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2016-10-05TagFile: Fix off-by-one errors in comment strippingJulian Andres Klode
Adding 1 to the value of d->End - current makes restLength one byte too long: If we pass memchr(current, ..., restLength) has thus undefined behavior. Also, reading the value of current has undefined behavior if current >= d->End, not only for current > d->End: Consider a string of length 1, that is d->End = d->Current + 1. We can only read at d->Current + 0, but d->Current + 1 is beyond the end of the string. This probably caused several inexplicable build failures on hurd-i386 in the past, and just now caused a build failure on Ubuntu's amd64 builder. Reported-By: valgrind (cherry picked from commit 923c592ceb6014b31ec751b97b3ed659fa3e88ae)
2016-10-05Fix segfault and out-of-bounds read in Binary fieldsJulian Andres Klode
If a Binary field contains one or more spaces before a comma, the code produced a segmentation fault, as it accidentally set a pointer to 0 instead of the value of the pointer. If the comma is at the beginning of the field, the code would create a binStartNext that points one element before the start of the string, which is undefined behavior. We also need to check that we do not exit the string during the replacement of spaces before commas: A string of the form " ," would normally exit the boundary of the Buffer: binStartNext = offset 1 ',' binEnd = offset 0 ' ' isspace_ascii(*binEnd) = true => --binEnd => binEnd = - 1 We get rid of the problem by only allowing spaces to be eliminated if they are not the first character of the buffer: binStartNext = offset 1 ',' binEnd = offset 0 ' ' binEnd > buffer = false, isspace_ascii(*binEnd) = true => exit loop => binEnd remains 0 (cherry picked from commit ce6cd75dc367b92f65e4fb539dd166d0f3361f8c)
2016-10-05don't loop on pinning pkgs from absolute debs by regexDavid Kalnischkies
An absolute filename for a *.deb file starts with a /. A package with the name of the file is inserted in the cache which is provided by the "real" package for internal reasons. The pinning code detects a regex based wildcard by having the regex start with /. That is no problem as a / can not be included in a package name… expect that our virtual filename package can and does. We fix this two ways actually: First, a regex is only being considered a regex if it also ends with / (we don't support flags). That stops our problem with the virtual filename packages already, but to be sure we also do not enter the loop if matcher and package name are equal. It has to be noted that the creation of pins for virtual packages like the here effected filename packages is pointless as only versions can be pinned, but checking that a package is really purely virtual is too costly compared to just creating an unused pin. Closes: 835818 (cherry picked from commit e950b7e2f89b5e48192cd469c963a44fff9f1450)
2016-10-05changelog: Respect Dir setting for local changelog gettingJulian Andres Klode
This fixes issues with chroots, but the goal here was to get the test suite working on systems without dpkg. (cherry picked from commit 2ed62ba6abcad809d1898a40950f86217af73812)
2016-10-05install-progress: Call the real ::fork() in our fork() methodJulian Andres Klode
We basically called ourselves before, creating an endless loop. Reported-By: clang (cherry picked from commit d651c4cd71a43c385c3d3bcd3a9f25bf0a67f8f2)
2016-10-05Ignore SIGINT and SIGQUIT for Pre-Install hooksJulian Andres Klode
Instead of erroring out when receiving a SIGINT, let the child deal with it - we'll error out anyway if the child exits with an error or due to the signal. Also ignore SIGQUIT, as system() ignores it. This basically fixes Bug #832593, but: we are running the hooks via sh -c. Some shells exit with a signal error even if the command they are executing catches the signal and exits successfully. So far, this has been noticed on dash, which unfortunately, is our default shell. Example: $ cat trap.sh trap 'echo int' INT; sleep 10; exit 0 $ if dash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint FAIL: 130 $ if mksh -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint OK: 0 $ if bash -c ./trap.sh; then echo OK: $?; else echo FAIL: $?; fi ^Cint OK: 0 (cherry picked from commit a6ae3d3df490e7a5a1c8324ba9dc2e63972b1529)
2016-10-05set the correct item FileSize in by-hash caseDavid Kalnischkies
In af81ab9030229b4ce6cbe28f0f0831d4896fda01 we implement by-hash as a special compression type, which breaks this filesize setting as the code is looking for a foobar.by-hash file then. Dealing this slightly gets us the intended value. Note that this has no direct effect as this value will be set in other ways, too, and could only effect progress reporting. Gbp-Dch: Ignore (cherry picked from commit 3084ef2292642d43e533654354a4929abe55d91b)
2016-10-05drop incorrect const attribute from DirectoryExistsDavid Kalnischkies
Since its existence in 2010 DirectoryExists was always marked with this attribute, but for no real reason. Arguably a check for the existence of the file is not modifying global state, so theoretically this shouldn't be a problem. It is wrong from a logical point of view through as between two calls the directory could be created so the promise we made to the compiler that it could remove the second call would be wrong, so API wise it is wrong. It's a bit mysterious that this is only observeable on ppc64el and can be fixed by reordering code ever so slightly, but in the end its more our fault for adding this attribute than the compilers fault for doing something silly based on the attribute. LP: 1473674 (cherry picked from commit 9445fa62386c80c9822e77484d30b2109aa0f2dc)
2016-10-05fileutl: empty file support: Avoid fstat() on -1 fd and check resultJulian Andres Klode
When checking if a file is empty, we forget to check that fstat() actually worked. (cherry picked from commit 15fe8e62d37bc87114c59d385bed7ceefb72886b)
2016-10-05allow user@host (aka: no password) in URI parsingDavid Kalnischkies
If the URI had no password the username was ignored (cherry picked from commit a1f3ac8aba0675321dd46d074af8abcbb10c19fd)
2016-10-05pass --force-remove-essential to dpkg only if neededDavid Kalnischkies
APT (usually) knows which package is essential or not, so we can avoid passing this force flag to dpkg unconditionally if the user hasn't chosen a non-default essential handling obscuring the information. (cherry picked from commit d3930f8716f439c229cd3d11813823d847a2ecff)
2016-10-05gpgv: Unlink the correct temp file in error caseJulian Andres Klode
Previously, when data could be created and sig not, we would unlink sig, not data (and vice versa). (cherry picked from commit d0d06f44ed60a3888528d834a799bae86c2978d5)
2016-10-05if the FileFd failed already following calls should fail, tooDavid Kalnischkies
There is no point in trying to perform Write/Read on a FileFd which already failed as they aren't going to work as expected, so we should make sure that they fail early on and hard. (cherry picked from commit 02c38073af51802c02bb104d4450e0e112d641ad)
2016-10-05(error) va_list 'args' was opened but not closed by va_end()David Kalnischkies
Reported-By: cppcheck Gbp-Dch: Ignore (cherry picked from commit 196d590a99e309764e07c9dc23ea98897eebf53a)
2016-08-31rred: truncate result file before writing to itDavid Kalnischkies
If another file in the transaction fails and hence dooms the transaction we can end in a situation in which a -patched file (= rred writes the result of the patching to it) remains in the partial/ directory. The next apt call will perform the rred patching again and write its result again to the -patched file, but instead of starting with an empty file as intended it will override the content previously in the file which has the same result if the new content happens to be longer than the old content, but if it isn't parts of the old content remain in the file which will pass verification as the new content written to it matches the hashes and if the entire transaction passes the file will be moved the lists/ directory where it might or might not trigger errors depending on if the old content which remained forms a valid file together with the new content. This has no real security implications as no untrusted data is involved: The old content consists of a base file which passed verification and a bunch of patches which all passed multiple verifications as well, so the old content isn't controllable by an attacker and the new one isn't either (as the new content alone passes verification). So the best an attacker can do is letting the user run into the same issue as in the report. Closes: #831762 (cherry picked from commit 0e071dfe205ad21d8b929b4bb8164b008dc7c474)
2016-08-31verify hash of input file in rredDavid Kalnischkies
We read the entire input file we want to patch anyhow, so we can also calculate the hash for that file and compare it with what he had expected it to be. Note that this isn't really a security improvement as a) the file we patch is trusted & b) if the input is incorrect, the result will hardly be matching, so this is just for failing slightly earlier with a more relevant error message (althrough, in terms of rred its ignored and complete download attempt instead). (cherry picked from commit 6e71ec6fcdcaa926c98fa58cd4af38e42556df15)
2016-08-31call flush on the wrapped writebuffered FileFdDavid Kalnischkies
The flush call is a no-op in most FileFd implementations so this isn't as critical as it might sound as the only non-trivial implementation is in the buffered writer, which tends not be used to buffer another buffer… (cherry picked from commit 8ca481e8419c19b6ef9074b68cc028177a507161)
2016-08-31report all instead of first error up the acquire chainDavid Kalnischkies
If we don't give a specific error to report up it is likely that all error currently in the error stack are equally important, so reporting just one could turn out to be confusing e.g. if name resolution failed in a SRV record list. (cherry picked from commit b50dfa6b2dd2d459e0c2746ac9367982b96ffac0)
2016-08-31don't change owner/perms/times through file:// symlinksDavid Kalnischkies
If we have files in partial/ from a previous invocation or similar such those could be symlinks created by file:// sources. The code is expecting only real files through and happily changes owner, modification times and permission on the file the symlink points to which tend to be files we have no business in touching in this way. Permissions of symlinks shouldn't be changed, changing owner is usually pointless to, but just to be sure we pick the easy way out and use lchown, check for symlinks before chmod/utimes. Reported-By: Mattia Rizzolo on IRC (cherry picked from commit 3465138575e1fd0d5892d9b6be1ae232eb873460)
2016-08-31do not treat same-version local debs as downgradeDavid Kalnischkies
As the volatile sources are parsed last they were sorted behind the dpkg/status file and hence are treated as a downgrade, which isn't really what you want to happen as from a user POV its an upgrade. (cherry picked from commit cb9ac09bd6a36e73c2dce1d529acde6e4d15e32d)
2016-08-31reinstalling local deb file is no downgradeDavid Kalnischkies
If we have a (e.g. locally built) deb file installed and do try to install it again apt complained about this being a downgrade, but it wasn't as it is the very same version… it was just confused into not merging the versions together which looks like a downgrade then. The same size assumption is usually good, but given that volatile files are parsed last (even after the status file) the base assumption no longer holds, but is easy to adept without actually changing anything in practice. (cherry picked from commit e7edb2fef8370d54a4b8e5a01266e6eda81ef84e)
2016-08-31protect only the latest same-source providers from autoremoveDavid Kalnischkies
Traditionally all providers are protected providing something as apt can't know which of them is actually really providing the functionality for the user ensuring that we don't propose the removal of used stuff, but that is of course also keeping stuff around which could be removed. That can cause the collection of multiple old providers until the provided package is itself no longer needed (e.g. out-of-tree kernel modules). We combat this by marking providers only from the newest source package version so that old providers built by older versions of the same source package can be garbage collected. (cherry picked from commit a0ed43f7323b9d7976ed0ba8d437a42e24af9eaf)
2016-08-31more explicit MarkRequired algorithm code (part 2)David Kalnischkies
As the previous commit, this shouldn't change behavior at all, but beside being more explicit and perhaps faster its also considerably shorter (granted, mostly by if0-block elimination). Gbp-Dch: Ignore (cherry picked from commit 5a3339db48479114a0e1e11ebc8d640eb3e49933)
2016-08-31more explicit MarkRequired algorithm codeDavid Kalnischkies
Piling everything in a single if statement always made my head wobble, but it hasn't even a benefit as the most common case of a package which isn't installed passes all of the old if and lands in the non-existent else-part of the inner if. So beside a subjective cleanup of what goes on this implementation should also be a bit faster. No change in behavior should be present. Gbp-Dch: Ignore (cherry picked from commit 769e9f3ea1cbe67d3b98e6db6c956abde2384868)
2016-08-31factor out Pkg/DepIterator prettyprinters into own headerDavid Kalnischkies
The old prettyprinters have only access to the struct they pretty print, which isn't enough usually as we want to know for a package also a bit of state information like which version is the candidate. We therefore need to pull the DepCache into context and hence use a temporary struct which is printed instead of the iterator itself. (cherry picked from commit 84573326f41dd09b914b8374548e7ee7c93d0439)
2016-08-31write auto-bits before calling dpkg & again after if neededDavid Kalnischkies
Writing first means that even in the event of a power-failure the autobit is saved for future processing instead of "forgotten" so that the package is treated as manually installed. In some cases we have to re-run the writing after dpkg is done through as dpkg can let packages disappear and in such cases apt will move autobits around (or in that case non-autobits) which we need to store. (cherry picked from commit 309f497b7280a45e3626493318adb6d39ba5c69b)
2016-08-31if reading of autobit state failed, let write failDavid Kalnischkies
If we can't read the old file we can't just move forward as that would discard potentially discard old data (especially other fields). We let it fail only after we are done writing the new file so a user has the chance to look into and merge the new data (which is otherwise discarded). (cherry picked from commit 520931867ee2fac8415a624204414d3b62550996)
2016-08-31don't do atomic overrides with failed filesDavid Kalnischkies
We deploy atomic renames for some files, but these renames also happen if something about the file failed which isn't really the point of the exercise… Closes: 828908 (cherry picked from commit fc5db01bb7d1546944200d197866b0b5c378f100)
2016-08-31cache: Bump minor version to 6Julian Andres Klode
Needed for the previous change (cherry picked from commit 33aa2752e7c7a6f0a01b191111aa35a5fe69cf20)
2016-08-31Fix buffer overflow in debListParser::VersionHash()Julian Andres Klode
If a package file is formatted in a way that that no space follows a deprecated "<", we would reformat it to "<=" and increase the length of the output by 1, which can break. Under normal circumstances with "<=" this should not be an issue. Closes: #828812 (cherry picked from commit b6e9756ca03ec887ef1d0bc8e38f63c29db7a365)
2016-06-22ensure filesize of deb is included in the hashes listDavid Kalnischkies
Filesize is a silly hash all by itself, but in combination with others it can be a strong opponent, so ensuring that it is in the list of hashes and hence checked by the normal course of action the acquire process takes is a good thing. (cherry picked from commit 5da51e0e2da3f055306562d38103b06a23d81719)
2016-06-20do not error if auto-detect-proxy cmd has no outputDavid Kalnischkies
Regression introduced in 8f858d560e3b7b475c623c4e242d1edce246025a. Commands are probably better of always having output through as the fall through to the generic proxy settings is likely not intended. As documenting and implementing this more consistently is kind of a regression through, it is split off into the next commit. Closes: 827713 (cherry picked from commit cad1877559f3e1703c3fea4d081978e1b4bb4a0e)
2016-06-10don't leak FD in AutoProxyDetect command return parsingDavid Kalnischkies
Just closing the fd would be enough, but while we are at it we can also use the Popen interface to have an easier time with this. (cherry picked from commit 8f858d560e3b7b475c623c4e242d1edce246025a)
2016-06-10don't leak an FD in lz4 (de)compressionDavid Kalnischkies
Seen first in #826783, but as this buglog also shows leaked uncompressed files as well we don't close it just yet. (cherry picked from commit 6f35be91c9e86e463bca7df6eadf05412c7b732c)
2016-06-10do not hang on piped input in PipedFileFdPrivateDavid Kalnischkies
This effects only compressors configured on the fly (rather then the inbuilt ones as they use a library). (cherry picked from commit bdc42211700ef0f6f40e4ef3f362e52d684d70fb)
2016-06-01prevent C++ locale number formatting in text APIsDavid Kalnischkies
Setting the C++ locale via std::locale::global(std::locale("")); which would otherwise default to the default C locale (aka: unaffected by setlocale) effects the formatting of numeric types in IO streams, which for output for humans is perfectly sensible, but breaks our many text interfaces used and parsed by us and others without expecting the numbers to be formatted. Closes: #825396 (cherry picked from commit b58e2c7c56b1416a343e81f9f80cb1f02c128e25)
2016-05-20fail instead of segfault on unreadable config filesDavid Kalnischkies
The report mentions "apt list --upgradable", but there are others which have inconsistent behavior ranging from segfaulting to doing something with the partial (and hence incomplete) data. We had a recent report about sources.list (#818628), this one mentions prefences, the obvious next step is conf files… so the testcase is adapted to check for all three in file and directory versions and run a bunch of commands each time which should all have more or less the same behavior in such a case (aka error out). Closes: 824503 (cherry picked from commit fdf9eef4d96a18d0167708499c993e1174251e88)
2016-05-11respect user pinning in M-A:same version (un)screwingDavid Kalnischkies
Using Pkg.CandVersion() here is wrong as its implementation will return a candidate based just on the default policy settings ignoring user preferences and otherwise set candidates (aka: it sidesteps the pkgDepCache). This causes M-A:same libraries to be detected as screwed even through they aren't, so that they end up being kept back. Reported-By: Felipe Sateler on IRC
2016-05-10update: Run Post-Invoke-Success if not all sources failedJulian Andres Klode
Failures can happen and APT regardless will do a partial cache update anyway. Because APT ensures that the list directory is in a sane state, it makes sense to also call success hooks if success was only partial - otherwise it loses sync with APT. Most importantly, this causes the appstream cache to be empty, see launchpad bug #1562733. This is somewhat overly optimistic though: As soon as any repository has nonexisting optional files, the missing optional files are also treated as success, which means a single broken repository without an InRelease file still runs Success hooks, even though it really should not. (cherry picked from commit 35664152e47a1d4d712fd52e0f0a2dc8ed359d32)
2016-05-10don't sent uninstallable rc-only versions via EDSPDavid Kalnischkies
Versions which are only available in dpkg/status aren't installable and apt doesn't pick them as candidate for this reason – for the same reason such packages shouldn't be sent to an external solver via EDSP. The packages are pinned to -1, but if the solver has strict pinning disabled it could end up picking this version anyhow – which is a request apt can not satisfy. Reported-By: Maximiliano Curia <maxy@debian.org> on IRC (cherry picked from commit 33190fe3d3c200dcd417cd336f9db11f5f4408d5)
2016-05-10allow redirection for items without a space in the desc againDavid Kalnischkies
Broken in a4b8112b19763cbd2c12b81d55bc7d43a591d610. If an item has a description which includes no space and is redirected to another mirror the code which wants to rewrite the description expects a space in there, but can't find it and the unguarded substr command on the string will fail with an exception thrown… Guarding it properly and everything is fine. (cherry picked from commit 84ac6edfabe1c92d67e8d441e04216ad33c89165)
2016-05-10don't show NO_PUBKEY warning if repo is signed by another keyDavid Kalnischkies
Daniel Kahn Gillmor highlights in the bugreport that security isn't improving by having the user import additional keys – especially as importing keys securely is hard. The bugreport was initially about dropping the warning to a notice, but in given the previously mentioned observation and the fact that we weren't printing a warning (or a notice) for expired or revoked keys providing a signature we drop it completely as the code to display a message if this was the only key is in another path – and is considered critical. Closes: 618445 (Backported from commit fb7b11ebb852fa255053ecab605bc9cfe9de0603)
2016-05-10deb822: Restore support for <multivalue>-{Add,Remove}James McCoy
Redesign of multivalue options in 463c8d801595ce5ac94d7c032264820be7434232 caused the parser to look for <multivalue>{Add,Remove} (no hyphen) instead of the expected <multivalue>-{Add,Remove}. (cherry picked from commit f5585106d61b381c9dcf8f1dd48c742dc68f6c81)
2016-04-14ensure outdated files are dropped without lists-cleanupDavid Kalnischkies
Tested via (newly) empty index files, but effects also files dropped from the repository or an otherwise changed repository config.
2016-04-14silently skip acquire of empty index filesDavid Kalnischkies
There is just no point in taking the time to acquire empty files – especially as it will be tiny non-empty compressed files usually.
2016-04-14fix Alt-Filename handling of file methodDavid Kalnischkies
A silly of-by-one error in the stripping of the extension to check for the uncompressed filename broken in an attempt to support all compressions in commit a09f6eb8fc67cd2d836019f448f18580396185e5. Fixing this highlights also mistakes in the handling of the Alt-Filename in libapt which would cause apt to remove the file from the repository (if root has the needed rights – aka the disk isn't readonly or similar)
2016-04-13recheck Pre-Depends satisfaction in SmartConfigureDavid Kalnischkies
Regression introduced in commit 590f1923121815b36ef889033c1c416a23cbe9a2 (2011!) causing apt to not check if Pre-Depends are satisfied before calling --configure. This managed to hide so perfectly well for years as Pre-Depends aren't that common, apt prefers upgrading these packages first and checks for satisfaction is already in SmartUnpack, so there is only a small window of oppertunity to break a pre-dependency relation (usually with an unpack). Verified by logchecking with two provided status files in the buglog. I would have liked to write a test, but I wasn't able to reach the needed complexity to get apt to fail – but the change is small and reasonable, so what could possible go wrong™, right? LP: #1569099
2016-04-13detect compressed status files on extension againDavid Kalnischkies
It handy to be able to point apt at reading a compressed dpkg/status file in debugging cases, which worked pre-1.1 but somewhere down the line in the massive refactoring. Restoring this behavior in a central place for all realfile index files instead of just for the status file. (This has no effect on index files acquired from an archive – those are handled by different classes and support compressed files just fine)
2016-04-13do not require non-broken systems in 'upgrade'David Kalnischkies
There is a good chance that the attempt will fail, but if a user mentions certain packages explicitly on the commandline there is a chance that this will consist of a broken system which is resolved by upgrading more packages then just the mentioned. This limitation was not effecting external resolvers.
2016-04-07stop handling items in doomed transactionsDavid Kalnischkies
With the previous commit we track the state of transactions, so we can now use our knowledge to avoid processing data for a transaction which was already closed (via an abort in this case). This is needed as multiple independent processes are interacting in the process, so there isn't a simple immediate full-engine stop and it would also be bad to teach each and every item how to check if its manager has failed subordinate and what to do in that case. In the pdiff case, which deals (potentially) with many items during its lifetime e.g. a hashsum mismatch in another file can abort the transaction the file we try to patch via pdiff belongs to. This causes some of the items (which are already done) to be aborted with it, but items still in the process of acquisition continue in the processing and will later try to use all the items together failing in strange ways as cleanup already happened. The chosen solution is to dry up the communication channels instead by ignoring new requests for data acquisition, canceling requests which are not assigned to a queue and not calling Done/Failed on items anymore. This means that e.g. already started or pending (e.g. pipelined) downloads aren't stopped and continue as normal for now, but they remain in partial/ and aren't processed further so the next update command will pick them up and put them to good use while the current process fails updating (for this transaction group) in an orderly fashion. Closes: 817240 Thanks: Barr Detwix & Vincent Lefevre for log files