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Message-ID: <000000000000865c0305e7c7ceca@google.com>
Date: Sat, 03 Sep 2022 08:50:32 -0700
From: syzbot <syzbot+fd5aff28563665022354@...kaller.appspotmail.com>
To: benjamin.tissoires@...hat.com, jikos@...nel.org,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: [syzbot] UBSAN: shift-out-of-bounds in snto32 (2)
Hello,
syzbot found the following issue on:
HEAD commit: 42e66b1cc3a0 Merge tag 'net-6.0-rc4' of git://git.kernel.o..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=152c8193080000
kernel config: https://syzkaller.appspot.com/x/.config?x=892a57667b7af6cf
dashboard link: https://syzkaller.appspot.com/bug?extid=fd5aff28563665022354
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fc7cb3080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14317dfb080000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a81bd8175bdf/disk-42e66b1c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/14bd34a48421/vmlinux-42e66b1c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fd5aff28563665022354@...kaller.appspotmail.com
microsoft 0003:045E:07DA.0001: hid_field_extract() called with n (128) > 32! (swapper/1)
================================================================================
UBSAN: shift-out-of-bounds in drivers/hid/hid-core.c:1323:20
shift exponent 127 is too large for 32-bit type 'int'
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.0.0-rc3-syzkaller-00107-g42e66b1cc3a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
ubsan_epilogue+0xb/0x50 lib/ubsan.c:151
__ubsan_handle_shift_out_of_bounds.cold+0xb1/0x187 lib/ubsan.c:322
snto32 drivers/hid/hid-core.c:1323 [inline]
snto32.cold+0x19/0x48 drivers/hid/hid-core.c:1313
hid_input_fetch_field drivers/hid/hid-core.c:1572 [inline]
hid_process_report drivers/hid/hid-core.c:1665 [inline]
hid_report_raw_event+0x88b/0x1280 drivers/hid/hid-core.c:1998
hid_input_report+0x360/0x4c0 drivers/hid/hid-core.c:2065
hid_irq_in+0x50e/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1671
usb_hcd_giveback_urb+0x380/0x430 drivers/usb/core/hcd.c:1754
dummy_timer+0x11ff/0x32c0 drivers/usb/gadget/udc/dummy_hcd.c:1988
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:113
Code: f7 84 db 74 06 5b e9 d0 7d f9 f7 e8 cb 7d f9 f7 e8 f6 f4 ff f7 eb 0c e8 bf 7d f9 f7 0f 00 2d 68 33 d2 00 e8 b3 7d f9 f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 7e 7a f9 f7 48 85 db
RSP: 0018:ffffc90000177d20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888011a89d80 RSI: ffffffff89828c7d RDI: 0000000000000000
RBP: ffff888017821064 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888017821000 R15: ffff8881462ec804
acpi_idle_do_entry drivers/acpi/processor_idle.c:555 [inline]
acpi_idle_enter+0x524/0x6a0 drivers/acpi/processor_idle.c:692
cpuidle_enter_state+0x1ab/0xd30 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3e8/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:262
secondary_startup_64_no_verify+0xce/0xdb
</TASK>
================================================================================
----------------
Code disassembly (best guess):
0: f7 84 db 74 06 5b e9 testl $0xf7f97dd0,-0x16a4f98c(%rbx,%rbx,8)
7: d0 7d f9 f7
b: e8 cb 7d f9 f7 callq 0xf7f97ddb
10: e8 f6 f4 ff f7 callq 0xf7fff50b
15: eb 0c jmp 0x23
17: e8 bf 7d f9 f7 callq 0xf7f97ddb
1c: 0f 00 2d 68 33 d2 00 verw 0xd23368(%rip) # 0xd2338b
23: e8 b3 7d f9 f7 callq 0xf7f97ddb
28: fb sti
29: f4 hlt
* 2a: 9c pushfq <-- trapping instruction
2b: 5b pop %rbx
2c: 81 e3 00 02 00 00 and $0x200,%ebx
32: fa cli
33: 31 ff xor %edi,%edi
35: 48 89 de mov %rbx,%rsi
38: e8 7e 7a f9 f7 callq 0xf7f97abb
3d: 48 85 db test %rbx,%rbx
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
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