[ 205.137505][ T446]
[ 217.005256][ T6783] divide error: 0000 [#1] SMP KASAN PTI
[ 217.012321][ T6783] CPU: 6 PID: 6783 Comm: sshd Not tainted 5.19.0-rc8-01990-gb75edfb0639e #1
[ 217.022407][ T6783] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016
[ 217.032861][ T6783] RIP: 0010:tcp_rcv_space_adjust (kbuild/src/consumer/net/ipv4/tcp_input.c:740)
[ 217.040305][ T6783] Code: b7 ab 08 06 00 00 31 d2 4c 8b 1c 24 89 ef 49 c1 eb 03 81 c5 80 03 00 00 c1 e7 04 48 63 ff 48 01 c7 44 89 c0 29 c8 48 0f af c7 <48> f7 f1 4c 89 d2 48 c1 ea 03 48 8d 04 47 48 89 44 24 08 48 b8 00
All code
========
0: b7 ab mov $0xab,%bh
2: 08 06 or %al,(%rsi)
4: 00 00 add %al,(%rax)
6: 31 d2 xor %edx,%edx
8: 4c 8b 1c 24 mov (%rsp),%r11
c: 89 ef mov %ebp,%edi
e: 49 c1 eb 03 shr $0x3,%r11
12: 81 c5 80 03 00 00 add $0x380,%ebp
18: c1 e7 04 shl $0x4,%edi
1b: 48 63 ff movslq %edi,%rdi
1e: 48 01 c7 add %rax,%rdi
21: 44 89 c0 mov %r8d,%eax
24: 29 c8 sub %ecx,%eax
26: 48 0f af c7 imul %rdi,%rax
2a:* 48 f7 f1 div %rcx <-- trapping instruction
2d: 4c 89 d2 mov %r10,%rdx
30: 48 c1 ea 03 shr $0x3,%rdx
34: 48 8d 04 47 lea (%rdi,%rax,2),%rax
38: 48 89 44 24 08 mov %rax,0x8(%rsp)
3d: 48 rex.W
3e: b8 .byte 0xb8
...
Code starting with the faulting instruction
===========================================
0: 48 f7 f1 div %rcx
3: 4c 89 d2 mov %r10,%rdx
6: 48 c1 ea 03 shr $0x3,%rdx
a: 48 8d 04 47 lea (%rdi,%rax,2),%rax
e: 48 89 44 24 08 mov %rax,0x8(%rsp)
13: 48 rex.W
14: b8 .byte 0xb8
...
[ 217.063062][ T6783] RSP: 0018:ffffc9000ee37880 EFLAGS: 00010206
[ 217.070673][ T6783] RAX: 0000001248c44d42 RBX: ffff88892254ca00 RCX: 0000000000000000
[ 217.080170][ T6783] RDX: 0000000000000000 RSI: ffffffff8614b880 RDI: 000000000012044a
[ 217.089643][ T6783] RBP: 000000000001034b R08: 00000000000103cd R09: ffff88892254d248
[ 217.099133][ T6783] R10: ffff88892254ca30 R11: 1ffff111244a9a01 R12: ffff88892254d250
[ 217.108597][ T6783] R13: ffff88892254d24c R14: ffff88892254d038 R15: ffff88892254cf74
[ 217.118095][ T6783] FS: 00007f1977fefe40(0000) GS:ffff888bb7500000(0000) knlGS:0000000000000000
[ 217.128557][ T6783] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 217.136676][ T6783] CR2: 000055db10ef5000 CR3: 0000000a41d5e006 CR4: 00000000003706e0
[ 217.146176][ T6783] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 217.155630][ T6783] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 217.165095][ T6783] Call Trace:
[ 217.169853][ T6783] <TASK>
[ 217.174282][ T6783] ? skb_copy_datagram_iter (kbuild/src/consumer/net/core/datagram.c:527)
[ 217.181181][ T6783] tcp_recvmsg_locked (kbuild/src/consumer/net/ipv4/tcp.c:2608)
[ 217.187708][ T6783] ? tcp_update_recv_tstamps (kbuild/src/consumer/net/ipv4/tcp.c:2420)
[ 217.194794][ T6783] ? _raw_spin_lock_bh (kbuild/src/consumer/arch/x86/include/asm/atomic.h:202 kbuild/src/consumer/include/linux/atomic/atomic-instrumented.h:543 kbuild/src/consumer/include/asm-generic/qspinlock.h:111 kbuild/src/consumer/include/linux/spinlock.h:185 kbuild/src/consumer/include/linux/spinlock_api_smp.h:127 kbuild/src/consumer/kernel/locking/spinlock.c:178)
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-5.19.0-rc8-01990-gb75edfb0639e" of type "text/plain" (167754 bytes)
View attachment "job-script" of type "text/plain" (6018 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (31956 bytes)
View attachment "nvml" of type "text/plain" (138011 bytes)
View attachment "job.yaml" of type "text/plain" (4932 bytes)
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