syzbot

SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /dev/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: repeatedly failed to execute the program
proc=4 req=54 state=1 status=67 (errno 9: Bad file descriptor)
Warning! syz-executor[1185] uses SF_SYNC sendfile(2) flag. Please follow up to https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287348.