[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.921526][ T26] audit: type=1800 audit(1560806966.680:25): pid=8767 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.973945][ T26] audit: type=1800 audit(1560806966.690:26): pid=8767 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.012368][ T26] audit: type=1800 audit(1560806966.690:27): pid=8767 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.536937][ T8920] ------------[ cut here ]------------ [ 76.542460][ T8920] kernel BUG at drivers/android/binder_alloc.c:1130! [ 76.549640][ T8920] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 76.555936][ T8920] CPU: 0 PID: 8920 Comm: syz-executor933 Not tainted 5.2.0-rc5 #54 [ 76.563966][ T8920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.574166][ T8920] RIP: 0010:binder_alloc_do_buffer_copy+0xd6/0x510 [ 76.580812][ T8920] Code: 02 00 0f 85 20 04 00 00 4d 8b 64 24 58 49 29 dc e8 bf 9d 1c fc 4c 89 e6 4c 89 ef e8 d4 9e 1c fc 4d 39 e5 76 07 e8 aa 9d 1c fc <0f> 0b e8 a3 9d 1c fc 4c 8b 75 d0 4d 29 ec 4c 89 e6 4c 89 f7 e8 b1 [ 76.600566][ T8920] RSP: 0018:ffff88808b91f4e0 EFLAGS: 00010293 [ 76.606630][ T8920] RAX: ffff88809296c200 RBX: 0000000020001000 RCX: ffffffff855423cf [ 76.614798][ T8920] RDX: 0000000000000000 RSI: ffffffff855423b6 RDI: 0000000000000006 [ 76.622925][ T8920] RBP: ffff88808b91f560 R08: ffff88809296c200 R09: 0000000000000008 [ 76.631945][ T8920] R10: ffffed1011723f15 R11: ffff88808b91f8af R12: 0000000000000078 [ 76.640153][ T8920] R13: 0000000000000008 R14: 00000000000000e8 R15: 0000000000000000 [ 76.648297][ T8920] FS: 00005555556e5940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 76.657456][ T8920] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.664035][ T8920] CR2: 0000000000000000 CR3: 000000008bd57000 CR4: 00000000001406f0 [ 76.672173][ T8920] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.680353][ T8920] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.688407][ T8920] Call Trace: [ 76.691798][ T8920] ? find_held_lock+0x35/0x130 [ 76.696839][ T8920] binder_alloc_copy_from_buffer+0x37/0x42 [ 76.702816][ T8920] binder_validate_ptr+0xcc/0x1d0 [ 76.707866][ T8920] ? binder_get_object+0x210/0x210 [ 76.712990][ T8920] ? binder_alloc_copy_from_buffer+0x37/0x42 [ 76.719100][ T8920] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 76.725004][ T8920] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 76.730840][ T8920] ? binder_get_object+0x181/0x210 [ 76.735958][ T8920] binder_transaction+0x2c9c/0x6620 [ 76.741185][ T8920] ? binder_thread_read+0x3d00/0x3d00 [ 76.746577][ T8920] ? mark_held_locks+0xf0/0xf0 [ 76.751354][ T8920] ? mark_held_locks+0xf0/0xf0 [ 76.756140][ T8920] ? __might_fault+0x12b/0x1e0 [ 76.761505][ T8920] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.767889][ T8920] ? _copy_from_user+0xdd/0x150 [ 76.772944][ T8920] binder_thread_write+0x64a/0x2820 [ 76.778186][ T8920] ? mark_held_locks+0xf0/0xf0 [ 76.782955][ T8920] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 76.788596][ T8920] ? binder_transaction+0x6620/0x6620 [ 76.793972][ T8920] ? __might_fault+0x12b/0x1e0 [ 76.798761][ T8920] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.804987][ T8920] ? _copy_from_user+0xdd/0x150 [ 76.809831][ T8920] binder_ioctl+0x102f/0x1833 [ 76.814504][ T8920] ? binder_thread_write+0x2820/0x2820 [ 76.819989][ T8920] ? tomoyo_path_number_perm+0x263/0x520 [ 76.825629][ T8920] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 76.831449][ T8920] ? userfaultfd_unmap_prep+0x4a0/0x4a0 [ 76.837013][ T8920] ? binder_thread_write+0x2820/0x2820 [ 76.842488][ T8920] do_vfs_ioctl+0xd5f/0x1380 [ 76.847201][ T8920] ? ioctl_preallocate+0x210/0x210 [ 76.852426][ T8920] ? vma_is_stack_for_current+0xd0/0xd0 [ 76.857963][ T8920] ? ksys_dup3+0x3e0/0x3e0 [ 76.862626][ T8920] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 76.868874][ T8920] ? fput_many+0x12c/0x1a0 [ 76.873311][ T8920] ? fput+0x1b/0x20 [ 76.877122][ T8920] ? tomoyo_file_ioctl+0x23/0x30 [ 76.882239][ T8920] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.888815][ T8920] ? security_file_ioctl+0x8d/0xc0 [ 76.893934][ T8920] ksys_ioctl+0xab/0xd0 [ 76.898557][ T8920] __x64_sys_ioctl+0x73/0xb0 [ 76.903649][ T8920] do_syscall_64+0xfd/0x680 [ 76.908190][ T8920] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.914360][ T8920] RIP: 0033:0x444a29 [ 76.918545][ T8920] 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.946895][ T8920] RSP: 002b:00007ffcbcd0fc28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.955304][ T8920] RAX: ffffffffffffffda RBX: 00007ffcbcd0fc30 RCX: 0000000000444a29 [ 76.963270][ T8920] RDX: 0000000020000440 RSI: 00000000c0306201 RDI: 0000000000000003 [ 76.971241][ T8920] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000401310 [ 76.979348][ T8920] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402730 [ 76.987430][ T8920] R13: 00000000004027c0 R14: 0000000000000000 R15: 0000000000000000 [ 76.995400][ T8920] Modules linked in: [ 76.999664][ T8920] ---[ end trace 3626e6aef2ad2274 ]--- [ 77.005258][ T8920] RIP: 0010:binder_alloc_do_buffer_copy+0xd6/0x510 [ 77.011934][ T8920] Code: 02 00 0f 85 20 04 00 00 4d 8b 64 24 58 49 29 dc e8 bf 9d 1c fc 4c 89 e6 4c 89 ef e8 d4 9e 1c fc 4d 39 e5 76 07 e8 aa 9d 1c fc <0f> 0b e8 a3 9d 1c fc 4c 8b 75 d0 4d 29 ec 4c 89 e6 4c 89 f7 e8 b1 [ 77.031832][ T8920] RSP: 0018:ffff88808b91f4e0 EFLAGS: 00010293 [ 77.037980][ T8920] RAX: ffff88809296c200 RBX: 0000000020001000 RCX: ffffffff855423cf [ 77.046132][ T8920] RDX: 0000000000000000 RSI: ffffffff855423b6 RDI: 0000000000000006 [ 77.054296][ T8920] RBP: ffff88808b91f560 R08: ffff88809296c200 R09: 0000000000000008 [ 77.062295][ T8920] R10: ffffed1011723f15 R11: ffff88808b91f8af R12: 0000000000000078 [ 77.070285][ T8920] R13: 0000000000000008 R14: 00000000000000e8 R15: 0000000000000000 [ 77.078413][ T8920] FS: 00005555556e5940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.087336][ T8920] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.093968][ T8920] CR2: 0000000000000000 CR3: 000000008bd57000 CR4: 00000000001406f0 [ 77.102075][ T8920] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.110074][ T8920] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.118177][ T8920] Kernel panic - not syncing: Fatal exception [ 77.125240][ T8920] Kernel Offset: disabled [ 77.129560][ T8920] Rebooting in 86400 seconds..