kernel panic at /syzkaller/managers/main/kernel/kern/include/kref.h:68, from core 3: assertion failed: kref_refcnt(kref) > 0
Stack Backtrace on Core 3:
#01 [<0xffffffffc200a3ac>] in backtrace at src/kdebug.c:229
#02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268
#03 [<0xffffffffc2007b9b>] in kref_put at include/kref.h:68
#04 [<0xffffffffc2007ec6>] in remove_fd_tap at src/fdtap.c:136
#05 [<     [inline]     >] in handle_tap_req at src/syscall.c:2328
#05 [<0xffffffffc2058dbc>] in sys_tap_fds at src/syscall.c:2348
#06 [<0xffffffffc2059f59>] in syscall at src/syscall.c:2465
#07 [<0xffffffffc205a124>] in run_local_syscall at src/syscall.c:2500
#08 [<0xffffffffc205a659>] in prep_syscalls at src/syscall.c:2520
#09 [<0xffffffffc20ac10a>] in sysenter_callwrapper at arch/x86/trap.c:854