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Date: Tue, 2 Jun 2015 17:29:36 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Andy Lutomirski <luto@...nel.org>
Cc: fengguang.wu@...el.com, LKP <lkp@...org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [x86, entry] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/traps.c:708
do_debug()
Hi Andy,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/entry
commit ed5b90f697fb8bd7630d44df5933b2cbf61e22be
Author: Andy Lutomirski <luto@...nel.org>
AuthorDate: Sat May 30 10:43:24 2015 -0700
Commit: Andy Lutomirski <luto@...nel.org>
CommitDate: Mon Jun 1 10:47:29 2015 -0700
x86, entry: Add and check a stack canary for the SYSENTER stack
Signed-off-by: Andy Lutomirski <luto@...nel.org>
+------------------------------------------------+------------+------------+------------+
| | 592fe34cc3 | ed5b90f697 | 2361c14dcc |
+------------------------------------------------+------------+------------+------------+
| boot_successes | 60 | 0 | 0 |
| boot_failures | 0 | 20 | 11 |
| WARNING:at_arch/x86/kernel/traps.c:#do_debug() | 0 | 20 | 11 |
| backtrace:init_kprobes | 0 | 20 | 11 |
| backtrace:kernel_init_freeable | 0 | 20 | 11 |
+------------------------------------------------+------------+------------+------------+
[ 1.759634] Kprobe smoke test: started
[ 1.763201] ------------[ cut here ]------------
[ 1.763201] ------------[ cut here ]------------
[ 1.765647] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/traps.c:708 do_debug+0x1b4/0x1d0()
[ 1.765647] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/traps.c:708 do_debug+0x1b4/0x1d0()
[ 1.766509] Overran or corrupted SYSENTER stack
[ 1.766509] Overran or corrupted SYSENTER stack
[ 1.766509] Modules linked in:
[ 1.766509] Modules linked in:
[ 1.766509] CPU: 0 PID: 1 Comm: swapper Not tainted 4.1.0-rc3-00387-ged5b90f #4
[ 1.766509] CPU: 0 PID: 1 Comm: swapper Not tainted 4.1.0-rc3-00387-ged5b90f #4
[ 1.766509] ffffffff8614bd50
[ 1.766509] ffffffff8614bd50 ffffffff861e8e68 ffffffff861e8e68 ffffffff85fd786f ffffffff85fd786f ffffffff861e8ea8 ffffffff861e8ea8
[ 1.766509] ffffffff85c7473f
[ 1.766509] ffffffff85c7473f 0000000000000000 0000000000000000 ffff880000059010 ffff880000059010 ffffffff861e8f58 ffffffff861e8f58
[ 1.766509] 0000000000000000
[ 1.766509] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffffffff861e8f08 ffffffff861e8f08
[ 1.766509] Call Trace:
[ 1.766509] Call Trace:
[ 1.766509] <#DB>
[ 1.766509] <#DB> [<ffffffff85fd786f>] dump_stack+0x19/0x1b
[<ffffffff85fd786f>] dump_stack+0x19/0x1b
[ 1.766509] [<ffffffff85c7473f>] warn_slowpath_common+0x7f/0xc0
[ 1.766509] [<ffffffff85c7473f>] warn_slowpath_common+0x7f/0xc0
[ 1.766509] [<ffffffff85c747c1>] warn_slowpath_fmt+0x41/0x50
[ 1.766509] [<ffffffff85c747c1>] warn_slowpath_fmt+0x41/0x50
[ 1.766509] [<ffffffff85c03114>] do_debug+0x1b4/0x1d0
[ 1.766509] [<ffffffff85c03114>] do_debug+0x1b4/0x1d0
[ 1.766509] [<ffffffff862f9160>] ? debugfs_kprobe_init+0xab/0xab
[ 1.766509] [<ffffffff862f9160>] ? debugfs_kprobe_init+0xab/0xab
[ 1.766509] [<ffffffff85fdfb36>] debug+0x36/0x70
[ 1.766509] [<ffffffff85fdfb36>] debug+0x36/0x70
[ 1.766509] [<ffffffff862f9160>] ? debugfs_kprobe_init+0xab/0xab
[ 1.766509] [<ffffffff862f9160>] ? debugfs_kprobe_init+0xab/0xab
[ 1.766509] [<ffffffff85cdcfd2>] ? kprobe_target+0x2/0x20
[ 1.766509] [<ffffffff85cdcfd2>] ? kprobe_target+0x2/0x20
[ 1.766509] <<EOE>>
[ 1.766509] <<EOE>> [<ffffffff85cdd293>] ? init_test_probes+0x63/0x550
[<ffffffff85cdd293>] ? init_test_probes+0x63/0x550
[ 1.766509] [<ffffffff85ccc043>] ? register_module_notifier+0x13/0x20
[ 1.766509] [<ffffffff85ccc043>] ? register_module_notifier+0x13/0x20
[ 1.766509] [<ffffffff862f9330>] init_kprobes+0x1d0/0x1d9
[ 1.766509] [<ffffffff862f9330>] init_kprobes+0x1d0/0x1d9
[ 1.766509] [<ffffffff85c002b3>] do_one_initcall+0x93/0x1e0
[ 1.766509] [<ffffffff85c002b3>] do_one_initcall+0x93/0x1e0
[ 1.766509] [<ffffffff862e01ee>] kernel_init_freeable+0x1d8/0x25b
[ 1.766509] [<ffffffff862e01ee>] kernel_init_freeable+0x1d8/0x25b
[ 1.766509] [<ffffffff85fd4b60>] ? rest_init+0xc0/0xc0
[ 1.766509] [<ffffffff85fd4b60>] ? rest_init+0xc0/0xc0
[ 1.766509] [<ffffffff85fd4b69>] kernel_init+0x9/0xd0
[ 1.766509] [<ffffffff85fd4b69>] kernel_init+0x9/0xd0
[ 1.766509] [<ffffffff85fdeb4f>] ret_from_fork+0x3f/0x70
[ 1.766509] [<ffffffff85fdeb4f>] ret_from_fork+0x3f/0x70
[ 1.766509] [<ffffffff85fd4b60>] ? rest_init+0xc0/0xc0
[ 1.766509] [<ffffffff85fd4b60>] ? rest_init+0xc0/0xc0
[ 1.766509] ---[ end trace b1f73f7dccccd75e ]---
[ 1.766509] ---[ end trace b1f73f7dccccd75e ]---
git bisect start 2361c14dccac69cefe9699c0e9ded43abdaa2830 c65b99f046843d2455aa231747b5a07a999a9f3d --
git bisect good 19e6b3919d764289337d19cb7d2b674e54e30492 # 12:08 20+ 0 Merge 'omap/for-next' into devel-catchup-201506021106
git bisect bad f6558992ab0f0335453998b88c82cbb79aa06436 # 12:13 0- 14 Merge 'asoc/for-linus' into devel-catchup-201506021106
git bisect bad 2773c7e1a6686033cb6a5826bccaca8527e282ab # 12:18 0- 20 Merge 'target/for-next' into devel-catchup-201506021106
git bisect good b1dae74d1de9190b9bc4522308e7b8f8e3663e7c # 12:22 20+ 0 Merge 'omap/master' into devel-catchup-201506021106
git bisect bad e94d357c6413f77d6ea165684e6115407ce4703a # 12:27 0- 7 Merge 'luto/x86/entry' into devel-catchup-201506021106
git bisect good 51bb92843edcba5a58138cad25ced97923048add # 12:33 20+ 0 x86/asm/entry: Remove SYSCALL_VECTOR
git bisect good cdeb6048940fa4bfb429e2f1cba0d28a11e20cd5 # 12:39 20+ 0 x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers
git bisect bad ed5b90f697fb8bd7630d44df5933b2cbf61e22be # 12:43 0- 20 x86, entry: Add and check a stack canary for the SYSENTER stack
git bisect good 7e23a349bac56aceee44e94abc78e4bcda07157d # 12:51 20+ 0 x86_64, entry: Set up a valid sysenter stack and prepare for 32-bit merge
git bisect good 592fe34cc3e2e3ef7d796827e27d392d7f45cbce # 12:55 20+ 0 x86_64, ia32entry: Replace SWAPGS_UNSAFE_STACK with SWAPGS in sysenter
# first bad commit: [ed5b90f697fb8bd7630d44df5933b2cbf61e22be] x86, entry: Add and check a stack canary for the SYSENTER stack
git bisect good 592fe34cc3e2e3ef7d796827e27d392d7f45cbce # 12:58 60+ 0 x86_64, ia32entry: Replace SWAPGS_UNSAFE_STACK with SWAPGS in sysenter
# extra tests with DEBUG_INFO
git bisect bad ed5b90f697fb8bd7630d44df5933b2cbf61e22be # 13:02 0- 55 x86, entry: Add and check a stack canary for the SYSENTER stack
# extra tests on HEAD of linux-devel/devel-catchup-201506021106
git bisect bad 2361c14dccac69cefe9699c0e9ded43abdaa2830 # 13:02 0- 11 0day head guard for 'devel-catchup-201506021106'
# extra tests on tree/branch luto/x86/entry
git bisect bad d63d27a4946677ef2f706a0cd2cb2752d25ca261 # 13:12 0- 57 [WIP] x86: Rewrite syscall exit code
# extra tests with first bad commit reverted
# extra tests on tree/branch linus/master
git bisect good c46a024ea5eb0165114dbbc8c82c29b7bcf66e71 # 13:18 60+ 0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
# extra tests on tree/branch next/master
git bisect good e430ccc59c12619af6196c34707d3afa0728ca27 # 13:35 60+ 0 Add linux-next specific files for 20150601
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-x86_64.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-enable-kvm
-cpu kvm64
-kernel $kernel
-initrd $initrd
-m 300
-smp 2
-device e1000,netdev=net0
-netdev user,id=net0
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
systemd.log_level=err
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-quantal-ivb41-133:20150602124316:x86_64-randconfig-x0-0602:4.1.0-rc3-00387-ged5b90f:4" of type "text/plain" (130714 bytes)
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