Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts. 2020/11/21 11:13:27 fuzzer started 2020/11/21 11:13:27 dialing manager at 10.128.0.105:42233 2020/11/21 11:13:29 syscalls: 3448 2020/11/21 11:13:29 code coverage: enabled 2020/11/21 11:13:29 comparison tracing: enabled 2020/11/21 11:13:29 extra coverage: enabled 2020/11/21 11:13:29 setuid sandbox: enabled 2020/11/21 11:13:29 namespace sandbox: enabled 2020/11/21 11:13:29 Android sandbox: /sys/fs/selinux/policy does not exist 2020/11/21 11:13:29 fault injection: enabled 2020/11/21 11:13:29 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/11/21 11:13:29 net packet injection: enabled 2020/11/21 11:13:29 net device setup: enabled 2020/11/21 11:13:29 concurrency sanitizer: enabled 2020/11/21 11:13:29 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/11/21 11:13:29 USB emulation: enabled 2020/11/21 11:13:29 hci packet injection: enabled 2020/11/21 11:13:29 wifi device emulation: enabled 2020/11/21 11:13:31 suppressing KCSAN reports in functions: '__mod_timer' 'do_epoll_ctl' 'ext4_mb_find_by_goal' '__io_cqring_fill_event' 'ext4_free_inode' 'tomoyo_domain_quota_is_ok' 'blk_mq_rq_ctx_init' 'wbt_done' '__xa_clear_mark' 'ext4_writepages' '__mark_inode_dirty' 'ext4_free_inodes_count' 'ext4_ext_try_to_merge_right' 'generic_write_end' 'futex_wait_queue_me' 'alloc_pid' 'caching_thread' 'find_get_pages_range_tag' '__ext4_new_inode' 'do_sys_poll' 'exit_mm' syzkaller login: [ 41.079515][ T8445] ================================================================== [ 41.087666][ T8445] BUG: KCSAN: data-race in __delayacct_blkio_end / __delayacct_blkio_start [ 41.096213][ T8445] [ 41.098515][ T8445] write to 0xffff8881015c9198 of 8 bytes by task 8436 on cpu 1: [ 41.106115][ T8445] __delayacct_blkio_start+0x35/0x40 [ 41.111465][ T8445] __schedule+0x18c/0x550 [ 41.115762][ T8445] schedule+0x7f/0xb0 [ 41.119713][ T8445] io_schedule+0x3b/0x50 [ 41.123933][ T8445] wait_on_page_bit_common+0x633/0x910 [ 41.129370][ T8445] filemap_fault+0x87a/0x12e0 [ 41.134038][ T8445] ext4_filemap_fault+0x4b/0x60 [ 41.138858][ T8445] do_read_fault+0x403/0x760 [ 41.143561][ T8445] handle_mm_fault+0xfeb/0x1770 [ 41.148387][ T8445] do_user_addr_fault+0x33e/0x730 [ 41.153382][ T8445] exc_page_fault+0x91/0x290 [ 41.157976][ T8445] asm_exc_page_fault+0x1e/0x30 [ 41.162795][ T8445] [ 41.165138][ T8445] read to 0xffff8881015c9198 of 8 bytes by task 8445 on cpu 0: [ 41.172654][ T8445] __delayacct_blkio_end+0x70/0xf0 [ 41.177736][ T8445] try_to_wake_up+0x107/0x470 [ 41.182428][ T8445] wake_page_function+0xd9/0x200 [ 41.187336][ T8445] __wake_up_common+0xbc/0x130 [ 41.192070][ T8445] wake_up_page_bit+0xa4/0x190 [ 41.196799][ T8445] filemap_map_pages+0x5ad/0x9a0 [ 41.201706][ T8445] do_read_fault+0x233/0x760 [ 41.206264][ T8445] handle_mm_fault+0xfeb/0x1770 [ 41.211085][ T8445] do_user_addr_fault+0x33e/0x730 [ 41.216077][ T8445] exc_page_fault+0x91/0x290 [ 41.220635][ T8445] asm_exc_page_fault+0x1e/0x30 [ 41.225447][ T8445] [ 41.227743][ T8445] Reported by Kernel Concurrency Sanitizer on: [ 41.233865][ T8445] CPU: 0 PID: 8445 Comm: syz-fuzzer Not tainted 5.10.0-rc4-syzkaller #0 [ 41.242241][ T8445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.252266][ T8445] ================================================================== [ 41.260296][ T8445] Kernel panic - not syncing: panic_on_warn set ... [ 41.266852][ T8445] CPU: 0 PID: 8445 Comm: syz-fuzzer Not tainted 5.10.0-rc4-syzkaller #0 [ 41.275138][ T8445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.285162][ T8445] Call Trace: [ 41.288424][ T8445] dump_stack+0x116/0x15d [ 41.292726][ T8445] panic+0x1e7/0x5fa [ 41.296596][ T8445] ? vprintk_emit+0x2f2/0x370 [ 41.301242][ T8445] kcsan_report+0x67b/0x680 [ 41.305713][ T8445] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 41.311240][ T8445] ? __delayacct_blkio_end+0x70/0xf0 [ 41.316495][ T8445] ? try_to_wake_up+0x107/0x470 [ 41.321328][ T8445] ? wake_page_function+0xd9/0x200 [ 41.326406][ T8445] ? __wake_up_common+0xbc/0x130 [ 41.331311][ T8445] ? wake_up_page_bit+0xa4/0x190 [ 41.336216][ T8445] ? filemap_map_pages+0x5ad/0x9a0 [ 41.341292][ T8445] ? do_read_fault+0x233/0x760 [ 41.346025][ T8445] ? handle_mm_fault+0xfeb/0x1770 [ 41.351030][ T8445] ? do_user_addr_fault+0x33e/0x730 [ 41.356195][ T8445] ? exc_page_fault+0x91/0x290 [ 41.360926][ T8445] ? asm_exc_page_fault+0x1e/0x30 [ 41.365923][ T8445] ? __rcu_read_unlock+0x51/0x220 [ 41.370928][ T8445] kcsan_setup_watchpoint+0x46a/0x4d0 [ 41.376272][ T8445] __delayacct_blkio_end+0x70/0xf0 [ 41.381355][ T8445] try_to_wake_up+0x107/0x470 [ 41.386001][ T8445] wake_page_function+0xd9/0x200 [ 41.390919][ T8445] __wake_up_common+0xbc/0x130 [ 41.395653][ T8445] wake_up_page_bit+0xa4/0x190 [ 41.400386][ T8445] filemap_map_pages+0x5ad/0x9a0 [ 41.405291][ T8445] do_read_fault+0x233/0x760 [ 41.409860][ T8445] handle_mm_fault+0xfeb/0x1770 [ 41.414681][ T8445] do_user_addr_fault+0x33e/0x730 [ 41.419675][ T8445] exc_page_fault+0x91/0x290 [ 41.424232][ T8445] ? asm_exc_page_fault+0x8/0x30 [ 41.429138][ T8445] asm_exc_page_fault+0x1e/0x30 [ 41.433957][ T8445] RIP: 0033:0x41f64a [ 41.437835][ T8445] 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 [ 41.457409][ T8445] RSP: 002b:000000c00004be20 EFLAGS: 00010283 [ 41.463454][ T8445] RAX: 00007f9f58e9f000 RBX: 0000000000000041 RCX: 0000000000040000 [ 41.471404][ T8445] RDX: 00000000014a2280 RSI: 000000000002cd80 RDI: 0000000000000000 [ 41.479428][ T8445] RBP: 000000c00004be70 R08: 00000000014cf000 R09: 0000000000000010 [ 41.487368][ T8445] R10: 00007f9f7fb154a0 R11: 0000000000000049 R12: 0000000000000003 [ 41.495308][ T8445] R13: 000000c000298780 R14: 000000000000000f R15: 00000000000014db [ 41.504004][ T8445] Kernel Offset: disabled [ 41.508307][ T8445] Rebooting in 86400 seconds..