Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. 2020/11/05 21:14:20 fuzzer started 2020/11/05 21:14:20 dialing manager at 10.128.0.105:38935 2020/11/05 21:14:21 syscalls: 3448 2020/11/05 21:14:21 code coverage: enabled 2020/11/05 21:14:21 comparison tracing: enabled 2020/11/05 21:14:21 extra coverage: enabled 2020/11/05 21:14:21 setuid sandbox: enabled 2020/11/05 21:14:21 namespace sandbox: enabled 2020/11/05 21:14:21 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/05 21:14:21 fault injection: enabled 2020/11/05 21:14:21 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/05 21:14:21 net packet injection: enabled 2020/11/05 21:14:21 net device setup: enabled 2020/11/05 21:14:21 concurrency sanitizer: enabled 2020/11/05 21:14:21 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/05 21:14:21 USB emulation: enabled 2020/11/05 21:14:21 hci packet injection: enabled 2020/11/05 21:14:21 wifi device emulation: enabled 2020/11/05 21:14:23 suppressing KCSAN reports in functions: 'snd_rawmidi_poll' 'n_tty_receive_buf_common' 'complete_signal' 'ext4_free_inode' 'blk_mq_dispatch_rq_list' 'filemap_map_pages' '__xa_clear_mark' '__ext4_new_inode' 'find_get_pages_range_tag' 'dd_has_work' 'ext4_writepages' 'do_signal_stop' syzkaller login: [ 32.608613][ T8433] ================================================================== [ 32.616752][ T8433] BUG: KCSAN: data-race in __delayacct_blkio_end / __delayacct_blkio_start [ 32.625313][ T8433] [ 32.627658][ T8433] write to 0xffff888100c82878 of 8 bytes by task 8434 on cpu 0: [ 32.635273][ T8433] __delayacct_blkio_start+0x35/0x40 [ 32.640547][ T8433] __schedule+0x18c/0x550 [ 32.644870][ T8433] schedule+0x7f/0xb0 [ 32.648854][ T8433] io_schedule+0x3b/0x50 [ 32.653087][ T8433] wait_on_page_bit_common+0x633/0x910 [ 32.658535][ T8433] filemap_fault+0x87a/0x12e0 [ 32.663199][ T8433] ext4_filemap_fault+0x4b/0x60 [ 32.668023][ T8433] do_read_fault+0x403/0x760 [ 32.672595][ T8433] handle_mm_fault+0xfeb/0x1770 [ 32.677426][ T8433] do_user_addr_fault+0x33e/0x730 [ 32.682443][ T8433] exc_page_fault+0x91/0x290 [ 32.687008][ T8433] asm_exc_page_fault+0x1e/0x30 [ 32.691835][ T8433] [ 32.694140][ T8433] read to 0xffff888100c82878 of 8 bytes by task 8433 on cpu 1: [ 32.701660][ T8433] __delayacct_blkio_end+0x70/0xf0 [ 32.706749][ T8433] try_to_wake_up+0x107/0x470 [ 32.711412][ T8433] wake_page_function+0xd9/0x200 [ 32.716350][ T8433] __wake_up_common+0xbc/0x130 [ 32.721104][ T8433] wake_up_page_bit+0xa4/0x190 [ 32.725841][ T8433] filemap_map_pages+0x81b/0x9a0 [ 32.730752][ T8433] do_read_fault+0x233/0x760 [ 32.735314][ T8433] handle_mm_fault+0xfeb/0x1770 [ 32.740140][ T8433] do_user_addr_fault+0x33e/0x730 [ 32.745401][ T8433] exc_page_fault+0x91/0x290 [ 32.749975][ T8433] asm_exc_page_fault+0x1e/0x30 [ 32.754792][ T8433] [ 32.757091][ T8433] Reported by Kernel Concurrency Sanitizer on: [ 32.763236][ T8433] CPU: 1 PID: 8433 Comm: syz-fuzzer Not tainted 5.10.0-rc2-syzkaller #0 [ 32.771544][ T8433] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.781586][ T8433] ================================================================== [ 32.789645][ T8433] Kernel panic - not syncing: panic_on_warn set ... [ 32.796231][ T8433] CPU: 1 PID: 8433 Comm: syz-fuzzer Not tainted 5.10.0-rc2-syzkaller #0 [ 32.804727][ T8433] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.815569][ T8433] Call Trace: [ 32.818974][ T8433] dump_stack+0x116/0x15d [ 32.823806][ T8433] panic+0x1e7/0x5fa [ 32.827700][ T8433] ? vprintk_emit+0x2f2/0x370 [ 32.832391][ T8433] kcsan_report+0x67b/0x680 [ 32.836977][ T8433] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 32.842686][ T8433] ? __delayacct_blkio_end+0x70/0xf0 [ 32.847971][ T8433] ? try_to_wake_up+0x107/0x470 [ 32.852993][ T8433] ? wake_page_function+0xd9/0x200 [ 32.858102][ T8433] ? __wake_up_common+0xbc/0x130 [ 32.863046][ T8433] ? wake_up_page_bit+0xa4/0x190 [ 32.868181][ T8433] ? filemap_map_pages+0x81b/0x9a0 [ 32.873559][ T8433] ? do_read_fault+0x233/0x760 [ 32.878299][ T8433] ? handle_mm_fault+0xfeb/0x1770 [ 32.884359][ T8433] ? do_user_addr_fault+0x33e/0x730 [ 32.889573][ T8433] ? exc_page_fault+0x91/0x290 [ 32.894419][ T8433] ? asm_exc_page_fault+0x1e/0x30 [ 32.899452][ T8433] ? update_load_avg+0x1ad/0x2d0 [ 32.904374][ T8433] kcsan_setup_watchpoint+0x46a/0x4d0 [ 32.909735][ T8433] __delayacct_blkio_end+0x70/0xf0 [ 32.914842][ T8433] try_to_wake_up+0x107/0x470 [ 32.919512][ T8433] wake_page_function+0xd9/0x200 [ 32.924443][ T8433] __wake_up_common+0xbc/0x130 [ 32.929183][ T8433] wake_up_page_bit+0xa4/0x190 [ 32.933927][ T8433] filemap_map_pages+0x81b/0x9a0 [ 32.938950][ T8433] do_read_fault+0x233/0x760 [ 32.943541][ T8433] handle_mm_fault+0xfeb/0x1770 [ 32.948463][ T8433] do_user_addr_fault+0x33e/0x730 [ 32.953483][ T8433] exc_page_fault+0x91/0x290 [ 32.958149][ T8433] ? asm_exc_page_fault+0x8/0x30 [ 32.963246][ T8433] asm_exc_page_fault+0x1e/0x30 [ 32.968095][ T8433] RIP: 0033:0x41f64a [ 32.971988][ T8433] Code: 31 ff eb 09 48 ff c7 d1 eb 48 83 c6 08 48 83 ff 08 0f 8d f3 00 00 00 48 39 ce 0f 83 ea 00 00 00 0f ba e3 00 73 de 4c 8d 04 16 <4d> 8b 00 4d 85 c0 74 d2 48 89 7c 24 40 4c 89 44 24 38 48 89 74 24 [ 32.993261][ T8433] RSP: 002b:000000c00004fe20 EFLAGS: 00010287 [ 32.999322][ T8433] RAX: 00007fc694358000 RBX: 0000000000000089 RCX: 0000000000040000 [ 33.007286][ T8433] RDX: 000000000164b100 RSI: 0000000000014f00 RDI: 0000000000000000 [ 33.015765][ T8433] RBP: 000000c00004fe70 R08: 0000000001660000 R09: 0000000000000032 [ 33.026534][ T8433] R10: 0000000001a77108 R11: 0000000000000043 R12: 0000000000000003 [ 33.036171][ T8433] R13: 0000000000000009 R14: 000080c0002a8000 R15: 000080c0002affff [ 34.072495][ T8433] Shutting down cpus with NMI [ 34.077367][ T8433] Kernel Offset: disabled [ 34.081681][ T8433] Rebooting in 86400 seconds..