[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.903410][ T26] audit: type=1800 audit(1582809368.461:25): pid=8651 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.923368][ T26] audit: type=1800 audit(1582809368.461:26): pid=8651 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.943052][ T26] audit: type=1800 audit(1582809368.461:27): pid=8651 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.1.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.037605][ T8801] iwpm_register_pid: Unable to send a nlmsg (client = 2) [ 63.047393][ T8801] infiniband syz1: RDMA CMA: cma_listen_on_dev, error -98 [ 63.059919][ T8801] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 63.071643][ T8801] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 63.080034][ T8801] CPU: 1 PID: 8801 Comm: syz-executor785 Not tainted 5.6.0-rc3-syzkaller #0 [ 63.088687][ T8801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.098740][ T8801] RIP: 0010:nldev_stat_set_doit+0x60d/0xdd0 [ 63.104626][ T8801] Code: f8 00 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05 e8 56 d4 d8 fb 48 8b 9c 24 f8 00 00 00 48 83 c3 04 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 9d 05 00 00 8b 03 89 44 24 20 48 8d bc 24 [ 63.124313][ T8801] RSP: 0018:ffffc900021876e0 EFLAGS: 00010247 [ 63.130390][ T8801] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000000 [ 63.138612][ T8801] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900021877d8 [ 63.146665][ T8801] RBP: ffffc90002187a20 R08: ffffffff85db5e2b R09: ffff8880a9276010 [ 63.154659][ T8801] R10: ffffed101524eddd R11: 0000000000000000 R12: ffff8880a9276000 [ 63.162710][ T8801] R13: dffffc0000000000 R14: ffff88808c278000 R15: 1ffff92000430ee5 [ 63.170673][ T8801] FS: 000000000236b880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 63.179581][ T8801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.186141][ T8801] CR2: 0000000020003004 CR3: 0000000096c8e000 CR4: 00000000001406e0 [ 63.194105][ T8801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.202072][ T8801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.210025][ T8801] Call Trace: [ 63.213336][ T8801] ? nldev_get_chardev+0xa20/0xa20 [ 63.218449][ T8801] rdma_nl_rcv+0x701/0xa20 [ 63.222872][ T8801] netlink_unicast+0x766/0x920 [ 63.227629][ T8801] netlink_sendmsg+0xa2b/0xd40 [ 63.232430][ T8801] ? netlink_getsockopt+0x9f0/0x9f0 [ 63.237648][ T8801] ____sys_sendmsg+0x4f7/0x7f0 [ 63.242425][ T8801] __sys_sendmsg+0x1ed/0x290 [ 63.247012][ T8801] ? check_preemption_disabled+0xb4/0x260 [ 63.252866][ T8801] ? debug_smp_processor_id+0x9/0x20 [ 63.258244][ T8801] ? debug_smp_processor_id+0x1c/0x20 [ 63.263601][ T8801] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 63.269674][ T8801] ? prepare_exit_to_usermode+0x221/0x5b0 [ 63.275387][ T8801] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 63.281207][ T8801] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 63.286684][ T8801] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 63.292391][ T8801] ? do_syscall_64+0x1d/0x1c0 [ 63.297047][ T8801] __x64_sys_sendmsg+0x7f/0x90 [ 63.301800][ T8801] do_syscall_64+0xf7/0x1c0 [ 63.306309][ T8801] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.312200][ T8801] RIP: 0033:0x4403d9 [ 63.316085][ T8801] 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 [ 63.335675][ T8801] RSP: 002b:00007ffdd91184f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.344128][ T8801] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 [ 63.352088][ T8801] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 [ 63.360077][ T8801] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 63.368034][ T8801] R10: 000000000000004a R11: 0000000000000246 R12: 0000000000401c60 [ 63.376022][ T8801] R13: 0000000000401cf0 R14: 0000000000000000 R15: 0000000000000000 [ 63.383987][ T8801] Modules linked in: [ 63.388333][ T8801] ---[ end trace b42baeb94f28da04 ]--- [ 63.394032][ T8801] RIP: 0010:nldev_stat_set_doit+0x60d/0xdd0 [ 63.399953][ T8801] Code: f8 00 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05 e8 56 d4 d8 fb 48 8b 9c 24 f8 00 00 00 48 83 c3 04 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 9d 05 00 00 8b 03 89 44 24 20 48 8d bc 24 [ 63.419597][ T8801] RSP: 0018:ffffc900021876e0 EFLAGS: 00010247 [ 63.425656][ T8801] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000000 [ 63.433887][ T8801] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900021877d8 [ 63.441892][ T8801] RBP: ffffc90002187a20 R08: ffffffff85db5e2b R09: ffff8880a9276010 [ 63.449900][ T8801] R10: ffffed101524eddd R11: 0000000000000000 R12: ffff8880a9276000 [ 63.457867][ T8801] R13: dffffc0000000000 R14: ffff88808c278000 R15: 1ffff92000430ee5 [ 63.465893][ T8801] FS: 000000000236b880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 63.474857][ T8801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.481500][ T8801] CR2: 0000000020003004 CR3: 0000000096c8e000 CR4: 00000000001406e0 [ 63.489582][ T8801] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.497550][ T8801] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.505634][ T8801] Kernel panic - not syncing: Fatal exception [ 63.513257][ T8801] Kernel Offset: disabled [ 63.517637][ T8801] Rebooting in 86400 seconds..