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vmm: Fix handling of errors from subyte()

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subyte() returns -1 upon an error, not an errno value.

MFC after:	1 week
Fixes:	e17eca3276 ("vmm: Avoid embedding cpuset_t ioctl ABIs")

(cherry picked from commit 6adf554abd1c848d2c9ab7ea8a7fb7dd20a0c186)
This commit is contained in:
Mark Johnston 2023-12-25 20:43:51 -05:00
parent fecd8e111a
commit 266eefe7f4
1 changed files with 5 additions and 3 deletions
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8
sys/amd64/vmm/vmm_dev.c
View file

@ -629,10 +629,12 @@ vmmdev_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag,
p = (uint8_t *)vmrun->cpuset +
sizeof(cpuset_t);
while (error == 0 &&
p < (uint8_t *)vmrun->cpuset +
while (p < (uint8_t *)vmrun->cpuset +
vmrun->cpusetsize) {
error = subyte(p++, 0);
if (subyte(p++, 0) != 0) {
error = EFAULT;
break;
}
}
}
}