[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.057070][ T23] audit: type=1800 audit(1583231449.573:25): pid=8555 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.076667][ T23] audit: type=1800 audit(1583231449.573:26): pid=8555 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.096605][ T23] audit: type=1800 audit(1583231449.583:27): pid=8555 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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 64.429787][ T8706] IPVS: ftp: loaded support on port[0] = 21 [ 64.470514][ T8708] BUG: unable to handle page fault for address: ffffed10188e2a07 [ 64.478749][ T8708] #PF: supervisor read access in kernel mode [ 64.484732][ T8708] #PF: error_code(0x0000) - not-present page [ 64.490695][ T8708] PGD 21ffef067 P4D 21ffef067 PUD 12fff6067 PMD 0 [ 64.497364][ T8708] Oops: 0000 [#1] PREEMPT SMP KASAN [ 64.502555][ T8708] CPU: 0 PID: 8708 Comm: syz-executor068 Not tainted 5.6.0-rc3-syzkaller #0 [ 64.511213][ T8708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.521550][ T8708] RIP: 0010:ethnl_update_bitset32+0x1afe/0x2380 [ 64.527999][ T8708] 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 [ 64.547785][ T8708] RSP: 0018:ffffc900020876c0 EFLAGS: 00010a02 [ 64.554206][ T8708] RAX: 1ffff110188e2a07 RBX: ffff8880c4715038 RCX: 0000000000000000 [ 64.562187][ T8708] RDX: dffffc0000000000 RSI: 000000000000001d RDI: 0000000000000000 [ 64.570853][ T8708] RBP: ffffc900020877b0 R08: ffffffff86a274c3 R09: ffffffff83bbd337 [ 64.578812][ T8708] R10: ffff88809e798180 R11: 0000000000000004 R12: dffffc0000000000 [ 64.586793][ T8708] R13: ffffc90002087ab0 R14: ffff8880a471503c R15: 000000000000001d [ 64.594850][ T8708] FS: 0000000002108880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 64.604722][ T8708] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.611293][ T8708] CR2: ffffed10188e2a07 CR3: 00000000974f3000 CR4: 00000000001406f0 [ 64.619550][ T8708] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.627749][ T8708] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.635889][ T8708] Call Trace: [ 64.639419][ T8708] ? memcpy+0x49/0x60 [ 64.643484][ T8708] ethnl_update_bitset+0x3c/0x50 [ 64.648633][ T8708] ethnl_set_linkmodes+0x5d4/0xf80 [ 64.653767][ T8708] genl_rcv_msg+0xf15/0x13e0 [ 64.658386][ T8708] netlink_rcv_skb+0x19e/0x3e0 [ 64.663225][ T8708] ? genl_unbind+0x250/0x250 [ 64.667803][ T8708] genl_rcv+0x28/0x40 [ 64.672296][ T8708] netlink_unicast+0x766/0x920 [ 64.677059][ T8708] netlink_sendmsg+0xa2b/0xd40 [ 64.681854][ T8708] ? netlink_getsockopt+0x9f0/0x9f0 [ 64.687097][ T8708] ____sys_sendmsg+0x4f7/0x7f0 [ 64.692123][ T8708] __sys_sendmsg+0x1ed/0x290 [ 64.696726][ T8708] ? check_preemption_disabled+0xb4/0x260 [ 64.702695][ T8708] ? debug_smp_processor_id+0x9/0x20 [ 64.708093][ T8708] ? __kasan_check_write+0x14/0x20 [ 64.713211][ T8708] ? __fpregs_load_activate+0x194/0x220 [ 64.718791][ T8708] ? switch_fpu_return+0xe/0x10 [ 64.723750][ T8708] ? prepare_exit_to_usermode+0x221/0x5b0 [ 64.729459][ T8708] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 64.734957][ T8708] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 64.740695][ T8708] ? do_syscall_64+0x1d/0x1c0 [ 64.745451][ T8708] __x64_sys_sendmsg+0x7f/0x90 [ 64.750281][ T8708] do_syscall_64+0xf7/0x1c0 [ 64.754809][ T8708] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.760958][ T8708] RIP: 0033:0x445b39 [ 64.764929][ T8708] Code: e8 ac cb 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 [ 64.784905][ T8708] RSP: 002b:00007ffcf333b318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 64.793300][ T8708] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445b39 [ 64.801374][ T8708] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 64.809339][ T8708] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000bb1414ac [ 64.817313][ T8708] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000fbb3 [ 64.825390][ T8708] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 64.833373][ T8708] Modules linked in: [ 64.837301][ T8708] CR2: ffffed10188e2a07 [ 64.841461][ T8708] ---[ end trace 349460ac7b2df84c ]--- [ 64.847434][ T8708] RIP: 0010:ethnl_update_bitset32+0x1afe/0x2380 [ 64.853665][ T8708] 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 [ 64.873949][ T8708] RSP: 0018:ffffc900020876c0 EFLAGS: 00010a02 [ 64.880025][ T8708] RAX: 1ffff110188e2a07 RBX: ffff8880c4715038 RCX: 0000000000000000 [ 64.888169][ T8708] RDX: dffffc0000000000 RSI: 000000000000001d RDI: 0000000000000000 [ 64.896361][ T8708] RBP: ffffc900020877b0 R08: ffffffff86a274c3 R09: ffffffff83bbd337 [ 64.904325][ T8708] R10: ffff88809e798180 R11: 0000000000000004 R12: dffffc0000000000 [ 64.912743][ T8708] R13: ffffc90002087ab0 R14: ffff8880a471503c R15: 000000000000001d [ 64.920747][ T8708] FS: 0000000002108880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 64.934027][ T8708] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.940851][ T8708] CR2: ffffed10188e2a07 CR3: 00000000974f3000 CR4: 00000000001406f0 [ 64.948819][ T8708] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.956896][ T8708] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.964857][ T8708] Kernel panic - not syncing: Fatal exception [ 64.972543][ T8708] Kernel Offset: disabled [ 64.976948][ T8708] Rebooting in 86400 seconds..