Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts.
2021/01/26 12:37:52 fuzzer started
2021/01/26 12:37:52 dialing manager at 10.128.0.105:46021
2021/01/26 12:37:53 syscalls: 3481
2021/01/26 12:37:53 code coverage: enabled
2021/01/26 12:37:53 comparison tracing: enabled
2021/01/26 12:37:53 extra coverage: enabled
2021/01/26 12:37:53 setuid sandbox: enabled
2021/01/26 12:37:53 namespace sandbox: enabled
2021/01/26 12:37:53 Android sandbox: /sys/fs/selinux/policy does not exist
2021/01/26 12:37:53 fault injection: enabled
2021/01/26 12:37:53 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/01/26 12:37:53 net packet injection: enabled
2021/01/26 12:37:53 net device setup: enabled
2021/01/26 12:37:53 concurrency sanitizer: enabled
2021/01/26 12:37:53 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/01/26 12:37:53 USB emulation: enabled
2021/01/26 12:37:53 hci packet injection: enabled
2021/01/26 12:37:53 wifi device emulation: enabled
2021/01/26 12:37:55 suppressing KCSAN reports in functions: '__ext4_new_inode' 'pcpu_alloc' 'xas_clear_mark' 'generic_write_end' 'blk_mq_dispatch_rq_list' 'do_signal_stop' 'alloc_pid' 'blk_mq_sched_dispatch_requests' 'ext4_free_inode' 'dd_has_work' 'ext4_mb_regular_allocator' 'find_get_pages_range_tag' '__xa_clear_mark' 'expire_timers' 'blk_mq_rq_ctx_init' '__add_to_page_cache_locked' 
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2021/01/26 12:38:11 starting 6 fuzzer processes
12:38:11 executing program 0:
syz_open_dev$tty1(0xc, 0x4, 0x1)
r0 = syz_io_uring_setup(0x2de5, &(0x7f0000000240), &(0x7f0000002000/0x2000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f0000000100)=<r1=>0x0, &(0x7f0000000140)=<r2=>0x0)
openat(0xffffffffffffff9c, &(0x7f0000002040)='./file0/file0\x00', 0x0, 0x183)
syz_io_uring_submit(r1, r2, &(0x7f00000001c0)=@IORING_OP_WRITEV={0x2, 0x0, 0x0, @fd_index=0x3, 0x0, 0x0}, 0x0)
io_uring_enter(r0, 0x302, 0x8000, 0x1, 0x0, 0x0)

12:38:11 executing program 1:
mkdir(&(0x7f0000000080)='./file0\x00', 0x0)
socketpair$unix(0x1, 0x5, 0x0, &(0x7f00000002c0)={<r0=>0xffffffffffffffff})
r1 = dup(r0)
ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200)
mount(&(0x7f0000000040)=ANY=[@ANYBLOB="2f2f66696a40d030327395b83d3d2f"], &(0x7f00000000c0)='./file0\x00', &(0x7f0000000180)='cifs\x00', 0x0, &(0x7f0000000100)='\x00\xf0\x97\xdd\xa4\xbf\x80\xfb,o\xdf\xdb)@\xa3\xf2\xba/\xc9\x84}\xb8vF\xd4\xd2\xbd\x00\x8e\x8d\xc8m\xa7\xc3\xcd\xa3k\xf8\x00c\xb9\x14%\xfdj\x91w\x93\xc2\x85\x84\xe6\x1f\x94\x05I\xb3\xee\xee\x00\x00\x00\x00\x00\x00\x00\x00\x00')

12:38:12 executing program 2:
ioctl$BLKALIGNOFF(0xffffffffffffffff, 0x127a, 0x0)
perf_event_open(&(0x7f00000002c0)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c43, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x1)
r0 = bpf$PROG_LOAD(0x5, &(0x7f0000000200)={0xc, 0xe, &(0x7f0000000480)=ANY=[@ANYBLOB="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"], &(0x7f0000000340)='GPL\x00'}, 0x48)
bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000400)={r0, 0x0, 0x10, 0xffffffff, &(0x7f0000000140)="a673f3ce05f1a282eeab0500000305008110e63238f9cf8c0ccade00556e97d003cc298613f230d6841f3099e19fd903b2ffa5106c71ac91c7457b2d7f4157f069737d63ab32be2a651d7cee2970a9df488cae6702031c92a8b4b6376f9972f3848c104d413745d4c57253b2d61d64787c4de49fc5", 0x0, 0x3a8, 0x0, 0x4a, 0xffffffffffffffbc, &(0x7f0000000040)="15396af9a72e96da8129ed1653da4c7f58430968e943c7415c1135cc832d158cfe31f78128c0f6ced392de7b250aa16a0837c05297e7c9d3db2466761815aeb216c263f7010b0d4de72c5f199f0be260a48e8c37d2ea3a52026012d3"}, 0x28)

12:38:12 executing program 3:
perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x41c1, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0)
r0 = syz_io_uring_setup(0x1498, &(0x7f0000000080), &(0x7f0000ffd000/0x1000)=nil, &(0x7f00006d4000/0x4000)=nil, &(0x7f0000000100)=<r1=>0x0, &(0x7f0000000040)=<r2=>0x0)
syz_memcpy_off$IO_URING_METADATA_GENERIC(r1, 0x40, &(0x7f0000000140)=0x307e, 0x0, 0x4)
socket$inet_tcp(0x2, 0x1, 0x0)
socket$inet_udplite(0x2, 0x2, 0x88)
syz_io_uring_submit(r1, r2, &(0x7f0000000200)=@IORING_OP_WRITE_FIXED={0x5, 0x2, 0x6000, @fd_index, 0x0, 0x0, 0x0, 0x4}, 0x0)
io_uring_enter(r0, 0x450c, 0x0, 0x0, 0x0, 0x0)

12:38:12 executing program 4:
r0 = socket(0x10, 0x3, 0x0)
r1 = socket$netlink(0x10, 0x3, 0x0)
r2 = socket$netlink(0x10, 0x3, 0x0)
r3 = socket$netlink(0x10, 0x3, 0x0)
r4 = socket(0x10, 0x803, 0x0)
sendmsg$NBD_CMD_DISCONNECT(r4, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={0x0}}, 0x0)
getsockname$packet(r4, &(0x7f0000000100)={0x11, 0x0, <r5=>0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14)
sendmsg$nl_route(r3, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000000)={&(0x7f00000008c0)=ANY=[@ANYBLOB="48000000100005072a369fb10000000005000000", @ANYRES32=r5, @ANYBLOB="0000000000000000280012000c00010076657468"], 0x48}}, 0x0)
sendmsg$nl_route_sched(r2, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000340)=ANY=[@ANYBLOB="3c00000024001d0f00"/20, @ANYRES32=r5, @ANYBLOB="00000000f1ffffff000000000b00010064736d61726b00000c0002000600010008"], 0x3c}}, 0x0)
sendmsg$nl_route_sched(r1, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000780)={&(0x7f00000000c0)=@newqdisc={0x3c, 0x24, 0xf1d, 0x0, 0x0, {0x0, 0x0, 0x0, r5, {}, {0x0, 0xffff}}, [@qdisc_kind_options=@q_plug={{0x9, 0x1, 'plug\x00'}, {0xc}}]}, 0x3c}}, 0x0)
sendmsg$nl_route_sched(r0, &(0x7f0000000080)={0x0, 0x0, &(0x7f0000001c40)={&(0x7f0000000380)=@newqdisc={0x24, 0x11, 0x1, 0x0, 0x0, {0x0, 0x0, 0x0, r5}}, 0x24}}, 0x0)

12:38:12 executing program 5:
r0 = socket$inet6(0xa, 0x401000000001, 0x0)
creat(&(0x7f0000000100)='./bus\x00', 0x3)
write$P9_RLERRORu(0xffffffffffffffff, 0x0, 0x0)
close(r0)
r1 = open(&(0x7f0000000400)='./bus\x00', 0x1145042, 0x0)
r2 = creat(&(0x7f0000000040)='./bus\x00', 0x0)
ftruncate(r2, 0x208202)
perf_event_open(&(0x7f0000000100)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3c43, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0)
sendfile(r0, r1, 0x0, 0x8000fffffffa)

syzkaller login: [   50.252199][ T8419] ==================================================================
[   50.260905][ T8419] BUG: KCSAN: data-race in __send_signal / page_cache_ra_unbounded
[   50.268811][ T8419] 
[   50.271115][ T8419] write to 0xffff888100f7402c of 4 bytes by task 8418 on cpu 0:
[   50.278722][ T8419]  page_cache_ra_unbounded+0x484/0x4c0
[   50.284175][ T8419]  do_page_cache_ra+0xa7/0xc0
[   50.289343][ T8419]  do_sync_mmap_readahead+0x32a/0x360
[   50.294976][ T8419]  filemap_fault+0x1ba/0xbf0
[   50.299548][ T8419]  ext4_filemap_fault+0x4b/0x60
[   50.304392][ T8419]  do_shared_fault+0xc3/0x7a0
[   50.309090][ T8419]  handle_mm_fault+0x1285/0x17b0
[   50.314011][ T8419]  do_user_addr_fault+0x433/0x830
[   50.319231][ T8419]  exc_page_fault+0x94/0x2a0
[   50.324067][ T8419]  asm_exc_page_fault+0x1e/0x30
[   50.328905][ T8419] 
[   50.331220][ T8419] read to 0xffff888100f7402c of 4 bytes by task 8419 on cpu 1:
[   50.339045][ T8419]  __send_signal+0x276/0x780
[   50.343795][ T8419]  send_signal+0x39f/0x3d0
[   50.348194][ T8419]  do_send_sig_info+0x9b/0xe0
[   50.352868][ T8419]  do_send_specific+0xc7/0x100
[   50.357618][ T8419]  __x64_sys_tgkill+0x108/0x140
[   50.362454][ T8419]  do_syscall_64+0x39/0x80
[   50.366862][ T8419]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   50.372776][ T8419] 
[   50.375075][ T8419] Reported by Kernel Concurrency Sanitizer on:
[   50.381196][ T8419] CPU: 1 PID: 8419 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0
[   50.389512][ T8419] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.399974][ T8419] ==================================================================
[   50.408028][ T8419] Kernel panic - not syncing: panic_on_warn set ...
[   50.414605][ T8419] CPU: 1 PID: 8419 Comm: syz-fuzzer Not tainted 5.11.0-rc5-syzkaller #0
[   50.422927][ T8419] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.432979][ T8419] Call Trace:
[   50.436260][ T8419]  dump_stack+0x116/0x15d
[   50.440682][ T8419]  panic+0x1e7/0x5fa
[   50.444574][ T8419]  ? vprintk_emit+0x2e2/0x360
[   50.449334][ T8419]  kcsan_report+0x67b/0x680
[   50.453828][ T8419]  ? kcsan_setup_watchpoint+0x47b/0x4e0
[   50.459393][ T8419]  ? __send_signal+0x276/0x780
[   50.464137][ T8419]  ? send_signal+0x39f/0x3d0
[   50.468836][ T8419]  ? do_send_sig_info+0x9b/0xe0
[   50.473778][ T8419]  ? do_send_specific+0xc7/0x100
[   50.478691][ T8419]  ? __x64_sys_tgkill+0x108/0x140
[   50.483709][ T8419]  ? do_syscall_64+0x39/0x80
[   50.488292][ T8419]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   50.494363][ T8419]  kcsan_setup_watchpoint+0x47b/0x4e0
[   50.499745][ T8419]  __send_signal+0x276/0x780
[   50.504324][ T8419]  send_signal+0x39f/0x3d0
[   50.508733][ T8419]  do_send_sig_info+0x9b/0xe0
[   50.513433][ T8419]  do_send_specific+0xc7/0x100
[   50.518216][ T8419]  __x64_sys_tgkill+0x108/0x140
[   50.523142][ T8419]  do_syscall_64+0x39/0x80
[   50.527631][ T8419]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   50.533870][ T8419] RIP: 0033:0x466066
[   50.537741][ T8419] Code: cc cc cc cc b8 27 00 00 00 0f 05 48 89 44 24 08 c3 cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 48 8b 54 24 18 b8 ea 00 00 00 0f 05 <c3> cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 48 8b 54
[   50.557329][ T8419] RSP: 002b:000000c00003dea0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea
[   50.565736][ T8419] RAX: ffffffffffffffda RBX: 000000c006430600 RCX: 0000000000466066
[   50.574316][ T8419] RDX: 0000000000000017 RSI: 00000000000020e2 RDI: 00000000000020e2
[   50.582272][ T8419] RBP: 000000c00003dec0 R08: 000000000001423f R09: 0000000000000010
[   50.590232][ T8419] R10: 00007ffcfd3b30b8 R11: 0000000000000246 R12: 0000000000438920
[   50.598213][ T8419] R13: 0000000000eeffe0 R14: 0000000000000000 R15: 0000000000000000
[   51.648495][ T8419] Shutting down cpus with NMI
[   51.653979][ T8419] Kernel Offset: disabled
[   51.658307][ T8419] Rebooting in 86400 seconds..