Warning: Permanently added '10.128.0.204' (ECDSA) to the list of known hosts. 2021/05/08 10:49:15 fuzzer started 2021/05/08 10:49:15 dialing manager at 10.128.0.163:33953 2021/05/08 10:49:15 syscalls: 1982 2021/05/08 10:49:15 code coverage: enabled 2021/05/08 10:49:15 comparison tracing: enabled 2021/05/08 10:49:15 extra coverage: enabled 2021/05/08 10:49:15 setuid sandbox: enabled 2021/05/08 10:49:15 namespace sandbox: enabled 2021/05/08 10:49:15 Android sandbox: enabled 2021/05/08 10:49:15 fault injection: enabled 2021/05/08 10:49:15 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/08 10:49:15 net packet injection: /dev/net/tun does not exist 2021/05/08 10:49:15 net device setup: enabled 2021/05/08 10:49:15 concurrency sanitizer: enabled 2021/05/08 10:49:15 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/08 10:49:15 USB emulation: /dev/raw-gadget does not exist 2021/05/08 10:49:15 hci packet injection: /dev/vhci does not exist 2021/05/08 10:49:15 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 2021/05/08 10:49:15 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 2021/05/08 10:49:16 suppressing KCSAN reports in functions: 'xas_clear_mark' 'tick_nohz_next_event' 'generic_write_end' '__mark_inode_dirty' 'exit_mm' '__add_to_page_cache_locked' 'ext4_mb_regular_allocator' 'fast_dput' '_find_next_bit' 'blk_mq_rq_ctx_init' 'dd_has_work' 'do_readlinkat' 'tick_sched_timer' '__ext4_new_inode' 'blk_mq_dispatch_rq_list' 'blk_mq_sched_dispatch_requests' 'n_tty_receive_buf_common' 'kauditd_thread' 'do_nanosleep' 'do_signal_stop' 'ext4_free_inodes_count' '__xa_clear_mark' 'step_into' 2021/05/08 10:49:16 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/08 10:49:16 fetching corpus: 50, signal 10027/13819 (executing program) 2021/05/08 10:49:16 fetching corpus: 100, signal 16832/22328 (executing program) 2021/05/08 10:49:16 fetching corpus: 150, signal 20600/27770 (executing program) 2021/05/08 10:49:16 fetching corpus: 200, signal 28025/36617 (executing program) 2021/05/08 10:49:16 fetching corpus: 250, signal 33932/43917 (executing program) [ 20.812821][ T1759] ================================================================== [ 20.814258][ T1759] BUG: KCSAN: data-race in futex_wait_queue_me / prepare_signal [ 20.815438][ T1759] [ 20.815807][ T1759] write to 0xffff88810119f06c of 4 bytes by task 1761 on cpu 0: [ 20.816956][ T1759] futex_wait_queue_me+0x198/0x260 [ 20.817688][ T1759] futex_wait+0x143/0x430 [ 20.818365][ T1759] do_futex+0x9e8/0x1ee0 [ 20.819150][ T1759] __se_sys_futex+0x2a8/0x390 [ 20.819790][ T1759] __x64_sys_futex+0x74/0x80 [ 20.820435][ T1759] do_syscall_64+0x4a/0x90 [ 20.821035][ T1759] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 20.821858][ T1759] [ 20.822218][ T1759] read to 0xffff88810119f06c of 4 bytes by task 1759 on cpu 1: [ 20.823297][ T1759] prepare_signal+0x952/0xeb0 [ 20.823952][ T1759] __send_signal+0x64/0x760 [ 20.824651][ T1759] send_signal+0x281/0x390 [ 20.825422][ T1759] do_send_specific+0x13d/0x1c0 [ 20.826076][ T1759] __x64_sys_tgkill+0x108/0x140 [ 20.826857][ T1759] do_syscall_64+0x4a/0x90 [ 20.827676][ T1759] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 20.828655][ T1759] [ 20.829133][ T1759] Reported by Kernel Concurrency Sanitizer on: [ 20.830279][ T1759] CPU: 1 PID: 1759 Comm: syz-fuzzer Not tainted 5.12.0-syzkaller #0 [ 20.831401][ T1759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.832847][ T1759] ================================================================== 2021/05/08 10:49:16 fetching corpus: 300, signal 37711/49070 (executing program) 2021/05/08 10:49:16 fetching corpus: 349, signal 42553/55113 (executing program) 2021/05/08 10:49:16 fetching corpus: 399, signal 45704/59565 (executing program) 2021/05/08 10:49:16 fetching corpus: 449, signal 49755/64740 (executing program) 2021/05/08 10:49:16 fetching corpus: 499, signal 52714/68823 (executing 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2021/05/08 10:49:23 fetching corpus: 10626, signal 194227/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10676, signal 194543/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10726, signal 194865/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10776, signal 195143/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10826, signal 195416/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10876, signal 195596/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10902, signal 195719/196750 (executing program) 2021/05/08 10:49:23 fetching corpus: 10902, signal 195719/196750 (executing program) 2021/05/08 10:49:24 starting 6 fuzzer processes 10:49:24 executing program 0: r0 = openat$sndseq(0xffffffffffffff9c, &(0x7f0000000000), 0x0) ioctl$SNDRV_SEQ_IOCTL_SET_CLIENT_INFO(r0, 0x40bc5311, &(0x7f00000001c0)={0x80, 0x0, 'client1\x00', 0x0, "9c2e9a0d1c9179cf", "20e48560999fd123b6a5426180a8c20000000000002000"}) 10:49:24 executing program 1: r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0) mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x1800003, 0x12, r0, 0x0) preadv(r0, &(0x7f0000000280), 0x18, 0xd9f, 0x0) syz_mount_image$iso9660(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x2, &(0x7f0000000200)=[{&(0x7f0000010a00)="0243443030310100004c0049004e0055005800200020002000200020002000200020002000200020004300440052004f004d0020002000200020002000200020002000200020002000000000000000005002000000000250252f4500000000000000000000000000000000000000000000000000000000000100000101000001000808001c0000000000001c1001000000000000000001120000000022001601", 0xa0, 0x8800}, {&(0x7f0000000140)="220016010008007809140b2a3a080229786d9effd4b176e4ded0a70aa9d2fba200be17", 0x23, 0x8b000}], 0x0, &(0x7f0000000080)) 10:49:24 executing program 5: pwrite64(0xffffffffffffffff, &(0x7f0000000080)="7ba92f39a0fb3309b86c2833b89fdc8d7ee1b59520f2899c832de764a640b5433db629be4f32d77bd3d6c1ef4b87705f5ea9f7cc88951c6e676d0335df88887022fd2fe601d5", 0x46, 0x0) r0 = socket$inet_tcp(0x2, 0x1, 0x0) setsockopt$inet_tcp_int(r0, 0x6, 0x20, &(0x7f0000000040)=0x2, 0xf6) 10:49:24 executing program 2: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000180), 0x8000000002046, 0x0) r1 = dup2(r0, r0) write$P9_RMKNOD(r1, &(0x7f0000000000)={0xff06}, 0xffffff57) ioctl$TCSETS(r0, 0x40045431, &(0x7f0000000080)) r2 = syz_open_pts(r0, 0x0) ioctl$TCSETSF(r2, 0x5412, &(0x7f0000000040)={0x9}) 10:49:24 executing program 3: prctl$PR_SET_SECCOMP(0x16, 0x2, &(0x7f0000000000)={0x1, &(0x7f0000000180)=[{0x200000000006, 0x0, 0x0, 0x7ffc0001}]}) r0 = getpgrp(0x0) r1 = inotify_init1(0x0) fcntl$setown(r1, 0x8, 0xffffffffffffffff) fcntl$getownex(r1, 0x10, &(0x7f0000000100)={0x0, 0x0}) kcmp(r0, r2, 0x1, 0xffffffffffffffff, 0xffffffffffffffff) 10:49:24 executing program 4: syz_open_procfs$namespace(0x0, &(0x7f0000000040)='ns/pid_for_children\x00') [ 29.377810][ T25] audit: type=1400 audit(1620470964.934:8): avc: denied { execmem } for pid=1773 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 29.534583][ T1778] cgroup: Unknown subsys name 'perf_event' [ 29.548321][ T1778] cgroup: Unknown subsys name 'net_cls' [ 29.555749][ T1779] cgroup: Unknown subsys name 'perf_event' [ 29.566554][ T1779] cgroup: Unknown subsys name 'net_cls' [ 29.572931][ T1780] cgroup: Unknown subsys name 'perf_event' [ 29.580887][ T1780] cgroup: Unknown subsys name 'net_cls' [ 29.581541][ T1781] cgroup: Unknown subsys name 'perf_event' [ 29.592684][ T1781] cgroup: Unknown subsys name 'net_cls' [ 29.610460][ T1785] cgroup: Unknown subsys name 'perf_event' [ 29.615954][ T1791] cgroup: Unknown subsys name 'perf_event' [ 29.625425][ T1791] cgroup: Unknown subsys name 'net_cls' [ 29.628815][ T1785] cgroup: Unknown subsys name 'net_cls'