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Date: Wed, 10 Dec 2014 15:19:40 -0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org
Subject: [ftrace/fgraph/x86] BUG: unable to handle kernel paging request at
c0017eec
Hi Steven,
FYI, here is another bisect result.
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 6a06bdbf7f9c669743f58084991ba280f2925586
Author: Steven Rostedt (Red Hat) <rostedt@...dmis.org>
AuthorDate: Mon Nov 24 21:00:34 2014 -0500
Commit: Steven Rostedt <rostedt@...dmis.org>
CommitDate: Mon Dec 1 14:08:58 2014 -0500
ftrace/fgraph/x86: Have prepare_ftrace_return() take ip as first parameter
The function graph helper function prepare_ftrace_return() which does the work
to hijack the parent pointer has that parent pointer as its first parameter.
Instead, if we make it the second parameter and have ip as the first parameter
(self_addr), then it can use the %rdi from save_mcount_regs that loads it
already.
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1411262304010.3961@nanos
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
+------------------------------------------+------------+------------+------------+
| | f1ab00af81 | 6a06bdbf7f | eda592b769 |
+------------------------------------------+------------+------------+------------+
| boot_successes | 60 | 0 | 0 |
| boot_failures | 0 | 20 | 25 |
| BUG:unable_to_handle_kernel | 0 | 20 | 25 |
| Oops | 0 | 20 | 25 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | 25 |
| EIP_is_at_print_fmt_writeback_work_class | 0 | 0 | 25 |
+------------------------------------------+------------+------------+------------+
[ 1.602245] Warning: could not register all branches stats
[ 1.602660] Warning: could not register annotated branches stats
[ 1.603181] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[ 1.603713] BUG: unable to handle kernel paging request at c0017eec
[ 1.604173] IP: [<c0017eec>] 0xc0017eec
[ 1.604458] *pdpt = 00000000025a0001 *pde = 0000000002e01063 *pte = 8000000000017163
[ 1.605036] Oops: 0011 [#1] SMP DEBUG_PAGEALLOC
[ 1.605386] Modules linked in:
[ 1.605617] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc1-00052-g6a06bdb #53
[ 1.606157] task: c0030000 ti: c0016000 task.ti: c0016000
[ 1.606538] EIP: 0060:[<c0017eec>] EFLAGS: 00010206 CPU: 0
[ 1.606931] EIP is at 0xc0017eec
[ 1.607162] EAX: c20bea51 EBX: c21cd5c5 ECX: ffffffff EDX: c21e3700
[ 1.607597] ESI: c0080980 EDI: d2c5ede0 EBP: c0017eb8 ESP: c0018000
[ 1.608040] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 1.608418] CR0: 8005003b CR2: c0017eec CR3: 025a3000 CR4: 000006b0
[ 1.608860] Stack:
[ 1.609009] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.609638] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.610000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00040000
[ 1.610000] Call Trace:
[ 1.610000] Code: 85 1e c2 e0 84 1e c2 00 00 00 00 a0 09 08 c0 a4 85 d4 c2 51 ea 0b c2 00 7a d4 c2 c0 72 00 d3 00 7a d4 c2 00 00 00 00 e0 ed c5 d2 <0c> 7f 01 c0 bd 16 52 c2 ac 85 d4 c2 00 00 00 00 01 00 00 00 3f
[ 1.610000] EIP: [<c0017eec>] 0xc0017eec SS:ESP 0068:c0018000
[ 1.610000] CR2: 00000000c0017eec
[ 1.610000] ---[ end trace 09bb131480b067b5 ]---
[ 1.610000] Kernel panic - not syncing: Fatal exception
git bisect start eda592b7693fe76f7137bef0816a658846a499dc b2776bf7149bddd1f4161f14f79520f17fc1d71d --
git bisect good bb295316bd72e31c485b27e1744312ba02e2a2a0 # 10:19 20+ 0 Merge remote-tracking branch 'i2c/i2c/for-next'
git bisect good 5f6a791b6e948fb6442a060c5864fd1d938a46c3 # 10:28 20+ 0 Merge remote-tracking branch 'device-mapper/for-next'
git bisect good 1c36827b8a6377c31978e8c1620d928579ce2cd8 # 10:43 20+ 0 Merge remote-tracking branch 'vfio/next'
git bisect good bbdd5e2086cfa3abe3e924fa6722dc1affefba4e # 11:19 20+ 0 Merge remote-tracking branch 'tip/auto-latest'
git bisect good bdf66ea0516dcaf3cd02b046ae3d737aa1a6c705 # 11:26 20+ 0 Merge remote-tracking branch 'edac-amd/for-next'
git bisect bad 9d6ada6afa5f8a4f78e562c7b435ec7fd804df7b # 11:43 0- 20 Merge remote-tracking branch 'ftrace/for-next'
git bisect good 309c0750fce03028565307dc8e369ceed56e295a # 11:56 20+ 0 Merge remote-tracking branch 'irqchip/irqchip/for-next'
git bisect good 9b77215382b42ef9c5b34293ad3a95332e5b71ef # 12:06 20+ 0 seq_buf: Add seq_buf_can_fit() helper function
git bisect good 07f1bc7f8cec0f3493731c8f83ad037f50f7e785 # 12:12 20+ 0 Merge branch 'for-next/ftrace/core' into trace/for-next
git bisect bad eabb8980a96cff42ae70cc6ab143f4003f02c874 # 12:20 0- 20 tracing: Allow NOT to filter AND and OR clauses
git bisect good 527aa75b333f90f4f90ac1730762156680a42fe8 # 12:28 20+ 0 ftrace/x86: Simplify save_mcount_regs on getting RIP
git bisect good f1ab00af816ec8e1ad53229963c863fdd6bcf222 # 12:35 20+ 0 ftrace/x86: Get rid of ftrace_caller_setup
git bisect bad e12c09cf3087b5a184ffeb55ca368e8aa436a3a2 # 12:42 0- 20 tracing: Add NOT to filtering logic
git bisect bad 6a06bdbf7f9c669743f58084991ba280f2925586 # 12:51 0- 20 ftrace/fgraph/x86: Have prepare_ftrace_return() take ip as first parameter
# first bad commit: [6a06bdbf7f9c669743f58084991ba280f2925586] ftrace/fgraph/x86: Have prepare_ftrace_return() take ip as first parameter
git bisect good f1ab00af816ec8e1ad53229963c863fdd6bcf222 # 12:54 60+ 0 ftrace/x86: Get rid of ftrace_caller_setup
# extra tests on HEAD of next/master
git bisect good 5348e33950aad8d5ab06d83cb7ac4e6b4198f773 # 12:55 60+ 284 Add linux-next specific files for 20141209
# extra tests on tree/branch next/master
git bisect good 5348e33950aad8d5ab06d83cb7ac4e6b4198f773 # 12:57 60+ 344 Add linux-next specific files for 20141209
# extra tests on tree/branch linus/master
git bisect good a0e4467726cd26bacb16f13d207ffcfa82ffc07d # 13:03 60+ 0 Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
# extra tests on tree/branch next/master
git bisect good 5348e33950aad8d5ab06d83cb7ac4e6b4198f773 # 13:05 60+ 404 Add linux-next specific files for 20141209
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-client7-28:20141210125059:i386-randconfig-ib0-12060154:3.18.0-rc1-00052-g6a06bdb:53" of type "text/plain" (24415 bytes)
View attachment "config-3.18.0-rc1-00052-g6a06bdb" of type "text/plain" (89309 bytes)
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