Warning: Permanently added '10.128.0.114' (ECDSA) to the list of known hosts. 2021/05/01 09:48:39 fuzzer started 2021/05/01 09:48:39 dialing manager at 10.128.0.163:37523 2021/05/01 09:48:39 syscalls: 1982 2021/05/01 09:48:39 code coverage: enabled 2021/05/01 09:48:39 comparison tracing: enabled 2021/05/01 09:48:39 extra coverage: enabled 2021/05/01 09:48:39 setuid sandbox: enabled 2021/05/01 09:48:39 namespace sandbox: enabled 2021/05/01 09:48:39 Android sandbox: enabled 2021/05/01 09:48:39 fault injection: enabled 2021/05/01 09:48:39 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/01 09:48:39 net packet injection: /dev/net/tun does not exist 2021/05/01 09:48:39 net device setup: enabled 2021/05/01 09:48:39 concurrency sanitizer: enabled 2021/05/01 09:48:39 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/01 09:48:39 USB emulation: /dev/raw-gadget does not exist 2021/05/01 09:48:39 hci packet injection: /dev/vhci does not exist 2021/05/01 09:48:39 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 2021/05/01 09:48:39 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 2021/05/01 09:48:40 suppressing KCSAN reports in functions: 'do_signal_stop' 'kauditd_thread' 'dd_has_work' 'ext4_ext_handle_unwritten_extents' 'do_nanosleep' 'do_readlinkat' '__process_echoes' '__find_get_block' 'ext4_ext_insert_extent' 'generic_write_end' 'alloc_pid' 'ext4_free_inodes_count' '__mark_inode_dirty' 'blk_mq_dispatch_rq_list' 'ext4_free_inode' '__ext4_new_inode' 'n_tty_receive_buf_common' 'blk_mq_sched_dispatch_requests' 'blk_mq_rq_ctx_init' 'ext4_writepages' '__xa_clear_mark' 2021/05/01 09:48:40 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/01 09:48:40 fetching corpus: 50, signal 18318/21979 (executing program) 2021/05/01 09:48:40 fetching corpus: 100, signal 23717/29041 (executing program) 2021/05/01 09:48:40 fetching corpus: 150, signal 29046/35941 (executing program) 2021/05/01 09:48:40 fetching 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(executing program) 2021/05/01 09:48:41 fetching corpus: 1448, signal 88317/122839 (executing program) 2021/05/01 09:48:41 fetching corpus: 1498, signal 89609/124906 (executing program) 2021/05/01 09:48:41 fetching corpus: 1548, signal 91558/127368 (executing program) 2021/05/01 09:48:41 fetching corpus: 1598, signal 92711/129303 (executing program) 2021/05/01 09:48:41 fetching corpus: 1648, signal 94113/131350 (executing program) 2021/05/01 09:48:41 fetching corpus: 1698, signal 96064/133764 (executing program) 2021/05/01 09:48:41 fetching corpus: 1748, signal 96952/135365 (executing program) syzkaller login: [ 18.952066][ T1745] ================================================================== [ 18.953468][ T1745] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me [ 18.954532][ T1745] [ 18.954857][ T1745] write to 0xffff888103fe002c of 4 bytes by task 1751 on cpu 1: [ 18.955936][ T1745] futex_wait_queue_me+0x198/0x260 [ 18.956640][ T1745] futex_wait+0x143/0x430 [ 18.957249][ T1745] do_futex+0x9e8/0x1ee0 [ 18.957848][ T1745] __se_sys_futex+0x2a8/0x390 [ 18.958524][ T1745] __x64_sys_futex+0x74/0x80 [ 18.959166][ T1745] do_syscall_64+0x4a/0x90 [ 18.959778][ T1745] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 18.960610][ T1745] [ 18.960936][ T1745] read to 0xffff888103fe002c of 4 bytes by task 1745 on cpu 0: [ 18.961958][ T1745] complete_signal+0x7c/0x600 [ 18.962613][ T1745] __send_signal+0x680/0x760 [ 18.963399][ T1745] send_signal+0x281/0x390 [ 18.964017][ T1745] do_send_specific+0x13d/0x1c0 [ 18.964898][ T1745] __x64_sys_tgkill+0x108/0x140 [ 18.965557][ T1745] do_syscall_64+0x4a/0x90 [ 18.966191][ T1745] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 18.967060][ T1745] [ 18.967388][ T1745] Reported by Kernel Concurrency Sanitizer on: [ 18.968240][ T1745] CPU: 0 PID: 1745 Comm: syz-fuzzer Not tainted 5.12.0-syzkaller #0 [ 18.969384][ T1745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.970749][ T1745] 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openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0) mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800007, 0x12, r1, 0x0) preadv(r1, &(0x7f0000000280), 0x18, 0xd9f, 0x0) ptrace$cont(0x20, r0, 0x0, 0x0) 09:48:50 executing program 1: syz_open_procfs(0xffffffffffffffff, &(0x7f0000000180)='numa_maps\x00') r0 = syz_open_procfs(0x0, &(0x7f0000000080)='fd\x00') r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0) mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800003, 0x12, r1, 0x0) fchdir(r0) r2 = openat(0xffffffffffffffff, &(0x7f0000000140)='/proc/self/exe\x00', 0x0, 0x0) preadv(r2, &(0x7f0000000280), 0x18, 0xd9f, 0x0) r3 = memfd_create(&(0x7f0000000340)='\x00\xc2\xea\x99\xbb\x1c\xf8jw\x97\x05\xa3\xa2\'\xdd\xe4q\xbf\t\x8c\xe0\x19\xe5\xbcJ6\xfc\xa8\xcdj\xc1F\x02\x93\xca`\x8e\x00\x00\x00\x00\x00\x00\x00\x00\x00\b \xff\x13\x96\xe3?\xdfH\x8c\xe4V\xe2\xfe\v8\x04\xa5\xb9\xc4:\xf3\xf6y_w\xd8\xcf\x90k\x05\x00\xf9\x1e\xe8m\xec\x12\xa015\xc2\xb3u|K\x111\xd4\f8\xeb\x18\xad\xbb!1\x85\x96P\x1b\xa1\x9a\x81\xf8\xb1\xecB)\xe5\xaa7\xfe\xdd,_D\xe5|\xb1j^\xaec}\x1a\xb4\x17\xafP\x85I\xd5\xa0I\xb0\xaf\xb5\x8b\\\x05\xd7g\xcbV\x8e\xd0\xac\x87I7\xbd\xc6\x9bI\x92\xb2\x87.\xb3\x1fs\xe7%\xdd+\r\xb4\x117\xa7ei~\xb8\x16\xd1P\xf2\x84\x89K\x16\xd0F|\xa3\x89\xc9~9\x00\x00\x00\x00\x00\x00\x00', 0x0) write(r3, &(0x7f00000000c0)="6963e64243ea486da3a74e3deec6fc5bb9650b5de56946c568f95d22467190ba406d59a5958d6f156c9c8a2ac4677b00000000000000000000200000f8bf54da33", 0x41) mmap(&(0x7f0000000000/0x2000)=nil, 0x2000, 0x1, 0x11, r3, 0x0) r4 = inotify_init1(0x0) r5 = inotify_init1(0x0) inotify_add_watch(r5, &(0x7f0000000040)='./file0\x00', 0xc40001e1) inotify_add_watch(r4, &(0x7f0000000040)='./file0\x00', 0xc40001e1) creat(&(0x7f0000000040)='./file0\x00', 0x0) 09:48:50 executing program 5: r0 = socket$inet6_udp(0xa, 0x2, 0x0) connect(r0, &(0x7f0000001380)=@l2tp={0x2, 0x0, @multicast1}, 0x80) 09:48:50 executing program 2: lsetxattr$system_posix_acl(&(0x7f0000000000)='./cgroup\x00', &(0x7f0000000040)='system.posix_acl_access\x00', &(0x7f0000000080), 0x4, 0x0) 09:48:50 executing program 3: openat$cgroup_ro(0xffffffffffffff9c, &(0x7f00000000c0)='memory.events\x00', 0x26e1, 0x0) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000240)='cgroup.controllers\x00', 0x26e1, 0x0) r0 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000080)='cgroup.controllers\x00', 0x7a05, 0x1700) write$cgroup_int(r0, &(0x7f0000000200), 0x43400) r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000100)='memory.events\x00', 0x100002, 0x0) write$cgroup_subtree(r1, &(0x7f0000000300)=ANY=[], 0x32600) ioctl$PERF_EVENT_IOC_PERIOD(r1, 0xc028660f, &(0x7f00000005c0)=0x400000000) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000140)='memory.events\x00', 0x7a05, 0x1700) write$binfmt_script(0xffffffffffffffff, 0x0, 0x36) write$cgroup_int(r1, &(0x7f0000000040), 0x43) r2 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000180)='cgroup.controllers\x00', 0x100002, 0x0) openat$cgroup_ro(0xffffffffffffffff, 0x0, 0x0, 0x0) perf_event_open(&(0x7f0000000180)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x203}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) ioctl$F2FS_IOC_GET_COMPRESS_BLOCKS(0xffffffffffffffff, 0x8008f511, 0x0) ioctl$PERF_EVENT_IOC_PERIOD(r2, 0xc028660f, &(0x7f00000005c0)=0x3fffffffe) 09:48:50 executing program 4: r0 = syz_open_dev$tty1(0xc, 0x4, 0x1) ioctl$KDFONTOP_SET(r0, 0x4b72, &(0x7f0000000440)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0}) [ 27.322455][ T25] audit: type=1400 audit(1619862530.053:8): avc: denied { execmem } for pid=1760 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 27.406187][ T1765] cgroup: Unknown subsys name 'perf_event' [ 27.430573][ T1765] cgroup: Unknown subsys name 'net_cls' [ 27.461859][ T1767] cgroup: Unknown subsys name 'perf_event' [ 27.481195][ T1767] cgroup: Unknown subsys name 'net_cls' [ 27.498713][ T1768] cgroup: Unknown subsys name 'perf_event' [ 27.519190][ T1768] cgroup: Unknown subsys name 'net_cls' [ 27.523818][ T1770] cgroup: Unknown subsys name 'perf_event' [ 27.532799][ T1771] cgroup: Unknown subsys name 'perf_event' [ 27.534543][ T1772] cgroup: Unknown subsys name 'perf_event' [ 27.539635][ T1770] cgroup: Unknown subsys name 'net_cls' [ 27.550971][ T1772] cgroup: Unknown subsys name 'net_cls' [ 27.558260][ T1771] cgroup: Unknown subsys name 'net_cls'