Warning: Permanently added '10.128.0.109' (ECDSA) to the list of known hosts. 2020/06/16 11:02:27 fuzzer started 2020/06/16 11:02:27 dialing manager at 10.128.0.105:37643 2020/06/16 11:02:27 syscalls: 3085 2020/06/16 11:02:27 code coverage: enabled 2020/06/16 11:02:27 comparison tracing: enabled 2020/06/16 11:02:27 extra coverage: enabled 2020/06/16 11:02:27 setuid sandbox: enabled 2020/06/16 11:02:27 namespace sandbox: enabled 2020/06/16 11:02:27 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/16 11:02:27 fault injection: enabled 2020/06/16 11:02:27 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/16 11:02:27 net packet injection: enabled 2020/06/16 11:02:27 net device setup: enabled 2020/06/16 11:02:27 concurrency sanitizer: enabled 2020/06/16 11:02:27 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/16 11:02:27 USB emulation: enabled 2020/06/16 11:02:28 suppressing KCSAN reports in functions: 'alloc_pid' 'copy_process' 'blk_mq_get_request' 'find_get_pages_range_tag' '__send_signal' 'generic_file_read_iter' 'ep_poll' 'complete_signal' 'generic_fillattr' '__ext4_new_inode' syzkaller login: [ 51.880759][ T8919] ================================================================== [ 51.888955][ T8919] BUG: KCSAN: data-race in mod_timer / timer_clear_idle [ 51.895885][ T8919] [ 51.898199][ T8919] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1: [ 51.905561][ T8919] timer_clear_idle+0x3d/0x50 [ 51.910234][ T8919] __tick_nohz_idle_restart_tick+0x32/0x1a0 [ 51.916105][ T8919] tick_nohz_idle_exit+0x19c/0x1d0 [ 51.921208][ T8919] do_idle+0xac/0x290 [ 51.925337][ T8919] cpu_startup_entry+0x14/0x20 [ 51.930076][ T8919] start_secondary+0x169/0x1b0 [ 51.934816][ T8919] secondary_startup_64+0xa4/0xb0 [ 51.939821][ T8919] [ 51.942129][ T8919] read to 0xffff88812c11dca4 of 1 bytes by task 8919 on cpu 0: [ 51.949646][ T8919] mod_timer+0x546/0x830 [ 51.953864][ T8919] sk_reset_timer+0x29/0xc0 [ 51.958344][ T8919] tcp_rearm_rto+0x1ce/0x280 [ 51.962911][ T8919] tcp_event_new_data_sent+0x23f/0x260 [ 51.968414][ T8919] tcp_write_xmit+0x5c6/0x31e0 [ 51.973212][ T8919] __tcp_push_pending_frames+0x72/0x1b0 [ 51.978782][ T8919] tcp_push+0x1ec/0x3e0 [ 51.982917][ T8919] tcp_sendmsg_locked+0x1de3/0x20f0 [ 51.988096][ T8919] tcp_sendmsg+0x35/0x50 [ 51.992322][ T8919] inet_sendmsg+0x69/0x90 [ 51.996642][ T8919] sock_sendmsg+0x98/0xc0 [ 52.000952][ T8919] sock_write_iter+0x186/0x240 [ 52.005694][ T8919] new_sync_write+0x303/0x400 [ 52.010363][ T8919] __vfs_write+0x9e/0xb0 [ 52.014594][ T8919] vfs_write+0x189/0x380 [ 52.018810][ T8919] ksys_write+0x16a/0x1a0 [ 52.023111][ T8919] __x64_sys_write+0x49/0x60 [ 52.027679][ T8919] do_syscall_64+0xc7/0x3b0 [ 52.032156][ T8919] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.038030][ T8919] [ 52.040346][ T8919] Reported by Kernel Concurrency Sanitizer on: [ 52.046490][ T8919] CPU: 0 PID: 8919 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 52.054720][ T8919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.064748][ T8919] ================================================================== [ 52.072797][ T8919] Kernel panic - not syncing: panic_on_warn set ... [ 52.079359][ T8919] CPU: 0 PID: 8919 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 52.087566][ T8919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.097681][ T8919] Call Trace: [ 52.100957][ T8919] dump_stack+0x11d/0x187 [ 52.105283][ T8919] panic+0x210/0x640 [ 52.109172][ T8919] ? vprintk_func+0x89/0x13a [ 52.113738][ T8919] kcsan_report.cold+0xc/0x1a [ 52.118400][ T8919] kcsan_setup_watchpoint+0x3fb/0x440 [ 52.123766][ T8919] mod_timer+0x546/0x830 [ 52.127989][ T8919] sk_reset_timer+0x29/0xc0 [ 52.132483][ T8919] tcp_rearm_rto+0x1ce/0x280 [ 52.137069][ T8919] tcp_event_new_data_sent+0x23f/0x260 [ 52.142682][ T8919] tcp_write_xmit+0x5c6/0x31e0 [ 52.147445][ T8919] ? iov_iter_advance+0x21c/0x900 [ 52.152579][ T8919] __tcp_push_pending_frames+0x72/0x1b0 [ 52.158102][ T8919] tcp_push+0x1ec/0x3e0 [ 52.162236][ T8919] tcp_sendmsg_locked+0x1de3/0x20f0 [ 52.167524][ T8919] ? aa_label_sk_perm.part.0+0x220/0x290 [ 52.173157][ T8919] tcp_sendmsg+0x35/0x50 [ 52.177379][ T8919] inet_sendmsg+0x69/0x90 [ 52.181703][ T8919] ? inet_send_prepare+0x1f0/0x1f0 [ 52.186909][ T8919] sock_sendmsg+0x98/0xc0 [ 52.191239][ T8919] sock_write_iter+0x186/0x240 [ 52.195989][ T8919] new_sync_write+0x303/0x400 [ 52.200646][ T8919] __vfs_write+0x9e/0xb0 [ 52.204880][ T8919] vfs_write+0x189/0x380 [ 52.209097][ T8919] ksys_write+0x16a/0x1a0 [ 52.213403][ T8919] __x64_sys_write+0x49/0x60 [ 52.217974][ T8919] do_syscall_64+0xc7/0x3b0 [ 52.222458][ T8919] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 52.228325][ T8919] RIP: 0033:0x4b3cdb [ 52.232216][ T8919] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 bb a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 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 [ 52.251814][ T8919] RSP: 002b:000000c0011a5540 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 52.260211][ T8919] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb [ 52.268225][ T8919] RDX: 0000000000000007 RSI: 000000c00000a200 RDI: 0000000000000006 [ 52.276196][ T8919] RBP: 000000c0011a5590 R08: 000000c00000a201 R09: 0000000000000007 [ 52.284170][ T8919] R10: 000000c000114000 R11: 0000000000000202 R12: 000000000000011e [ 52.292131][ T8919] R13: 000000c0004a2000 R14: 000000000000000f R15: 0000000000000241 [ 53.374640][ T8919] Shutting down cpus with NMI [ 53.380518][ T8919] Kernel Offset: disabled [ 53.384839][ T8919] Rebooting in 86400 seconds..