[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.570677][ T28] audit: type=1800 audit(1580089248.590:25): pid=8611 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.589812][ T28] audit: type=1800 audit(1580089248.590:26): pid=8611 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.616126][ T28] audit: type=1800 audit(1580089248.600:27): pid=8611 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 '10.128.1.21' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 69.468610][ T8764] kasan: CONFIG_KASAN_INLINE enabled [ 69.474137][ T8764] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 69.482443][ T8764] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 69.489381][ T8764] CPU: 0 PID: 8764 Comm: syz-executor778 Not tainted 5.5.0-rc7-syzkaller #0 [ 69.498825][ T8764] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.508892][ T8764] RIP: 0010:strlen+0x27/0x60 [ 69.513483][ T8764] Code: 00 00 00 55 48 89 e5 41 57 41 56 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df 48 89 fb 0f 1f 80 00 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 0b 80 3b 00 48 8d 5b 01 75 e7 eb 13 89 d9 [ 69.533162][ T8764] RSP: 0018:ffffc900020670b8 EFLAGS: 00010207 [ 69.539301][ T8764] RAX: 0000000000000042 RBX: 0000000000000214 RCX: ffff888094fb61c0 [ 69.547258][ T8764] RDX: 0000000000000000 RSI: ffff8880a019e118 RDI: 0000000000000214 [ 69.555234][ T8764] RBP: ffffc900020670d0 R08: ffffffff86adaefd R09: ffffed1014033c23 [ 69.563215][ T8764] R10: ffffed1014033c23 R11: 0000000000000000 R12: ffff88809f80b800 [ 69.571169][ T8764] R13: ffff8880a019e118 R14: 0000000000000214 R15: dffffc0000000000 [ 69.579399][ T8764] FS: 0000000000cc0940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 69.588515][ T8764] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.595218][ T8764] CR2: 0000000020000300 CR3: 00000000a20be000 CR4: 00000000001406f0 [ 69.603195][ T8764] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.611162][ T8764] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.619122][ T8764] Call Trace: [ 69.622416][ T8764] ip_set_comment_free+0x54/0xd0 [ 69.627351][ T8764] hash_net4_add+0x11cb/0x2c90 [ 69.632098][ T8764] hash_net4_uadt+0x72e/0x990 [ 69.636761][ T8764] ? hash_net4_uadt+0x990/0x990 [ 69.641644][ T8764] call_ad+0x10a/0x5b0 [ 69.645784][ T8764] ? __nla_parse+0x41/0x50 [ 69.650180][ T8764] ip_set_ad+0x6a9/0x860 [ 69.654426][ T8764] ip_set_uadd+0x37/0x50 [ 69.658666][ T8764] ? ip_set_dump+0x160/0x160 [ 69.663242][ T8764] nfnetlink_rcv_msg+0x9ae/0xcd0 [ 69.668198][ T8764] ? cap_capable+0x25b/0x290 [ 69.672779][ T8764] ? cap_capable+0x25b/0x290 [ 69.677353][ T8764] netlink_rcv_skb+0x19e/0x3e0 [ 69.682121][ T8764] ? nfnetlink_bind+0x250/0x250 [ 69.686971][ T8764] nfnetlink_rcv+0x1e0/0x1e50 [ 69.691646][ T8764] ? rcu_lock_release+0x9/0x30 [ 69.696416][ T8764] ? rcu_lock_release+0x21/0x30 [ 69.701272][ T8764] ? netlink_deliver_tap+0x142/0x880 [ 69.706556][ T8764] netlink_unicast+0x767/0x920 [ 69.711327][ T8764] netlink_sendmsg+0xa2c/0xd50 [ 69.716159][ T8764] ? netlink_getsockopt+0x9f0/0x9f0 [ 69.721595][ T8764] ____sys_sendmsg+0x4f7/0x7f0 [ 69.727366][ T8764] __sys_sendmsg+0x1ed/0x290 [ 69.731960][ T8764] ? check_preemption_disabled+0xb4/0x260 [ 69.737692][ T8764] ? debug_smp_processor_id+0x9/0x20 [ 69.743087][ T8764] ? debug_smp_processor_id+0x1c/0x20 [ 69.748453][ T8764] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 69.754546][ T8764] ? prepare_exit_to_usermode+0x221/0x5b0 [ 69.760258][ T8764] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 69.765981][ T8764] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.771425][ T8764] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 69.777146][ T8764] ? do_syscall_64+0x1d/0x1c0 [ 69.781805][ T8764] __x64_sys_sendmsg+0x7f/0x90 [ 69.786553][ T8764] do_syscall_64+0xf7/0x1c0 [ 69.791097][ T8764] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.797403][ T8764] RIP: 0033:0x4429a9 [ 69.801382][ T8764] Code: e8 ac e8 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.821189][ T8764] RSP: 002b:00007ffe73499dd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.829584][ T8764] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004429a9 [ 69.837669][ T8764] RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004 [ 69.845807][ T8764] RBP: 0000000000000000 R08: 00000000004037b0 R09: 00000000004037b0 [ 69.853813][ T8764] R10: 00000000004037b0 R11: 0000000000000246 R12: 0000000000403720 [ 69.861805][ T8764] R13: 00000000004037b0 R14: 0000000000000000 R15: 0000000000000000 [ 69.869764][ T8764] Modules linked in: [ 69.873698][ T8764] ---[ end trace 001cd1d707cc96c7 ]--- [ 69.879179][ T8764] RIP: 0010:strlen+0x27/0x60 [ 69.883754][ T8764] Code: 00 00 00 55 48 89 e5 41 57 41 56 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df 48 89 fb 0f 1f 80 00 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 0b 80 3b 00 48 8d 5b 01 75 e7 eb 13 89 d9 [ 69.903403][ T8764] RSP: 0018:ffffc900020670b8 EFLAGS: 00010207 [ 69.909510][ T8764] RAX: 0000000000000042 RBX: 0000000000000214 RCX: ffff888094fb61c0 [ 69.917520][ T8764] RDX: 0000000000000000 RSI: ffff8880a019e118 RDI: 0000000000000214 [ 69.925505][ T8764] RBP: ffffc900020670d0 R08: ffffffff86adaefd R09: ffffed1014033c23 [ 69.933504][ T8764] R10: ffffed1014033c23 R11: 0000000000000000 R12: ffff88809f80b800 [ 69.941499][ T8764] R13: ffff8880a019e118 R14: 0000000000000214 R15: dffffc0000000000 [ 69.949546][ T8764] FS: 0000000000cc0940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 69.958518][ T8764] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.965098][ T8764] CR2: 0000000020000300 CR3: 00000000a20be000 CR4: 00000000001406f0 [ 69.973089][ T8764] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.981261][ T8764] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.989301][ T8764] Kernel panic - not syncing: Fatal exception in interrupt [ 69.997727][ T8764] Kernel Offset: disabled [ 70.002105][ T8764] Rebooting in 86400 seconds..