Warning: Permanently added '10.128.0.95' (ECDSA) to the list of known hosts. 2021/05/15 10:18:01 fuzzer started 2021/05/15 10:18:01 dialing manager at 10.128.0.163:44161 2021/05/15 10:18:01 syscalls: 1997 2021/05/15 10:18:01 code coverage: enabled 2021/05/15 10:18:01 comparison tracing: enabled 2021/05/15 10:18:01 extra coverage: enabled 2021/05/15 10:18:01 setuid sandbox: enabled 2021/05/15 10:18:01 namespace sandbox: enabled 2021/05/15 10:18:01 Android sandbox: enabled 2021/05/15 10:18:01 fault injection: enabled 2021/05/15 10:18:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/15 10:18:01 net packet injection: /dev/net/tun does not exist 2021/05/15 10:18:01 net device setup: enabled 2021/05/15 10:18:01 concurrency sanitizer: enabled 2021/05/15 10:18:01 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/15 10:18:01 USB emulation: /dev/raw-gadget does not exist 2021/05/15 10:18:01 hci packet injection: /dev/vhci does not exist 2021/05/15 10:18:01 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 2021/05/15 10:18:01 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 2021/05/15 10:18:02 suppressing KCSAN reports in functions: 'exit_mm' 'shmem_symlink' 'kauditd_thread' '__io_queue_sqe' 'blk_mq_sched_dispatch_requests' 'alloc_pid' 'xas_find_marked' '_find_next_bit' 'filemap_read' 'do_readlinkat' 'exit_signals' '__xa_clear_mark' 'blk_mq_rq_ctx_init' '__ext4_new_inode' '__process_echoes' 'kcompactd' 'audit_log_start' 'n_tty_receive_buf_common' 'generic_write_end' '__mark_inode_dirty' 'ext4_writepages' 'lookup_fast' 'blk_mq_dispatch_rq_list' 'shmem_mknod' 'fast_dput' 'step_into' 'ext4_free_inodes_count' 2021/05/15 10:18:02 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/15 10:18:02 fetching corpus: 49, signal 10064/13896 (executing program) 2021/05/15 10:18:02 fetching corpus: 97, signal 19316/24811 (executing program) 2021/05/15 10:18:02 fetching corpus: 147, signal 28120/35109 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signal 149811/211712 (executing program) 2021/05/15 10:18:06 fetching corpus: 4993, signal 150209/212322 (executing program) 2021/05/15 10:18:06 fetching corpus: 5043, signal 150835/212977 (executing program) 2021/05/15 10:18:06 fetching corpus: 5093, signal 151357/213653 (executing program) [ 23.475854][ T1742] ================================================================== [ 23.477859][ T1742] BUG: KCSAN: data-race in futex_wait_queue_me / prepare_signal [ 23.479457][ T1742] [ 23.480156][ T1742] write to 0xffff8881047a40ac of 4 bytes by task 1744 on cpu 0: [ 23.481945][ T1742] futex_wait_queue_me+0x198/0x260 [ 23.482926][ T1742] futex_wait+0x143/0x430 [ 23.483769][ T1742] do_futex+0x9d8/0x1ee0 [ 23.484852][ T1742] __se_sys_futex+0x21c/0x380 [ 23.485875][ T1742] __x64_sys_futex+0x74/0x80 [ 23.487029][ T1742] do_syscall_64+0x4a/0x90 [ 23.488192][ T1742] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 23.489437][ T1742] [ 23.490168][ T1742] read to 0xffff8881047a40ac of 4 bytes by task 1742 on cpu 1: [ 23.491395][ T1742] prepare_signal+0x952/0xeb0 [ 23.492123][ T1742] __send_signal+0x64/0x760 [ 23.492918][ T1742] send_signal+0x281/0x390 [ 23.493841][ T1742] do_send_specific+0x13d/0x1c0 [ 23.494772][ T1742] __x64_sys_tgkill+0x108/0x140 [ 23.495671][ T1742] do_syscall_64+0x4a/0x90 [ 23.497654][ T1742] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 23.503650][ T1742] [ 23.505955][ T1742] Reported by Kernel Concurrency Sanitizer on: [ 23.512078][ T1742] CPU: 1 PID: 1742 Comm: syz-fuzzer Not tainted 5.13.0-rc1-syzkaller #0 2021/05/15 10:18:06 fetching corpus: 5143, signal 151938/214305 (executing program) [ 23.520632][ T1742] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.530847][ T1742] ================================================================== 2021/05/15 10:18:06 fetching corpus: 5193, signal 152800/214910 (executing program) 2021/05/15 10:18:07 fetching corpus: 5243, signal 153262/215480 (executing program) 2021/05/15 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openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0) preadv(r1, &(0x7f0000000280), 0x18, 0xd9f, 0x0) r2 = creat(&(0x7f00000002c0)='./file0\x00', 0x0) fsetxattr$system_posix_acl(r2, &(0x7f0000000300)='system.posix_acl_access\x00', &(0x7f0000000100)=ANY=[@ANYBLOB="02000000010000000000000002000000", @ANYRES32=0x0, @ANYBLOB="040000000000000008000000", @ANYRES32=0x0, @ANYBLOB='\b\x00\x00\x00', @ANYRES32=0x0, @ANYBLOB='\b\x00\x00\x00', @ANYRES32=0x0, @ANYBLOB='\b\x00\x00\x00', @ANYRES32=0x0, @ANYBLOB='\b\x00\x00\x00', @ANYRES32=0x0, @ANYBLOB='\b\x00\x00\x00', @ANYRES32=0x0, @ANYBLOB="100000000000000020"], 0x5c, 0x0) fgetxattr(r2, &(0x7f0000000480)=@known='system.posix_acl_access\x00', &(0x7f00000004c0)=""/93, 0x5d) 10:18:15 executing program 1: r0 = fsopen(&(0x7f0000000040)='binfmt_misc\x00', 0x0) fsconfig$FSCONFIG_SET_FLAG(r0, 0x0, &(0x7f0000000080)='silent\x00', 0x0, 0x0) read(r0, &(0x7f0000001080)=""/4097, 0x1001) 10:18:15 executing program 5: 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) r1 = socket$inet6(0xa, 0x3, 0x3a) setsockopt$inet6_MRT6_ADD_MFC(r1, 0x29, 0x7, 0x0, 0x0) 10:18:15 executing program 2: r0 = epoll_create1(0x0) r1 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) ioctl$TCSETS(r1, 0x40045431, &(0x7f0000000240)={0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000ddc1517600"}) r2 = syz_open_pts(r1, 0x0) epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r2, &(0x7f0000000080)) r3 = fcntl$dupfd(r2, 0x0, r2) ioctl$TCXONC(r3, 0x540a, 0x0) ioctl$TCSETS(r1, 0x5402, &(0x7f0000000100)={0x0, 0x0, 0x0, 0x0, 0x0, "91cc97ecf16a7a655aecad9bb8c15afdec361f"}) 10:18:15 executing program 3: rt_sigaction(0x0, &(0x7f0000000080)={0x0, 0x0, 0x0}, 0x0, 0x8, &(0x7f00000000c0)) 10:18:15 executing program 4: r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/exe\x00', 0x0, 0x0) mmap(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x2800004, 0x12, r0, 0x0) r1 = socket$inet6(0xa, 0x1, 0x0) setsockopt$inet6_mreq(r1, 0x29, 0x2, &(0x7f0000000200)={@initdev={0xfe, 0x88, '\x00', 0x0, 0x0}}, 0x14) setsockopt$inet6_int(r1, 0x29, 0x8, &(0x7f0000000080), 0xe) getsockopt$inet6_buf(r1, 0x29, 0x6, &(0x7f00000000c0)=""/122, &(0x7f0000000140)=0x7a) [ 32.101833][ T25] audit: type=1400 audit(1621073895.481:8): avc: denied { execmem } for pid=1759 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 32.201771][ T1765] cgroup: Unknown subsys name 'perf_event' [ 32.208135][ T1766] cgroup: Unknown subsys name 'perf_event' [ 32.214523][ T1766] cgroup: Unknown subsys name 'net_cls' [ 32.221141][ T1765] cgroup: Unknown subsys name 'net_cls' [ 32.233275][ T1767] cgroup: Unknown subsys name 'perf_event' [ 32.240009][ T1767] cgroup: Unknown subsys name 'net_cls' [ 32.247915][ T1770] cgroup: Unknown subsys name 'perf_event' [ 32.253895][ T1770] cgroup: Unknown subsys name 'net_cls' [ 32.264573][ T1774] cgroup: Unknown subsys name 'perf_event' [ 32.267995][ T1776] cgroup: Unknown subsys name 'perf_event' [ 32.271152][ T1774] cgroup: Unknown subsys name 'net_cls' [ 32.278798][ T1776] cgroup: Unknown subsys name 'net_cls'