[  OK  ] Started OpenBSD Secure Shell server.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts.
2021/06/04 09:57:30 fuzzer started
2021/06/04 09:57:31 dialing manager at 10.128.0.163:45369
2021/06/04 09:57:34 syscalls: 1998
2021/06/04 09:57:34 code coverage: enabled
2021/06/04 09:57:34 comparison tracing: enabled
2021/06/04 09:57:34 extra coverage: enabled
2021/06/04 09:57:34 setuid sandbox: enabled
2021/06/04 09:57:34 namespace sandbox: enabled
2021/06/04 09:57:34 Android sandbox: enabled
2021/06/04 09:57:34 fault injection: enabled
2021/06/04 09:57:34 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/06/04 09:57:34 net packet injection: /dev/net/tun does not exist
2021/06/04 09:57:34 net device setup: enabled
2021/06/04 09:57:34 concurrency sanitizer: enabled
2021/06/04 09:57:34 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/06/04 09:57:34 USB emulation: /dev/raw-gadget does not exist
2021/06/04 09:57:34 hci packet injection: /dev/vhci does not exist
2021/06/04 09:57:34 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist
2021/06/04 09:57:34 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist
2021/06/04 09:57:34 suppressing KCSAN reports in functions: 'blk_mq_sched_dispatch_requests' 'blk_mq_dispatch_rq_list' 'xas_clear_mark' 'shmem_mknod' 'n_tty_receive_buf_common' 'ext4_mark_iloc_dirty' 'ext4_free_inodes_count' 'blk_mq_rq_ctx_init' 'dd_has_work' 'exit_mm' 'step_into' 'do_sys_poll' 'expire_timers' '__io_queue_sqe' 'kauditd_thread' '__xa_clear_mark' 'generic_write_end' 
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syzkaller login: [   32.170297][    T0] ==================================================================
[   32.171832][    T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer
[   32.173104][    T0] 
[   32.173488][    T0] write to 0xffffffff83cbf110 of 4 bytes by interrupt on cpu 0:
[   32.174953][    T0]  tick_sched_timer+0x1f5/0x210
[   32.175711][    T0]  __run_hrtimer+0x160/0x480
[   32.176585][    T0]  hrtimer_interrupt+0x380/0xaf0
[   32.177330][    T0]  __sysvec_apic_timer_interrupt+0x6f/0x1c0
[   32.178187][    T0]  sysvec_apic_timer_interrupt+0x64/0x80
[   32.179003][    T0]  asm_sysvec_apic_timer_interrupt+0x12/0x20
[   32.179889][    T0]  acpi_idle_enter+0x25b/0x2e0
[   32.180771][    T0]  cpuidle_enter_state+0x2b6/0x750
[   32.181488][    T0]  cpuidle_enter+0x3c/0x60
[   32.182364][    T0]  do_idle+0x1a3/0x240
[   32.183090][    T0]  cpu_startup_entry+0x15/0x20
[   32.183825][    T0]  rest_init+0xc9/0xd0
[   32.184542][    T0]  arch_call_rest_init+0xa/0xb
[   32.185340][    T0]  start_kernel+0x59e/0x623
[   32.185999][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   32.186926][    T0] 
[   32.187293][    T0] read to 0xffffffff83cbf110 of 4 bytes by task 0 on cpu 1:
[   32.188304][    T0]  tick_nohz_next_event+0x217/0x300
[   32.189114][    T0]  tick_nohz_get_sleep_length+0x121/0x280
[   32.190016][    T0]  menu_select+0x303/0x1050
[   32.193415][    T0]  cpuidle_select+0x3d/0x50
[   32.197950][    T0]  do_idle+0x16f/0x240
[   32.202035][    T0]  cpu_startup_entry+0x15/0x20
[   32.206787][    T0]  secondary_startup_64_no_verify+0xb0/0xbb
[   32.212666][    T0] 
[   32.214963][    T0] value changed: 0xffffffff -> 0x00000000
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[   32.220648][    T0] 
[   32.222945][    T0] Reported by Kernel Concurrency Sanitizer on:
[   32.229077][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.13.0-rc4-syzkaller #0
[   32.237114][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.247160][    T0] ==================================================================
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2021/06/04 09:57:55 starting 6 fuzzer processes
09:57:55 executing program 0:
r0 = socket$inet(0x2, 0x4000000000000001, 0x0)
setsockopt$inet_tcp_int(r0, 0x6, 0x80000000000002, &(0x7f00000000c0)=0x2000000000000074, 0x25d)
bind$inet(r0, &(0x7f0000000280)={0x2, 0x4e23, @local}, 0x10)
setsockopt$SO_ATTACH_FILTER(r0, 0x1, 0x1a, &(0x7f0000000480)={0x1, &(0x7f0000000400)=[{0x6, 0x0, 0x0, 0xe5}]}, 0x10)
sendto$inet(r0, 0x0, 0x0, 0x200007fd, &(0x7f0000e68000)={0x2, 0x4e23, @local}, 0x10)
setsockopt$sock_int(r0, 0x1, 0x8, &(0x7f0000000600), 0x4)
writev(r0, &(0x7f0000000780)=[{&(0x7f0000000100)="dff548771d77ce8786aca76dda6fb054ab8ea73799d7293eda90ba41a2db81fab55b5415692300a8e64bca2f60e1717f85f06a6bbca90f392b04f34940db7ffccc33ed6ea82296de9683c9e360cd1c477304bd8f9bd74d44a4c7d1c7e625a86cd54b72c5745f475a772b84977a6b05381dbe6259bc510f0f70c3e9946a78c7b5a19e97447799d930f9", 0x89}, {&(0x7f00000001c0)="96431fb1cb119741590ad657dc5e5ce3e5fe9f1f639e6a18bc7b6c1d0b424eb306f34cf2429c62c0fdefbae36740a7169721af852826d7f14b6cae8af8", 0x3d}], 0x2)
sendmmsg$inet(r0, &(0x7f0000002e40)=[{{0x0, 0x0, &(0x7f0000000200)=[{&(0x7f00000002c0)="3f23b529049f41213edfd571fdac3c003096f4a117a999490cb70f025c4599055a980e537b87de129f351bca95f7aeefc6fd4365f5804982c0dac803be2be695e779b0ef46b0dd74d0e2f1f4278b997a091da616709a59f77be1c46bb12b29292def64f6e4ae156f94270302c721c92615a9824a19eaac1dfacf075c52882f0a7221159f8f851d0063b634bb06c8739646cf7e73c08772ed57b9ed2c3d3bf979188a018a13ba2354b27f389f477580ac6fcb8be0a3f7a3c55d3c6a39084e13afeb6e24c89dad4e8ca64ecced96193180389cfb3d6fe57635f07c36e43c416b01b03837e2298eafbae009b1d92f5fc60439dd0949c8e81d29", 0xf8}, {&(0x7f00000004c0)="25310fae7f05314dcec680a1b15185874621b721d2e2d2079e5d0f9b24414b38420f322ae7cec20fb03284401d9023d61157eee986745b4219acd885efe0fd82e36b0d2e21f3b0154b9b0ec90c8cfe5cd0ebaa56028965abb92e2d1fd21bff2b47083e5437be7a0222cf62c31adb046f5a8f69571bdc9dc068e341b5e0ace7a87e019babe2d9598092cdad05c2948dff61d83bc4dcb3ef4914210068b754fef2a1d41a48df22a325a82aeb3076ee22c5a12799d0975d3fba29704bb219847695336d14b1fb4ab783d221a82199f889526a7d9fe8be1d109961abdb7b80e123da3f55ae3aecc25c072c735c303f", 0xed}, {&(0x7f0000000640)="248128665f7c39236ccec8e77c987bdc32c6bd0251b85b28c0112f28d66c83c6503fbbf4c02976997c60d2912ad720add185ea0702b5056435e5e85c22b00a33b7e718ad17b2855d62fa0ea9719344307a18b954fc30077226ab8536b2be6e5fbe8f9f700985b8c02138e874396707e36979e9a295263f8fb0596f4f5eb1f17028f4443f84cdb31b1a", 0x89}, {&(0x7f00000007c0)="d0d2eb07cca0296eb2b3eaf13cf0c1545516c7b23e76b08a72df1cbf75131630c69d5d91bd8dbed0ab5563df90c5ff74399a46f21a2c6e9452fdc8b9964284e2ac58b38d77cc50c3fd87c2359ed785ba464187785d54363ac6a4cd029cbdcdc61c6900e6a5f2adaa5ae033af28e7c9dcdf3616dee008c84480bb40d0c7b4e54a88f95cc8c65f7ba17fea7dc43627f21d99fbd11a24a84669711d443bccb8b5f58513d7bccf9f536adf2f4d", 0xab}, {&(0x7f0000000080)="af5f3879a40d43ebb76a3f9eb042d41a5b1e4d9fe6ee70f852195e4fea6886f0a9c98a7a451e5fdade", 0x29}, {&(0x7f0000000880)="39513b0fc9aef9dbab9490ce3e1f753bd28786a1da9ac5beef4e05209bbc84682dddecbff59491a9ea337f5b1f2c0d47dc634d9f0c86", 0x36}], 0x6}}], 0x1, 0x0)

09:57:55 executing program 1:
r0 = getpid()
timer_create(0x0, &(0x7f0000000200)={0x0, 0x0, 0x4, @tid=r0}, 0x0)

09:57:55 executing program 5:
perf_event_open(&(0x7f0000000040)={0x8, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}, 0x0, 0x0, 0x0, 0x2}, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0)

09:57:55 executing program 2:
perf_event_open(&(0x7f00000000c0)={0x2, 0x80, 0xf6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={0x0}}, 0x0, 0x0, 0xffffffffffffffff, 0x0)
inotify_init1(0x0)

09:57:55 executing program 3:
prctl$PR_SET_PTRACER(0x59616d61, 0xffffffffffffffff)
clone(0x80000100, 0x0, 0xfffffffffffffffe, 0x0, 0xffffffffffffffff)
r0 = gettid()
write$sndseq(0xffffffffffffffff, &(0x7f00000000c0)=[{0x0, 0x0, 0x0, 0x0, @tick, {}, {}, @ext={0x50, &(0x7f0000000140)="c4c691019919da078a0098d1e0a593b040f7ecda71e1af90790f5ed75c092b88629100f06ee04fa4ea57ff22ea97be19af3dcba01419cd2386ad59157689c9c6a47312334c2a97ac2b7f0fb4aabebae8"}}], 0x1c)
wait4(0x0, 0x0, 0x80000000, 0x0)
vmsplice(0xffffffffffffffff, &(0x7f0000000100)=[{&(0x7f0000000040)}, {&(0x7f0000000000)="0832f497d38350418e4bb321019511dc5df26e9a0b7ecb6974f527cc14538d1efb1ffe03284f6d33265be9c604b293f20e96beeb2aa4c457ac37a3a3f1ce8682500fcecd80", 0x45}], 0x2, 0x0)
clone(0x0, &(0x7f0000000080)="498bde7ac76934b76c5c6065ffc36cffa51e9d57c265859b17de102243ad446a98c18a1083540d8950e453d9", 0x0, 0x0, 0x0)
ptrace$setopts(0x4206, r0, 0x0, 0x0)
tkill(r0, 0x17)
ptrace$setregs(0xd, r0, 0x0, &(0x7f0000000080))
r1 = gettid()
tkill(r1, 0x34)

09:57:55 executing program 4:
r0 = gettid()
r1 = socket$packet(0x11, 0x3, 0x300)
readv(r1, &(0x7f0000001640)=[{&(0x7f00000001c0)=""/246, 0xf6}], 0x1)
r2 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0)
mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800003, 0x12, r2, 0x0)
preadv(r2, &(0x7f0000000280), 0x100000000000008d, 0x4, 0x0)
tkill(r0, 0x7)

[   41.807138][   T25] audit: type=1400 audit(1622800675.412:8): avc:  denied  { execmem } for  pid=1774 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   41.856976][ T1777] cgroup: Unknown subsys name 'perf_event'
[   41.879599][ T1777] cgroup: Unknown subsys name 'net_cls'
[   41.929486][ T1781] cgroup: Unknown subsys name 'perf_event'
[   41.935561][ T1781] cgroup: Unknown subsys name 'net_cls'
[   41.952241][ T1783] cgroup: Unknown subsys name 'perf_event'
[   41.959408][ T1783] cgroup: Unknown subsys name 'net_cls'
[   41.976431][ T1787] cgroup: Unknown subsys name 'perf_event'
[   41.979442][ T1788] cgroup: Unknown subsys name 'perf_event'
[   41.989406][ T1787] cgroup: Unknown subsys name 'net_cls'
[   41.991895][ T1790] cgroup: Unknown subsys name 'perf_event'
[   42.001269][ T1788] cgroup: Unknown subsys name 'net_cls'
[   42.014338][ T1790] cgroup: Unknown subsys name 'net_cls'