upstream boot error: KASAN: slab-out-of-bounds Write in hpet_alloc

From: syzbot
Date: Thu Jan 30 2020 - 05:07:16 EST

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Hello,

syzbot found the following crash on:

HEAD commit: 39bed42d Merge tag 'for-linus-hmm' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1569d9a5e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2646535f8818ae25
dashboard link: https://syzkaller.appspot.com/bug?extid=2b149e3a2468e54d2178
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+2b149e3a2468e54d2178@xxxxxxxxxxxxxxxxxxxxxxxxx

pci 0000:00:1f.3: reg 0x20: [io 0x0700-0x073f]
ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [LNKE] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKF] (IRQs 5 *10 11)
ACPI: PCI Interrupt Link [LNKG] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [LNKH] (IRQs 5 10 *11)
ACPI: PCI Interrupt Link [GSIA] (IRQs *16)
ACPI: PCI Interrupt Link [GSIB] (IRQs *17)
ACPI: PCI Interrupt Link [GSIC] (IRQs *18)
ACPI: PCI Interrupt Link [GSID] (IRQs *19)
ACPI: PCI Interrupt Link [GSIE] (IRQs *20)
ACPI: PCI Interrupt Link [GSIF] (IRQs *21)
ACPI: PCI Interrupt Link [GSIG] (IRQs *22)
ACPI: PCI Interrupt Link [GSIH] (IRQs *23)
iommu: Default domain type: Translated
pci 0000:00:01.0: vgaarb: setting as boot VGA device
pci 0000:00:01.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
pci 0000:00:01.0: vgaarb: bridge control possible
vgaarb: loaded
SCSI subsystem initialized
ACPI: bus type USB registered
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
mc: Linux media interface: v0.10
videodev: Linux video capture interface: v2.00
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@xxxxxxxx>
PTP clock support registered
EDAC MC: Ver: 3.0.0
Advanced Linux Sound Architecture Driver Initialized.
PCI: Using ACPI for IRQ routing
Bluetooth: Core ver 2.22
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
NET: Registered protocol family 8
NET: Registered protocol family 20
NetLabel: Initializing
NetLabel: domain hash size = 128
NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
NetLabel: unlabeled traffic allowed by default
nfc: nfc_init: NFC Core ver 0.1
NET: Registered protocol family 39
==================================================================
BUG: KASAN: slab-out-of-bounds in hpet_alloc+0x442/0x490 drivers/char/hpet.c:871
Write of size 4 at addr ffff88807882e5d8 by task swapper/0/1

CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_store4_noabort+0x17/0x20 mm/kasan/generic_report.c:139
hpet_alloc+0x442/0x490 drivers/char/hpet.c:871
hpet_reserve_platform_timers+0x1fc/0x245 arch/x86/kernel/hpet.c:222
hpet_late_init+0x2f4/0x38b arch/x86/kernel/hpet.c:954
do_one_initcall+0x120/0x820 init/main.c:939
do_initcall_level init/main.c:1007 [inline]
do_initcalls init/main.c:1015 [inline]
do_basic_setup init/main.c:1032 [inline]
kernel_init_freeable+0x4ca/0x570 init/main.c:1203
kernel_init+0x12/0x1bf init/main.c:1110
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 1:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527
__do_kmalloc mm/slab.c:3656 [inline]
__kmalloc+0x163/0x770 mm/slab.c:3665
kmalloc include/linux/slab.h:561 [inline]
kzalloc include/linux/slab.h:670 [inline]
hpet_alloc+0x12b/0x490 drivers/char/hpet.c:858
hpet_reserve_platform_timers+0x1fc/0x245 arch/x86/kernel/hpet.c:222
hpet_late_init+0x2f4/0x38b arch/x86/kernel/hpet.c:954
do_one_initcall+0x120/0x820 init/main.c:939
do_initcall_level init/main.c:1007 [inline]
do_initcalls init/main.c:1015 [inline]
do_basic_setup init/main.c:1032 [inline]
kernel_init_freeable+0x4ca/0x570 init/main.c:1203
kernel_init+0x12/0x1bf init/main.c:1110
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88807882e400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 472 bytes inside of
512-byte region [ffff88807882e400, ffff88807882e600)
The buggy address belongs to the page:
page:ffffea0001e20b80 refcount:1 mapcount:0 mapping:ffff88802cc00a80 index:0xffff88807882ec00
raw: 04fffe0000000200 ffff88807a800738 ffff88807a800738 ffff88802cc00a80
raw: ffff88807882ec00 ffff88807882e000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff88807882e480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88807882e500: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
>ffff88807882e580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88807882e600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807882e680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

---
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Next message: David Miller: "[GIT] IDE"
Previous message: Johan Hovold: "Re: [PATCH 7/8] usb, cdc-acm: optimize barrier usage for Rmw atomic bitops"
Next in thread: Greg KH: "Re: upstream boot error: KASAN: slab-out-of-bounds Write in hpet_alloc"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]