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 '10.128.0.41' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.192081] REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal [ 28.200911] REISERFS (device loop0): using ordered data mode [ 28.206933] reiserfs: using flush barriers [ 28.211738] ------------[ cut here ]------------ [ 28.216545] Please remove unsupported %/ in format string [ 28.222313] WARNING: CPU: 1 PID: 4480 at lib/vsprintf.c:2138 format_decode+0x77f/0x830 [ 28.230354] Kernel panic - not syncing: panic_on_warn set ... [ 28.230354] [ 28.237688] CPU: 1 PID: 4480 Comm: syzkaller116131 Not tainted 4.16.0-rc7+ #9 [ 28.244930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.254253] Call Trace: [ 28.256812] dump_stack+0x194/0x24d [ 28.260414] ? arch_local_irq_restore+0x53/0x53 [ 28.265057] ? vsnprintf+0x1ed/0x1900 [ 28.268830] panic+0x1e4/0x41c [ 28.271995] ? refcount_error_report+0x214/0x214 [ 28.276725] ? show_regs_print_info+0x18/0x18 [ 28.281192] ? __warn+0x1c1/0x200 [ 28.284619] ? format_decode+0x77f/0x830 [ 28.288650] __warn+0x1dc/0x200 [ 28.291901] ? format_decode+0x77f/0x830 [ 28.295933] report_bug+0x1f4/0x2b0 [ 28.299533] fixup_bug.part.10+0x37/0x80 [ 28.303565] do_error_trap+0x2d7/0x3e0 [ 28.307424] ? vprintk_default+0x28/0x30 [ 28.311455] ? math_error+0x400/0x400 [ 28.315228] ? printk+0xaa/0xca [ 28.318481] ? show_regs_print_info+0x18/0x18 [ 28.322955] ? journal_init+0x2536/0x62f0 [ 28.327084] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.331900] do_invalid_op+0x1b/0x20 [ 28.335585] invalid_op+0x1b/0x40 [ 28.339013] RIP: 0010:format_decode+0x77f/0x830 [ 28.343657] RSP: 0018:ffff8801acc7ef70 EFLAGS: 00010282 [ 28.348993] RAX: dffffc0000000008 RBX: ffffffff89e18dc1 RCX: ffffffff815b193e [ 28.356238] RDX: 0000000000000000 RSI: 1ffff1003598fd9e RDI: 1ffff1003598fd73 [ 28.363482] RBP: ffff8801acc7efb0 R08: 1ffff1003598fd35 R09: 0000000000000000 [ 28.370723] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801acc7f028 [ 28.377965] R13: 000000000000002f R14: ffffffff89e18dc0 R15: 0000000000000000 [ 28.385216] ? vprintk_func+0x5e/0xc0 [ 28.388994] vsnprintf+0x15f/0x1900 [ 28.392601] ? pointer+0x9c0/0x9c0 [ 28.396111] ? putname+0xf3/0x130 [ 28.399538] vsprintf+0x2a/0x40 [ 28.402791] prepare_error_buf+0x1ce/0x1870 [ 28.407088] ? sprintf_le_key+0x580/0x580 [ 28.411211] ? memcpy+0x45/0x50 [ 28.414466] __reiserfs_warning+0xc8/0x1a0 [ 28.418672] ? reiserfs_printk+0x110/0x110 [ 28.422881] ? _update_journal_header_block+0x570/0x570 [ 28.428215] ? vzalloc+0x45/0x50 [ 28.431552] ? reiserfs_allocate_list_bitmaps+0x5c/0x100 [ 28.436981] journal_init+0x2c9e/0x62f0 [ 28.440926] ? wake_up_klogd+0xc3/0x100 [ 28.444870] ? is_console_locked+0x20/0x20 [ 28.449079] ? console_unlock+0x5f5/0xfb0 [ 28.453199] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.458193] ? journal_release_error+0xa0/0xa0 [ 28.462745] ? wake_up_klogd+0x100/0x100 [ 28.466791] ? parse_no_kvmclock+0x10/0x20 [ 28.471000] ? __down_trylock_console_sem+0xb9/0x1e0 [ 28.476081] ? vprintk_emit+0x5b5/0xb90 [ 28.480029] ? vprintk_emit+0x5b5/0xb90 [ 28.483978] ? __down_trylock_console_sem+0x10d/0x1e0 [ 28.489150] ? vprintk_emit+0x4b5/0xb90 [ 28.493099] ? console_unlock+0xfb0/0xfb0 [ 28.497219] ? _raw_spin_unlock+0x22/0x30 [ 28.501339] ? vprintk_func+0x5e/0xc0 [ 28.505110] ? printk+0xaa/0xca [ 28.508362] ? show_regs_print_info+0x18/0x18 [ 28.512831] ? vprintk_default+0x28/0x30 [ 28.516874] ? vprintk_func+0x5e/0xc0 [ 28.520646] ? printk+0xaa/0xca [ 28.523897] ? show_regs_print_info+0x18/0x18 [ 28.528366] ? memset+0x31/0x40 [ 28.531620] ? reiserfs_fill_super+0x32c4/0x33a0 [ 28.536349] reiserfs_fill_super+0xf9f/0x33a0 [ 28.540823] ? finish_unfinished+0x1460/0x1460 [ 28.545375] ? netdev_bits+0xa0/0xa0 [ 28.549060] ? ns_test_super+0x50/0x50 [ 28.552919] ? format_decode+0x10a/0x830 [ 28.556971] ? vsnprintf+0x1ed/0x1900 [ 28.560748] ? pointer+0x9c0/0x9c0 [ 28.564262] ? cap_capable+0x1b5/0x230 [ 28.568124] ? snprintf+0xc0/0xf0 [ 28.571551] ? vsprintf+0x40/0x40 [ 28.574977] ? ns_capable_common+0xcf/0x160 [ 28.579273] ? set_blocksize+0x1f1/0x260 [ 28.583307] mount_bdev+0x2b7/0x370 [ 28.586905] ? finish_unfinished+0x1460/0x1460 [ 28.591462] get_super_block+0x34/0x40 [ 28.595322] mount_fs+0x66/0x2d0 [ 28.598664] vfs_kern_mount.part.26+0xc6/0x4a0 [ 28.603217] ? may_umount+0xa0/0xa0 [ 28.606816] ? _raw_read_unlock+0x22/0x30 [ 28.610936] ? __get_fs_type+0x8a/0xc0 [ 28.614799] do_mount+0xea4/0x2bb0 [ 28.618314] ? copy_mount_string+0x40/0x40 [ 28.622531] ? rcu_pm_notify+0xc0/0xc0 [ 28.626403] ? copy_mount_options+0x5f/0x2e0 [ 28.630794] ? rcu_read_lock_sched_held+0x108/0x120 [ 28.635791] ? kmem_cache_alloc_trace+0x459/0x740 [ 28.640618] ? kasan_check_write+0x14/0x20 [ 28.644826] ? _copy_from_user+0x99/0x110 [ 28.648953] ? copy_mount_options+0x1f7/0x2e0 [ 28.653420] SyS_mount+0xab/0x120 [ 28.656846] ? copy_mnt_ns+0xb30/0xb30 [ 28.660713] do_syscall_64+0x281/0x940 [ 28.664585] ? vmalloc_sync_all+0x30/0x30 [ 28.668712] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 28.674221] ? syscall_return_slowpath+0x550/0x550 [ 28.679123] ? syscall_return_slowpath+0x2ac/0x550 [ 28.684033] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 28.689373] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.694189] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.699352] RIP: 0033:0x442dea [ 28.702514] RSP: 002b:00007fff69379cf8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 28.710194] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442dea [ 28.717438] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff69379d00 [ 28.724681] RBP: 0000000000000004 R08: 0000000020000500 R09: 000000000000000a [ 28.731922] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401c50 [ 28.739168] R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 [ 28.746972] Dumping ftrace buffer: [ 28.750574] (ftrace buffer empty) [ 28.754256] Kernel Offset: disabled [ 28.757855] Rebooting in 86400 seconds..