[ 42.634505][ T26] audit: type=1800 audit(1575224473.671:26): pid=7983 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.664838][ T26] audit: type=1800 audit(1575224473.671:27): pid=7983 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 42.684694][ T26] audit: type=1800 audit(1575224473.681:28): pid=7983 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 43.398344][ T26] audit: type=1800 audit(1575224474.451:29): pid=7983 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.827533][ T8133] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 61.492599][ T8256] ------------[ cut here ]------------ [ 61.498087][ T8256] kernel BUG at fs/pipe.c:582! [ 61.504664][ T8256] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 61.510724][ T8256] CPU: 0 PID: 8256 Comm: syz-executor834 Not tainted 5.4.0-syzkaller #0 [ 61.519020][ T8256] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.529058][ T8256] RIP: 0010:pipe_poll+0x3d5/0x3e0 [ 61.536139][ T8256] Code: 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 59 fe ff ff 48 89 55 d0 48 89 df e8 e9 d9 f3 ff 48 8b 55 d0 e9 44 fe ff ff e8 6b a4 b8 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 [ 61.555717][ T8256] RSP: 0018:ffff8880950af828 EFLAGS: 00010293 [ 61.561811][ T8256] RAX: ffffffff81bddb45 RBX: 0000000000000001 RCX: ffff88808e89e280 [ 61.569783][ T8256] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff [ 61.577735][ T8256] RBP: ffff8880950af868 R08: ffffffff81bdd88c R09: fffffbfff1287045 [ 61.585684][ T8256] R10: fffffbfff1287045 R11: 0000000000000000 R12: dffffc0000000000 [ 61.593631][ T8256] R13: ffff8880a525bc00 R14: ffff88809516dcc0 R15: 00000000ffffffff [ 61.601614][ T8256] FS: 00007fd6a22d2700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 61.610516][ T8256] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.617086][ T8256] CR2: 00007fd6a22d1e78 CR3: 0000000094d6b000 CR4: 00000000001406f0 [ 61.625034][ T8256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.632978][ T8256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.640922][ T8256] Call Trace: [ 61.644187][ T8256] ? pipe_write+0x1130/0x1130 [ 61.648856][ T8256] do_select+0x11c8/0x1af0 [ 61.653269][ T8256] ? __x32_compat_sys_ppoll_time64+0xd0/0xd0 [ 61.659223][ T8256] ? __x32_compat_sys_ppoll_time64+0xd0/0xd0 [ 61.665186][ T8256] ? __x32_compat_sys_ppoll_time64+0xd0/0xd0 [ 61.671147][ T8256] ? __x32_compat_sys_ppoll_time64+0xd0/0xd0 [ 61.677103][ T8256] ? __might_fault+0xf9/0x160 [ 61.681759][ T8256] core_sys_select+0x716/0x870 [ 61.686501][ T8256] ? ktime_get_ts64+0x6e/0x2c0 [ 61.691247][ T8256] ? read_seqcount_begin+0x125/0x1c0 [ 61.696528][ T8256] ? trace_hardirqs_on+0x74/0x80 [ 61.701434][ T8256] ? ktime_get_ts64+0x6e/0x2c0 [ 61.706169][ T8256] ? read_seqcount_begin+0x17a/0x1c0 [ 61.711424][ T8256] ? ktime_get_ts64+0x236/0x2c0 [ 61.716250][ T8256] ? timespec64_add_safe+0x171/0x1b0 [ 61.721511][ T8256] __se_sys_pselect6+0x357/0x3f0 [ 61.726420][ T8256] ? prepare_exit_to_usermode+0x221/0x5b0 [ 61.732111][ T8256] __x64_sys_pselect6+0xe5/0x100 [ 61.737026][ T8256] do_syscall_64+0xf7/0x1c0 [ 61.741519][ T8256] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.747381][ T8256] RIP: 0033:0x44ba39 [ 61.751252][ T8256] Code: e8 ac ce 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab cc fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 61.770841][ T8256] RSP: 002b:00007fd6a22d1da8 EFLAGS: 00000246 ORIG_RAX: 000000000000010e [ 61.779248][ T8256] RAX: ffffffffffffffda RBX: 00000000006e3a18 RCX: 000000000044ba39 [ 61.787190][ T8256] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040 [ 61.795134][ T8256] RBP: 00000000006e3a10 R08: 0000000020000200 R09: 0000000000000000 [ 61.803078][ T8256] R10: 0000000020000040 R11: 0000000000000246 R12: 00000000006e3a1c [ 61.811021][ T8256] R13: 00007ffd534b5e4f R14: 00007fd6a22d29c0 R15: 000000000000000d [ 61.818969][ T8256] Modules linked in: [ 61.823387][ T8256] ---[ end trace 59acec8003172e12 ]--- [ 61.828917][ T8256] RIP: 0010:pipe_poll+0x3d5/0x3e0 [ 61.833975][ T8256] Code: 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 59 fe ff ff 48 89 55 d0 48 89 df e8 e9 d9 f3 ff 48 8b 55 d0 e9 44 fe ff ff e8 6b a4 b8 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 [ 61.853620][ T8256] RSP: 0018:ffff8880950af828 EFLAGS: 00010293 [ 61.859711][ T8256] RAX: ffffffff81bddb45 RBX: 0000000000000001 RCX: ffff88808e89e280 [ 61.867778][ T8256] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff [ 61.875761][ T8256] RBP: ffff8880950af868 R08: ffffffff81bdd88c R09: fffffbfff1287045 [ 61.883739][ T8256] R10: fffffbfff1287045 R11: 0000000000000000 R12: dffffc0000000000 [ 61.891712][ T8256] R13: ffff8880a525bc00 R14: ffff88809516dcc0 R15: 00000000ffffffff [ 61.899695][ T8256] FS: 00007fd6a22d2700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 61.908764][ T8256] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.915352][ T8256] CR2: 00007fd6a22d1e78 CR3: 0000000094d6b000 CR4: 00000000001406f0 [ 61.923311][ T8256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.931304][ T8256] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.939393][ T8256] Kernel panic - not syncing: Fatal exception [ 61.946862][ T8256] Kernel Offset: disabled [ 61.951177][ T8256] Rebooting in 86400 seconds..