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2021-03-16On i386 don't attempt to map shared libraries in low memory whenKurt Miller
a large executable's .text section crosses the 512MB exec line. Executables that have MAXTSIZ > 64MB can map above the default 512MB exec line. When this happens, shared libs that attempt to map into low memory will find their .data section can not be mapped. ld.so will attempt to remap the share lib at higher addresses until it can be mapped. For very large executables like chrome this process is very time consuming. This change detects how much of the executable's .text section exceeds 512MB and uses that as the initial hint for shared libs to map into which avoids attempting to map into blocked memory. okay deraadt@
2021-01-02Check auth_mkvalue(3) return value for NULL (malloc failure).Todd C. Miller
For constant strings we don't actually need to use auth_mkvalue(3). Problem reported by Ross L Richardson.
2020-12-27We know about optreset from unistd.h.Florian Obser
From Jan Stary, thanks. OK martijn
2020-12-26Fix a nasty mem leak in ld.so's own malloc. This was hard to diagnose, sinceOtto Moerbeek
malloc dumping and gdb do not help at all when studying ld.so. In the end it turns out ot be a simple merge error causing extra mmap calls. ok miller@ tb@
2020-11-28Add retguard to macppc kernel locore.S, ofwreal.S, setjmp.Sgkoehler
This changes RETGUARD_SETUP(ffs) to RETGUARD_SETUP(ffs, %r11, %r12) and RETGUARD_CHECK(ffs) to RETGUARD_CHECK(ffs, %r11, %r12) to show that r11 and r12 are in use between setup and check, and to pick registers other than r11 and r12 in some kernel functions. ok mortimer@ deraadt@
2020-10-26Retguard asm macros for powerpc libc, ld.sogkoehler
Add retguard to some, but not all, asm functions in libc. Edit SYS.h in libc to remove the PREFIX macros and add SYSENTRY (more like aarch64 and powerpc64), so we can insert RETGUARD_SETUP after SYSENTRY. Some .S files in this commit don't get retguard, but do stop using the old prefix macros. Tested by deraadt@, who put this diff in a macppc snap.
2020-10-16Use the retguard macros from asm.h to protect the system call stubs.Theo de Raadt
ok mortimer kettenis
2020-10-15make three mib[] arrays const, as was done in libcTheo de Raadt
2020-10-11Don't skip file systems just because the parent fs is nodev and nosuid.Todd C. Miller
Fixes instances where a mount point uses the nodev and nosuid options but another file system mounted inside that hierarchy does not. OK schwarze@
2020-09-17afs, nnpfs, and procfs are no longer supported,Ingo Schwarze
so stop looking for them in mount(8) output; no functional change intended; OK millert@
2020-09-14Do not bother scanning file systems that are both nodev and nosuidIngo Schwarze
for SUID, SGID, and device files, implementing an idea that deraadt@ came up with based on a somewhat similar idea from millert@ after a loosely related comment from Rupert Gallagher on misc@. While here, minimally simplify the way mount options are parsed, hoping to make the parsing more readable and also more robust. OK millert@ deraadt@
2020-09-14No need to check for NULL before calling free.Martijn van Duren
from miod@
2020-09-12Documentation fixes by jmc.Martijn van Duren
2020-09-12Import login_ldap.Martijn van Duren
The code is based login_ldap port, but uses our own aldap implementation instead of openldap. It also uses a stand alone configuration file instead of login.conf, since setting this up might contain information not destined for everyone to see. OK bluhm@ "Go for it" deraadt@
2020-09-06Move definiton of struct token_types *tt to init.c from header file.mortimer
Makes it build with -fno-common. ok deraadt
2020-08-11clang 10 now emits calls to __multi3 from libcompiler_rtJeremie Courreges-Anglas
Hints from kettenis@, ok kettenis@ deraadt@
2020-07-18Use the same names as the 64-bit PowerPC ELF ABI for the relocations.Mark Kettenis
2020-07-16Rewrite loop to match what is written down in the ABI document.Mark Kettenis
ok drahn@
2020-07-16Make lazy binding work.Mark Kettenis
Committing on behalf of drahn@ who is a bit busy.
2020-07-08Clarify man pagejob
OK sobrado@ jmc@
2020-06-28Disable powerpc64 lazy binding, code was not for 64 bit ABIDale Rahn
DT_PPC_GOT is not used on powerpc64, delete.
2020-06-28Powerpc64 ld.so asm code needs to conform to Powerpc64 abi, not 32bit.Dale Rahn
ok kettenis@
2020-06-25PowerPC64 ld.so code.Dale Rahn
Mostly ported, code runs far enough to start first symbol string lookup. build with -gdwarf-4 to remove asm warnings. Do not bother supporting 32 bit non-pic relocations in shared libraries. (however leave the code there for now)
2020-05-27Remove support for world-writable mail spools.Todd C. Miller
They won't work any more due to pledge restrictions so just print an error and exit if the spool is world-writable. OK beck@
2020-05-15Fix handling of passwd entries with an empty password.Todd C. Miller
Initialize "pass" to the empty string instead of NULL, otherwise crypt_checkpass() will dereference NULL. From Yuichiro Naito via yasuoka@. OK deraadt@
2020-05-08ld.so(1) also ignores LD_LIBRARY_PATH an friends for set-group-ID executablesJeremie Courreges-Anglas
While here, use consistent casing and don't use .Ev for set-user-ID/set-group-ID. from Miod
2020-05-08LD_DEBUG is ignored for set-user-ID and set-group-ID executablesJeremie Courreges-Anglas
from Miod
2020-03-27Add missing space in stack smash handler error message.Matthieu Herrb
ok kettenis@, deraadt@
2020-03-13Anthony Steinhauser reports that 32-bit arm cpus have the same speculationTheo de Raadt
problems as 64-bit models. To resolve the syscall speculation, as a first step "nop; nop" was added after all occurances of the syscall ("swi 0") instruction. Then the kernel was changed to jump over the 2 extra instructions. In this final step, those pair of nops are converted into the speculation-blocking sequence ("dsb nsh; isb"). Don't try to build through these multiple steps, use a snapshot instead. Packages matching the new ABI will be out in a while... ok kettenis
2020-03-13Anthony Steinhauser reports that 32-bit arm cpus have the same speculationTheo de Raadt
problems as 64-bit models. For the syscall instruction issue, add nop;nop after swi 0, in preparation for jumping over a speculation barrier here later. (a lonely swi 0 was hiding in __asm in this file)
2020-03-11Anthony Steinhauser reports that 32-bit arm cpus have the same speculationTheo de Raadt
problems as 64-bit models. For the syscall instruction issue, add nop;nop after swi 0, in preparation for jumping over a speculation barrier here later. ok kettenis
2020-03-04Avoid passing a NULL name to retrieve(), use "." instead.Todd C. Miller
Fixes a "vfprintf %s NULL" warning in ftpd. OK deraadt@ tb@
2020-02-18Now that the kernel skips the two instructions immediately followingMark Kettenis
a syscall, replace the double nop with a dsb nsh; isb; sequence which stops the CPU from speculating any further. This fix was suggested by Anthony Steinhauser. ok deraadt@
2020-02-09Use sysexits.h exit values to distinguish between tempfail and permfail.Todd C. Miller
Unix MTAs use the exit value of the MDA (here mail.local) to determine whether or not a failure to deliver mail should be considered to be a temporary or permanent failure. OK semarie@ beck@
2020-02-08correct Research Unix edition "appeared in" use in HISTORYJonathan Gray
Starting from "Combined Table of Contents" in Doug McIlroy's "A Research UNIX Reader" a table of which edition manuals appeared in. Checked against manuals from bitsavers/TUHS and source from TUHS where available. Ingo points out there are cases where something is included but not documented until a later release. bcd(6) v6 v7 printf(3) v2 v4 abort(3) v5 v6 system(3) v6 v7 fmod(3) v5 v6 ok schwarze@
2020-02-07Remove backward compatibility for obsolete -H flag.Todd C. Miller
The -H flag was deprecated in 1998. OK jung@
2020-02-02Allow mail.local to be run as non-root.Todd C. Miller
If mail.local is invoked by a non-root user, open a pipe to lockspool(1) for file locking. It is only possible to delivery to a pre-existing mail spool when running mail.local as non-root. OK gilles@ deraadt@
2020-01-26Insert two nop instructions after each svc #0 instruction in userland.Mark Kettenis
The will be replaced by a speculation barrier as soon as we teach the kernel to skip over these two instructions when returning from a system call. ok patrick@, deraadt@
2020-01-15Simplify globbing of ftpd(8)s list and nlst commands.jan
Also avoid command option injection for ls(1). OK martijn@
2019-12-24Merge two missed fixes from login.c to login_passwd.c.Todd C. Miller
- use the correct length when checking for "-v lastchance=yes" - don't try to zero pass if it is NULL From miod@
2019-12-21Replace modular version with origin BSDi version with our updates.Todd C. Miller
In 2001 login_passwd was made modular so we could use the same source for passwd and kerberos auth. Now that we no longer have kerberos integrated we can simplify login_passwd. OK deraadt@
2019-12-17Eliminate failure returns from _dl_split_path(): if malloc fails just _dl_oom()Philip Guenther
Prompted by Qualys's leveraging malloc failure in _dl_split_path() to get stuff past. ok deraadt@ millert@
2019-12-17Don't look up env variables until we know we'll trust them. Otherwise,Philip Guenther
just delete them without looking. ok millert@
2019-12-14Return BI_SILENT not BI_AUTH if the challenge service is requested.Todd C. Miller
This bug was introduced in the login_passwd rewrite back in 2001. From Tom Longshine.
2019-12-11ld.so may fail to remove the LD_LIBRARY_PATH environment variable forTodd C. Miller
set-user-ID and set-group-ID executables in low memory conditions. Reported by Qualys
2019-12-09When loading a library, mmap(2) may fail. Then everything getsAlexander Bluhm
unmapped and ld.so tries again with different random address layout. In this case, use the new libc executable address for msyscall(2), not one from the first try. Fixes sporadic bogus syscall on i386. OK deraadt@
2019-12-09print addresses upon msyscall failure, for nowTheo de Raadt
2019-12-07Disable ltrace for objects linked with -znow, as at least on amd64, linkingPhilip Guenther
that was deletes the lazy relocation trampoline which ltrace currently depends on problem reported by tb@ directional feedback kettenis@ ok mpi@
2019-12-02It is not always clear what ld.so was backed up to ld.so.backup, andTheo de Raadt
better that folk doing development in here use their own cp tooling.
2019-11-30Sigh, fix i386 msyscall() case to permission the correct address range.Theo de Raadt
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