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nvmutil: don't read urandom fd if fd not open

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yeah. obvious bug

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-18 04:21:18 +00:00
parent 7d5384ebb0
commit 1ecea3247d
1 changed files with 10 additions and 7 deletions
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17
util/nvmutil/nvmutil.c
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@@ -1051,15 +1051,18 @@ rlong(void)
if (fd < 0)
fd = open("/dev/random", O_RDONLY | O_BINARY | O_NONBLOCK);
nr = rw_file_exact(fd, (unsigned char *)&rval,
sizeof(unsigned long), 0, IO_READ, LOOP_EAGAIN,
LOOP_EINTR, MAX_ZERO_RW_RETRY, OFF_ERR);
if (fd > -1) {
if (x_i_close(fd) < 0)
err(errno, "Can't close randomness fd");
nr = rw_file_exact(fd, (unsigned char *)&rval,
sizeof(unsigned long), 0, IO_READ, LOOP_EAGAIN,
LOOP_EINTR, MAX_ZERO_RW_RETRY, OFF_ERR);
if (nr == sizeof(unsigned long))
return rval;
if (x_i_close(fd) < 0)
err(errno, "Can't close randomness fd");
if (nr == sizeof(unsigned long))
return rval;
}
return mix;
}