On 4/27/2020 10:58 AM, Waiman Long wrote:
On 4/26/20 6:48 AM, kernel test robot wrote:
Greeting,
FYI, we noticed the following commit (built with gcc-7):
commit: 4ea62d6823c55fb914ba1195349b86a50efe8597 ("KEYS: Don't write
out to userspace while holding key semaphore")
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git
queue/5.6
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
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):
+----------------------------------------------------+------------+------------+
| | 0f7bd4ba0b |
4ea62d6823 |
+----------------------------------------------------+------------+------------+
| boot_successes | 5 |
2 |
| boot_failures | 1 |
9 |
| BUG:kernel_hang_in_boot_stage | 1
| |
| BUG:kernel_hang_in_early-boot_stage | 0 |
1 |
| WARNING:at_mm/page_alloc.c:#__alloc_pages_nodemask | 0 |
8 |
| RIP:__alloc_pages_nodemask | 0 |
8 |
+----------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@xxxxxxxxx>
[ 387.389621] WARNING: CPU: 1 PID: 5301 at mm/page_alloc.c:4713
__alloc_pages_nodemask+0x1d1/0x340
[ 387.392619] Modules linked in: 8021q garp stp mrp llc dlci af_key
ieee802154_socket ieee802154 mpls_router ip_tunnel vsock_loopback
vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock
vmw_vmci hidp cmtp kernelcapi bnep rfcomm bluetooth ecdh_generic ecc
rfkill can_bcm can_raw can pptp gre l2tp_ppp l2tp_netlink l2tp_core
ip6_udp_tunnel udp_tunnel pppoe pppox ppp_generic slhc crypto_user
nfnetlink scsi_transport_iscsi dccp_ipv6 atm sctp libcrc32c dccp_ipv4
dccp sr_mod cdrom ata_generic pata_acpi bochs_drm drm_vram_helper
drm_ttm_helper ttm intel_rapl_msr intel_rapl_common drm_kms_helper
snd_pcm syscopyarea crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel sysfillrect snd_timer ppdev snd sysimgblt
fb_sys_fops aesni_intel ata_piix soundcore crypto_simd parport_pc
cryptd joydev drm glue_helper serio_raw pcspkr libata i2c_piix4
parport floppy
[ 387.417621] CPU: 1 PID: 5301 Comm: trinity-c1 Not tainted
5.6.6-00162-g4ea62d6823c55 #1
[ 387.420344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 387.423093] RIP: 0010:__alloc_pages_nodemask+0x1d1/0x340
[ 387.425419] Code: ff ff ff 65 48 8b 04 25 c0 8b 01 00 48 05 60 0c
00 00 41 be 01 00 00 00 48 89 44 24 08 e9 02 ff ff ff 81 e7 00 20 00
00 75 02 <0f> 0b 45 31 f6 eb 95 44 8b 64 24 18 65 8b 05 fc 9f 39 5e
89 c0 48
[ 387.431026] RSP: 0018:ffff9ee900f27e60 EFLAGS: 00010246
[ 387.433373] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX:
0000000000000000
[ 387.435902] RDX: 0000000000000000 RSI: 0000000000000034 RDI:
0000000000000000
[ 387.438438] RBP: 0000000000000034 R08: 0000000000000000 R09:
fffffffffffffff9
[ 387.440946] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000cc0
[ 387.443369] R13: fffffffffffffffb R14: 0000000000000034 R15:
0000000000000000
[ 387.445759] FS: 0000000002a06880(0000) GS:ffff8dfd37d00000(0000)
knlGS:0000000000000000
[ 387.448352] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 387.450614] CR2: 00007f6be3b0f47c CR3: 000000018f17c000 CR4:
00000000000406e0
[ 387.453073] DR0: 00007f6be1da7000 DR1: 0000000000000000 DR2:
0000000000000000
[ 387.455531] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000030602
[ 387.457999] Call Trace:
[ 387.459933] kmalloc_order+0x18/0x70
[ 387.461817] kmalloc_order_trace+0x1d/0xb0
[ 387.463770] keyctl_read_key+0xb6/0x140
[ 387.465697] do_syscall_64+0x5b/0x1f0
[ 387.467572] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 387.469596] RIP: 0033:0x463519
[ 387.471409] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40
00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24
08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db 59 00 00 c3 66 2e 0f 1f 84 00
00 00 00
[ 387.476350] RSP: 002b:00007ffde88f9338 EFLAGS: 00000246 ORIG_RAX:
00000000000000fa
[ 387.479670] RAX: ffffffffffffffda RBX: 00000000000000fa RCX:
0000000000463519
[ 387.481811] RDX: fffffffffffffffb RSI: fffffffffffffffd RDI:
000000000000000b
[ 387.484045] RBP: 00007f6be26d4000 R08: ffffffffffffffe0 R09:
ffffffffffffb1b1
[ 387.486279] R10: fffffffffffffff9 R11: 0000000000000246 R12:
0000000000000002
[ 387.488396] R13: 00007f6be26d4058 R14: 0000000002a06850 R15:
00007f6be26d4000
[ 387.490515] ---[ end trace 3c2d530d0a271c54 ]---
To reproduce:
# build kernel
cd linux
cp config-5.6.6-00162-g4ea62d6823c55 .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 (
To fix that, we have to backport the commit 4f0882491a14 ("KEYS: Avoid
false positive ENOMEM error on key read") to 5.6-stable as well.
Cheers,
Longman
Thanks a lot, cc stable@xxxxxxxxxxxxxxx
Best Regards,
Rong Chen
