Nikita Popov [Mon, 12 Aug 2019 14:58:52 +0000 (16:58 +0200)]
Intern alias old_name early
This is likely going to end up interned lateron at some point
when the new_name is referenced somewhere. However, it may be
that there are some uses that do not get interned before that.
In this case we will intern a string that already have zval
users, without updating the refcounted flag on those zvals.
In particular this can happen with something like [Foo::class],
where Foo is an imported symbol. The string it resolves to won't
get interned right away, but may be interned later.
use Foo as Bar;
$x = [Bar::class];
var_dump(Bar::X);
debug_zval_dump($x); // Will show negative refcount
class Foo {
const X = 1;
}
However, this doesn't really fix the root cause, there are probably
other situations where something similar can occur.
The fix for bug #78241 assumed that `time_t` would always be 64bit, but
actually is 32bit for x86. We therefore enforce 64bit arithmetic to
avoid wrapping.
Fix #78346: strip_tags no longer handling nested php tags
When the strip tags state machine has been flattened, an if statement
has mistakenly been treated as else if. We fix this, and also simplify
a bit right away.
Fix #78179: MariaDB server version incorrectly detected
As of MariaDB 10.0.2, the server reports a fake version number as work-
around for replication issues[1]. We apply the same "fix" as in the
MariaDB client to cater to this.
There are a few parts here:
* opcache should not be blocking signals while invoking compile_file,
otherwise signals may remain blocked on a compile error. While at
it, also protect SHM memory during compile_file.
* We should deactivate Zend signals at the end of the request, to make
sure that we gracefully recover from a missing unblock and signals
don't remain blocked forever.
* We don't use a critical section in deactivation, because it should
not be necessary. Additionally we want to clean up the signal queue,
if it is non-empty.
* Enable SIGG(check) in debug builds so we notice issues in the future.
The smart branch logic assumed b->start refers to the old offsets,
while b->start was already adjusted to the new offsets at this
point. Delay the change until later.
Maksim Nikulin [Wed, 23 Jan 2019 05:19:29 +0000 (12:19 +0700)]
Prevent use after free in fpm_event_epoll_wait
epoll event backend does not guarantee that child input/output events
are reported before SIGCHILD due to finished worker. While a bunch of
events received by epoll is being processed, child-related structures
may be removed before dispatching of an I/O event for the same child.
The result may be attempt to access to memory region allocated for
another purpose, segfault of the master process, and unavailable web
sites.
Postpone processing of SIGCHILD events till other events in the same
bunch are processed.
Fix Bug #62418 php-fpm master process crashes
Fix Bug #65398 Race condition between SIGCHLD and child stdout/stderr event leads to segfault
Fix Bug #75112 php-fpm crashing, hard to reproduce
Fix Bug #77114 php-fpm master segfaults in fpm_event_epoll_wait/fpm_event_fire
Fix Bug #77185 Use-after-free in FPM master event handling
George Wang [Sun, 21 Jul 2019 03:59:43 +0000 (23:59 -0400)]
Checked in LiteSpeed SAPI 7.5, addressed two main problems in "clean shutdown" introduced in 7.4.3,
1. falls in an infinite loop because PHP engine's inconsistent state, now override the ITIMER_PROF to 0.1 second, clean shutdown must finish before that.
2. generate too much error log, we completely disable "error_reporting" before calling php_request_shutdown().
New opcache directives have been added recently which are returned
if using `ini_get_all('zend opcache')` but are not listed in the
directives if using `opcache_get_configuration()`. This fix adds
those missing directives as well as if `opcache.mmap_base` is used
instead of `opcache.lockfile_path`. Also adds a test to ensure the
directives match with both methods of fetching.
Since syslog's ident and facility parameters have been added to
config[1], vsyslog() segfaults on Windows, if openlog() has not been
called before. We bring back the removed lines to fix this.
When cleaning nops in the dfa pass, we were always keeping the
smart branch inhibiting nop that occurs directly before the jump
instruction. However, as we skip unreachable blocks entirely, it
may happen that we need to keep a nop that occurs further back,
prior to the unreachable blocks. Account for that case now.
We should really do something about the smart branch situation,
this is very fragile...
This changes causes issues for Symfony, see
https://github.com/symfony/symfony/issues/32395. I'm reverting it
from PHP 7.2 and PHP 7.3 and only leaving it in PHP 7.4.
Over the years, multiple security vulnerabilities[1] have been found
and fixed in SQLite3, so it makes sense to update our bundled libsqlite
to the latest available version.
projects / php / log