[ 35.841769] audit: type=1800 audit(1538817773.265:30): pid=5690 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.963608] kauditd_printk_skb: 4 callbacks suppressed [ 40.963622] audit: type=1400 audit(1538817778.405:35): avc: denied { map } for pid=5866 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. executing program [ 47.476008] audit: type=1400 audit(1538817784.915:36): avc: denied { map } for pid=5878 comm="syz-executor101" path="/root/syz-executor101031937" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 47.479387] kasan: CONFIG_KASAN_INLINE enabled [ 47.506949] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.514370] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.520585] CPU: 1 PID: 5878 Comm: syz-executor101 Not tainted 4.19.0-rc6+ #49 [ 47.527930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.537263] RIP: 0010:rb_erase+0x306/0x3710 [ 47.541566] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 47.560445] RSP: 0018:ffff8801c3016918 EFLAGS: 00010202 [ 47.565784] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.573028] RDX: 1ffff10038602d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 47.580273] RBP: ffff8801c3017320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 47.587522] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801bc862930 [ 47.594766] R13: dffffc0000000000 R14: ffff8801c30172f8 R15: ffff8801c3017438 [ 47.602011] FS: 00000000017fd880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 47.610212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.616071] CR2: 0000000020000040 CR3: 00000001c252a000 CR4: 00000000001406e0 [ 47.623322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.630590] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.637834] Call Trace: [ 47.640439] ? rb_insert_color+0x1460/0x1460 [ 47.644827] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 47.649561] ? is_bpf_text_address+0xac/0x170 [ 47.654033] ? mark_held_locks+0x130/0x130 [ 47.658263] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.664054] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.669569] ? mark_page_accessed+0xcb0/0x2040 [ 47.674134] ? activate_page+0x1040/0x1040 [ 47.678346] ? mark_held_locks+0x130/0x130 [ 47.682561] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.688076] ? mark_held_locks+0x130/0x130 [ 47.692294] ? mark_page_accessed+0xcb0/0x2040 [ 47.696848] ? activate_page+0x1040/0x1040 [ 47.701068] ? activate_page+0x1040/0x1040 [ 47.705291] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.710290] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 47.715021] ? is_bpf_text_address+0xac/0x170 [ 47.719492] ? lock_downgrade+0x900/0x900 [ 47.723757] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.729529] ? mark_held_locks+0x130/0x130 [ 47.733745] ? depot_save_stack+0x292/0x470 [ 47.738445] ? mark_held_locks+0x130/0x130 [ 47.742655] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 47.747992] ? lock_downgrade+0x900/0x900 [ 47.752114] ? kasan_check_read+0x11/0x20 [ 47.756237] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.760619] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.765175] ? mark_held_locks+0x130/0x130 [ 47.769384] ? _raw_spin_unlock+0x2c/0x50 [ 47.773507] ? ext4_discard_preallocations+0x18a/0x13c0 [ 47.778864] ? trace_hardirqs_on+0xbd/0x310 [ 47.783163] ? ext4_exit_mballoc+0xc0/0xc0 [ 47.787372] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.792363] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 47.797094] ? modules_open+0xa0/0xa0 [ 47.800870] ? __es_tree_search.isra.12+0x1ba/0x220 [ 47.805861] ? __es_remove_extent+0x9a3/0xba0 [ 47.810331] ? mark_held_locks+0x130/0x130 [ 47.814561] ? lock_downgrade+0x900/0x900 [ 47.818688] ? ext4_es_scan+0x960/0x960 [ 47.822639] ? lock_release+0x970/0x970 [ 47.826590] ? trace_hardirqs_on+0xbd/0x310 [ 47.830885] ? kasan_check_read+0x11/0x20 [ 47.835010] ? clear_inode+0x114/0x3a0 [ 47.838873] ? do_raw_write_trylock+0x1c0/0x1c0 [ 47.843519] ? kasan_check_write+0x14/0x20 [ 47.847729] ? lock_acquire+0x1ed/0x520 [ 47.851677] ? integrity_inode_free+0x77/0x320 [ 47.856235] ? ext4_es_remove_extent+0x151/0x500 [ 47.860965] ? lock_release+0x970/0x970 [ 47.864936] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 47.870015] ? depot_save_stack+0x292/0x470 [ 47.874313] ? kasan_check_write+0x14/0x20 [ 47.878527] ? do_raw_write_lock+0xbd/0x1b0 [ 47.882828] integrity_inode_free+0x12f/0x320 [ 47.887304] security_inode_free+0x19/0x90 [ 47.891524] __destroy_inode+0x328/0x820 [ 47.895717] ? generic_update_time+0x450/0x450 [ 47.900286] ? evict+0x5d8/0x980 [ 47.903636] ? lock_downgrade+0x900/0x900 [ 47.907761] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.912933] destroy_inode+0xda/0x200 [ 47.916712] ? __destroy_inode+0x820/0x820 [ 47.921061] ? kasan_check_write+0x14/0x20 [ 47.925284] ? do_raw_spin_lock+0xc1/0x200 [ 47.929502] evict+0x5e0/0x980 [ 47.932695] ? jbd2_journal_stop+0x430/0x15d0 [ 47.937163] ? destroy_inode+0x200/0x200 [ 47.941199] ? do_raw_spin_lock+0xc1/0x200 [ 47.945406] ? iput+0x671/0xa90 [ 47.948657] ? lock_downgrade+0x900/0x900 [ 47.952783] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.958295] ? kasan_check_read+0x11/0x20 [ 47.962586] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.967149] ? lock_downgrade+0x900/0x900 [ 47.971280] ? ext4_ioctl+0x231b/0x4210 [ 47.975233] iput+0x679/0xa90 [ 47.978368] ? inode_add_lru+0x2a0/0x2a0 [ 47.982556] ? up_write+0x7b/0x220 [ 47.986071] ? up_read+0x110/0x110 [ 47.989587] ? up_read+0x110/0x110 [ 47.993105] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.998617] ? check_preemption_disabled+0x48/0x200 [ 48.003612] ext4_ioctl+0x236f/0x4210 [ 48.007389] ? ext4_ioctl_group_add+0x560/0x560 [ 48.012042] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.017957] ? kasan_check_read+0x11/0x20 [ 48.022085] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.027358] ? unwind_dump+0x190/0x190 [ 48.031223] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.036739] ? avc_has_extended_perms+0xab2/0x15a0 [ 48.041653] ? fpu__prepare_read+0x17/0x750 [ 48.045952] ? avc_ss_reset+0x190/0x190 [ 48.049902] ? save_stack+0xa9/0xd0 [ 48.053504] ? save_stack+0x43/0xd0 [ 48.057106] ? __kasan_slab_free+0x102/0x150 [ 48.061969] ? kasan_slab_free+0xe/0x10 [ 48.065930] ? kmem_cache_free+0x83/0x290 [ 48.070058] ? putname+0xf2/0x130 [ 48.073486] ? do_sys_open+0x54d/0x700 [ 48.077350] ? __x64_sys_openat+0x9d/0x100 [ 48.081562] ? do_syscall_64+0x1b9/0x820 [ 48.085605] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.091099] ? trace_hardirqs_off+0xb8/0x310 [ 48.095501] ? kasan_check_read+0x11/0x20 [ 48.099628] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.104015] ? ___might_sleep+0x1ed/0x300 [ 48.108143] ? arch_local_save_flags+0x40/0x40 [ 48.112703] ? kasan_check_write+0x14/0x20 [ 48.116936] ? trace_hardirqs_off+0xb8/0x310 [ 48.121323] ? ext4_ioctl_group_add+0x560/0x560 [ 48.125975] do_vfs_ioctl+0x1de/0x1720 [ 48.129845] ? ioctl_preallocate+0x300/0x300 [ 48.134235] ? selinux_file_mprotect+0x620/0x620 [ 48.138971] ? putname+0xf2/0x130 [ 48.142409] ? kmem_cache_free+0x21a/0x290 [ 48.146634] ? putname+0xf7/0x130 [ 48.150082] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.155606] ? security_file_ioctl+0x94/0xc0 [ 48.159990] ksys_ioctl+0xa9/0xd0 [ 48.163420] __x64_sys_ioctl+0x73/0xb0 [ 48.167288] do_syscall_64+0x1b9/0x820 [ 48.171412] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.176759] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.181666] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.186486] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.191486] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.196486] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.201500] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.206333] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.211509] RIP: 0033:0x440029 [ 48.214684] 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 [ 48.233561] RSP: 002b:00007ffc89acfc68 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 48.241249] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 48.248495] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 48.255749] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 48.262996] R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004018b0 [ 48.270485] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 48.277735] Modules linked in: [ 48.280984] ---[ end trace f3e6430b34002f6b ]--- [ 48.285811] RIP: 0010:rb_erase+0x306/0x3710 [ 48.290108] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 48.309099] RSP: 0018:ffff8801c3016918 EFLAGS: 00010202 [ 48.314465] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.321730] RDX: 1ffff10038602d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.329002] RBP: ffff8801c3017320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 48.336274] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801bc862930 [ 48.343543] R13: dffffc0000000000 R14: ffff8801c30172f8 R15: ffff8801c3017438 [ 48.350795] FS: 00000000017fd880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.359022] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.365124] CR2: 0000000020000040 CR3: 00000001c252a000 CR4: 00000000001406e0 [ 48.372407] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.379664] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.386935] Kernel panic - not syncing: Fatal exception [ 48.393375] Kernel Offset: disabled [ 48.396988] Rebooting in 86400 seconds..