[info] Using makefile-style concurrent boot in runlevel 2. [ 25.239582] audit: type=1800 audit(1539489048.199:21): pid=5221 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] 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 '10.128.0.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.712339] ================================================================== [ 37.719843] BUG: KASAN: slab-out-of-bounds in fscache_alloc_cookie+0x7ad/0x880 [ 37.727202] Read of size 4 at addr ffff8801da80cd54 by task syz-executor181/5376 [ 37.734790] [ 37.736423] CPU: 1 PID: 5376 Comm: syz-executor181 Not tainted 4.19.0-rc7+ #59 [ 37.743763] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.753164] Call Trace: [ 37.755763] dump_stack+0x1c4/0x2b4 [ 37.759385] ? dump_stack_print_info.cold.2+0x52/0x52 [ 37.764564] ? printk+0xa7/0xcf [ 37.767832] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 37.772636] print_address_description.cold.8+0x9/0x1ff [ 37.778002] kasan_report.cold.9+0x242/0x309 [ 37.782401] ? fscache_alloc_cookie+0x7ad/0x880 [ 37.787109] __asan_report_load4_noabort+0x14/0x20 [ 37.792042] fscache_alloc_cookie+0x7ad/0x880 [ 37.796539] ? fscache_cookie_init_once+0x80/0x80 [ 37.801377] ? rpcauth_cache_shrink_scan+0x180/0x180 [ 37.806474] ? __kmalloc_track_caller+0x14a/0x750 [ 37.811306] ? kstrdup+0x39/0x70 [ 37.814658] ? nfs_alloc_client+0x383/0x760 [ 37.818970] ? nfs_get_client+0x8e8/0x14d0 [ 37.823197] ? nfs_init_server+0x357/0x1010 [ 37.827506] ? nfs_create_server+0x86/0x5f0 [ 37.831884] ? nfs_fs_mount+0x17f8/0x2f1c [ 37.836037] ? mount_fs+0xae/0x31d [ 37.839569] ? vfs_kern_mount.part.35+0xdc/0x4f0 [ 37.844357] ? do_mount+0x581/0x31f0 [ 37.848066] ? ksys_mount+0x12d/0x140 [ 37.851850] ? __x64_sys_mount+0xbe/0x150 [ 37.855987] ? do_syscall_64+0x1b9/0x820 [ 37.860049] __fscache_acquire_cookie+0x230/0xb60 [ 37.864886] ? fscache_cookie_put+0x880/0x880 [ 37.869374] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.874899] ? check_preemption_disabled+0x48/0x200 [ 37.879988] ? rcu_lockdep_current_cpu_online+0x1f0/0x2d0 [ 37.885527] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.890793] ? rcu_pm_notify+0xc0/0xc0 [ 37.894671] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.900258] nfs_fscache_get_client_cookie+0x463/0x600 [ 37.905542] ? nfs_readpage_from_fscache_complete+0x200/0x200 [ 37.911428] nfs_alloc_client+0x563/0x760 [ 37.915574] ? register_nfs_version+0x280/0x280 [ 37.920244] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.924834] nfs_get_client+0x8e8/0x14d0 [ 37.928888] ? kmem_cache_alloc_trace+0x152/0x750 [ 37.933780] ? mount_fs+0xae/0x31d [ 37.937334] ? nfs_put_client+0x30/0x30 [ 37.941305] ? nfs_alloc_server+0x5ca/0x730 [ 37.945620] ? depot_save_stack+0x292/0x470 [ 37.949933] ? nfs_wait_client_init_complete+0x210/0x210 [ 37.955421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.960957] ? check_preemption_disabled+0x48/0x200 [ 37.965962] ? check_preemption_disabled+0x48/0x200 [ 37.970965] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 37.976144] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 37.981151] nfs_init_server+0x357/0x1010 [ 37.985341] ? nfs_clone_server+0x920/0x920 [ 37.989661] ? nfs_alloc_fattr+0x48/0x1d0 [ 37.993843] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.998868] nfs_create_server+0x86/0x5f0 [ 38.003012] nfs_try_mount+0x180/0xa80 [ 38.006893] ? lock_downgrade+0x900/0x900 [ 38.011028] ? nfs_request_mount.constprop.18+0x920/0x920 [ 38.016557] ? kasan_check_read+0x11/0x20 [ 38.020703] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.025100] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.029672] ? kasan_check_write+0x14/0x20 [ 38.033896] ? do_raw_spin_lock+0xc1/0x200 [ 38.038124] ? _raw_spin_unlock+0x2c/0x50 [ 38.042264] ? find_nfs_version+0x138/0x190 [ 38.046679] nfs_fs_mount+0x17f8/0x2f1c [ 38.050649] ? nfs_show_options+0x250/0x250 [ 38.054959] ? nfs_clone_super+0x420/0x420 [ 38.059190] ? nfs_parse_mount_options+0x2660/0x2660 [ 38.064287] ? lock_downgrade+0x900/0x900 [ 38.068426] mount_fs+0xae/0x31d [ 38.071782] ? digsig_verify+0x1530/0x1530 [ 38.076011] vfs_kern_mount.part.35+0xdc/0x4f0 [ 38.080581] ? may_umount+0xb0/0xb0 [ 38.084198] ? _raw_read_unlock+0x2c/0x50 [ 38.088417] ? __get_fs_type+0x97/0xc0 [ 38.092302] do_mount+0x581/0x31f0 [ 38.095850] ? copy_mount_string+0x40/0x40 [ 38.100089] ? copy_mount_options+0x5f/0x380 [ 38.104491] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.109501] ? kmem_cache_alloc_trace+0x353/0x750 [ 38.114335] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.119942] ? _copy_from_user+0xdf/0x150 [ 38.124088] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.129617] ? copy_mount_options+0x288/0x380 [ 38.134103] ksys_mount+0x12d/0x140 [ 38.137729] __x64_sys_mount+0xbe/0x150 [ 38.141697] do_syscall_64+0x1b9/0x820 [ 38.145569] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.150921] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.155845] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.160693] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.165706] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.170726] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.175745] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.180590] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.185767] RIP: 0033:0x440139 [ 38.188948] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 38.207902] RSP: 002b:00007ffc64741cb8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 38.215605] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440139 [ 38.222867] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000020000040 [ 38.230128] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 38.237391] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000004019c0 [ 38.244645] R13: 0000000000401a50 R14: 0000000000000000 R15: 0000000000000000 [ 38.251910] [ 38.253523] Allocated by task 5376: [ 38.257139] save_stack+0x43/0xd0 [ 38.260580] kasan_kmalloc+0xc7/0xe0 [ 38.264277] __kmalloc+0x14e/0x760 [ 38.267805] fscache_alloc_cookie+0x6f7/0x880 [ 38.272286] __fscache_acquire_cookie+0x230/0xb60 [ 38.277115] nfs_fscache_get_client_cookie+0x463/0x600 [ 38.282375] nfs_alloc_client+0x563/0x760 [ 38.286511] nfs_get_client+0x8e8/0x14d0 [ 38.290561] nfs_init_server+0x357/0x1010 [ 38.294697] nfs_create_server+0x86/0x5f0 [ 38.298831] nfs_try_mount+0x180/0xa80 [ 38.302704] nfs_fs_mount+0x17f8/0x2f1c [ 38.306666] mount_fs+0xae/0x31d [ 38.310019] vfs_kern_mount.part.35+0xdc/0x4f0 [ 38.314580] do_mount+0x581/0x31f0 [ 38.318106] ksys_mount+0x12d/0x140 [ 38.321714] __x64_sys_mount+0xbe/0x150 [ 38.325673] do_syscall_64+0x1b9/0x820 [ 38.329545] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.334711] [ 38.336325] Freed by task 3225: [ 38.339591] save_stack+0x43/0xd0 [ 38.343025] __kasan_slab_free+0x102/0x150 [ 38.347244] kasan_slab_free+0xe/0x10 [ 38.351031] kfree+0xcf/0x230 [ 38.354123] security_inode_init_security+0x220/0x3d0 [ 38.359297] shmem_mknod+0xc9/0x1f0 [ 38.362914] shmem_create+0x2b/0x40 [ 38.366534] lookup_open+0x1319/0x1b90 [ 38.370455] path_openat+0x15e7/0x5160 [ 38.374336] do_filp_open+0x255/0x380 [ 38.378123] do_sys_open+0x568/0x700 [ 38.381903] __x64_sys_open+0x7e/0xc0 [ 38.385734] do_syscall_64+0x1b9/0x820 [ 38.389680] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.394857] [ 38.396473] The buggy address belongs to the object at ffff8801da80cd40 [ 38.396473] which belongs to the cache kmalloc-32 of size 32 [ 38.408948] The buggy address is located 20 bytes inside of [ 38.408948] 32-byte region [ffff8801da80cd40, ffff8801da80cd60) [ 38.420636] The buggy address belongs to the page: [ 38.425553] page:ffffea00076a0300 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801da80cfc1 [ 38.434990] flags: 0x2fffc0000000100(slab) [ 38.439219] raw: 02fffc0000000100 ffff8801da801248 ffffea00076a5a48 ffff8801da8001c0 [ 38.447093] raw: ffff8801da80cfc1 ffff8801da80c000 000000010000003f 0000000000000000 [ 38.454961] page dumped because: kasan: bad access detected [ 38.460656] [ 38.462270] Memory state around the buggy address: [ 38.467288] ffff8801da80cc00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 38.474838] ffff8801da80cc80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 38.482204] >ffff8801da80cd00: 00 02 fc fc fc fc fc fc 00 00 06 fc fc fc fc fc [ 38.489551] ^ [ 38.495509] ffff8801da80cd80: fb fb fb fb fc fc fc fc 00 01 fc fc fc fc fc fc [ 38.502863] ffff8801da80ce00: 00 fc fc fc fc fc fc fc 00 00 fc fc fc fc fc fc [ 38.510223] ================================================================== [ 38.518272] Disabling lock debugging due to kernel taint [ 38.523894] Kernel panic - not syncing: panic_on_warn set ... [ 38.523894] [ 38.531287] CPU: 1 PID: 5376 Comm: syz-executor181 Tainted: G B 4.19.0-rc7+ #59 [ 38.540137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.549477] Call Trace: [ 38.552058] dump_stack+0x1c4/0x2b4 [ 38.555674] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.560853] panic+0x238/0x4e7 [ 38.564042] ? add_taint.cold.5+0x16/0x16 [ 38.568192] ? preempt_schedule+0x4d/0x60 [ 38.572580] ? ___preempt_schedule+0x16/0x18 [ 38.577126] ? trace_hardirqs_on+0xb4/0x310 [ 38.581446] kasan_end_report+0x47/0x4f [ 38.585405] kasan_report.cold.9+0x76/0x309 [ 38.589716] ? fscache_alloc_cookie+0x7ad/0x880 [ 38.594682] __asan_report_load4_noabort+0x14/0x20 [ 38.599599] fscache_alloc_cookie+0x7ad/0x880 [ 38.604079] ? fscache_cookie_init_once+0x80/0x80 [ 38.608911] ? rpcauth_cache_shrink_scan+0x180/0x180 [ 38.614002] ? __kmalloc_track_caller+0x14a/0x750 [ 38.618831] ? kstrdup+0x39/0x70 [ 38.622201] ? nfs_alloc_client+0x383/0x760 [ 38.626515] ? nfs_get_client+0x8e8/0x14d0 [ 38.630736] ? nfs_init_server+0x357/0x1010 [ 38.635046] ? nfs_create_server+0x86/0x5f0 [ 38.639360] ? nfs_fs_mount+0x17f8/0x2f1c [ 38.643546] ? mount_fs+0xae/0x31d [ 38.647086] ? vfs_kern_mount.part.35+0xdc/0x4f0 [ 38.651827] ? do_mount+0x581/0x31f0 [ 38.655525] ? ksys_mount+0x12d/0x140 [ 38.659314] ? __x64_sys_mount+0xbe/0x150 [ 38.663549] ? do_syscall_64+0x1b9/0x820 [ 38.667614] __fscache_acquire_cookie+0x230/0xb60 [ 38.672452] ? fscache_cookie_put+0x880/0x880 [ 38.676951] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.682492] ? check_preemption_disabled+0x48/0x200 [ 38.687517] ? rcu_lockdep_current_cpu_online+0x1f0/0x2d0 [ 38.693037] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.698400] ? rcu_pm_notify+0xc0/0xc0 [ 38.702346] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.707980] nfs_fscache_get_client_cookie+0x463/0x600 [ 38.713766] ? nfs_readpage_from_fscache_complete+0x200/0x200 [ 38.719642] nfs_alloc_client+0x563/0x760 [ 38.723775] ? register_nfs_version+0x280/0x280 [ 38.728439] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.733147] nfs_get_client+0x8e8/0x14d0 [ 38.737299] ? kmem_cache_alloc_trace+0x152/0x750 [ 38.742133] ? mount_fs+0xae/0x31d [ 38.745664] ? nfs_put_client+0x30/0x30 [ 38.749626] ? nfs_alloc_server+0x5ca/0x730 [ 38.754043] ? depot_save_stack+0x292/0x470 [ 38.758355] ? nfs_wait_client_init_complete+0x210/0x210 [ 38.763793] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.769318] ? check_preemption_disabled+0x48/0x200 [ 38.774318] ? check_preemption_disabled+0x48/0x200 [ 38.779319] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 38.784503] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 38.789510] nfs_init_server+0x357/0x1010 [ 38.793643] ? nfs_clone_server+0x920/0x920 [ 38.798064] ? nfs_alloc_fattr+0x48/0x1d0 [ 38.802211] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.807340] nfs_create_server+0x86/0x5f0 [ 38.811478] nfs_try_mount+0x180/0xa80 [ 38.815362] ? lock_downgrade+0x900/0x900 [ 38.819506] ? nfs_request_mount.constprop.18+0x920/0x920 [ 38.825032] ? kasan_check_read+0x11/0x20 [ 38.829170] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.833576] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.838148] ? kasan_check_write+0x14/0x20 [ 38.842384] ? do_raw_spin_lock+0xc1/0x200 [ 38.846609] ? _raw_spin_unlock+0x2c/0x50 [ 38.850756] ? find_nfs_version+0x138/0x190 [ 38.855065] nfs_fs_mount+0x17f8/0x2f1c [ 38.859033] ? nfs_show_options+0x250/0x250 [ 38.863438] ? nfs_clone_super+0x420/0x420 [ 38.867667] ? nfs_parse_mount_options+0x2660/0x2660 [ 38.872763] ? lock_downgrade+0x900/0x900 [ 38.876904] mount_fs+0xae/0x31d [ 38.880258] ? digsig_verify+0x1530/0x1530 [ 38.884486] vfs_kern_mount.part.35+0xdc/0x4f0 [ 38.889066] ? may_umount+0xb0/0xb0 [ 38.892682] ? _raw_read_unlock+0x2c/0x50 [ 38.896883] ? __get_fs_type+0x97/0xc0 [ 38.900770] do_mount+0x581/0x31f0 [ 38.904308] ? copy_mount_string+0x40/0x40 [ 38.908540] ? copy_mount_options+0x5f/0x380 [ 38.912934] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.917934] ? kmem_cache_alloc_trace+0x353/0x750 [ 38.922877] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.928408] ? _copy_from_user+0xdf/0x150 [ 38.932542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.938181] ? copy_mount_options+0x288/0x380 [ 38.942661] ksys_mount+0x12d/0x140 [ 38.946281] __x64_sys_mount+0xbe/0x150 [ 38.950244] do_syscall_64+0x1b9/0x820 [ 38.954114] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.959466] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.964377] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.969208] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.974210] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.979216] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.984218] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.989051] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.994226] RIP: 0033:0x440139 [ 38.997524] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 39.016568] RSP: 002b:00007ffc64741cb8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 39.024285] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440139 [ 39.031582] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000020000040 [ 39.038842] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 39.046324] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000004019c0 [ 39.053578] R13: 0000000000401a50 R14: 0000000000000000 R15: 0000000000000000 [ 39.061810] Kernel Offset: disabled [ 39.065540] Rebooting in 86400 seconds..