[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.919863][ T25] audit: type=1800 audit(1575257907.342:25): pid=8680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.939765][ T25] audit: type=1800 audit(1575257907.342:26): pid=8680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.984839][ T25] audit: type=1800 audit(1575257907.352:27): pid=8680 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. syzkaller login: [ 70.532159][ T8840] IPVS: ftp: loaded support on port[0] = 21 [ 70.532165][ T8841] IPVS: ftp: loaded support on port[0] = 21 [ 70.549109][ T8843] IPVS: ftp: loaded support on port[0] = 21 [ 70.558945][ T8842] IPVS: ftp: loaded support on port[0] = 21 [ 70.558952][ T8844] IPVS: ftp: loaded support on port[0] = 21 [ 70.573348][ T8838] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program [ 70.787520][ C1] hrtimer: interrupt took 48944 ns 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 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 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 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 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 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 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 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 [ 77.763070][ T9437] ------------[ cut here ]------------ [ 77.768588][ T9437] kernel BUG at fs/pipe.c:582! executing program [ 77.824271][ T9437] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 77.830408][ T9437] CPU: 1 PID: 9437 Comm: syz-executor480 Not tainted 5.4.0-syzkaller #0 [ 77.838720][ T9437] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.848849][ T9437] RIP: 0010:pipe_poll+0x37f/0x400 [ 77.853852][ T9437] Code: ff 85 db 75 09 e8 b1 ee b5 ff 41 83 ce 08 e8 a8 ee b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 91 ee b5 ff <0f> 0b e8 ca 40 f3 ff e9 ed fc ff ff e8 c0 40 f3 ff e9 b3 fd ff ff [ 77.873444][ T9437] RSP: 0018:ffff88808cf77698 EFLAGS: 00010293 [ 77.879518][ T9437] RAX: ffff88809874e080 RBX: ffff88808cd90000 RCX: ffffffff81beed8a [ 77.887470][ T9437] RDX: 0000000000000000 RSI: ffffffff81beefaf RDI: 0000000000000004 [ 77.895426][ T9437] RBP: ffff88808cf776d0 R08: ffff88809874e080 R09: ffff88809874e910 [ 77.903380][ T9437] R10: fffffbfff146e220 R11: ffffffff8a371107 R12: ffff8880a588ea80 [ 77.911379][ T9437] R13: 00000000ffffffd0 R14: 0000000000000010 R15: 00000000000002c0 [ 77.919342][ T9437] FS: 00007fb825d80700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.928274][ T9437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.934864][ T9437] CR2: 00007fb825da0db8 CR3: 0000000098063000 CR4: 00000000001406e0 [ 77.942841][ T9437] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.950814][ T9437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.958781][ T9437] Call Trace: [ 77.962074][ T9437] ? pipe_unlock+0x80/0x80 [ 77.966494][ T9437] do_select+0x922/0x16f0 [ 77.970834][ T9437] ? select_estimate_accuracy+0x330/0x330 [ 77.976560][ T9437] ? poll_freewait+0x260/0x260 [ 77.981329][ T9437] ? poll_freewait+0x260/0x260 [ 77.986094][ T9437] ? poll_freewait+0x260/0x260 [ 77.990861][ T9437] ? poll_freewait+0x260/0x260 [ 77.995628][ T9437] ? poll_freewait+0x260/0x260 [ 78.000395][ T9437] ? poll_freewait+0x260/0x260 [ 78.005156][ T9437] ? poll_freewait+0x260/0x260 [ 78.009916][ T9437] ? poll_freewait+0x260/0x260 [ 78.014679][ T9437] ? poll_freewait+0x260/0x260 [ 78.019463][ T9437] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.025704][ T9437] core_sys_select+0x53c/0x8c0 [ 78.030476][ T9437] ? core_sys_select+0x53c/0x8c0 [ 78.035421][ T9437] ? do_compat_pselect+0x230/0x230 [ 78.040541][ T9437] ? __might_fault+0x12b/0x1e0 [ 78.045323][ T9437] ? futex_exit_release+0x70/0x70 [ 78.050360][ T9437] ? lock_downgrade+0x920/0x920 [ 78.055211][ T9437] ? lock_acquire+0x20b/0x410 [ 78.059897][ T9437] ? set_user_sigmask+0x166/0x1e0 [ 78.064948][ T9437] ? sigprocmask+0x2b0/0x2b0 executing program executing program executing program [ 78.069561][ T9437] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.075810][ T9437] ? debug_smp_processor_id+0x33/0x18a [ 78.081273][ T9437] do_pselect.constprop.0+0x199/0x1e0 [ 78.086651][ T9437] ? kern_select+0x1e0/0x1e0 [ 78.091257][ T9437] ? __x64_sys_futex+0x404/0x590 [ 78.096372][ T9437] ? __this_cpu_preempt_check+0x8a/0x190 [ 78.102017][ T9437] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.107526][ T9437] __x64_sys_pselect6+0x1fc/0x2e0 [ 78.112536][ T9437] do_syscall_64+0xfa/0x790 [ 78.117058][ T9437] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.122929][ T9437] RIP: 0033:0x44c569 [ 78.126805][ T9437] Code: e8 ac e7 ff ff 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 6b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 78.146390][ T9437] RSP: 002b:00007fb825d7fcd8 EFLAGS: 00000246 ORIG_RAX: 000000000000010e [ 78.154784][ T9437] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 000000000044c569 [ 78.162775][ T9437] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040 executing program executing program [ 78.170729][ T9437] RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000 [ 78.178683][ T9437] R10: 0000000020000140 R11: 0000000000000246 R12: 00000000006ddc5c [ 78.186644][ T9437] R13: 00007fff3782294f R14: 00007fb825d809c0 R15: 00000000006ddc5c [ 78.194664][ T9437] Modules linked in: [ 78.201307][ T9437] ---[ end trace bee70481554b9517 ]--- [ 78.214047][ T9437] RIP: 0010:pipe_poll+0x37f/0x400 [ 78.232805][ T9437] Code: ff 85 db 75 09 e8 b1 ee b5 ff 41 83 ce 08 e8 a8 ee b5 ff 44 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 91 ee b5 ff <0f> 0b e8 ca 40 f3 ff e9 ed fc ff ff e8 c0 40 f3 ff e9 b3 fd ff ff [ 78.289121][ T9437] RSP: 0018:ffff88808cf77698 EFLAGS: 00010293 [ 78.295683][ T9437] RAX: ffff88809874e080 RBX: ffff88808cd90000 RCX: ffffffff81beed8a [ 78.303866][ T9437] RDX: 0000000000000000 RSI: ffffffff81beefaf RDI: 0000000000000004 [ 78.312236][ T9437] RBP: ffff88808cf776d0 R08: ffff88809874e080 R09: ffff88809874e910 [ 78.320473][ T9437] R10: fffffbfff146e220 R11: ffffffff8a371107 R12: ffff8880a588ea80 [ 78.328627][ T9437] R13: 00000000ffffffd0 R14: 0000000000000010 R15: 00000000000002c0 [ 78.336814][ T9437] FS: 00007fb825d80700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.345901][ T9437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.352584][ T9437] CR2: 0000000021000000 CR3: 0000000098063000 CR4: 00000000001406e0 [ 78.360701][ T9437] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.368828][ T9437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.376957][ T9437] Kernel panic - not syncing: Fatal exception [ 78.384344][ T9437] Kernel Offset: disabled [ 78.388663][ T9437] Rebooting in 86400 seconds..