Machin check failed on arm64 VMs

[horsef...@gmail.com]

Hi,

Use the latest syzkaller I get machine check failure on arm64 VMs,but the same kernel code it works OK on x86 VMs,refer to the log it seems like the testing progs mmap bad address 0xffffffffffffffff,and I notice there is no code mmap(0x1ffff000,0x1000,0x0,0x32,0xfffffffffffffffff,0x0) in testing progs,any help?

Tks !

[horsef...@gmail.com]

Looks like the picture's dead,the simple log is:

#0 [1303ms] ->  mmap(0x1ffff000,0x1000,0x0,0x32,0xffffffffffffffff,0x0)

#0 [1303ms]  <- mmap=0xfffffffffffffffff errno=22 cover=119

#0 [1303ms] ->  mmap(0x20000000,0x10000000,0x7,0x32,0xffffffffffffffff,0x0)

#0 [1303ms] <- mmap=0x20000000 errno=14 cover=2313 

[Dmitry Vyukov]

On Mon, Dec 7, 2020 at 2:37 PM horsef...@gmail.com
<horsef...@gmail.com> wrote:
>
> Looks like the picture's dead,the simple log is:
> #0 [1303ms] -> mmap(0x1ffff000,0x1000,0x0,0x32,0xffffffffffffffff,0x0)
> #0 [1303ms] <- mmap=0xfffffffffffffffff errno=22 cover=119
> #0 [1303ms] -> mmap(0x20000000,0x10000000,0x7,0x32,0xffffffffffffffff,0x0)
> #0 [1303ms] <- mmap=0x20000000 errno=14 cover=2313

This looks fine, some syscalls can fail during fuzzing. This is
expected. What's failing?

> 在2020年12月7日星期一 UTC+8 下午9:29:03<horsef...@gmail.com> 写道：
>>
>> Hi,
>> Use the latest syzkaller I get machine check failure on arm64 VMs,but the same kernel code it works OK on x86 VMs,refer to the log it seems like the testing progs mmap bad address 0xffffffffffffffff,and I notice there is no code mmap(0x1ffff000,0x1000,0x0,0x32,0xfffffffffffffffff,0x0) in testing progs,any help?
>> Tks !
>>
>>
>>

> --
> You received this message because you are subscribed to the Google Groups "syzkaller" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller+...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller/35ad9cc2-634e-46ba-b3dc-caa68945809cn%40googlegroups.com.

[horsef...@gmail.com]

Hi, Dmitry Vyukov !

    I noticed maybe some syscalls failed,but I dont know how to reproduce it ,I just get lost connection to vms error on the syzkaller website.and each time the machine check failed,

syzkaller retryed and the vm reboot.Here are the failed logs.

#0 [1003ms] -> mmap(0x1ffff000, 0x1000, 0x0, 0x32, 0xffffffffffffffff, 0x0)

#0 [1003ms] <- mmap=0xffffffffffffffff errno=22 cover=117 

#0 [1004ms] -> mmap(0x20000000, 0x1000000, 0x7, 0x32, 0xffffffffffffffff, 0x0)

#0 [1004ms] <- mmap=0x20000000 errno=14 cover=1876 

#0 [1004ms] -> mmap(0x21000000, 0x1000, 0x0, 0x32, 0xffffffffffffffff, 0x0)

#0 [1004ms] <- mmap=0x21000000 errno=14 cover=983 

enabling collider

#0 [1004ms] -> mmap(0x1ffff000, 0x1000, 0x0, 0x32, 0xffffffffffffffff, 0x0)

#0 [1004ms] <- mmap=0xffffffffffffffff errno=22 cover=117 

#0 [1004ms] -> mmap(0x20000000, 0x1000000, 0x7, 0x32, 0xffffffffffffffff, 0x0)

#0 [1004ms] <- mmap=0x20000000 errno=14 cover=1864 

#1 [1004ms] -> mmap(0x21000000, 0x1000, 0x0, 0x32, 0xffffffffffffffff, 0x0)

#1 [1004ms] <- mmap=0x21000000 errno=14 cover=1029 

2020/12/17 12:00:11 machine check failed: simple call failed: {Flags:3 Signal:[134887340 3306652456 1261789753 2035864125 2388416695 3143886955 2485386515 1362538568 2209203562 3960917581 322787397 3208123723 509663020 2311835259 2973959243 3294412270 2568988069 3376735034 439523948 3705029303 1665421680 60403809 1213954973 3333108205 4139031136 2620202066 3443405325 1263453263 3745850904 2351058111 1935148951 2594362069 276033992 3888115429 3972179774 319952780 3275286533 2226975037 349870561 186598225 437086067 350027001 2854608161 825282997 337511802 3336995925 1389701903 22853178 3867154726 1721854121 437086359 3052516622 616404621 2183026430 176345266 38242275 1796586662 3988491787 3352731667 2738398630 3061737123 3887683745 2912304432 2192842822 270111409 871029962 2345469441 400501671 837640713 298325486 2289158953 1695971351 3786428060 6461809 440043692 1455035833 546951428 2391235429 1971499583 2294985965 3676924368 1064477570 2022033292 281680694 4086178898 3902537714 234924843 993510164 4222896974 3165623481 1261075346 854045890 2875899721 1117838812 1071318205 365509583 294542924 826548277 2782254202 3284038351 1614383332 1575006367 1750834046 3661690851 599380082 2824247982 2382493802 2597454167 3586110629 3998874627 3371266175 2840752945 1752337409 1997886587 214224639 3132639604] Cover:[] Comps: Errno:22}

2020/12/17 12:00:11 Manager.Check call failed: you failed

debug1: client_input_channel_req: channel 0 rtype exit-status reply 0

debug1: channel 0: free: client-session, nchannels 1

debug1: fd 0 clearing O_NONBLOCK

debug1: fd 2 clearing O_NONBLOCK

Transferred: sent 3376, received 21436 bytes, in 1.6 seconds

Bytes per second: sent 2071.1, received 13150.8

debug1: Exit status 1