panic: ASan: Invalid access, 8-byte read at 0xfffffe0059aeb8e8, UMAUseAfterFree(fd)
cpuid = 1
time = 9
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056b4f1b0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056b4f310
vpanic() at vpanic+0x257/frame 0xfffffe0056b4f4d0
panic() at panic+0xb5/frame 0xfffffe0056b4f5a0
kasan_report() at kasan_report+0xdf/frame 0xfffffe0056b4f670
syncache_add() at syncache_add+0xbf8/frame 0xfffffe0056b4f8f0
tcp_input_with_port() at tcp_input_with_port+0x2db3/frame 0xfffffe0056b4fbb0
tcp_input() at tcp_input+0x1f/frame 0xfffffe0056b4fbd0
ip_input() at ip_input+0xaa2/frame 0xfffffe0056b4fcf0
swi_net() at swi_net+0x2b8/frame 0xfffffe0056b4fd90
ithread_loop() at ithread_loop+0x4ec/frame 0xfffffe0056b4fef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056b4ff30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056b4ff30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100033 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25b6f77(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0xffffffff81625b7e  _vprintf+0x1ae
rdx                          0
rbx         0xffffffff827e1820  .str.27
rsp         0xfffffe0056b4f2f0
rbp         0xfffffe0056b4f310
rsi                          0
rdi         0xffffffff816260e9  printf+0x149
r8                           0
r9                  0xffffffff
r10                          0
r11                       0x14
r12         0xfffffe0007821780
r13         0xfffffffffffffffd
r14         0xffffffff827e1820  .str.27
r15                          0
rip         0xffffffff8160fc1e  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x25b6f77(%rip)
db>