[ 36.321746] audit: type=1800 audit(1539254419.086:30): pid=5672 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.958878] kauditd_printk_skb: 4 callbacks suppressed [ 40.958890] audit: type=1400 audit(1539254423.736:35): avc: denied { map } for pid=5848 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 '10.128.0.93' (ECDSA) to the list of known hosts. executing program [ 47.366073] audit: type=1400 audit(1539254430.146:36): avc: denied { map } for pid=5860 comm="syz-executor023" path="/root/syz-executor023807975" 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 [ 47.369979] kasan: CONFIG_KASAN_INLINE enabled [ 47.397676] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.405120] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.411339] CPU: 0 PID: 5860 Comm: syz-executor023 Not tainted 4.19.0-rc7+ #57 [ 47.418673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.428020] RIP: 0010:rb_erase+0x306/0x3710 [ 47.432323] 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 [ 47.451205] RSP: 0018:ffff8801bb1ce918 EFLAGS: 00010202 [ 47.456555] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.463805] RDX: 1ffff10037639d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 47.471055] RBP: ffff8801bb1cf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 47.478304] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b7b1a3f0 [ 47.485555] R13: dffffc0000000000 R14: ffff8801bb1cf2f8 R15: ffff8801bb1cf438 [ 47.492804] FS: 0000000000995880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 47.501011] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.506897] CR2: 0000000020000080 CR3: 00000001c5812000 CR4: 00000000001406f0 [ 47.514149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.521404] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.528657] Call Trace: [ 47.531237] ? rb_insert_color+0x1460/0x1460 [ 47.535631] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 47.540541] ? mark_held_locks+0x130/0x130 [ 47.544769] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.550557] ? mark_held_locks+0x130/0x130 [ 47.554773] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.560034] ? mark_held_locks+0x130/0x130 [ 47.564260] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.569862] ? mark_held_locks+0x130/0x130 [ 47.574082] ? mark_page_accessed+0xcb0/0x2040 [ 47.578658] ? activate_page+0x1040/0x1040 [ 47.582871] ? activate_page+0x1040/0x1040 [ 47.587092] ? pagecache_get_page+0x2d8/0xf00 [ 47.591570] ? find_get_pages_contig+0x15b0/0x15b0 [ 47.596483] ? lock_downgrade+0x900/0x900 [ 47.600612] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.606390] ? mark_held_locks+0x130/0x130 [ 47.610604] ? depot_save_stack+0x292/0x470 [ 47.614994] ? mark_held_locks+0x130/0x130 [ 47.619206] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 47.624569] ? lock_downgrade+0x900/0x900 [ 47.628696] ? kasan_check_read+0x11/0x20 [ 47.632821] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.637209] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.641777] ? mark_held_locks+0x130/0x130 [ 47.645991] ? _raw_spin_unlock+0x2c/0x50 [ 47.650119] ? ext4_discard_preallocations+0x18a/0x13c0 [ 47.655465] ? trace_hardirqs_on+0xbd/0x310 [ 47.659773] ? ext4_exit_mballoc+0xc0/0xc0 [ 47.663991] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 47.668988] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 47.673725] ? modules_open+0xa0/0xa0 [ 47.677506] ? __es_tree_search.isra.12+0x1ba/0x220 [ 47.682502] ? __es_remove_extent+0x9a3/0xba0 [ 47.686974] ? mark_held_locks+0x130/0x130 [ 47.691187] ? lock_downgrade+0x900/0x900 [ 47.695315] ? ext4_es_scan+0x960/0x960 [ 47.699269] ? lock_release+0x970/0x970 [ 47.703228] ? trace_hardirqs_on+0xbd/0x310 [ 47.707528] ? kasan_check_read+0x11/0x20 [ 47.711664] ? clear_inode+0x114/0x3a0 [ 47.715633] ? do_raw_write_trylock+0x1c0/0x1c0 [ 47.720279] ? kasan_check_write+0x14/0x20 [ 47.724492] ? lock_acquire+0x1ed/0x520 [ 47.728445] ? integrity_inode_free+0x77/0x320 [ 47.733027] ? ext4_es_remove_extent+0x151/0x500 [ 47.737764] ? lock_release+0x970/0x970 [ 47.741721] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 47.746816] ? depot_save_stack+0x292/0x470 [ 47.751119] ? kasan_check_write+0x14/0x20 [ 47.755340] ? do_raw_write_lock+0xbd/0x1b0 [ 47.759642] integrity_inode_free+0x12f/0x320 [ 47.764120] security_inode_free+0x19/0x90 [ 47.768335] __destroy_inode+0x328/0x820 [ 47.772375] ? generic_update_time+0x450/0x450 [ 47.776934] ? evict+0x5d8/0x980 [ 47.780282] ? lock_downgrade+0x900/0x900 [ 47.784411] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.789583] destroy_inode+0xda/0x200 [ 47.793363] ? __destroy_inode+0x820/0x820 [ 47.797574] ? kasan_check_write+0x14/0x20 [ 47.801788] ? do_raw_spin_lock+0xc1/0x200 [ 47.806032] evict+0x5e0/0x980 [ 47.809231] ? jbd2_journal_stop+0x430/0x15d0 [ 47.813720] ? destroy_inode+0x200/0x200 [ 47.817763] ? do_raw_spin_lock+0xc1/0x200 [ 47.821979] ? iput+0x671/0xa90 [ 47.825239] ? lock_downgrade+0x900/0x900 [ 47.829382] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.834898] ? kasan_check_read+0x11/0x20 [ 47.839042] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.843616] ? lock_downgrade+0x900/0x900 [ 47.847742] ? ext4_ioctl+0x231b/0x4210 [ 47.851695] iput+0x679/0xa90 [ 47.854782] ? inode_add_lru+0x2a0/0x2a0 [ 47.858821] ? up_write+0x7b/0x220 [ 47.862357] ? up_read+0x110/0x110 [ 47.865875] ? up_read+0x110/0x110 [ 47.869395] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.874911] ? check_preemption_disabled+0x48/0x200 [ 47.879908] ext4_ioctl+0x236f/0x4210 [ 47.883706] ? ext4_ioctl_group_add+0x560/0x560 [ 47.888357] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.894134] ? kasan_check_read+0x11/0x20 [ 47.898258] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.903511] ? unwind_dump+0x190/0x190 [ 47.907374] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.912886] ? avc_has_extended_perms+0xab2/0x15a0 [ 47.917793] ? fpu__prepare_read+0x17/0x750 [ 47.922091] ? avc_ss_reset+0x190/0x190 [ 47.926056] ? save_stack+0xa9/0xd0 [ 47.929660] ? save_stack+0x43/0xd0 [ 47.933262] ? __kasan_slab_free+0x102/0x150 [ 47.937665] ? kasan_slab_free+0xe/0x10 [ 47.941625] ? kmem_cache_free+0x83/0x290 [ 47.945749] ? putname+0xf2/0x130 [ 47.949178] ? do_sys_open+0x54d/0x700 [ 47.953061] ? __x64_sys_openat+0x9d/0x100 [ 47.957299] ? do_syscall_64+0x1b9/0x820 [ 47.961337] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.966680] ? trace_hardirqs_off+0xb8/0x310 [ 47.971063] ? kasan_check_read+0x11/0x20 [ 47.975191] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.979579] ? ___might_sleep+0x1ed/0x300 [ 47.983734] ? arch_local_save_flags+0x40/0x40 [ 47.988290] ? kasan_check_write+0x14/0x20 [ 47.992503] ? trace_hardirqs_off+0xb8/0x310 [ 47.996891] ? ext4_ioctl_group_add+0x560/0x560 [ 48.001569] do_vfs_ioctl+0x1de/0x1720 [ 48.005436] ? ioctl_preallocate+0x300/0x300 [ 48.009830] ? selinux_file_mprotect+0x620/0x620 [ 48.014562] ? putname+0xf2/0x130 [ 48.017994] ? kmem_cache_free+0x21a/0x290 [ 48.022208] ? putname+0xf7/0x130 [ 48.025640] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.031153] ? security_file_ioctl+0x94/0xc0 [ 48.035542] ksys_ioctl+0xa9/0xd0 [ 48.038988] __x64_sys_ioctl+0x73/0xb0 [ 48.042933] do_syscall_64+0x1b9/0x820 [ 48.046810] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.052154] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.057060] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.062237] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.067232] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.072226] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.077231] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.082054] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.087221] RIP: 0033:0x440009 [ 48.090397] 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 [ 48.109458] RSP: 002b:00007ffd74a68798 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 48.117144] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 48.124390] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 48.131636] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 48.138893] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 48.146151] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 48.153405] Modules linked in: [ 48.156631] ---[ end trace 6aa8c97374dc51a5 ]--- [ 48.161400] RIP: 0010:rb_erase+0x306/0x3710 [ 48.165821] 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 [ 48.184760] RSP: 0018:ffff8801bb1ce918 EFLAGS: 00010202 [ 48.190139] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.197402] RDX: 1ffff10037639d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.204676] RBP: ffff8801bb1cf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 48.211946] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b7b1a3f0 [ 48.219226] R13: dffffc0000000000 R14: ffff8801bb1cf2f8 R15: ffff8801bb1cf438 [ 48.226489] FS: 0000000000995880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 48.234724] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.240611] CR2: 0000000020000080 CR3: 00000001c5812000 CR4: 00000000001406f0 [ 48.247949] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.255312] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.262588] Kernel panic - not syncing: Fatal exception [ 48.269064] Kernel Offset: disabled [ 48.272690] Rebooting in 86400 seconds..