Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts. 2020/05/23 22:44:36 fuzzer started 2020/05/23 22:44:37 dialing manager at 10.128.0.105:46225 2020/05/23 22:44:38 syscalls: 3055 2020/05/23 22:44:38 code coverage: enabled 2020/05/23 22:44:38 comparison tracing: enabled 2020/05/23 22:44:38 extra coverage: enabled 2020/05/23 22:44:38 setuid sandbox: enabled 2020/05/23 22:44:38 namespace sandbox: enabled 2020/05/23 22:44:38 Android sandbox: /sys/fs/selinux/policy does not exist 2020/05/23 22:44:38 fault injection: enabled 2020/05/23 22:44:38 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/05/23 22:44:38 net packet injection: enabled 2020/05/23 22:44:38 net device setup: enabled 2020/05/23 22:44:38 concurrency sanitizer: enabled 2020/05/23 22:44:38 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/05/23 22:44:38 USB emulation: enabled 2020/05/23 22:44:39 adding functions to KCSAN blacklist: 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'do_nanosleep' 'run_timer_softirq' 'ep_poll' 'copy_process' 'generic_write_end' '__ext4_new_inode' 'page_counter_charge' syzkaller login: [ 74.454373][ T8908] ================================================================== [ 74.462562][ T8908] BUG: KCSAN: data-race in mod_timer / timer_clear_idle [ 74.469526][ T8908] [ 74.471870][ T8908] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1: [ 74.479281][ T8908] timer_clear_idle+0x3d/0x50 [ 74.484006][ T8908] __tick_nohz_idle_restart_tick+0x32/0x1a0 [ 74.490380][ T8908] tick_nohz_idle_exit+0x19c/0x1d0 [ 74.496267][ T8908] do_idle+0xac/0x290 [ 74.500278][ T8908] cpu_startup_entry+0x14/0x20 [ 74.505151][ T8908] start_secondary+0x169/0x1b0 [ 74.509919][ T8908] secondary_startup_64+0xa4/0xb0 [ 74.515112][ T8908] [ 74.517437][ T8908] read to 0xffff88812c11dca4 of 1 bytes by task 8908 on cpu 0: [ 74.525176][ T8908] mod_timer+0x631/0x830 [ 74.529958][ T8908] sk_reset_timer+0x29/0xc0 [ 74.534476][ T8908] tcp_rearm_rto+0x1ce/0x280 [ 74.539078][ T8908] tcp_event_new_data_sent+0x23f/0x260 [ 74.544541][ T8908] tcp_write_xmit+0x5c6/0x31e0 [ 74.549342][ T8908] __tcp_push_pending_frames+0x72/0x1b0 [ 74.556030][ T8908] tcp_push+0x1ec/0x3e0 [ 74.560260][ T8908] tcp_sendmsg_locked+0x1de3/0x20f0 [ 74.566725][ T8908] tcp_sendmsg+0x35/0x50 [ 74.571431][ T8908] inet_sendmsg+0x69/0x90 [ 74.575885][ T8908] sock_sendmsg+0x98/0xc0 [ 74.580391][ T8908] sock_write_iter+0x186/0x240 [ 74.585180][ T8908] new_sync_write+0x303/0x400 [ 74.590324][ T8908] __vfs_write+0x9e/0xb0 [ 74.594722][ T8908] vfs_write+0x189/0x380 [ 74.599091][ T8908] ksys_write+0x16a/0x1a0 [ 74.603918][ T8908] __x64_sys_write+0x49/0x60 [ 74.609041][ T8908] do_syscall_64+0xc7/0x3b0 [ 74.615055][ T8908] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.625500][ T8908] [ 74.627890][ T8908] Reported by Kernel Concurrency Sanitizer on: [ 74.634836][ T8908] CPU: 0 PID: 8908 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 74.644317][ T8908] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.654533][ T8908] ================================================================== [ 74.662764][ T8908] Kernel panic - not syncing: panic_on_warn set ... [ 74.669408][ T8908] CPU: 0 PID: 8908 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 74.677648][ T8908] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.688054][ T8908] Call Trace: [ 74.691348][ T8908] dump_stack+0x11d/0x187 [ 74.695690][ T8908] panic+0x210/0x640 [ 74.699601][ T8908] ? vprintk_func+0x89/0x13a [ 74.704200][ T8908] kcsan_report.cold+0xc/0x1a [ 74.708895][ T8908] kcsan_setup_watchpoint+0x3fb/0x440 [ 74.714293][ T8908] mod_timer+0x631/0x830 [ 74.718544][ T8908] sk_reset_timer+0x29/0xc0 [ 74.723064][ T8908] tcp_rearm_rto+0x1ce/0x280 [ 74.727658][ T8908] tcp_event_new_data_sent+0x23f/0x260 [ 74.733488][ T8908] tcp_write_xmit+0x5c6/0x31e0 [ 74.738276][ T8908] ? iov_iter_advance+0x21c/0x900 [ 74.744228][ T8908] __tcp_push_pending_frames+0x72/0x1b0 [ 74.750520][ T8908] tcp_push+0x1ec/0x3e0 [ 74.754802][ T8908] tcp_sendmsg_locked+0x1de3/0x20f0 [ 74.760248][ T8908] ? aa_label_sk_perm.part.0+0x220/0x290 [ 74.765936][ T8908] tcp_sendmsg+0x35/0x50 [ 74.770181][ T8908] inet_sendmsg+0x69/0x90 [ 74.774911][ T8908] ? inet_send_prepare+0x1f0/0x1f0 [ 74.780131][ T8908] sock_sendmsg+0x98/0xc0 [ 74.785184][ T8908] sock_write_iter+0x186/0x240 [ 74.790255][ T8908] new_sync_write+0x303/0x400 [ 74.795734][ T8908] __vfs_write+0x9e/0xb0 [ 74.799979][ T8908] vfs_write+0x189/0x380 [ 74.804269][ T8908] ksys_write+0x16a/0x1a0 [ 74.808866][ T8908] __x64_sys_write+0x49/0x60 [ 74.813474][ T8908] do_syscall_64+0xc7/0x3b0 [ 74.818427][ T8908] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.824316][ T8908] RIP: 0033:0x47c530 [ 74.828248][ T8908] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 74.853434][ T8908] RSP: 002b:000000c421bdb4a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 74.861867][ T8908] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 74.869839][ T8908] RDX: 0000000000000007 RSI: 000000c420356020 RDI: 0000000000000003 [ 74.877838][ T8908] RBP: 000000c421bdb4f8 R08: 0000000000000000 R09: 0000000000000000 [ 74.885862][ T8908] R10: 0000000000000000 R11: 0000000000000202 R12: 000000c4200c3b00 [ 74.893871][ T8908] R13: 0000000000000007 R14: 0000000000c78780 R15: 0000000000000940 [ 75.993043][ T8908] Shutting down cpus with NMI [ 76.000258][ T8908] Kernel Offset: disabled [ 76.004610][ T8908] Rebooting in 86400 seconds..