Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. 2020/06/18 13:01:11 fuzzer started 2020/06/18 13:01:11 dialing manager at 10.128.0.105:34299 2020/06/18 13:01:14 syscalls: 3089 2020/06/18 13:01:14 code coverage: enabled 2020/06/18 13:01:14 comparison tracing: enabled 2020/06/18 13:01:14 extra coverage: enabled 2020/06/18 13:01:14 setuid sandbox: enabled 2020/06/18 13:01:14 namespace sandbox: enabled 2020/06/18 13:01:14 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/18 13:01:14 fault injection: enabled 2020/06/18 13:01:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/18 13:01:14 net packet injection: enabled 2020/06/18 13:01:14 net device setup: enabled 2020/06/18 13:01:14 concurrency sanitizer: enabled 2020/06/18 13:01:14 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/18 13:01:14 USB emulation: enabled syzkaller login: [ 55.433618][ T8919] KCSAN: could not find function: '_find_next_bit' 2020/06/18 13:01:15 suppressing KCSAN reports in functions: 'ep_poll' 'ext4_mark_iloc_dirty' 'generic_fillattr' 'find_get_pages_range_tag' '__filemap_fdatawrite_range' '_find_next_bit' 'blk_mq_get_request' '__ext4_new_inode' 'run_timer_softirq' 'tick_nohz_next_event' 'generic_write_end' [ 75.353753][ T8906] ================================================================== [ 75.361958][ T8906] BUG: KCSAN: data-race in mod_timer / timer_clear_idle [ 75.368906][ T8906] [ 75.371214][ T8906] write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1: [ 75.378564][ T8906] timer_clear_idle+0x3d/0x50 [ 75.383234][ T8906] __tick_nohz_idle_restart_tick+0x32/0x1a0 [ 75.389103][ T8906] tick_nohz_idle_exit+0x19c/0x1d0 [ 75.394220][ T8906] do_idle+0xac/0x290 [ 75.398178][ T8906] cpu_startup_entry+0x14/0x20 [ 75.402931][ T8906] start_secondary+0x169/0x1b0 [ 75.407669][ T8906] secondary_startup_64+0xa4/0xb0 [ 75.412659][ T8906] [ 75.414982][ T8906] read to 0xffff88812c11dca4 of 1 bytes by task 8906 on cpu 0: [ 75.422514][ T8906] mod_timer+0x631/0x830 [ 75.426745][ T8906] sk_reset_timer+0x29/0xc0 [ 75.431229][ T8906] tcp_rearm_rto+0x1ce/0x280 [ 75.436052][ T8906] tcp_event_new_data_sent+0x23f/0x260 [ 75.441493][ T8906] tcp_write_xmit+0x5c6/0x31e0 [ 75.446280][ T8906] __tcp_push_pending_frames+0x72/0x1b0 [ 75.451800][ T8906] tcp_push+0x1ec/0x3e0 [ 75.455932][ T8906] tcp_sendmsg_locked+0x1de3/0x20f0 [ 75.461103][ T8906] tcp_sendmsg+0x35/0x50 [ 75.465319][ T8906] inet_sendmsg+0x69/0x90 [ 75.469625][ T8906] sock_sendmsg+0x98/0xc0 [ 75.473927][ T8906] sock_write_iter+0x186/0x240 [ 75.478667][ T8906] new_sync_write+0x303/0x400 [ 75.483319][ T8906] __vfs_write+0x9e/0xb0 [ 75.487534][ T8906] vfs_write+0x189/0x380 [ 75.491750][ T8906] ksys_write+0x16a/0x1a0 [ 75.496052][ T8906] __x64_sys_write+0x49/0x60 [ 75.500634][ T8906] do_syscall_64+0xc7/0x3b0 [ 75.505112][ T8906] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.510986][ T8906] [ 75.513303][ T8906] Reported by Kernel Concurrency Sanitizer on: [ 75.519445][ T8906] CPU: 0 PID: 8906 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 75.527664][ T8906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.537691][ T8906] ================================================================== [ 75.545737][ T8906] Kernel panic - not syncing: panic_on_warn set ... [ 75.552299][ T8906] CPU: 0 PID: 8906 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 75.560510][ T8906] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.570543][ T8906] Call Trace: [ 75.573820][ T8906] dump_stack+0x11d/0x187 [ 75.578156][ T8906] panic+0x210/0x640 [ 75.582038][ T8906] ? vprintk_func+0x89/0x13a [ 75.586733][ T8906] kcsan_report.cold+0xc/0x1a [ 75.591410][ T8906] kcsan_setup_watchpoint+0x3fb/0x440 [ 75.596776][ T8906] mod_timer+0x631/0x830 [ 75.601000][ T8906] sk_reset_timer+0x29/0xc0 [ 75.605484][ T8906] tcp_rearm_rto+0x1ce/0x280 [ 75.610055][ T8906] tcp_event_new_data_sent+0x23f/0x260 [ 75.615500][ T8906] tcp_write_xmit+0x5c6/0x31e0 [ 75.620245][ T8906] ? free_proxy_bufs.isra.0+0xb5/0x1b0 [ 75.625681][ T8906] ? iov_iter_advance+0x21c/0x900 [ 75.630793][ T8906] __tcp_push_pending_frames+0x72/0x1b0 [ 75.636326][ T8906] tcp_push+0x1ec/0x3e0 [ 75.640459][ T8906] tcp_sendmsg_locked+0x1de3/0x20f0 [ 75.645639][ T8906] ? aa_label_sk_perm.part.0+0x220/0x290 [ 75.651250][ T8906] tcp_sendmsg+0x35/0x50 [ 75.655473][ T8906] inet_sendmsg+0x69/0x90 [ 75.659823][ T8906] ? inet_send_prepare+0x1f0/0x1f0 [ 75.664923][ T8906] sock_sendmsg+0x98/0xc0 [ 75.669243][ T8906] sock_write_iter+0x186/0x240 [ 75.673989][ T8906] new_sync_write+0x303/0x400 [ 75.678734][ T8906] __vfs_write+0x9e/0xb0 [ 75.682966][ T8906] vfs_write+0x189/0x380 [ 75.687182][ T8906] ksys_write+0x16a/0x1a0 [ 75.691506][ T8906] __x64_sys_write+0x49/0x60 [ 75.696075][ T8906] do_syscall_64+0xc7/0x3b0 [ 75.700558][ T8906] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.706424][ T8906] RIP: 0033:0x4b3cdb [ 75.710312][ T8906] 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 [ 75.729903][ T8906] RSP: 002b:000000c003535540 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 75.738299][ T8906] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb [ 75.746256][ T8906] RDX: 0000000000000007 RSI: 000000c00000a200 RDI: 0000000000000006 [ 75.754203][ T8906] RBP: 000000c003535590 R08: 000000c00000a201 R09: 0000000000000007 [ 75.762164][ T8906] R10: 000000c0000c4000 R11: 0000000000000202 R12: 000000000000011e [ 75.770111][ T8906] R13: 000000c000370000 R14: 0000000000000007 R15: 0000000000006292 [ 76.862049][ T8906] Shutting down cpus with NMI [ 76.868089][ T8906] Kernel Offset: disabled [ 76.872410][ T8906] Rebooting in 86400 seconds..