Failure to pin the memory pointed to by a TrusteeValue (a uintptr)
can lead to the GC collecting the memory while it is still being
referenced.

Fixes #79923

Change-Id: Ie28884856298cd60693c903843be6aa06a6a6964
Reviewed-on: https://go-review.googlesource.com/c/sys/+/789000
Auto-Submit: Damien Neil <[email protected]>
LUCI-TryBot-Result: [email protected] <[email protected]>
Reviewed-by: Quim Muntal <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Change-Id: Iba1e8753f68af6ac6ee741953b1efdb24183a204
GitHub-Last-Rev: ec88943
GitHub-Pull-Request: #280
Reviewed-on: https://go-review.googlesource.com/c/sys/+/790440
Reviewed-by: Tobias Klauser <[email protected]>
LUCI-TryBot-Result: [email protected] <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>

NewNTString initializes an NTString with RtlInitString, which cannot accurately represent sources whose NUL-terminated byte length exceeds MAX_USHORT. Reject strings whose byte representation cannot fit in the uint16 length fields before calling RtlInitString.

Add a boundary round-trip test for NTString.

Fixes golang/go#80103

Change-Id: Id38882a952330305e6c23d0adc86a8bf7920d30e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/793100
LUCI-TryBot-Result: [email protected] <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Emmanuel Odeke <[email protected]>
Auto-Submit: Damien Neil <[email protected]>
Reviewed-by: Quim Muntal <[email protected]>
Reviewed-by: Alex Brainman <[email protected]>
Reviewed-by: Damien Neil <[email protected]>

This extends a pattern implemented on arm64 by CL 21971
to all arches.

This is safe to do because epoll_pwait was added in Linux 2.6.19
and x/sys's go.mod file sets go 1.25.0 which has a minimum Linux
version of 3.2.

epoll_wait is a legacy syscall that is being left behind
- some newer arches (like arm64) do not implement it
- libc implementations never call it
- seccomp allow lists do not include it

epoll_pwait is a complete superset of epoll_wait: it adds a new
sigmask argument, but according to the docs:

  The sigmask argument may be specified as NULL, in which
  case epoll_pwait() is equivalent to epoll_wait().

This might have the inverse downside where someone wrote a seccomp
filter allowing epoll_wait but not epoll_pwait, but given that the
rest of the ecosystem (libcs, ...) uses epoll_pwait this seems
unlikely.

Fixes golang/go#80080

Change-Id: Ief3b7799e35c61cec328c328422155a29fc02ae4
Reviewed-on: https://go-review.googlesource.com/c/sys/+/792700
LUCI-TryBot-Result: [email protected] <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Tobias Klauser <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Tobias Klauser <[email protected]>

Kernel release strings such as "3.4.35_hi3535" on some Synology devices
failed to parse because only dash and plus suffixes were stripped.
Parse the leading digits of each component instead, mirroring the Go
runtime fix.

This copies the implementation from the Go runtime's parseRelease as
updated in CL 781800.

Fixes golang/go#80094

Co-authored-by: Brad Fitzpatrick <[email protected]>
Change-Id: I41f8fd0a1d6c012eebd5368e623b42e99220d1a3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/793760
Reviewed-by: Jorropo <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: [email protected] <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Junyang Shao <[email protected]>