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 '10.128.0.59' (ECDSA) to the list of known hosts. 2018/04/05 15:58:14 parsed 1 programs 2018/04/05 15:58:14 executed programs: 0 syzkaller login: [ 30.635871] IPVS: ftp: loaded support on port[0] = 21 [ 31.587104] ================================================================== [ 31.594576] BUG: KASAN: slab-out-of-bounds in strlen+0x91/0xa0 [ 31.600526] Read of size 1 at addr ffff8801ac7eb680 by task syz-executor0/4520 [ 31.607859] [ 31.609469] CPU: 0 PID: 4520 Comm: syz-executor0 Not tainted 4.16.0+ #1 [ 31.616297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.625631] Call Trace: [ 31.628196] dump_stack+0x1b9/0x29f [ 31.631800] ? arch_local_irq_restore+0x52/0x52 [ 31.636446] ? printk+0x9e/0xba [ 31.639701] ? show_regs_print_info+0x18/0x18 [ 31.644183] ? kasan_check_write+0x14/0x20 [ 31.648396] print_address_description+0x6c/0x20b [ 31.653217] ? strlen+0x91/0xa0 [ 31.656477] kasan_report.cold.7+0xac/0x2f5 [ 31.660927] __asan_report_load1_noabort+0x14/0x20 [ 31.665839] strlen+0x91/0xa0 [ 31.668930] getname_kernel+0x24/0x370 [ 31.672794] kern_path+0x1e/0x40 [ 31.676148] create_local_trace_uprobe+0x96/0x6e0 [ 31.681154] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 31.686155] ? alloc_symbol_cache+0x10/0x10 [ 31.690471] ? mpi_free.cold.1+0x19/0x19 [ 31.694519] perf_uprobe_init+0x189/0x260 [ 31.698649] perf_uprobe_event_init+0xdb/0x160 [ 31.703210] perf_try_init_event+0x137/0x2f0 [ 31.707596] perf_event_alloc.part.91+0x1920/0x30a0 [ 31.712592] ? debug_check_no_locks_freed+0x310/0x310 [ 31.717761] ? find_get_context.isra.92+0x720/0x720 [ 31.722752] ? debug_check_no_locks_freed+0x310/0x310 [ 31.727938] ? kasan_check_write+0x14/0x20 [ 31.732148] ? __mutex_lock+0x7d9/0x17f0 [ 31.736184] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 31.741324] ? expand_files.part.8+0x56f/0x9a0 [ 31.745899] ? SYSC_perf_event_open+0x129f/0x2fa0 [ 31.750906] ? find_held_lock+0x36/0x1c0 [ 31.754951] ? mutex_trylock+0x2a0/0x2a0 [ 31.760320] ? lock_downgrade+0x8e0/0x8e0 [ 31.764492] ? kasan_check_read+0x11/0x20 [ 31.769068] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.773995] ? graph_lock+0x170/0x170 [ 31.777867] ? graph_lock+0x170/0x170 [ 31.781914] ? _raw_spin_unlock+0x22/0x30 [ 31.786106] ? __alloc_fd+0x544/0x6e0 [ 31.789917] ? find_held_lock+0x36/0x1c0 [ 31.793992] ? lock_downgrade+0x8e0/0x8e0 [ 31.798163] ? kasan_check_read+0x11/0x20 [ 31.804936] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.809398] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.814005] ? ptrace_getsiginfo+0x190/0x190 [ 31.818444] ? kasan_check_write+0x14/0x20 [ 31.822878] ? do_raw_spin_lock+0xc1/0x200 [ 31.827151] SYSC_perf_event_open+0xa8a/0x2fa0 [ 31.831749] ? perf_event_set_output+0x660/0x660 [ 31.836518] ? find_held_lock+0x36/0x1c0 [ 31.840596] ? kasan_check_read+0x11/0x20 [ 31.844765] ? do_raw_spin_unlock+0x9e/0x2e0 [ 31.849157] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 31.853734] SyS_perf_event_open+0x35/0x40 [ 31.857960] ? perf_bp_event+0x2b0/0x2b0 [ 31.862010] do_syscall_64+0x29e/0x9d0 [ 31.865878] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.870352] ? finish_task_switch+0x1ca/0x820 [ 31.874830] ? syscall_return_slowpath+0x5c0/0x5c0 [ 31.879740] ? syscall_return_slowpath+0x30f/0x5c0 [ 31.884657] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 31.890004] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.894830] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.900014] RIP: 0033:0x4552d9 [ 31.903182] RSP: 002b:00007f1ec591fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 31.910911] RAX: ffffffffffffffda RBX: 00007f1ec59206d4 RCX: 00000000004552d9 [ 31.918163] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002000a000 [ 31.925576] RBP: 000000000072c010 R08: 0000000000000000 R09: 0000000000000000 [ 31.932829] R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff [ 31.940079] R13: 0000000000000458 R14: 00000000006f98e0 R15: 0000000000000002 [ 31.947335] [ 31.948938] Allocated by task 4520: [ 31.952548] save_stack+0x43/0xd0 [ 31.955976] kasan_kmalloc+0xc4/0xe0 [ 31.959669] kmem_cache_alloc_trace+0x152/0x780 [ 31.964314] perf_uprobe_init+0x97/0x260 [ 31.968362] perf_uprobe_event_init+0xdb/0x160 [ 31.972920] perf_try_init_event+0x137/0x2f0 [ 31.977304] perf_event_alloc.part.91+0x1920/0x30a0 [ 31.982298] SYSC_perf_event_open+0xa8a/0x2fa0 [ 31.986855] SyS_perf_event_open+0x35/0x40 [ 31.991068] do_syscall_64+0x29e/0x9d0 [ 31.994940] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.000106] [ 32.001712] Freed by task 2931: [ 32.004975] save_stack+0x43/0xd0 [ 32.008407] __kasan_slab_free+0x11a/0x170 [ 32.012620] kasan_slab_free+0xe/0x10 [ 32.016400] kfree+0xd9/0x260 [ 32.019486] kvfree+0x61/0x70 [ 32.022571] single_release+0x78/0xb0 [ 32.026347] close_pdeo.part.2+0x11e/0x420 [ 32.030556] close_pdeo+0x173/0x1e0 [ 32.034158] proc_reg_release+0x11b/0x150 [ 32.038284] __fput+0x34d/0x890 [ 32.041542] ____fput+0x15/0x20 [ 32.044811] task_work_run+0x1e4/0x290 [ 32.048678] exit_to_usermode_loop+0x2bd/0x310 [ 32.053244] do_syscall_64+0x792/0x9d0 [ 32.057112] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.062273] [ 32.063885] The buggy address belongs to the object at ffff8801ac7ea680 [ 32.063885] which belongs to the cache kmalloc-4096 of size 4096 [ 32.076699] The buggy address is located 0 bytes to the right of [ 32.076699] 4096-byte region [ffff8801ac7ea680, ffff8801ac7eb680) [ 32.088985] The buggy address belongs to the page: [ 32.093894] page:ffffea0006b1fa80 count:1 mapcount:0 mapping:ffff8801ac7ea680 index:0x0 compound_mapcount: 0 [ 32.103843] flags: 0x2fffc0000008100(slab|head) [ 32.108495] raw: 02fffc0000008100 ffff8801ac7ea680 0000000000000000 0000000100000001 [ 32.116356] raw: ffffea0006b04e20 ffff8801dac01a48 ffff8801dac00dc0 0000000000000000 [ 32.124220] page dumped because: kasan: bad access detected [ 32.129903] [ 32.131506] Memory state around the buggy address: [ 32.136413] ffff8801ac7eb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.143750] ffff8801ac7eb600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.151095] >ffff8801ac7eb680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.158955] ^ [ 32.162299] ffff8801ac7eb700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.169634] ffff8801ac7eb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.176964] ================================================================== [ 32.184304] Disabling lock debugging due to kernel taint [ 32.189848] Kernel panic - not syncing: panic_on_warn set ... [ 32.189848] [ 32.197203] CPU: 0 PID: 4520 Comm: syz-executor0 Tainted: G B 4.16.0+ #1 [ 32.205500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.214840] Call Trace: [ 32.217419] dump_stack+0x1b9/0x29f [ 32.221035] ? arch_local_irq_restore+0x52/0x52 [ 32.225682] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.230513] ? strcat+0xe0/0x140 [ 32.233866] panic+0x22f/0x4de [ 32.237044] ? add_taint.cold.5+0x16/0x16 [ 32.241181] ? do_raw_spin_unlock+0x9e/0x2e0 [ 32.245568] ? do_raw_spin_unlock+0x9e/0x2e0 [ 32.249955] ? strlen+0x91/0xa0 [ 32.253211] kasan_end_report+0x47/0x4f [ 32.257164] kasan_report.cold.7+0xc9/0x2f5 [ 32.261465] __asan_report_load1_noabort+0x14/0x20 [ 32.266371] strlen+0x91/0xa0 [ 32.269457] getname_kernel+0x24/0x370 [ 32.273323] kern_path+0x1e/0x40 [ 32.276674] create_local_trace_uprobe+0x96/0x6e0 [ 32.281496] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 32.286495] ? alloc_symbol_cache+0x10/0x10 [ 32.290796] ? mpi_free.cold.1+0x19/0x19 [ 32.294839] perf_uprobe_init+0x189/0x260 [ 32.298971] perf_uprobe_event_init+0xdb/0x160 [ 32.303535] perf_try_init_event+0x137/0x2f0 [ 32.307944] perf_event_alloc.part.91+0x1920/0x30a0 [ 32.312953] ? debug_check_no_locks_freed+0x310/0x310 [ 32.318147] ? find_get_context.isra.92+0x720/0x720 [ 32.323227] ? debug_check_no_locks_freed+0x310/0x310 [ 32.328398] ? kasan_check_write+0x14/0x20 [ 32.332615] ? __mutex_lock+0x7d9/0x17f0 [ 32.336656] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.341649] ? expand_files.part.8+0x56f/0x9a0 [ 32.346209] ? SYSC_perf_event_open+0x129f/0x2fa0 [ 32.351032] ? find_held_lock+0x36/0x1c0 [ 32.355075] ? mutex_trylock+0x2a0/0x2a0 [ 32.359123] ? lock_downgrade+0x8e0/0x8e0 [ 32.363254] ? kasan_check_read+0x11/0x20 [ 32.367384] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 32.371959] ? graph_lock+0x170/0x170 [ 32.375757] ? graph_lock+0x170/0x170 [ 32.379554] ? _raw_spin_unlock+0x22/0x30 [ 32.383695] ? __alloc_fd+0x544/0x6e0 [ 32.387487] ? find_held_lock+0x36/0x1c0 [ 32.391531] ? lock_downgrade+0x8e0/0x8e0 [ 32.395663] ? kasan_check_read+0x11/0x20 [ 32.399789] ? do_raw_spin_unlock+0x9e/0x2e0 [ 32.404178] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 32.408740] ? ptrace_getsiginfo+0x190/0x190 [ 32.413127] ? kasan_check_write+0x14/0x20 [ 32.417341] ? do_raw_spin_lock+0xc1/0x200 [ 32.421560] SYSC_perf_event_open+0xa8a/0x2fa0 [ 32.426165] ? perf_event_set_output+0x660/0x660 [ 32.430909] ? find_held_lock+0x36/0x1c0 [ 32.434954] ? kasan_check_read+0x11/0x20 [ 32.439079] ? do_raw_spin_unlock+0x9e/0x2e0 [ 32.443484] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 32.448058] SyS_perf_event_open+0x35/0x40 [ 32.452293] ? perf_bp_event+0x2b0/0x2b0 [ 32.456337] do_syscall_64+0x29e/0x9d0 [ 32.460207] ? _raw_spin_unlock_irq+0x27/0x70 [ 32.464682] ? finish_task_switch+0x1ca/0x820 [ 32.469165] ? syscall_return_slowpath+0x5c0/0x5c0 [ 32.474074] ? syscall_return_slowpath+0x30f/0x5c0 [ 32.478983] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 32.484333] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.489158] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.494326] RIP: 0033:0x4552d9 [ 32.497491] RSP: 002b:00007f1ec591fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 32.505175] RAX: ffffffffffffffda RBX: 00007f1ec59206d4 RCX: 00000000004552d9 [ 32.512421] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002000a000 [ 32.519667] RBP: 000000000072c010 R08: 0000000000000000 R09: 0000000000000000 [ 32.526913] R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff [ 32.534176] R13: 0000000000000458 R14: 00000000006f98e0 R15: 0000000000000002 [ 32.541829] Dumping ftrace buffer: [ 32.545351] (ftrace buffer empty) [ 32.549044] Kernel Offset: disabled [ 32.552645] Rebooting in 86400 seconds..