Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. 2020/05/24 13:20:08 fuzzer started 2020/05/24 13:20:08 dialing manager at 10.128.0.105:40647 2020/05/24 13:20:12 syscalls: 3055 2020/05/24 13:20:12 code coverage: enabled 2020/05/24 13:20:12 comparison tracing: enabled 2020/05/24 13:20:12 extra coverage: enabled 2020/05/24 13:20:12 setuid sandbox: enabled 2020/05/24 13:20:12 namespace sandbox: enabled 2020/05/24 13:20:12 Android sandbox: /sys/fs/selinux/policy does not exist 2020/05/24 13:20:12 fault injection: enabled 2020/05/24 13:20:12 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/05/24 13:20:12 net packet injection: enabled 2020/05/24 13:20:12 net device setup: enabled 2020/05/24 13:20:12 concurrency sanitizer: enabled 2020/05/24 13:20:12 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/05/24 13:20:12 USB emulation: enabled syzkaller login: [ 56.793392][ T8921] KCSAN: could not find function: '_find_next_bit' 2020/05/24 13:20:15 adding functions to KCSAN blacklist: '_find_next_bit' '__ext4_new_inode' '__snd_rawmidi_transmit_ack' 'ext4_mark_iloc_dirty' 'ep_poll' 'run_timer_softirq' 'page_counter_charge' 'do_exit' 'blk_mq_sched_dispatch_requests' 'do_nanosleep' '__mpage_writepage' 'alloc_pid' 'find_get_pages_range_tag' 'generic_write_end' 'io_sq_thread' 'blk_mq_get_request' [ 107.912196][ T8911] ================================================================== [ 107.920447][ T8911] BUG: KCSAN: data-race in mod_timer / timer_clear_idle [ 107.927362][ T8911] [ 107.929678][ T8911] write to 0xffff88812c01dca4 of 1 bytes by task 0 on cpu 0: [ 107.937207][ T8911] timer_clear_idle+0x3d/0x50 [ 107.941873][ T8911] __tick_nohz_idle_restart_tick+0x32/0x1a0 [ 107.947764][ T8911] tick_nohz_idle_exit+0x19c/0x1d0 [ 107.952872][ T8911] do_idle+0xac/0x290 [ 107.956830][ T8911] cpu_startup_entry+0x14/0x20 [ 107.961567][ T8911] rest_init+0xe4/0xeb [ 107.965610][ T8911] arch_call_rest_init+0x13/0x2b [ 107.970521][ T8911] start_kernel+0x7fe/0x823 [ 107.975001][ T8911] secondary_startup_64+0xa4/0xb0 [ 107.979992][ T8911] [ 107.982299][ T8911] read to 0xffff88812c01dca4 of 1 bytes by task 8911 on cpu 1: [ 107.989816][ T8911] mod_timer+0x631/0x830 [ 107.994034][ T8911] sk_reset_timer+0x29/0xc0 [ 107.998515][ T8911] tcp_rearm_rto+0x1ce/0x280 [ 108.003081][ T8911] tcp_event_new_data_sent+0x23f/0x260 [ 108.008527][ T8911] tcp_write_xmit+0x5c6/0x31e0 [ 108.013276][ T8911] __tcp_push_pending_frames+0x72/0x1b0 [ 108.018799][ T8911] tcp_push+0x1ec/0x3e0 [ 108.022928][ T8911] tcp_sendmsg_locked+0x1de3/0x20f0 [ 108.028109][ T8911] tcp_sendmsg+0x35/0x50 [ 108.032350][ T8911] inet_sendmsg+0x69/0x90 [ 108.036662][ T8911] sock_sendmsg+0x98/0xc0 [ 108.040969][ T8911] sock_write_iter+0x186/0x240 [ 108.045712][ T8911] new_sync_write+0x303/0x400 [ 108.050366][ T8911] __vfs_write+0x9e/0xb0 [ 108.054580][ T8911] vfs_write+0x189/0x380 [ 108.058797][ T8911] ksys_write+0x16a/0x1a0 [ 108.063099][ T8911] __x64_sys_write+0x49/0x60 [ 108.067665][ T8911] do_syscall_64+0xc7/0x3b0 [ 108.072280][ T8911] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 108.078180][ T8911] [ 108.080484][ T8911] Reported by Kernel Concurrency Sanitizer on: [ 108.086626][ T8911] CPU: 1 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 108.094843][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.104960][ T8911] ================================================================== [ 108.113183][ T8911] Kernel panic - not syncing: panic_on_warn set ... [ 108.119934][ T8911] CPU: 1 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 108.128816][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.138958][ T8911] Call Trace: [ 108.142255][ T8911] dump_stack+0x11d/0x187 [ 108.146661][ T8911] panic+0x210/0x640 [ 108.150710][ T8911] ? vprintk_func+0x89/0x13a [ 108.155277][ T8911] kcsan_report.cold+0xc/0x1a [ 108.159958][ T8911] kcsan_setup_watchpoint+0x3fb/0x440 [ 108.165335][ T8911] mod_timer+0x631/0x830 [ 108.169573][ T8911] sk_reset_timer+0x29/0xc0 [ 108.174070][ T8911] tcp_rearm_rto+0x1ce/0x280 [ 108.178814][ T8911] tcp_event_new_data_sent+0x23f/0x260 [ 108.184355][ T8911] tcp_write_xmit+0x5c6/0x31e0 [ 108.189286][ T8911] ? iov_iter_advance+0x21c/0x900 [ 108.194396][ T8911] __tcp_push_pending_frames+0x72/0x1b0 [ 108.199930][ T8911] tcp_push+0x1ec/0x3e0 [ 108.204084][ T8911] tcp_sendmsg_locked+0x1de3/0x20f0 [ 108.209323][ T8911] ? aa_label_sk_perm.part.0+0x220/0x290 [ 108.214948][ T8911] tcp_sendmsg+0x35/0x50 [ 108.219180][ T8911] inet_sendmsg+0x69/0x90 [ 108.223490][ T8911] ? inet_send_prepare+0x1f0/0x1f0 [ 108.228590][ T8911] sock_sendmsg+0x98/0xc0 [ 108.232898][ T8911] sock_write_iter+0x186/0x240 [ 108.237659][ T8911] new_sync_write+0x303/0x400 [ 108.242336][ T8911] __vfs_write+0x9e/0xb0 [ 108.246686][ T8911] vfs_write+0x189/0x380 [ 108.251098][ T8911] ksys_write+0x16a/0x1a0 [ 108.255416][ T8911] __x64_sys_write+0x49/0x60 [ 108.260594][ T8911] do_syscall_64+0xc7/0x3b0 [ 108.265079][ T8911] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 108.271031][ T8911] RIP: 0033:0x47c530 [ 108.274922][ T8911] 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 [ 108.294635][ T8911] RSP: 002b:000000c420cb34a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 108.303038][ T8911] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 108.311015][ T8911] RDX: 0000000000000007 RSI: 000000c420350200 RDI: 0000000000000003 [ 108.318980][ T8911] RBP: 000000c420cb34f8 R08: 0000000000000000 R09: 0000000000000000 [ 108.327008][ T8911] R10: 0000000000000000 R11: 0000000000000202 R12: 000000c4200c3b00 [ 108.335075][ T8911] R13: 0000000000000007 R14: 0000000000c78780 R15: 0000000000007f20 [ 109.444652][ T8911] Shutting down cpus with NMI [ 109.451066][ T8911] Kernel Offset: disabled [ 109.455429][ T8911] Rebooting in 86400 seconds..