[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.482317][ T27] audit: type=1800 audit(1582599801.921:25): pid=8579 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.501377][ T27] audit: type=1800 audit(1582599801.921:26): pid=8579 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.547781][ T27] audit: type=1800 audit(1582599801.921:27): pid=8579 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 '10.128.15.197' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.073859][ T8731] IPVS: ftp: loaded support on port[0] = 21 [ 67.107271][ T8731] BUG: unable to handle page fault for address: ffffed1018744087 [ 67.115004][ T8731] #PF: supervisor read access in kernel mode [ 67.121173][ T8731] #PF: error_code(0x0000) - not-present page [ 67.127131][ T8731] PGD 21ffef067 P4D 21ffef067 PUD 12fff6067 PMD 0 [ 67.133622][ T8731] Oops: 0000 [#1] PREEMPT SMP KASAN [ 67.138806][ T8731] CPU: 0 PID: 8731 Comm: syz-executor105 Not tainted 5.6.0-rc3-syzkaller #0 [ 67.147487][ T8731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.157543][ T8731] RIP: 0010:ethnl_update_bitset32+0x1afe/0x2380 [ 67.163805][ T8731] Code: 24 30 44 89 fe 83 e6 1f 31 ff e8 6d a8 d4 fa 41 83 e7 1f 74 44 48 85 db 74 3f 48 8b 44 24 50 49 8d 1c 86 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 06 07 00 00 8b 1b 4c 89 f9 f6 d9 d3 e3 d3 [ 67.183464][ T8731] RSP: 0018:ffffc9000202f6c0 EFLAGS: 00010a07 [ 67.189507][ T8731] RAX: 1ffff11018744087 RBX: ffff8880c3a2043c RCX: 0000000000000000 [ 67.197559][ T8731] RDX: dffffc0000000000 RSI: 0000000000000010 RDI: 0000000000000000 [ 67.205518][ T8731] RBP: ffffc9000202f7b0 R08: ffffffff86a264c3 R09: ffffffff83bbc3c7 [ 67.213478][ T8731] R10: ffff8880a7002040 R11: 0000000000000004 R12: dffffc0000000000 [ 67.221429][ T8731] R13: ffffc9000202fab0 R14: ffff8880a3a20440 R15: 0000000000000010 [ 67.229730][ T8731] FS: 0000000001948880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 67.238674][ T8731] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.245242][ T8731] CR2: ffffed1018744087 CR3: 00000000a8d75000 CR4: 00000000001406f0 [ 67.253246][ T8731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.261196][ T8731] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.269148][ T8731] Call Trace: [ 67.272433][ T8731] ? memcpy+0x49/0x60 [ 67.276395][ T8731] ethnl_update_bitset+0x3c/0x50 [ 67.281753][ T8731] ethnl_set_linkmodes+0x5d4/0xf80 [ 67.286851][ T8731] genl_rcv_msg+0xf15/0x13e0 [ 67.291435][ T8731] netlink_rcv_skb+0x19e/0x3e0 [ 67.296186][ T8731] ? genl_unbind+0x250/0x250 [ 67.301006][ T8731] genl_rcv+0x28/0x40 [ 67.304983][ T8731] netlink_unicast+0x766/0x920 [ 67.309742][ T8731] netlink_sendmsg+0xa2b/0xd40 [ 67.314613][ T8731] ? netlink_getsockopt+0x9f0/0x9f0 [ 67.320784][ T8731] ____sys_sendmsg+0x4f7/0x7f0 [ 67.325564][ T8731] __sys_sendmsg+0x1ed/0x290 [ 67.330252][ T8731] ? check_preemption_disabled+0xb4/0x260 [ 67.335957][ T8731] ? debug_smp_processor_id+0x9/0x20 [ 67.341230][ T8731] ? __kasan_check_write+0x14/0x20 [ 67.346325][ T8731] ? __fpregs_load_activate+0x194/0x220 [ 67.351985][ T8731] ? switch_fpu_return+0xe/0x10 [ 67.356826][ T8731] ? prepare_exit_to_usermode+0x221/0x5b0 [ 67.362561][ T8731] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.368017][ T8731] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 67.374073][ T8731] ? do_syscall_64+0x1d/0x1c0 [ 67.378796][ T8731] __x64_sys_sendmsg+0x7f/0x90 [ 67.383544][ T8731] do_syscall_64+0xf7/0x1c0 [ 67.388150][ T8731] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.394023][ T8731] RIP: 0033:0x445399 [ 67.397895][ T8731] Code: 44 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 2b d2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.417569][ T8731] RSP: 002b:00007fff99a55008 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.425964][ T8731] RAX: ffffffffffffffda RBX: 00007fff99a55020 RCX: 0000000000445399 [ 67.433915][ T8731] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 67.441877][ T8731] RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000bb1414ac [ 67.449865][ T8731] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 67.457817][ T8731] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 67.465789][ T8731] Modules linked in: [ 67.469756][ T8731] CR2: ffffed1018744087 [ 67.474031][ T8731] ---[ end trace f1bb1bdbf516c73d ]--- [ 67.479479][ T8731] RIP: 0010:ethnl_update_bitset32+0x1afe/0x2380 [ 67.485701][ T8731] Code: 24 30 44 89 fe 83 e6 1f 31 ff e8 6d a8 d4 fa 41 83 e7 1f 74 44 48 85 db 74 3f 48 8b 44 24 50 49 8d 1c 86 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 06 07 00 00 8b 1b 4c 89 f9 f6 d9 d3 e3 d3 [ 67.505304][ T8731] RSP: 0018:ffffc9000202f6c0 EFLAGS: 00010a07 [ 67.511414][ T8731] RAX: 1ffff11018744087 RBX: ffff8880c3a2043c RCX: 0000000000000000 [ 67.519371][ T8731] RDX: dffffc0000000000 RSI: 0000000000000010 RDI: 0000000000000000 [ 67.527341][ T8731] RBP: ffffc9000202f7b0 R08: ffffffff86a264c3 R09: ffffffff83bbc3c7 [ 67.535295][ T8731] R10: ffff8880a7002040 R11: 0000000000000004 R12: dffffc0000000000 [ 67.543264][ T8731] R13: ffffc9000202fab0 R14: ffff8880a3a20440 R15: 0000000000000010 [ 67.551220][ T8731] FS: 0000000001948880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 67.560218][ T8731] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.566868][ T8731] CR2: ffffed1018744087 CR3: 00000000a8d75000 CR4: 00000000001406f0 [ 67.574825][ T8731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.582810][ T8731] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.590913][ T8731] Kernel panic - not syncing: Fatal exception [ 67.598788][ T8731] Kernel Offset: disabled [ 67.603130][ T8731] Rebooting in 86400 seconds..