every field; some need to stay around.
Fixes a bug where by calling shutdown() on a socket with knotes
will cause the kernel to panic when the kernel closes the socket.
Other access, such as calling kevent() may also trigger the panic.
Debugged with help from Jason and Allen. Patch reviewed by same plus
Itojun and Matt Thomas.
This problem seems to be the same one that FreeBSD saw in their PR
number 54331.
Kernel version _not_ bumped as we will piggyback the bump earlier today.
and the subsequent namei(): inform the kernel portion of
valid filenames and then disallow symlink lookups for
those filenames by means of a hook in namei().
with suggestions from provos@
also, add (currently unused) seqnr field to struct
systrace_replace, from provos@
and make the stack and heap non-executable by default. the changes
fall into two basic catagories:
- pmap and trap-handler changes. these are all MD:
= alpha: we already track per-page execute permission with the (software)
PG_EXEC bit, so just have the trap handler pay attention to it.
= i386: use a new GDT segment for %cs for processes that have no
executable mappings above a certain threshold (currently the
bottom of the stack). track per-page execute permission with
the last unused PTE bit.
= powerpc/ibm4xx: just use the hardware exec bit.
= powerpc/oea: we already track per-page exec bits, but the hardware only
implements non-exec mappings at the segment level. so track the
number of executable mappings in each segment and turn on the no-exec
segment bit iff the count is 0. adjust the trap handler to deal.
= sparc (sun4m): fix our use of the hardware protection bits.
fix the trap handler to recognize text faults.
= sparc64: split the existing unified TSB into data and instruction TSBs,
and only load TTEs into the appropriate TSB(s) for the permissions.
fix the trap handler to check for execute permission.
= not yet implemented: amd64, hppa, sh5
- changes in all the emulations that put a signal trampoline on the stack.
instead, we now put the trampoline into a uvm_aobj and map that into
the process separately.
originally from openbsd, adapted for netbsd by me.
- Write label to all netbsd (type 169) mbr partitions (even if they don't
already have a label).
- Update any label found in sector LABELSECTOR and sector 0.
Latter change makes DIOCWDINFO (etc) work on raidframe (fixing bin/22529).
The patch below (hopefully) improves some signaling problems
found by Nathan.
It also contains some cleanup of the sa_upcall_userret() function
removing any sleep calls using PCATCH.
Unblocked threads now only use an upcall stack after they
acquire the virtual CPU.
This prevents unblocked threads from stealing all available
upcall stacks.
Tested by Nick Hudson.
If FAST_IPSEC is configured, attach fast-ipsec transforms after
autoconfiguring devices (perhaps including crypto hardware)
but before starting up network-device packet input.
pseudo-device to init_main(), so the framework is ready for
registration requests at autoconfiguration time.
Thanks to Quentin Garnier for confirming the change was required, and
for testing a similar fix.
wrstuden