used since dosetitimer() does this anyway. The compat functions hadn't
been updated since ITIMER_MONOTONIC was introduced, so they reported
that that ITIMER_MONOTONIC timer was invalid.
returned on error. Therefore we must restrict the lengths of any
buffers to NETBSD32_SSIZE_MAX with compat32 to avoid garbage return
values.
Fixes ATF lib/libc/sys/t_write:write_err.
make _lwp_park return the remaining time to sleep in the "ts" argument
if it is a relative timestamp, as discussed in tech-kern.
for compat32. Thanks skrll@ for some cleanup tips.
Only include elf32 hooks if we have elf32 defined and elf32 is not the
"native" emulation. This allows for having compat_netbsd32 without
elf32 (although it's probably not too useful), and also enables arm's
old-ABI usage of compat_netbsd32.
Linux is less strict than NetBSD and permits namelen to be larger
than valid struct sockaddr_in*. If this is the case, truncate the value
to the correct size, so that NetBSD networking does not return an error.
Reviewed by kamil
Passing a negative value to these legacy compat ioctls results in
left shift on a negative value which is undefined behaviour and results
in the tty (at least, possibly other things) locking up.
The argument to the ioctl should always be > 0. Return EINVAL otherwise.
While here, adjustments to code style to match current guidelines.
Found by UBSan.
Reported-by: syzbot+39cd551a05298b222756@syzkaller.appspotmail.com
The poorly named uvm.h is generally supposed to be for uvm-internal
users only.
- Narrow it to files that actually need it -- mostly files that need
to query whether curlwp is the pagedaemon, which should maybe be
exposed by an external header.
- Use uvm_extern.h where feasible and uvm_*.h for things not exposed
by it. We should split up uvm_extern.h but this will serve for now
to reduce the uvm.h dependencies.
- Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use
UVMHIST(ubchist), since ubchist is declared in uvm.h but the
reference evaporates if UVMHIST is not defined, so we reduce header
file dependencies.
- Make uvm_device.h and uvm_swap.h independently includable while
here.
ok chs@
test made. Simply invoking this syscall with _valid parameters_ triggers a
fatal fault, because the kernel tries to write to userland addresses.
With specially-crafted parameters it is easy to completely escalate
privileges into the kernel.
Also the size of the allocation is just obviously wrong, but it looks like
the callers are even more wrong, so not gonna fix it for now.
Reported-by: syzbot+b05096f3114b2820d81c@syzkaller.appspotmail.com
This is much better handled by a user-land tool.
Proposed on tech-net here:
https://mail-index.netbsd.org/tech-net/2020/04/22/msg007766.html
Note that the ioctl SIOCGIFINFO_IN6 no longer sets flags. That now
needs to be done using the pre-existing SIOCSIFINFO_FLAGS ioctl.
Compat is fully provided where it makes sense, but trying to turn on
RA handling will obviously throw an error as it no longer exists.
Note that if you use IPv6 temporary addresses, this now needs to be
turned on in dhcpcd.conf(5) rather than in sysctl.conf(5).
- Don't need to count anonpages+filepages any more; clean+unknown+dirty for
each kind of page can be summed to get the totals.
- Track the number of free pages with a counter so that it's one less thing
for the allocator to do, which opens up further options there.
- Remove cpu_count_sync_one(). It has no users and doesn't save a whole lot.
For the cheap option, give cpu_count_sync() a boolean parameter indicating
that a cached value is okay, and rate limit the updates for cached values
to hz.
simonb