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Date: Thu, 30 Nov 2017 10:26:55 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: linux-kernel@...r.kernel.org
Cc: Petr Mladek <pmladek@...e.com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Ingo Molnar <mingo@...nel.org>,
Aleksey Makarov <aleksey.makarov@...aro.org>,
Nicolas Pitre <nicolas.pitre@...aro.org>,
Nikitas Angelinas <nikitas.angelinas@...il.com>, lkp@...org,
Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com
Subject: [ 0.003333] BUG: KASAN: use-after-scope in
console_unlock+0x605/0xcc0
Hello,
FYI this happens in mainline kernel v4.15-rc1 .
It shows up after v4.14 . Bisect is on the way.
It occurs in 4 out of 4 boots.
[ 0.003333] RCU callback double-/use-after-free debug enabled.
[ 0.003333] RCU CPU stall warnings timeout set to 100 (rcu_cpu_stall_timeout).
[ 0.003333] Tasks RCU enabled.
[ 0.003333] NR_IRQS: 4352, nr_irqs: 48, preallocated irqs: 16
[ 0.003333] ==================================================================
[ 0.003333] BUG: KASAN: use-after-scope in console_unlock+0x605/0xcc0:
atomic_read at arch/x86/include/asm/atomic.h:27
(inlined by) static_key_count at include/linux/jump_label.h:191
(inlined by) static_key_false at include/linux/jump_label.h:201
(inlined by) trace_console_rcuidle at include/trace/events/printk.h:10
(inlined by) call_console_drivers at kernel/printk/printk.c:1556
(inlined by) console_unlock at kernel/printk/printk.c:2233
[ 0.003333] Write of size 4 at addr ffffffff83607aa0 by task swapper/0
[ 0.003333]
[ 0.003333] CPU: 0 PID: 0 Comm: swapper Not tainted 4.15.0-rc1 #1
[ 0.003333] Call Trace:
[ 0.003333] ? print_address_description+0x4f/0x3c0:
print_address_description at mm/kasan/report.c:253
[ 0.003333] ? console_unlock+0x605/0xcc0:
atomic_read at arch/x86/include/asm/atomic.h:27
(inlined by) static_key_count at include/linux/jump_label.h:191
(inlined by) static_key_false at include/linux/jump_label.h:201
(inlined by) trace_console_rcuidle at include/trace/events/printk.h:10
(inlined by) call_console_drivers at kernel/printk/printk.c:1556
(inlined by) console_unlock at kernel/printk/printk.c:2233
[ 0.003333] ? kasan_report+0x304/0x390:
kasan_report_error at mm/kasan/report.c:352
(inlined by) kasan_report at mm/kasan/report.c:409
[ 0.003333] ? console_unlock+0x605/0xcc0:
atomic_read at arch/x86/include/asm/atomic.h:27
(inlined by) static_key_count at include/linux/jump_label.h:191
(inlined by) static_key_false at include/linux/jump_label.h:201
(inlined by) trace_console_rcuidle at include/trace/events/printk.h:10
(inlined by) call_console_drivers at kernel/printk/printk.c:1556
(inlined by) console_unlock at kernel/printk/printk.c:2233
[ 0.003333] ? wake_up_klogd+0x180/0x180:
console_unlock at kernel/printk/printk.c:2138
[ 0.003333] ? _raw_spin_unlock_irqrestore+0xcf/0xf0:
__raw_spin_unlock_irqrestore at include/linux/spinlock_api_smp.h:161
(inlined by) _raw_spin_unlock_irqrestore at kernel/locking/spinlock.c:191
[ 0.003333] ? __down_trylock_console_sem+0xf8/0x120:
__down_trylock_console_sem at kernel/printk/printk.c:234
[ 0.003333] ? __down_trylock_console_sem+0x106/0x120:
__down_trylock_console_sem at kernel/printk/printk.c:235
[ 0.003333] ? vprintk_emit+0x63e/0x6f0:
vprintk_emit at kernel/printk/printk.c:1757
[ 0.003333] ? vprintk_func+0x11e/0x130:
vprintk_func at kernel/printk/printk_safe.c:379
[ 0.003333] ? printk+0xaf/0xcf:
printk at kernel/printk/printk.c:1824
[ 0.003333] ? show_regs_print_info+0x40/0x40:
printk at kernel/printk/printk.c:1824
[ 0.003333] ? __flush_tlb_all+0x1e/0x31:
__flush_tlb_global at arch/x86/include/asm/paravirt.h:298
(inlined by) __flush_tlb_all at arch/x86/include/asm/tlbflush.h:293
[ 0.003333] ? native_flush_tlb_global+0x5/0xa0:
native_flush_tlb_global at arch/x86/kernel/paravirt.c:199
[ 0.003333] ? kasan_init+0x276/0x306:
kasan_init at arch/x86/mm/kasan_init_64.c:349
[ 0.003333] ? setup_arch+0x1bb0/0x1cad:
setup_arch at arch/x86/kernel/setup.c:1236
[ 0.003333] ? reserve_standard_io_resources+0x88/0x88:
setup_arch at arch/x86/kernel/setup.c:829
[ 0.003333] ? vprintk_emit+0x6dc/0x6f0:
vprintk_emit at kernel/printk/printk.c:1761
[ 0.003333] ? vprintk_func+0x125/0x130:
vprintk_func at kernel/printk/printk_safe.c:380
[ 0.003333] ? printk+0xaf/0xcf:
printk at kernel/printk/printk.c:1824
[ 0.003333] ? show_regs_print_info+0x40/0x40:
printk at kernel/printk/printk.c:1824
[ 0.003333] ? trace_hardirqs_on+0x220/0x220:
trace_hardirqs_off at kernel/trace/trace_irqsoff.c:799
[ 0.003333] ? __early_make_pgtable+0x2a5/0x308:
__early_make_pgtable at arch/x86/kernel/head64.c:251
[ 0.003333] ? boot_cpu_init+0x16/0x56:
set_bit at arch/x86/include/asm/bitops.h:76
(inlined by) cpumask_set_cpu at include/linux/cpumask.h:297
(inlined by) set_cpu_online at include/linux/cpumask.h:799
(inlined by) boot_cpu_init at kernel/cpu.c:2012
[ 0.003333] ? start_kernel+0xe7/0x8cd:
add_latent_entropy at include/linux/random.h:26
(inlined by) start_kernel at init/main.c:535
[ 0.003333] ? thread_stack_cache_init+0x37/0x37
[ 0.003333] ? x86_cpuid_vendor+0xbe/0xd0:
x86_cpuid_vendor at arch/x86/include/asm/microcode.h:125
[ 0.003333] ? x86_family+0x2f/0x40:
x86_family at arch/x86/lib/cpu.c:14
[ 0.003333] ? load_ucode_bsp+0x3c4/0x46f:
load_ucode_bsp at arch/x86/kernel/cpu/microcode/core.c:189
[ 0.003333] ? x86_early_init_platform_quirks+0x146/0x1a1:
x86_early_init_platform_quirks at arch/x86/kernel/platform-quirks.c:31
[ 0.003333] ? secondary_startup_64+0xa5/0xb0:
secondary_startup_64 at arch/x86/kernel/head_64.S:237
[ 0.003333]
[ 0.003333] Memory state around the buggy address:
[ 0.003333] ffffffff83607980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 0.003333] ffffffff83607a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 0.003333] >ffffffff83607a80: f1 f1 f1 f1 f8 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2
Attached the full dmesg, kconfig and reproduce scripts.
Thanks,
Fengguang
View attachment "dmesg-vm-lkp-hsw01-yocto-x86_64-12:20171127152625:x86_64-randconfig-ws0-11261108:4.15.0-rc1:1" of type "text/plain" (24290 bytes)
View attachment ".config" of type "text/plain" (101315 bytes)
View attachment "job-script" of type "text/plain" (4046 bytes)
View attachment "reproduce-vm-lkp-hsw01-yocto-x86_64-12:20171127152625:x86_64-randconfig-ws0-11261108:4.15.0-rc1:1" of type "text/plain" (1969 bytes)
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