audit: type=1400 audit(1560474084.080:8): avc: denied { read } for pid=2238 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2504 at net/ipv4/tcp.c:2193 tcp_close+0xd15/0x10a0 net/ipv4/tcp.c:2193 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 2504 Comm: syz-executor.0 Not tainted 4.9.181+ #7 ffff8801c976fb90 ffffffff81b57db1 0000000000000000 ffffffff82a3a960 00000000ffffffff 0000000000000000 0000000000000009 ffff8801c976fc70 ffffffff813fd56a 0000000041b58ab3 ffffffff82e311ea ffffffff813fd391 Call Trace: [<000000000bc98afa>] __dump_stack lib/dump_stack.c:15 [inline] [<000000000bc98afa>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000004f02f18f>] panic+0x1d9/0x3bd kernel/panic.c:180 [<00000000ffc26756>] __warn.cold+0x2f/0x2f kernel/panic.c:546 [<0000000037c7bb8c>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589 [<000000008a70e627>] tcp_close+0xd15/0x10a0 net/ipv4/tcp.c:2193 [<000000001eaaf02b>] inet_release+0xf2/0x1c0 net/ipv4/af_inet.c:430 [<00000000ac319bca>] inet6_release+0x53/0x80 net/ipv6/af_inet6.c:455 [<00000000c1e7636f>] __sock_release+0xd3/0x2c0 net/socket.c:605 [<0000000011da64b0>] sock_close+0x1b/0x30 net/socket.c:1060 [<000000003be36271>] __fput+0x274/0x720 fs/file_table.c:208 [<000000006dd57389>] ____fput+0x16/0x20 fs/file_table.c:244 [<00000000ba988922>] task_work_run+0x108/0x180 kernel/task_work.c:116 [<000000001f4cf3a6>] tracehook_notify_resume include/linux/tracehook.h:191 [inline] [<000000001f4cf3a6>] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:163 [<00000000805d5879>] prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] [<00000000805d5879>] syscall_return_slowpath arch/x86/entry/common.c:266 [inline] [<00000000805d5879>] do_syscall_64+0x3ab/0x5c0 arch/x86/entry/common.c:293 [<00000000b39c76a7>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Kernel Offset: disabled Rebooting in 86400 seconds..