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Message-ID: <20141006005118.GA3773@wfg-t540p.sh.intel.com>
Date: Mon, 6 Oct 2014 08:51:18 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: "H. Peter Anvin" <hpa@...ux.intel.com>,
Jet Chen <jet.chen@...el.com>, Su Tao <tao.su@...el.com>,
Yuanhan Liu <yuanhan.liu@...el.com>, LKP <lkp@...org>,
linux-kernel@...r.kernel.org
Subject: Re: [x86, kaslr] Initramfs unpacking failed: junk in compressed
archive
Hi Kees,
Here is some less reproducible bugs that are bisected to
commit 6145cfe394a7f138f6b64491c5663f97dba12450
Author: Kees Cook <keescook@...omium.org>
AuthorDate: Thu Oct 10 17:18:18 2013 -0700
Commit: H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Sun Oct 13 03:13:13 2013 -0700
x86, kaslr: Raise the maximum virtual address to -1 GiB on x86_64
On 64-bit, this raises the maximum location to -1 GiB (from -1.5 GiB),
the upper limit currently, since the kernel fixmap page mappings need
to be moved to use the other 1 GiB (which would be the theoretical
limit when building with -mcmodel=kernel).
Signed-off-by: Kees Cook <keescook@...omium.org>
Link: http://lkml.kernel.org/r/1381450698-28710-7-git-send-email-keescook@chromium.org
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
+--------------------------------+------------+------------+------------+
| | f32360ef66 | 6145cfe394 | a4c0475ac1 |
+--------------------------------+------------+------------+------------+
| boot_successes | 900 | 291 | 29 |
| boot_failures | 0 | 9 | 2 |
| Initramfs_unpacking_failed | 0 | 7 | 2 |
| BUG:unable_to_handle_kernel | 0 | 6 | 2 |
| Oops | 0 | 1 | 1 |
| EIP_is_at_debug_locks_off | 0 | 1 | 1 |
| general_protection_fault | 0 | 1 | |
| backtrace:set_memory_np | 0 | 1 | |
| backtrace:free_init_pages | 0 | 1 | |
| backtrace:populate_rootfs | 0 | 1 | |
| backtrace:kernel_init_freeable | 0 | 1 | |
| BUG:kernel_boot_hang | 0 | 2 | |
| BUG:unab | 0 | 0 | 1 |
+--------------------------------+------------+------------+------------+
[ 0.378592] PCI: CLS 0 bytes, default 64
[ 0.379897] Unpacking initramfs...
[ 0.379897] Unpacking initramfs...
[ 0.385074] Initramfs unpacking failed: junk in compressed archive
[ 0.385074] Initramfs unpacking failed: junk in compressed archive
[ 0.386848] debug: unmapping init [mem 0xd3ca5000-0xd3fd7fff]
[ 0.386848] debug: unmapping init [mem 0xd3ca5000-0xd3fd7fff]
git bisect start v3.14 v3.13 --
git bisect bad 494479038d97f1b9f76fc633a360a681acdf035c # 03:49 164- 4 Merge tag 'pinctrl-v3.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
git bisect bad 1b17366d695c8ab03f98d0155357e97a427e1dce # 03:52 2- 3 Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
git bisect bad 60eaa0190f6b39dce18eb1975d9773ed8bc9a534 # 03:55 11- 4 Merge tag 'trace-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
git bisect good 74e8ee8262c3f93bbc41804037b43f07b95897bb # 04:00 300+ 46 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 02d0a752460ea5dab34ce36c9ddc9c682e846a0d # 04:03 152- 1 Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
git bisect bad 82b51734b4f228c76b6064b6e899d9d3d4c17c1a # 04:05 10- 4 Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
git bisect bad f4bcd8ccddb02833340652e9f46f5127828eb79d # 04:08 43- 2 Merge branch 'x86-kaslr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good fab5669d556200c4dd119af705bff14085845d1e # 04:14 300+ 7 Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 7fe67a1180db49d41a3f764c379a08f8e31580ec # 04:20 300+ 20 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 6145cfe394a7f138f6b64491c5663f97dba12450 # 04:26 0- 2 x86, kaslr: Raise the maximum virtual address to -1 GiB on x86_64
git bisect good 8ab3820fd5b2896d66da7bb2a906bc382e63e7bc # 04:33 300+ 0 x86, kaslr: Return location from decompress_kernel
git bisect good 82fa9637a2ba285bcc7c5050c73010b2c1b3d803 # 04:41 300+ 0 x86, kaslr: Select random position from e820 maps
git bisect good f32360ef6608434a032dc7ad262d45e9693c27f3 # 04:46 300+ 0 x86, kaslr: Report kernel offset on panic
# first bad commit: [6145cfe394a7f138f6b64491c5663f97dba12450] x86, kaslr: Raise the maximum virtual address to -1 GiB on x86_64
git bisect good f32360ef6608434a032dc7ad262d45e9693c27f3 # 04:54 900+ 0 x86, kaslr: Report kernel offset on panic
git bisect bad a4c0475ac1eb67032e759327a40d8d4b2cf2b988 # 04:56 0- 2 ieee802154: 6lowpan: Drop PACKET_OTHERHOST skbs in 6lowpan
git bisect bad bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9 # 05:18 69- 2 Linux 3.17
git bisect bad 2e1d004b9645628c64a2db55ef6b81fadf5e6e91 # 05:24 41- 1 Add linux-next specific files for 20141003
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=yocto-minimal-i386.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-ivb41-10:20141006042747:i386-randconfig-hxb0-1006:3.12.0-rc4-00007-g6145cfe:138" of type "text/plain" (186295 bytes)
Download attachment "i386-randconfig-hxb0-1006-a4c0475ac1eb67032e759327a40d8d4b2cf2b988-Initramfs-unpacking-failed:-69473.log" of type "application/octet-stream" (53421 bytes)
View attachment "config-3.12.0-rc4-00007-g6145cfe" of type "text/plain" (62684 bytes)
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