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Message-ID: <20180419013855.4tyssb556l4lkgba@wfg-t540p.sh.intel.com>
Date: Thu, 19 Apr 2018 09:38:55 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
linux-kbuild@...r.kernel.org, LKP <lkp@...org>
Subject: [gcc-plugins] c61f13eaa1 BUG: KASAN: use-after-scope in ep_poll at
addr ffff88001ee87d00
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit c61f13eaa1ee17728c41370100d2d45c254ce76f
Author: Kees Cook <keescook@...omium.org>
AuthorDate: Fri Jan 13 11:14:39 2017 -0800
Commit: Kees Cook <keescook@...omium.org>
CommitDate: Wed Jan 18 12:02:35 2017 -0800
gcc-plugins: Add structleak for more stack initialization
This plugin detects any structures that contain __user attributes and
makes sure it is being fully initialized so that a specific class of
information exposure is eliminated. (This plugin was originally designed
to block the exposure of siginfo in CVE-2013-2141.)
Ported from grsecurity/PaX. This version adds a verbose option to the
plugin and the Kconfig.
Signed-off-by: Kees Cook <keescook@...omium.org>
8d4973a1c0 gcc-plugins: add PASS_INFO and build_const_char_string()
c61f13eaa1 gcc-plugins: Add structleak for more stack initialization
c4e0ca7fa2 Merge tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
f0701bf7db Add linux-next specific files for 20180126
+--------------------------------+------------+------------+------------+---------------+
| | 8d4973a1c0 | c61f13eaa1 | c4e0ca7fa2 | next-20180126 |
+--------------------------------+------------+------------+------------+---------------+
| boot_successes | 39 | 0 | 1 | 13 |
| boot_failures | 0 | 13 | 20 | |
| BUG:KASAN:use-after-scope_in_e | 0 | 13 | 20 | |
+--------------------------------+------------+------------+------------+---------------+
[ 28.855033] init: Temporary process spawn error: No such file or directory
[ 28.863505] init: Failed to create pty - disabling logging for job
[ 28.864418] init: Temporary process spawn error: No such file or directory
udevd[253]: failed to execute '/sbin/modprobe' '/sbin/modprobe -bv acpi:LNXSYSTM:': No such file or directory
[ 28.975924] ==================================================================
[ 28.976803] BUG: KASAN: use-after-scope in ep_poll+0xb51/0xc33 at addr ffff88001ee87d00
[ 28.977751] Write of size 16 by task udevadm/248
[ 28.978321] page:ffffea00007ba1c0 count:0 mapcount:0 mapping: (null) index:0x1
[ 28.979273] flags: 0x0()
[ 28.979600] raw: 0000000000000000 0000000000000000 0000000000000001 00000000ffffffff
[ 28.980537] raw: 0000000000000000 dead000000000200 0000000000000000 0000000000000000
[ 28.981458] page dumped because: kasan: bad access detected
[ 28.982135] CPU: 0 PID: 248 Comm: udevadm Not tainted 4.10.0-rc2-00004-gc61f13e #1
[ 28.983038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 28.984135] Call Trace:
[ 28.984611] dump_stack+0x1e/0x20
[ 28.985172] kasan_report+0x32e/0x435
[ 28.985625] ? ep_poll+0xb51/0xc33
[ 28.986053] ? ep_poll+0xb13/0xc33
[ 28.986478] __asan_report_store16_noabort+0x1c/0x1e
[ 28.987286] ep_poll+0xb51/0xc33
[ 28.987803] ? ep_poll_readyevents_proc+0x86/0x86
[ 28.988551] ? sock_enable_timestamp+0xa1/0xa1
[ 28.989255] ? bit_waitqueue+0x34/0x34
[ 28.989831] ? get_usage_char+0x3b/0x3b
[ 28.990398] ? get_usage_char+0x3b/0x3b
[ 28.991120] ? __lock_acquire+0x113d/0x1245
[ 28.991675] ? __context_tracking_exit+0xe4/0x266
[ 28.992348] ? lock_acquire+0x318/0x318
[ 28.992963] ? __fget_light+0x2e6/0x318
[ 28.993566] ? __fget+0x35b/0x35b
[ 28.994101] ? syscall_slow_exit_work+0x591/0x591
[ 28.994850] ? __this_cpu_preempt_check+0x1c/0x1f
[ 28.995590] ? do_task_dead+0x1cb/0x1cb
[ 28.996204] SyS_epoll_wait+0x16e/0x1a2
[ 28.996811] ? SyS_epoll_ctl+0x1571/0x1571
[ 28.997461] do_syscall_64+0x307/0x522
[ 28.998060] ? check_preemption_disabled+0x198/0x1a1
[ 28.998866] ? syscall_return_slowpath+0x25b/0x25b
[ 28.999733] ? context_tracking_user_enter+0x30/0x30
[ 29.000486] ? prepare_exit_to_usermode+0x13e/0x166
[ 29.001217] ? enter_from_user_mode+0x72/0x72
[ 29.001909] entry_SYSCALL64_slow_path+0x25/0x25
[ 29.002627] RIP: 0033:0x7ffb5675cb33
[ 29.003196] RSP: 002b:00007ffe90b896a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
[ 29.004363] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007ffb5675cb33
[ 29.005460] RDX: 0000000000000004 RSI: 00007ffe90b89850 RDI: 0000000000000003
[ 29.006556] RBP: 000055e3eed8e2d0 R08: 000000000000000a R09: 0000000000000000
[ 29.007660] R10: 00000000ffffffff R11: 0000000000000246 R12: 000055e3eed8e110
[ 29.008758] R13: 0000000000000001 R14: 00007ffe90b8985c R15: 0000000000000004
[ 29.009872] Memory state around the buggy address:
[ 29.010618] ffff88001ee87c00: f8 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2 f2 f2
[ 29.011730] ffff88001ee87c80: 00 00 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f2 f2 f2 f2
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.11 v4.10 --
git bisect bad ce70df089143c49385b4f32f39d41fb50fbf6a7c # 11:07 B 0 3 16 0 mm, gup: fix typo in gup_p4d_range()
git bisect bad 94eae8034002401d71ae950106659e16add36e77 # 11:38 B 0 11 24 0 Merge tag 'platform-drivers-x86-v4.11-1' of git://git.infradead.org/linux-platform-drivers-x86
git bisect good 7bb033829ef3ecfc491c0ed0197966e8f197fbdc # 12:12 G 13 0 13 13 Merge tag 'rodata-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
git bisect bad a3919caaa27a5fde1cbda46e394bb17953e104a1 # 12:52 B 0 4 17 0 Merge tag 'rproc-v4.11' of git://github.com/andersson/remoteproc
git bisect bad a27fcb0cd1bcc812017192bdde41cc456dcd6afe # 13:05 B 0 12 25 0 Merge tag 'xfs-4.11-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
git bisect bad 8ff546b801e5cca0337c0f0a7234795d0a6309a1 # 13:22 B 0 3 16 0 Merge tag 'usb-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect bad ff47d8c05019d6e7753cef270d6399cb5a33be57 # 13:42 B 0 7 20 0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
git bisect bad 1e74a2eb1f5cc7f2f2b5aa9c9eeecbcf352220a3 # 13:56 B 0 1 14 0 Merge tag 'gcc-plugins-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
git bisect good e7e04c0c8c7ea931d966e5bd349a0b1c836b1ebf # 14:16 G 12 0 0 0 Merge branch 'for-next/gcc-plugin-infrastructure' into for-linus/gcc-plugins
git bisect bad c054ee3bbf69ebcabb1f3218b7faf4b1b37a8eb6 # 14:32 B 0 3 16 0 Merge branch 'for-next/gcc-plugin/structleak' into for-linus/gcc-plugins
git bisect bad c61f13eaa1ee17728c41370100d2d45c254ce76f # 14:50 B 0 10 23 0 gcc-plugins: Add structleak for more stack initialization
# first bad commit: [c61f13eaa1ee17728c41370100d2d45c254ce76f] gcc-plugins: Add structleak for more stack initialization
git bisect good 8d4973a1c01d4b38871fbc6631e1fdd20e6c9e90 # 15:06 G 39 0 0 0 gcc-plugins: add PASS_INFO and build_const_char_string()
# extra tests with debug options
git bisect bad c61f13eaa1ee17728c41370100d2d45c254ce76f # 15:42 B 0 9 22 0 gcc-plugins: Add structleak for more stack initialization
# extra tests on HEAD of linux-devel/devel-hourly-2018012623
git bisect bad 053f055c57c24ecc91e16dc1056be540bec47d3e # 15:42 B 0 13 29 0 0day head guard for 'devel-hourly-2018012623'
# extra tests on tree/branch linus/master
git bisect bad c4e0ca7fa24137e372d6135fe16e8df8e123f116 # 16:24 B 1 12 0 0 Merge tag 'riscv-for-linus-4.15-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
# extra tests on tree/branch linux-next/master
git bisect good f0701bf7db7ab816244aed52d28ac49f32c8c2c9 # 16:46 G 13 0 0 0 Add linux-next specific files for 20180126
---
0-DAY kernel test infrastructure Open Source Technology Center
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