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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.840076] ================================================================== [ 41.847489] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 41.853362] CPU: 1 PID: 4503 Comm: syz-executor244 Not tainted 4.16.0+ #87 [ 41.860419] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.869750] Call Trace: [ 41.872321] dump_stack+0x185/0x1d0 [ 41.875924] ? pointer+0x11e5/0x1410 [ 41.879618] kmsan_report+0x142/0x240 [ 41.883404] __msan_warning_32+0x6c/0xb0 [ 41.887445] ? proc_pid_stack+0x251/0x470 [ 41.891573] pointer+0x11e5/0x1410 [ 41.895094] ? proc_pid_stack+0x26a/0x470 [ 41.899232] vsnprintf+0xa2d/0x33c0 [ 41.902845] seq_printf+0x29f/0x420 [ 41.906461] ? save_stack_trace_tsk+0x26a/0x2f0 [ 41.911112] ? proc_pid_stack+0x26a/0x470 [ 41.915260] ? proc_pid_stack+0x26a/0x470 [ 41.919387] ? proc_pid_stack+0x26a/0x470 [ 41.923517] proc_pid_stack+0x326/0x470 [ 41.927475] proc_single_show+0x1af/0x300 [ 41.931603] ? proc_pid_wchan+0x250/0x250 [ 41.935734] ? proc_single_open+0x90/0x90 [ 41.939858] seq_read+0xc7d/0x2260 [ 41.943384] do_iter_read+0x880/0xd70 [ 41.947166] ? seq_open+0x360/0x360 [ 41.950780] vfs_readv+0x1ec/0x260 [ 41.954305] default_file_splice_read+0xa9a/0x1120 [ 41.959221] ? SYSC_tee+0x13d0/0x13d0 [ 41.963000] splice_direct_to_actor+0x4c6/0x1040 [ 41.967922] ? do_splice_direct+0x540/0x540 [ 41.972248] ? security_file_permission+0x28f/0x4b0 [ 41.977259] ? rw_verify_area+0x35e/0x580 [ 41.981390] do_splice_direct+0x335/0x540 [ 41.985521] do_sendfile+0x1067/0x1e40 [ 41.989408] SYSC_sendfile64+0x1b3/0x300 [ 41.993448] SyS_sendfile64+0x64/0x90 [ 41.997229] do_syscall_64+0x309/0x430 [ 42.001097] ? SYSC_sendfile+0x320/0x320 [ 42.005138] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.010314] RIP: 0033:0x4401d9 [ 42.013481] RSP: 002b:00007ffd50952508 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 42.021163] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 42.028408] RDX: 0000000020807000 RSI: 0000000000000004 RDI: 0000000000000005 [ 42.035653] RBP: 00000000006ca018 R08: 68742f636f72702f R09: 68742f636f72702f [ 42.042900] R10: 00000000ffffffff R11: 0000000000000217 R12: 0000000000401a60 [ 42.050154] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 42.057403] [ 42.059008] Uninit was stored to memory at: [ 42.063319] kmsan_internal_chain_origin+0x12b/0x210 [ 42.068400] __msan_chain_origin+0x69/0xc0 [ 42.072620] __save_stack_trace+0x829/0xb00 [ 42.076924] save_stack_trace_tsk+0x258/0x2f0 [ 42.081398] proc_pid_stack+0x26a/0x470 [ 42.085354] proc_single_show+0x1af/0x300 [ 42.089479] seq_read+0xc7d/0x2260 [ 42.093000] do_iter_read+0x880/0xd70 [ 42.096788] vfs_readv+0x1ec/0x260 [ 42.100309] default_file_splice_read+0xa9a/0x1120 [ 42.105218] splice_direct_to_actor+0x4c6/0x1040 [ 42.109958] do_splice_direct+0x335/0x540 [ 42.114088] do_sendfile+0x1067/0x1e40 [ 42.117961] SYSC_sendfile64+0x1b3/0x300 [ 42.122000] SyS_sendfile64+0x64/0x90 [ 42.125793] do_syscall_64+0x309/0x430 [ 42.129663] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.134836] Uninit was stored to memory at: [ 42.139147] kmsan_internal_chain_origin+0x12b/0x210 [ 42.144229] __msan_chain_origin+0x69/0xc0 [ 42.148447] update_stack_state+0x959/0xa40 [ 42.152755] unwind_next_frame+0x618/0xe50 [ 42.156971] __save_stack_trace+0x734/0xb00 [ 42.161272] save_stack_trace_tsk+0x258/0x2f0 [ 42.165751] proc_pid_stack+0x26a/0x470 [ 42.169713] proc_single_show+0x1af/0x300 [ 42.173875] seq_read+0xc7d/0x2260 [ 42.177403] do_iter_read+0x880/0xd70 [ 42.181183] vfs_readv+0x1ec/0x260 [ 42.184708] default_file_splice_read+0xa9a/0x1120 [ 42.189624] splice_direct_to_actor+0x4c6/0x1040 [ 42.194357] do_splice_direct+0x335/0x540 [ 42.198847] do_sendfile+0x1067/0x1e40 [ 42.202718] SYSC_sendfile64+0x1b3/0x300 [ 42.206761] SyS_sendfile64+0x64/0x90 [ 42.210551] do_syscall_64+0x309/0x430 [ 42.214418] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.219581] Local variable description: ----key.i.i.i@make_kgid [ 42.225620] Variable was created at: [ 42.229313] make_kgid+0x57/0x450 [ 42.232746] inode_init_always+0x32e/0xb30 [ 42.236952] ================================================================== [ 42.244285] Disabling lock debugging due to kernel taint [ 42.249710] Kernel panic - not syncing: panic_on_warn set ... [ 42.249710] [ 42.257061] CPU: 1 PID: 4503 Comm: syz-executor244 Tainted: G B 4.16.0+ #87 [ 42.265349] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.274677] Call Trace: [ 42.277245] dump_stack+0x185/0x1d0 [ 42.280849] panic+0x39d/0x940 [ 42.284042] ? pointer+0x11e5/0x1410 [ 42.287739] kmsan_report+0x238/0x240 [ 42.291519] __msan_warning_32+0x6c/0xb0 [ 42.295561] ? proc_pid_stack+0x251/0x470 [ 42.299683] pointer+0x11e5/0x1410 [ 42.303202] ? proc_pid_stack+0x26a/0x470 [ 42.307328] vsnprintf+0xa2d/0x33c0 [ 42.310934] seq_printf+0x29f/0x420 [ 42.314549] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.319195] ? proc_pid_stack+0x26a/0x470 [ 42.323321] ? proc_pid_stack+0x26a/0x470 [ 42.327458] ? proc_pid_stack+0x26a/0x470 [ 42.331588] proc_pid_stack+0x326/0x470 [ 42.335542] proc_single_show+0x1af/0x300 [ 42.339666] ? proc_pid_wchan+0x250/0x250 [ 42.343790] ? proc_single_open+0x90/0x90 [ 42.347910] seq_read+0xc7d/0x2260 [ 42.351441] do_iter_read+0x880/0xd70 [ 42.355221] ? seq_open+0x360/0x360 [ 42.358824] vfs_readv+0x1ec/0x260 [ 42.362347] default_file_splice_read+0xa9a/0x1120 [ 42.367264] ? SYSC_tee+0x13d0/0x13d0 [ 42.371047] splice_direct_to_actor+0x4c6/0x1040 [ 42.375788] ? do_splice_direct+0x540/0x540 [ 42.380094] ? security_file_permission+0x28f/0x4b0 [ 42.385092] ? rw_verify_area+0x35e/0x580 [ 42.389232] do_splice_direct+0x335/0x540 [ 42.393376] do_sendfile+0x1067/0x1e40 [ 42.397251] SYSC_sendfile64+0x1b3/0x300 [ 42.401290] SyS_sendfile64+0x64/0x90 [ 42.405066] do_syscall_64+0x309/0x430 [ 42.408931] ? SYSC_sendfile+0x320/0x320 [ 42.412980] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.418149] RIP: 0033:0x4401d9 [ 42.421317] RSP: 002b:00007ffd50952508 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 42.429002] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 42.436256] RDX: 0000000020807000 RSI: 0000000000000004 RDI: 0000000000000005 [ 42.443503] RBP: 00000000006ca018 R08: 68742f636f72702f R09: 68742f636f72702f [ 42.450748] R10: 00000000ffffffff R11: 0000000000000217 R12: 0000000000401a60 [ 42.457999] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 42.465738] Dumping ftrace buffer: [ 42.469257] (ftrace buffer empty) [ 42.472958] Kernel Offset: disabled [ 42.476560] Rebooting in 86400 seconds..