Do not unconditionally fork() after accept(). accept() can
return -1 due to an interrupted system call (i.e. SIGCHLD).
If we fork in that case ftpd can get into an
accept()/SIGCHLD/fork/[fail]/repeat loop.
Reported-by: fabian <fabian.duelli@bluewin.ch>
Obtained from: DragonflyBSD
MFC after: 1 month
of releases. The -DNOCRYPT build option still exists for anyone who
really wants to build non-cryptographic binaries, but the "crypto"
release distribution is now part of "base", and anyone installing from a
release will get cryptographic binaries.
Approved by: re (scottl), markm
Discussed on: freebsd-current, in late April 2004
(and it appears possible throughout ftpd(8) source.)
It is not a mere issue of style: Null pointers in C
seem to have been mistaken one way or another quite often.
of the current user, not root. This will allow neat things
like matching anonymous FTP data traffic with a single ipfw(8)
rule:
ipfw add ... tcp from any to any uid ftp
Note that the control connection socket still belongs to the
user ftpd(8) was started from, usually root.
PR: bin/65928
Submitted by: Eugene Grosbein <eugen at grosbein.pp.ru>
MFC after: 1 month
Reducing "/+./" strings to "/"
Reducing "/[^/]+/../" to "/"
o Don't send an OACK when the result of the [RW]RQ is an error.
These changes allow tftpd to interact with pxelinux.bin from the syslinux
package.
Whilst the path reducing code doesn't properly handle situations where the
path component before the "/../" is a symlink to (say) ".", I would suggest
that it does the right thing in terms of the clients perception of what
their path string actually represents. This seems better than using
realpath() and breaking environments where symlinks point outside of the
directory hierarchy that tftpd is configured to allow.
(and that is for now being worked around by a binutils patch).
The rtld code tested &_DYNAMIC against 0 to see whether rtld itself
was built as PIC or not. While the sparc64 MD code did not rely
on the preset value of the GOT slot for _DYNAMIC any more due
to previous binutils changes, it still used to not be 0, so
that this check did work. The new binutils do however initialize
this slot with 0. As a consequence, rtld would not properly initialize
itself and crash.
Fix that by introducing a new macro, RTLD_IS_DYNAMIC, to take the role
of this test. For sparc64, it is implemented using the rtld_dynamic()
code that was already there. If an architecture does not provide its
own implementation, we default to the old check.
While being there, mark _DYNAMIC as a weak symbol in the sparc64
rtld_start.S. This is needed in the LDSCRIPT case, which is however
not currently supported for want of an actual ldscript.
Sanity checked with md5 on alpha, amd64, i386 and ia64.
stable ld.so. We need to revisit the rtld-elf/sparc64/rtld_start.S
rev. 1.5 and rtld-elf/sparc64/rtld_machdep.h rev. 1.5, which was
suppose to allow stock Binutils 2.13 (and later) to be used.
eg:
[foo]
...
matches any executable 'foo'
[/usr/bin/foo/]
...
matches any executable under the directory /usr/bin/foo/
Exact matches continue to function as before.
PR: bin/66769
Submitted-by: Dan Nelson
with the correct alignment. This is important because this calls to
library static constructors are made from here. The bug in the old crt*.s
files hid this because in this case, two wrongs do indeed make a right.
Also, call _rtld_bind() with the correct alignment, because it calls back
into the pthread library locking functions. If things happen just
the wrong way, we get a SIG10 due to the broken stack alignment.
This adds the former ports registered groups: proxy and authpf as well as
the proxy user. Make sure to run mergemaster -p in oder to complete make
installworld without errors.
This also provides the passive OS fingerprints from OpenBSD (pf.os) and an
example pf.conf.
For those who want to go without pf; it provides a NO_PF knob to make.conf.
__FreeBSD_version will be bumped soon to reflect this and to be able to
change ports accordingly.
Approved by: bms(mentor)
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).
There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.
Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".
Tested on: i386 sparc64
libexec/ftp-proxy - ftp proxy for pf
sbin/pfctl - equivalent to sbin/ipf
sbin/pflogd - deamon logging packets via if_pflog in pcap format
usr.sbin/authpf - authentification shell to modify pf rulesets
Bring along some altq headers used to satisfy pfctl/authpf compile. This
helps to keep the diff down and will make it easy to have a altq-patchset
use the full powers of pf.
Also make sure that the pf headers are installed.
This does not link anything to the build. There will be a NO_PF switch for
make.conf once pf userland is linked.
Approved by: bms(mentor)
While I'm here, sync the usage() synopsis with the manual page synopsis:
make the [-i | -s] explicit and sort the options alphabetically.
Reminded by: ru
MFC after: 3 days
ever since rev. 1.1 of bootpd.c.
While I'm here, rearrange the synopsis a bit: sort the options and
clarify that -i and -s are mutually exclusive.
Reported by: Atanas Buchvarov <nasko@nove.bg>
MFC after: 3 days
says they may not modify existing files through FTP.
Renaming a file is effectively a way to modify it.
For instance, if a malicious party is unable to delete or overwrite
a sensitive file, they can nevertheless rename it to a hidden name
and then upload a troyan horse under the guise of the old file name.
contents in reply to a RETR command. Such clients consider RETR
as a way to tell a file from a directory. Mozilla is an example.
PR: bin/62232
Submitted by: Bob Finch <bob+freebsd <at> nas <dot> com>
MFC after: 1 week
- Unify the conditional assignments section so that architectural
exclusions come first, then options and !options, sorted by the
option name, also in directory order, then architecture specific
sections, sorted by the architecture name, with i386 being a
traditional exception.
Prodded by: bde
However, the code did allow deletion of files. Make deleting require the -m
flag, too.
PR: bin/60809
Submitted by: Alexander Melkov <melkov@comptek.ru>
constants NG_*SIZ that include the trailing NUL byte. This change
is mostly mechanical except for the replacement of a couple of snprintf()
and sprintf() calls with strlcpy.
(libmap available) and 1 for failure. Assign this return to the
global 'libmap_disable' variable in rtld.c.
This totally prevents any libmap functions from being called after
lm_init() if no config file is present.
Previously, there were two copies of telnet; a non-crypto version
that lived in the usual places, and a crypto version that lived in
crypto/telnet/. The latter was built in a broken manner somewhat akin
to other "contribified" sources. This meant that there were 4 telnets
competing with each other at build time - KerberosIV, Kerberos5,
plain-old-secure and base. KerberosIV is no longer in the running, but
the other three took it in turns to jump all over each other during a
"make buildworld".
As the crypto issue has been clarified, and crypto _calls_ are not
a problem, crypto/telnet has been repo-copied to contrib/telnet,
and with this commit, all telnets are now "contribified". The contrib
path was chosen to not destroy history in the repository, and differs
from other contrib/ entries in that it may be worked on as "normal"
BSD code. There is no dangerous crypto in these sources, only a
very weak system less strong than enigma(1).
Kerberos5 telnet and Secure telnet are now selected by using the usual
macros in /etc/make.conf, and the build process is unsurprising and
less treacherous.
Rationale:
SIGURG is configured by ftpd to interrupt system calls, which is useful
during data transfers. However, SIGURG could interrupt I/O on the
control channel as well, which was mistaken for the end of the session.
A practical example could be aborting the download of a tiny file,
when the abort sequence reached ftpd after ftpd had passed the file
data to the system and returned to its command loop.
Reported by: ceri
MFC after: 1 week
- always check the return value from getc(3) for EOF;
- if the attempt to read the TELNET command byte has
returned EOF, exit from the loop instead of using
the EOF value as a normal character.
MFC after: 1 week
rtld. When _DYNAMIC is referenced normally from C the global offset
table is used implicitly, but newer versions of binutils don't initialize
it statically in the binary, so this doesn't work until rtld is relocated,
which _DYNAMIC is needed for... So, as on other systems with the same
problem, we disassemble a call instruction to _DYNAMIC in order to get
its address.
Setting the LD_DUMP_REL_PRE or LD_DUMP_REL_POST environment variables
cause rtld-elf to output a table of all relocations.
This is useful for debugging.
as the source of defaults for terminal device parameters.
- Do duplucate code reduction and simplification enabled by
the above.
Reviewed by: green
MFC after: 1 month
A PPP login program is started _automatically_ (i.e., without
human intervention) even with the "pl" capability unset, as soon
as a PPP frame is detected. But with "pl" set, a PPP login program
is started independently of the result of PPP detection (which is
rendered unnecessary then,) i.e. _unconditionally_.
don't reveal the info in reply to the SYST command.
Get rid of using the "unix" macro at the same time. It was a rather
poor way to check if the system was Unix since there were quite a
few Unix clones out there whose cc didn't define "unix" (e.g.,
NetBSD.) It was also sensitive to the C standard used, which caused
unnecessary trouble: With -std=c99, it should have been "__unix__",
and so on.
PR: bin/50690
Submitted by: Alex Semenyaka <alexs _at_ snark.ratmir.ru>
MFC after: 1 week
information could only be gleaned from the the tty descriptor itself
was neglected, so never did the tty's default settings get copied from
the kernel. Specifically, this caused all manner of ctrl-keys to not
work. Fix this by calling dogettytab() in all the proper places, and
retrieving the terminfo temporarily in dogettytab().
- Use .Va, not .Em, to mark up variable-like identifiers
(capability and database entry names.)
- Stop abusing .Tn (trademark) to emphasize general phrases.
- Spot unmarked capability references.
- Add a missing line break.
Discussed with: ru
MFC after: 1 week
capabilities:
- Mark up capability identifiers.
- Don't squeeze much text into the capability table given the options
will be described below in detail.
- Keep the capability table sorted.
- Use a consistent term for a PPP login program.
MFC after: 1 week
- Initialize "rval", which would be used uninitialized
if al or pl options were set.
- Don't pass an empty string to login(1) as a user name
(this could be triggered by entering a name and then killing it
with backspace or ^U.)
- Don't loop endlessly if the al option specifies a bogus (i.e.,
not alphanumeric) auto-login name.
- Don't pass a bogus user name to login(1) if a good name were
entered and then killed with ^U.
- Exit with status 0, not 1, on receiving an EOF character,
since it's not a error condition.
MFC after: 1 week
While I'm here:
- Let lm_add() call strdup() on its own behalf.
- Use a temporary pointer when parsing constraints; only set the
constraint pointer on a totally successful match.
PR: bin/52783
Submitted by: David P. Reese Jr. <daver@gomerbud.com>
Approved by: re (rwatson)
implementation in case default one provided by rtld is
not suitable.
Consolidate various identical MD lock implementation into
a single file using appropriate machine/atomic.h.
Approved by: re (scottl)
DT_NEEDED links is not flexible enough for cases where dynamically
loaded modules form a dependency cycle.
This should fix an infinite recursion problem encountered by Yahoo.
Approved by: re (jhb)
does not exist.
PR: bin/38303
Submitted by: Woei-Luen, Shyu <m8535@cn.ee.ccu.edu.tw>
the committed patch differs from the submitted one, any inaccuracies are mine.
This is an optional feature, disabled by default.
This will be useful to people testing the various POSIX threading
libraries under -CURRENT but can easily serve other needs.
Remove the unused FILE\ *tf from print_mesg args, and the
bogus passing in of an uninitialised FILE* for it.
Call a timeval 'now' instead of 'clock' due to shadowing.
Remove a nested localtime declaration.
Make the delete invite argument match the ID type, u_int32_t.
Use const for pointers to const items.
Cast to long where printing as such.
Include netinet/in.h for htonl/htons.
Reviewed by: imp
objects.
Programs such as sshd depend on two pointers to the same function being
equal in a given process. However, the current ia64 implementation
ensures that they're equal when both the pointers are instantiated in
the same ELF object. The attached patch ensures that they're equal
irrespective of where they're instantiated.
Reviewed by marcel@ (mentor) and kan@
Kernel:
Change statistics to use the *uptime() timescale (ie: relative to
boottime) rather than the UTC aligned timescale. This makes the
device statistics code oblivious to clock steps.
Change timestamps to bintime format, they are cheaper.
Remove the "busy_count", and replace it with two counter fields:
"start_count" and "end_count", which are updated in the down and
up paths respectively. This removes the locking constraint on
devstat.
Add a timestamp argument to devstat_start_transaction(), this will
normally be a timestamp set by the *_bio() function in bp->bio_t0.
Use this field to calculate duration of I/O operations.
Add two timestamp arguments to devstat_end_transaction(), one is
the current time, a NULL pointer means "take timestamp yourself",
the other is the timestamp of when this transaction started (see
above).
Change calculation of busy_time to operate on "the salami principle":
Only when we are idle, which we can determine by the start+end
counts being identical, do we update the "busy_from" field in the
down path. In the up path we accumulate the timeslice in busy_time
and update busy_from.
Change the byte_* and num_* fields into two arrays: bytes[] and
operations[].
Userland:
Change the misleading "busy_time" name to be called "snap_time" and
make the time long double since that is what most users need anyway,
fill it using clock_gettime(CLOCK_MONOTONIC) to put it on the same
timescale as the kernel fields.
Change devstat_compute_etime() to operate on struct bintime.
Remove the version 2 legacy interface: the change to bintime makes
compatibility far too expensive.
Fix a bug in systat's "vm" page where boot relative busy times would
be bogus.
Bump __FreeBSD_version to 500107
Review & Collaboration by: ken
Introduce a new unlink_object() function and call it in
unload_object() instead. Removing the object in unref_dag() is
too early, rtld calls _fini() function after that and shared
objects might fail resolve their own symbols.
Introdice RTLD_SELF special handle and properly process it within
dlsym() and dlinfo() functions.
The intention is to improve our compatibility with Solaris and
to make a Java port easier.
Partially submitted by: phantom
associated lists:
remove RTLD_GLOBAL objects from global objects list;
remove the parent object from dldags list of its children.
Previosly we were doing that only to the top-level object OF the DAG
being unloaded and all its dependencies were ignored, leading to
mysterious crashes later.
Submitted by: peter (partially)
This makes such natural commands as "MKD ~user/newdir" or "STOR ~/newfile"
do what they are supposed to instead of failing miserably with the
"File not found" error.
This involves a bit of code reorganization. Namely, the code doing
glob(3) expansion has been separated to a function; a new function
has been introduced to do tilde expansion; the latter function is
invoked on a pathname before the former one. Thus behaviour mimicing
that of the Bourne shell has been achieved.
if allowed by their filesystem permissions.
This doesn't break anything since using sendfile(2)
is triggered later by a separate S_ISREG conditional.
PR: bin/20824
MFC after: 1 week
separating its part around chroot(2) from that around initial
chdir(2). This makes the below changes really easy.
Move seteuid(to user's uid) to before calling chdir(2). There are
two goals to achieve by that. First, NFS mounted home directories
with restrictive permissions become accessible (local superuser
can't access them if not mapped to uid 0 on the remote side
explicitly.) Second, all the permissions to the home directory
pathname components become effective; previously a user could be
carried to any local directory despite its permissions since the
chdir(2) was done with euid 0. This reduces possible impact from
FTP server misconfiguration, e.g., assigning a wrong home directory
to a user.
Implement the "/./" feature. Now a guest or user subject to chrooting
may have "/./" in his login directory, which separates his chroot
directory from his home directory inside the chrooted environment.
This works for ftpchroot(5) as well.
PR: bin/17843 bin/23944
directory can be specified for a user or a group.
Add the manpage ftpchroot(5) since the file's format has grown
complex enough.
PR: bin/45327
Portions submitted by: Hideki SAKAMOTO <sakamoto@hlla.is.tsukuba.ac.jp>
MFC after: 1 week
to listen at in daemon mode.
- Use the port by 1 less than the control port as the default
data port instead of always using hard-coded port 20.
Submitted by: roam
MFC after: 1 week
to a pathname that contains '\r' or '\n'.
Together with the earlier STAT bugfix, this must solve
the problem of such pathnames appearing in the FTP control
stream.
up port 20 for an extended period of time and thus lock out all other
users from establishing PORT data connections. Don't hold on to the
bind() while we loop around waiting to see if we can make our
connection.
Being a DoS, it has security implications, giving it a short MFC
time.
MFC after: 1 day
in question is PPP-only line, i.e. no PPP-sequence detection is necessary and
PPP login program referenced by `pp' should be started automatically instead of
login(1)
Feature suggested and sponsored by: United Networks of Ukraine
No reply from: re
MFC after: 2 weeks
in the output to the "STAT file" request.
This closes one discrepancy with RFC 959 (page 36.)
See also http://www.kb.cert.org/vuls/id/328867
Obtained from: OpenBSD
to Solaris, it is in /usr/libexec) to perform the handing over of tty nodes
to the user being granted the pty.
Submitted by: Ryan Younce <ryany@pobox.com>
Reviewed by: security-officer@, standards@, mike@
skipping read-only pages, which can result in valuable non-text-related
data not getting dumped, the ELF loader and the dynamic loader now mark
read-only text pages NOCORE and the coredump code only checks (primarily) for
complete inaccessibility of the page or NOCORE being set.
Certain applications which map large amounts of read-only data will
produce much larger cores. A new sysctl has been added,
debug.elf_legacy_coredump, which will revert to the old behavior.
This commit represents collaborative work by all parties involved.
The PR contains a program demonstrating the problem.
PR: kern/45994
Submitted by: "Peter Edwards" <pmedwards@eircom.net>, Archie Cobbs <archie@dellroad.org>
Reviewed by: jdp, dillon
MFC after: 7 days
Properly sort options, spell "file system" correctly, expand contraction.
Catch up to the src/etc/syslog.conf,v 1.23 change: ftpd(8) session logs
are now by default get logged to /var/log/xferlog.
Approved by: re
memory area would arise. Only an addrinfo list from an earlier
call to getaddrinfo() should be freed there because it will be
substituted by the current list referenced by "res".
Reported by: John Long <fbsd1@pruam.com>
MFC after: 5 days
MAC labels are set if MAC is enabled and configured for the user
logging in.
Note that lukemftpd is not considered a supported application when
MAC is enabled, as it does not use the standard system interfaces for
managing user contexts; if lukemftpd is used with labeled MAC policies,
it will not properly give up privileges when switching to the user
account.
Approved by: re
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
than the LOMAC-specific interfaces for listing MAC labels. This permits
ls to view MAC labels in a manner similar to getfmac, when ls is used
with the -l argument. Next generation LOMAC will use the MAC Framework
so should "just" work with this and other policies. Not the prettiest
code in the world, but then, neither is ls(1).
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
before referencing object's DAG. This makes it possible for
C++ exceptions to work across shared libraries and brings
us closer to the search order used by Solaris/Linux.
Reviewed by: jdp
Approved by: obrien
MFC after: 1 month
even if there was no error occured (when trying to dlopen(3) object that
already linked into executable which does dlopen(3) call). This is more
proper fix for `ldd /usr/lib/libc.so' problem, because the new behaviour
conforms to documentation.
Remove workaround from ldd.c (rev.1.32).
PR: 35099
Submitted by: Nathan Hawkins <utsl@quic.net>
MFC after: 1 week
under way to move the remnants of the a.out toolchain to ports. As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL. It has already lasted WAY beyond
that.
Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.
Tested on: i386 (extensively), alpha
o Don't free(3) memory occupied by host structures
already in the host list.
o Set hrp->hostinfo to NULL if a host record has to stay in
the host list, but is to be ignored. Selecthost() knows that.
o Reduce the pollution with excessive NULL checks.
o Close a couple of memory leaks.
MFC after: 1 week
for the DT_IA64_PLT_RESERVE dynamic table entry. When a shared object
does not have any PLT relocations, the linker apparently doesn't find
it necessary to actually reserve the space for the BOR (Bind On
Reference) entries as pointed to by the DTE. As a result, relocatable
data in the PLT was overwritten, causing some unexpected control flow
with annoyingly predictable outcome: coredump.
To reproduce:
% echo 'int main() { return 0; }' > foo.c
% cc -o foo foo.c -lxpg4
o check getaddrinfo(3) return value, not result pointer
o getaddrinfo(3) returns int, not pointer
o don't leak memory allocated for hostnames and hostinfo structures
o initialize pointers that will be checked for NULL somewhere
MFC after: 1 week
(I skipped those in contrib/, gnu/ and crypto/)
While I was at it, fixed a lot more found by ispell that I
could identify with certainty to be errors. All of these
were in comments or text, not in actual code.
Suggested by: bde
MFC after: 3 days
o Remove the race between stat(2) & fopen(3) when creating
a unique file.
o Improve bound checking when generating a unique name from
a given pathname.
o Ignore REST marker on APPE. No RFC specifies this case,
but the idea of resuming APPE's implies this.
o By default, deny upload resumes and appends by anonymous users.
Previously these commands were translated to STOU silently,
which led to broken files on server without any notification
to the user.
o Add an option, -m, to allow anonymous users to modify
existing files (e.g., to resume uploads) if filesystem
permissions permit.
Portions obrainded from: OpenBSD
MFC after: 3 weeks
objects' reference counts. This function is called by the atexit
mechanism at program shutdown. I don't think the locking is necessary
here. It caused OpenOffice builds to hang more often than not.
Credit to Martin Blapp and Matt Dillon for helping to diagnose this
problem and for testing the fix.
Earlier, a decimal number (e.g., 890) could be passed
for mode, leading to dangerous permissions set:
-1, that is, 07777.
Obtained from: OpenBSD
MFC after: 1 week
socket option to avoid exausting the passive port
space by TIME_WAIT'ing connections.
PR: bin/36955
Submitted by: Maxim Konovalov <maxim@FreeBSD.org>
MFC after: 2 weeks
write(2), and getipnodebyaddr(3) calls. Now all the above functions
accept "void *" in that arguments and have prototypes. Thus, the
casts are useless under the normal circumstances (and would be harmful
if the functions had no prototypes.)
MFC after: 2 weeks
o Always check a setsockopt(2) return value
o Use a consistent message format
o Don't abort if the failed setsockopt(2) was actually not vital
o Use LOG_WARNING, not LOG_ERR, in non-fatal cases
MFC after: 1 week
o "struct addrinfo" contains a pointer to "struct sockaddr,"
not "struct sockaddr" itself
o the function takes a pointer to "struct in*_addr", not to
"struct sockaddr," so the address length must be corresponding
MFC after: 1 week
Thus lines of any length can be handled, unlike before.
Don't assume that each line read from the files ends with a newline.
As a side effect in inithosts(), don't use automatic buffer at all,
utilize malloc(3) when getting local host name instead.
PR: misc/21494
Reviewed by: maxim, mikeh
MFC after: 1 month
comsat:
only send two bell charecters if S_IXGRP is set and S_IXUSR is not.
biff:
add new option 'b' to set S_IXGRP.
PR: 10931
Submitted by: Andrew J. Korty <ajk@purdue.edu>
Approved by: sheldonh (mentor)
MFC after: 1 month
They provided little benefit (if any) and they caused some problems
in OpenOffice, at least in post-KSE -current and perhaps in other
environments too. The nanosleep calls prevented the profiling timer
from advancing during the spinloops, thereby preventing the thread
scheduler from ever pre-empting the spinning thread. Alexander
Kabaev diagnosed this problem, Martin Blapp helped with testing,
and Matt Dillon provided some helpful suggestions.
This is a short-term fix for a larger problem. The use of spinlocking
isn't guaranteed to work in all cases. For example, if the spinning
thread has higher priority than all other threads, it may never be
pre-empted, and the thread holding the lock may never progress far
enough to release the lock. On the other hand, spinlocking is the
only locking that can work with an arbitrary unknown threads package.
I have some ideas for a much better fix in the longer term. It
would eliminate all locking inside the dynamic linker by making it
safe for symbol lookups and lazy binding to proceed in parallel
with a call to dlopen or dlclose. This means that the only mutual
exclusion needed would be to prevent multiple simultaneous calls
to dlopen and/or dlclose. That mutual exclusion could be put into
the native pthreads library. Applications using foreign threads
packages would have to make their own arrangements to ensure that
they did not have multiple threads in dlopen and/or dlclose -- a
reasonable requirement in my opinion.
MFC after: 3 days
of the remote host (or rather, the name as mangled by realhostname_sa())
so that the process can use it to behave differently depending on the
origin on the request. We use this to implement rudimentary visibility
control on our user information.
Make sure that the child process's standard error goes through the same
NVT-ASCII filter as is applied to the standard output.
Don't attempt to call logerr() from the child since stdio is not safe in
a vforked process. Just write a message to fd 2 instead. (Ideally, the
parent would open two pipes, and siphon off our stderr to some place less
public, but I have not attempted to do so in this implementation.)
matching constraints where appropriate. This makes the dynamic
linker buildable at -O0 again.
Thanks to Bruce Evans for identifying the cause of the build
problem.
MFC after: 1 week
Untested (testing request went unanswered), but sparc64 is not expected to
cause problems. IA64 is not expected to cause problems but the patch was
slightly more complex so the possibility exists.
Approved by: jdp
goto target was so the cache could be freed. So free the cache after
done: rather then before done: (!)
Submitted by: Gavin Atkinson <gavin@ury.york.ac.uk>
Martin Blapp determined that the elf dynamic loader was at fault. In
particular, the loader uses alloca() to allocate a symbol cache on the
stack. Normally this would work just fine, but if the loader is called
from a threaded program and the object being loaded is fairly large the
alloca() can blow away the thread stack and effect other nearby thread
stacks as well. My testing showed that the symbol cache can be as large
as 250KBytes during the openoffice port build and install sequence. Martin
was able to work around the problem by disabling the symbol cache
(cache = NULL;). However, this solution is not adequate for commit because
it can cause an enormous cpu burden for applications which do a lot of
dynamic loading (e.g. like konqueror).
The solution is to use anonymous mmap() to temporarily allocate space to
hold the symbol cache. In testing I found that replacing the alloca()
with mmap() has no observable degredation in performance.
It should be noted that this bug does not necessarily cause an immediate
crash but can instead result in long term corruption and instability in
applications that load modules from threads. The bug is almost certainly
responsible for some of the instabilities found in konqueror, for example,
and possibly netscape too.
Sleuthing work by: Martin Blapp <mb@imp.ch>
X-MFC after: Before or after the 4.6 release depending on the release engineers
can then end up not properly clearing wtmp/utmp entries.
PR: bin/37934
Submitted by: Sandeep Kumar <skumar@juniper.net>
Reviewed by: markm
MFC after: 2 weeks
o Set st_shndx for sym_zero to SHN_UNDEF instead of SHN_ABS.
This gives us something to reliably test against.
o For weak references to undefined sysmbols (as indicated by
having st_shndx equals SHN_UNDEF) in the context of OPDs,
the address of the OPD is to be zero, not the address of
the function it contains.
o For weak references to undefined symbols in all other cases
(only DIR64LSB at this time), the actual relocated value is
to be zero, not the value prior to relocating.
Roughly speaking, weak references to undefined symbols are no-ops.
Tested on: i386, ia64
relocation identifies the symbol to which we need to bind. This
solves a problem seen on ia64 where the symbol hash table does not
contain local symbols and thus resulted in unresolved symbols.
Tested on: alpha, i386, ia64
with a back off. This was discovered when Luigi sent me code to
handle this for Etherboot. The Etherboot patch worked okay but
FreeBSD's tftpd had trouble handling it and would fail to transfer
the file since it would abort on send and not retry.
Submitted by: luigi
MFC after: 1 week
objects were not being correctly set to zero. Instead, the function
descriptor pointer was set to the load address of the .so object. This
caused gcc generated binaries to segfault on exit when crtbegin.asm's
_fini code tested the __cxa_finalize() function pointer for zero.
This is a bit of a hack because of a problem nearby workaround for
find_symdef and its quirks (failures) for local symbols. This still
needs to be fixed.
returns off_t in yylval.u.o. REST is the only user of yylval.u.o at the
moment.
NB: seems lukemftpd has the same bug.
PR: misc/28629
Reviewed by: ru
Approved by: ru
MFC after: 1 month
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
complexities associated with having MD (asm and inline) versions, and
having to prevent exposure of these functions in other headers that
happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.
Tested on: alpha, i386
Reviewed by: bde, jake, tmm
produced by ld(8) (ie: that _DYNAMIC immediately follows the _GOT).
The new binutils import changed that, and the intial GOT relocation
broke. Use a custom linker script to provide a real end-of-GOT symbol.
Update ld.so to deal with the new (faster) PLT format that gcc-3.1 and
binutils can produce.
This is probably incomplete, but appears to be working again.
Obtained from: NetBSD
(And a fix to a silly mistake that I made by: gallatin)
o Use new-style prototypes and function definitions.
o Fix timeout and justquit to have proper signatures for signal
handlers. Mark the args as __unused.
o remove register
o Use new-style prototypes exclusively rather than the old foo() style.
o Use new-style function definitions.
o remove register
o make functions passed to signal have the right signature.
o do minor const poisoning.
signal handlers. In this case, use _exit(2) instead, following
the call to shutdown(2).
This fixes rare telnetd hangs.
PR: misc/33672
Submitted by: Umesh Krishnaswamy <umesh@juniper.net>
MFC after: 1 month
handlers to set flags only (with exception for sigquit(),
which still seems to call some non-reentrant functions on
its way to _exit(2).) That must eliminate the possibility
of catching SIGSEGV from following non-reentrant paths from
signal handlers.
PR: bin/32740 bin/33846
Submitted by: Maxim Konovalov <maxim@macomnet.ru>
Obtained from: OpenBSD
and sbrk's prototype from char *sbrk(int) to void *sbrk(intptr_t).
This makes us more consistant with NetBSD and standards which include
these functions. Bruce pointed out that ptrdiff_t would probably
have been better than intptr_t, but this doesn't match other
implimentations.
Also remove local declarations of sbrk and unnecessary casting.
PR: 32296
Tested by: Harti Brandt <brandt@fokus.gmd.de>
MFC after: 1 month
is implemented in pam_opie module
For non-PAM variant rewrite empty password checking code to do the right thing
and not disallow empty passwords in all cases.
Hiroyuki YAMAMORI gave a patch for the EPRT command in the
PR below. Problems with the rest of the patch are my fault.
PR: 33268
Reviewed by: iedowse, sheldonh
handed a integer, not void).
- No need to set flags to zero when they already will be.
- It was also noted the manner in which the signal handling has changed
might possibly generate some problems (hangs possibly) -- these, while
remaining in the code, will be fixed shortly (within a day).
Submitted by: bde
negotiation rather than rejecting the request.
Apple OpenFirmware 3.0f3 (the version in my iMac) adds trailing garbage to the
end of an otherwise valid request. Without this change, the requests were
rejected which prevented me from booting.
Reviewed by: obrien
DoS bug that the select(2)/accept(2) pair is called on
a socket that is in the blocking I/O mode. The bug is
triggered if a selected connection dies before the accept(2)
leading to the accept(2) blocking virtually forever.
MFC after: 1 week
