syzkaller login: [ 50.843798] audit: type=1400 audit(1540424133.745:35): avc: denied { map } for pid=5496 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 '10.128.0.102' (ECDSA) to the list of known hosts. executing program [ 57.319677] audit: type=1400 audit(1540424140.215:36): avc: denied { map } for pid=5508 comm="syz-executor286" path="/root/syz-executor286808025" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 57.323459] kasan: CONFIG_KASAN_INLINE enabled [ 57.350623] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 57.358146] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 57.364374] CPU: 1 PID: 5508 Comm: syz-executor286 Not tainted 4.19.0+ #80 [ 57.371379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.380740] RIP: 0010:rb_erase+0x306/0x3710 [ 57.385053] 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 [ 57.403953] RSP: 0018:ffff8801bc45e918 EFLAGS: 00010202 [ 57.409317] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 57.416589] RDX: 1ffff1003788bd2b RSI: ffffffff8af92020 RDI: 0000000000000008 [ 57.423847] RBP: ffff8801bc45f320 R08: dffffc0000000000 R09: ffffed003788be53 [ 57.431147] R10: ffffed003788be53 R11: 0000000000000003 R12: ffff8801b0b433b0 [ 57.438409] R13: dffffc0000000000 R14: ffff8801bc45f2f8 R15: ffff8801bc45f438 [ 57.445668] FS: 000000000117e880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 57.453921] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.459792] CR2: 0000000020002000 CR3: 00000001c66b7000 CR4: 00000000001406e0 [ 57.467060] Call Trace: [ 57.469647] ? modules_open+0xa0/0xa0 [ 57.473447] ? rb_insert_color+0x1460/0x1460 [ 57.477844] ? noop_count+0x40/0x40 [ 57.481455] ? print_bfs_bug+0x80/0x80 [ 57.485332] ? mark_held_locks+0x130/0x130 [ 57.489555] ? kernel_text_address+0x79/0xf0 [ 57.493954] ? noop_count+0x40/0x40 [ 57.497566] ? print_bfs_bug+0x80/0x80 [ 57.501481] ? noop_count+0x40/0x40 [ 57.505103] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 57.510630] ? check_usage_forwards+0x3d0/0x3d0 [ 57.515290] ? __bfs+0x321/0x780 [ 57.518643] ? check_usage+0x1aa/0x790 [ 57.522514] ? print_bfs_bug+0x80/0x80 [ 57.526389] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 57.531305] ? check_usage_forwards+0x3d0/0x3d0 [ 57.535974] ? kasan_check_read+0x11/0x20 [ 57.540123] ? graph_lock+0x9c/0x270 [ 57.543846] ? __bfs+0x321/0x780 [ 57.547197] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 57.553110] ? lockdep_on+0x50/0x50 [ 57.556733] ? print_bfs_bug+0x80/0x80 [ 57.560627] ? kasan_check_read+0x11/0x20 [ 57.564766] ? graph_lock+0x9c/0x270 [ 57.568505] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 57.574383] ? mark_held_locks+0x130/0x130 [ 57.578610] ? kasan_check_read+0x11/0x20 [ 57.582746] ? __lock_acquire+0x2aff/0x4c20 [ 57.587062] ? mark_held_locks+0x130/0x130 [ 57.591287] ? print_usage_bug+0xc0/0xc0 [ 57.595379] ? print_usage_bug+0xc0/0xc0 [ 57.599428] ? __lock_acquire+0x62f/0x4c20 [ 57.603652] ? zap_class+0x640/0x640 [ 57.607350] ? print_usage_bug+0xc0/0xc0 [ 57.611395] ? __lock_acquire+0x62f/0x4c20 [ 57.615623] ? mark_held_locks+0x130/0x130 [ 57.619844] ? lock_downgrade+0x900/0x900 [ 57.623985] ? ext4_es_scan+0x960/0x960 [ 57.627951] ? kasan_check_read+0x11/0x20 [ 57.632085] ? do_raw_write_lock+0x14f/0x310 [ 57.636477] ? do_raw_write_trylock+0x270/0x270 [ 57.641129] ? lock_acquire+0x1ed/0x520 [ 57.645134] ? integrity_inode_free+0x77/0x320 [ 57.649718] ? ext4_es_remove_extent+0x151/0x500 [ 57.654468] ? kasan_check_read+0x11/0x20 [ 57.658608] ? do_raw_write_lock+0x14f/0x310 [ 57.663053] ? do_raw_read_unlock+0x70/0x70 [ 57.667363] ? zap_class+0x640/0x640 [ 57.671065] integrity_inode_free+0x12f/0x320 [ 57.675553] security_inode_free+0x19/0x90 [ 57.679783] __destroy_inode+0x328/0x820 [ 57.683834] ? clear_nlink+0xe0/0xe0 [ 57.687533] ? evict+0x5d8/0x980 [ 57.690890] ? lock_downgrade+0x900/0x900 [ 57.695026] ? __inode_wait_for_writeback+0x2cf/0x380 [ 57.700250] destroy_inode+0xda/0x200 [ 57.704101] ? __destroy_inode+0x820/0x820 [ 57.708333] evict+0x5e0/0x980 [ 57.711523] ? destroy_inode+0x200/0x200 [ 57.715571] ? iput+0x671/0xa90 [ 57.718835] ? lock_downgrade+0x900/0x900 [ 57.722966] ? kasan_check_read+0x11/0x20 [ 57.727107] ? do_raw_spin_trylock+0x270/0x270 [ 57.731681] ? lock_downgrade+0x900/0x900 [ 57.735817] iput+0x679/0xa90 [ 57.738959] ? inode_add_lru+0x2a0/0x2a0 [ 57.743020] ? up_write+0x7b/0x220 [ 57.746548] ? down_write_nested+0x130/0x130 [ 57.750941] ? down_write_nested+0x130/0x130 [ 57.755336] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.760862] ? check_preemption_disabled+0x48/0x280 [ 57.765924] ext4_ioctl+0x236f/0x4210 [ 57.769723] ? ext4_ioctl_group_add+0x560/0x560 [ 57.774387] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 57.779307] ? kasan_check_read+0x11/0x20 [ 57.783458] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 57.788726] ? rcu_softirq_qs+0x20/0x20 [ 57.792686] ? rcu_softirq_qs+0x20/0x20 [ 57.796644] ? unwind_dump+0x190/0x190 [ 57.800518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.806048] ? avc_has_extended_perms+0xab2/0x15a0 [ 57.810977] ? avc_ss_reset+0x190/0x190 [ 57.814947] ? save_stack+0xa9/0xd0 [ 57.818565] ? save_stack+0x43/0xd0 [ 57.822228] ? __kasan_slab_free+0x102/0x150 [ 57.826634] ? kasan_slab_free+0xe/0x10 [ 57.830603] ? kmem_cache_free+0x83/0x290 [ 57.834740] ? putname+0xf2/0x130 [ 57.838184] ? do_sys_open+0x54d/0x700 [ 57.842061] ? __x64_sys_open+0x7e/0xc0 [ 57.846027] ? do_syscall_64+0x1b9/0x820 [ 57.850089] ? kasan_check_read+0x11/0x20 [ 57.854230] ? perf_trace_sched_process_exec+0x860/0x860 [ 57.859678] ? trace_hardirqs_off+0xb8/0x310 [ 57.864080] ? ext4_ioctl_group_add+0x560/0x560 [ 57.868740] do_vfs_ioctl+0x1de/0x1720 [ 57.872613] ? ioctl_preallocate+0x300/0x300 [ 57.877015] ? selinux_file_mprotect+0x620/0x620 [ 57.881764] ? rcu_read_lock_sched_held+0x14f/0x180 [ 57.886773] ? kmem_cache_free+0x1fb/0x290 [ 57.890994] ? putname+0xf7/0x130 [ 57.894440] ? do_syscall_64+0x9a/0x820 [ 57.898405] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.903973] ? security_file_ioctl+0x94/0xc0 [ 57.908375] ksys_ioctl+0xa9/0xd0 [ 57.911815] __x64_sys_ioctl+0x73/0xb0 [ 57.915694] do_syscall_64+0x1b9/0x820 [ 57.919570] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 57.924918] ? syscall_return_slowpath+0x5e0/0x5e0 [ 57.929832] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.934767] ? trace_hardirqs_on_caller+0x310/0x310 [ 57.939826] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 57.944849] ? prepare_exit_to_usermode+0x291/0x3b0 [ 57.949855] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.954745] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.959981] RIP: 0033:0x43fff9 [ 57.963170] 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 [ 57.982112] RSP: 002b:00007ffcaba8e1a8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 57.989815] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fff9 [ 57.997078] RDX: 000000000043fff9 RSI: 0000000000006611 RDI: 0000000000000003 [ 58.004343] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 58.011607] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401880 [ 58.018870] R13: 0000000000401910 R14: 0000000000000000 R15: 0000000000000000 [ 58.026142] Modules linked in: [ 58.029414] ---[ end trace 53d528d5edd078e6 ]--- [ 58.034201] RIP: 0010:rb_erase+0x306/0x3710 [ 58.038516] 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 [ 58.057487] RSP: 0018:ffff8801bc45e918 EFLAGS: 00010202 [ 58.062880] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.070205] RDX: 1ffff1003788bd2b RSI: ffffffff8af92020 RDI: 0000000000000008 [ 58.077501] RBP: ffff8801bc45f320 R08: dffffc0000000000 R09: ffffed003788be53 [ 58.084810] R10: ffffed003788be53 R11: 0000000000000003 R12: ffff8801b0b433b0 [ 58.092074] R13: dffffc0000000000 R14: ffff8801bc45f2f8 R15: ffff8801bc45f438 [ 58.099423] FS: 000000000117e880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 58.107696] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.113640] CR2: 0000000020002000 CR3: 00000001c66b7000 CR4: 00000000001406e0 [ 58.120917] Kernel panic - not syncing: Fatal exception [ 58.127166] Kernel Offset: disabled [ 58.130793] Rebooting in 86400 seconds..