panic: Assertion error == 0 || error == EINTR || error == ERESTART failed at /syzkaller/managers/main/kernel/sys/net/if_tuntap.c:1316
cpuid = 1
time = 17
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056e81fd0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056e82130
vpanic() at vpanic+0x257/frame 0xfffffe0056e822f0
panic() at panic+0xb5/frame 0xfffffe0056e823b0
tundtor() at tundtor+0x9ef/frame 0xfffffe0056e82440
devfs_destroy_cdevpriv() at devfs_destroy_cdevpriv+0x183/frame 0xfffffe0056e82480
devfs_close_f() at devfs_close_f+0xb6/frame 0xfffffe0056e824c0
_fdrop() at _fdrop+0x5c/frame 0xfffffe0056e824f0
closef() at closef+0x655/frame 0xfffffe0056e826d0
fdescfree() at fdescfree+0xa5e/frame 0xfffffe0056e828b0
exit1() at exit1+0x887/frame 0xfffffe0056e82950
sigexit() at sigexit+0x213/frame 0xfffffe0056e82a70
postsig() at postsig+0x2c5/frame 0xfffffe0056e82bf0
ast_sig() at ast_sig+0x85b/frame 0xfffffe0056e82ea0
ast_handler() at ast_handler+0x2b0/frame 0xfffffe0056e82f10
ast() at ast+0x25/frame 0xfffffe0056e82f30
doreti_ast() at doreti_ast+0x1c/frame 0x826112f10
KDB: enter: panic
[ thread pid 1033 tid 100179 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x258c577(%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         0xfffffe0002bf1850