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Date: Mon, 21 Oct 2019 16:53:05 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Vito Caputo <vcaputo@...garu.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, lkp@...ts.01.org
Subject: [net] 635f03c839: WARNING:at_net/core/datagram.c:#__skb_datagram_iter
FYI, we noticed the following commit (built with gcc-7):
commit: 635f03c839fb2c207dc2e2cea65d382a0798abea ("[PATCH] net: core: datagram: tidy up copy functions a bit")
url: https://github.com/0day-ci/linux/commits/Vito-Caputo/net-core-datagram-tidy-up-copy-functions-a-bit/20191013-002125
in testcase: packetdrill
with following parameters:
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-----------------------------------------------------+------------+------------+
| | 524900a212 | 635f03c839 |
+-----------------------------------------------------+------------+------------+
| boot_successes | 15 | 8 |
| boot_failures | 0 | 20 |
| WARNING:at_net/core/datagram.c:#__skb_datagram_iter | 0 | 20 |
| RIP:__skb_datagram_iter | 0 | 20 |
+-----------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 24.142627] WARNING: CPU: 0 PID: 5761 at net/core/datagram.c:434 __skb_datagram_iter+0x1bb/0x280
[ 24.143997] Modules linked in: tun intel_rapl_msr intel_rapl_common sr_mod cdrom crct10dif_pclmul sg crc32_pclmul ata_generic crc32c_intel pata_acpi ghash_clmulni_intel bochs_drm drm_vram_helper ttm drm_kms_helper ppdev syscopyarea sysfillrect sysimgblt fb_sys_fops drm snd_pcm aesni_intel crypto_simd snd_timer cryptd snd glue_helper soundcore joydev pcspkr serio_raw ata_piix libata i2c_piix4 floppy parport_pc parport ip_tables
[ 24.149092] CPU: 0 PID: 5761 Comm: packetdrill Not tainted 5.4.0-rc1-00465-g635f03c839fb2 #1
[ 24.150229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 24.151339] RIP: 0010:__skb_datagram_iter+0x1bb/0x280
[ 24.152045] Code: f2 fe ff ff 48 8b 44 24 28 44 8b 44 24 20 4c 8b 4c 24 18 44 8b 5c 24 14 8b 90 bc 00 00 00 48 8b 80 c0 00 00 00 e9 13 ff ff ff <0f> 0b e9 43 ff ff ff 4c 89 e1 4c 8b 69 08 4d 85 ed 74 6f 44 0f b6
[ 24.154518] RSP: 0018:ffffac078290faf8 EFLAGS: 00010297
[ 24.155226] RAX: ffff96ed8afac800 RBX: 0000000000000000 RCX: ffff96ed8afacac0
[ 24.156162] RDX: 00000000000002c0 RSI: 0000000000000000 RDI: ffff96ed06da6d00
[ 24.157119] RBP: 0000000000000000 R08: 0000000000000410 R09: 0000000000000030
[ 24.158036] R10: ffffac078290fc50 R11: 0000000000000000 R12: ffff96ed8afacaf0
[ 24.158979] R13: 0000000000000034 R14: 0000000000000000 R15: 0000000000000034
[ 24.159919] FS: 0000000001e39880(0000) GS:ffff96edffc00000(0000) knlGS:0000000000000000
[ 24.160991] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 24.161750] CR2: 000000000188d1e0 CR3: 00000001df2de000 CR4: 00000000000406f0
[ 24.162699] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 24.163646] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 24.164589] Call Trace:
[ 24.164928] ? skb_copy_datagram_iter+0xa0/0xa0
[ 24.165580] skb_copy_datagram_iter+0x3b/0xa0
[ 24.166183] ipv6_recv_error+0xa1/0x3d0
[ 24.166718] ? ip_rcv_finish_core+0x10c/0x390
[ 24.167434] ? ip_rcv_finish+0x62/0x90
[ 24.167966] ? ip_rcv+0xd1/0xe0
[ 24.168383] ? tcp_recvmsg+0x791/0xb90
[ 24.168875] ? ip6_datagram_recv_specific_ctl+0x580/0x580
[ 24.169602] tcp_recvmsg+0x791/0xb90
[ 24.170078] ? rw_copy_check_uvector+0x5b/0x150
[ 24.170705] ? import_iovec+0x36/0xf0
[ 24.171214] inet6_recvmsg+0x5d/0x100
[ 24.171703] ___sys_recvmsg+0xf5/0x240
[ 24.172226] ? __might_fault+0x2b/0x30
[ 24.172748] ? __might_fault+0x2b/0x30
[ 24.173271] ? sock_getsockopt+0x3d4/0xb90
[ 24.173842] ? __sys_recvmsg+0x5b/0xa0
[ 24.174332] __sys_recvmsg+0x5b/0xa0
[ 24.174828] do_syscall_64+0x5b/0x1d0
[ 24.175901] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 24.177116] RIP: 0033:0x42db60
[ 24.178108] Code: 40 00 41 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 03 f7 ff ff 48 63 fb 41 89 c0 49 63 d4 48 89 ee b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1b 44 89 c7 48 89 44 24 08 e8 3b f7 ff ff 48
[ 24.181690] RSP: 002b:00007ffd8ff5dff0 EFLAGS: 00000293 ORIG_RAX: 000000000000002f
[ 24.183219] RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 000000000042db60
[ 24.184724] RDX: 0000000000002000 RSI: 0000000001e40d90 RDI: 0000000000000009
[ 24.186296] RBP: 0000000001e40d90 R08: 0000000000000000 R09: 00000000000007e0
[ 24.187797] R10: 0000000000000040 R11: 0000000000000293 R12: 0000000000002000
[ 24.189236] R13: 0000000000434bc0 R14: 0000000000000000 R15: 0000000000000000
[ 24.190659] ---[ end trace 2cde539dc387f671 ]---
To reproduce:
# build kernel
cd linux
cp config-5.4.0-rc1-00465-g635f03c839fb2 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.4.0-rc1-00465-g635f03c839fb2" of type "text/plain" (200590 bytes)
View attachment "job-script" of type "text/plain" (4892 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (27764 bytes)
View attachment "packetdrill" of type "text/plain" (25946 bytes)
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