INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.272169] FAULT_INJECTION: forcing a failure. [ 35.272169] name failslab, interval 1, probability 0, space 0, times 1 [ 35.283474] CPU: 1 PID: 3583 Comm: syzkaller289757 Not tainted 4.16.0+ #83 [ 35.290483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.299836] Call Trace: [ 35.302441] dump_stack+0x185/0x1d0 [ 35.306077] should_fail+0x87b/0xab0 [ 35.309787] ================================================================== [ 35.317141] BUG: KMSAN: uninit-value in kernel_text_address+0x248/0x3a0 [ 35.323876] CPU: 1 PID: 3583 Comm: syzkaller289757 Not tainted 4.16.0+ #83 [ 35.330865] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.340199] Call Trace: [ 35.342770] dump_stack+0x14a/0x1d0 [ 35.346384] ? kernel_text_address+0x248/0x3a0 [ 35.350945] kmsan_report+0x142/0x240 [ 35.354727] __msan_warning_32+0x6c/0xb0 [ 35.358767] kernel_text_address+0x248/0x3a0 [ 35.363154] __kernel_text_address+0x34/0xe0 [ 35.367593] show_trace_log_lvl+0x954/0x1030 [ 35.371996] ? should_failslab+0x279/0x2a0 [ 35.376226] show_stack+0xfc/0x150 [ 35.379760] ? print_worker_info+0x1b0/0x660 [ 35.384153] dump_stack+0x185/0x1d0 [ 35.387764] should_fail+0x87b/0xab0 [ 35.391459] should_failslab+0x279/0x2a0 [ 35.395504] kmem_cache_alloc+0x136/0xb90 [ 35.399633] ? jbd2__journal_start+0x274/0xc90 [ 35.404200] ? __msan_poison_alloca+0x15c/0x1d0 [ 35.408856] ? jbd2__journal_start+0xc8/0xc90 [ 35.413334] jbd2__journal_start+0x274/0xc90 [ 35.417724] ? rcu_all_qs+0x32/0x1f0 [ 35.421424] __ext4_journal_start_sb+0x493/0x6f0 [ 35.426161] ext4_alloc_file_blocks+0x5e4/0x1370 [ 35.430904] ? kmsan_set_origin_inline+0x6b/0x120 [ 35.435733] ext4_fallocate+0x132b/0x3790 [ 35.439861] ? __msan_poison_alloca+0x15c/0x1d0 [ 35.444508] ? _cond_resched+0x3c/0xd0 [ 35.448374] ? _cond_resched+0x3c/0xd0 [ 35.452245] ? ext4_ext_truncate+0x3b0/0x3b0 [ 35.456662] vfs_fallocate+0x9dc/0xde0 [ 35.460555] SYSC_fallocate+0x119/0x1d0 [ 35.464510] SyS_fallocate+0x64/0x90 [ 35.468203] do_syscall_64+0x309/0x430 [ 35.472077] ? vfs_fallocate+0xde0/0xde0 [ 35.476133] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 35.481301] RIP: 0033:0x445999 [ 35.484468] RSP: 002b:00007f797470dd78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 35.492154] RAX: ffffffffffffffda RBX: 00000000006dbc44 RCX: 0000000000445999 [ 35.499404] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 35.506655] RBP: 00000000006dbc40 R08: 0000000000000001 R09: 0000000000000031 [ 35.513922] R10: 0000000001000001 R11: 0000000000000246 R12: 00007f797470dd80 [ 35.521174] R13: ffffffffffffffff R14: 0000000000000005 R15: 0030656c69662f2e [ 35.528426] [ 35.530030] Local variable description: ----pvec@mpage_release_unused_pages [ 35.537108] Variable was created at: [ 35.540814] mpage_release_unused_pages+0x75/0x8f0 [ 35.545737] ext4_writepages+0x5691/0x6840 [ 35.549947] ================================================================== [ 35.557278] Disabling lock debugging due to kernel taint [ 35.562706] Kernel panic - not syncing: panic_on_warn set ... [ 35.562706] [ 35.570060] CPU: 1 PID: 3583 Comm: syzkaller289757 Tainted: G B 4.16.0+ #83 [ 35.578351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.587682] Call Trace: [ 35.590255] dump_stack+0x14a/0x1d0 [ 35.593897] panic+0x39d/0x940 [ 35.597107] ? kernel_text_address+0x248/0x3a0 [ 35.601682] kmsan_report+0x238/0x240 [ 35.605466] __msan_warning_32+0x6c/0xb0 [ 35.609509] kernel_text_address+0x248/0x3a0 [ 35.613904] __kernel_text_address+0x34/0xe0 [ 35.618294] show_trace_log_lvl+0x954/0x1030 [ 35.622685] ? should_failslab+0x279/0x2a0 [ 35.626906] show_stack+0xfc/0x150 [ 35.630425] ? print_worker_info+0x1b0/0x660 [ 35.634813] dump_stack+0x185/0x1d0 [ 35.638420] should_fail+0x87b/0xab0 [ 35.642115] should_failslab+0x279/0x2a0 [ 35.646159] kmem_cache_alloc+0x136/0xb90 [ 35.650286] ? jbd2__journal_start+0x274/0xc90 [ 35.654847] ? __msan_poison_alloca+0x15c/0x1d0 [ 35.659496] ? jbd2__journal_start+0xc8/0xc90 [ 35.663973] jbd2__journal_start+0x274/0xc90 [ 35.668362] ? rcu_all_qs+0x32/0x1f0 [ 35.672061] __ext4_journal_start_sb+0x493/0x6f0 [ 35.676799] ext4_alloc_file_blocks+0x5e4/0x1370 [ 35.681549] ? kmsan_set_origin_inline+0x6b/0x120 [ 35.686385] ext4_fallocate+0x132b/0x3790 [ 35.690514] ? __msan_poison_alloca+0x15c/0x1d0 [ 35.695161] ? _cond_resched+0x3c/0xd0 [ 35.699025] ? _cond_resched+0x3c/0xd0 [ 35.702901] ? ext4_ext_truncate+0x3b0/0x3b0 [ 35.707292] vfs_fallocate+0x9dc/0xde0 [ 35.711165] SYSC_fallocate+0x119/0x1d0 [ 35.715119] SyS_fallocate+0x64/0x90 [ 35.718817] do_syscall_64+0x309/0x430 [ 35.722688] ? vfs_fallocate+0xde0/0xde0 [ 35.726733] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 35.731902] RIP: 0033:0x445999 [ 35.735067] RSP: 002b:00007f797470dd78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 35.742767] RAX: ffffffffffffffda RBX: 00000000006dbc44 RCX: 0000000000445999 [ 35.750014] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 35.757262] RBP: 00000000006dbc40 R08: 0000000000000001 R09: 0000000000000031 [ 35.764516] R10: 0000000001000001 R11: 0000000000000246 R12: 00007f797470dd80 [ 35.771768] R13: ffffffffffffffff R14: 0000000000000005 R15: 0030656c69662f2e [ 35.779531] Dumping ftrace buffer: [ 35.783064] (ftrace buffer empty) [ 35.786763] Kernel Offset: disabled [ 35.790366] Rebooting in 86400 seconds..