ext/session: fix cookie_lifetime overflow#21704
Open
jorgsowa wants to merge 3 commits intophp:masterfrom
Open
Conversation
When session.cookie_lifetime was set to a value larger than maxcookie, OnUpdateCookieLifetime returned SUCCESS without updating the internal long value, causing ini_get() string and PS(cookie_lifetime) to go out of sync. Now the value is properly clamped to maxcookie with both the string and internal long updated consistently, and a warning is emitted.
Girgias
reviewed
Apr 10, 2026
Member
Girgias
left a comment
Girgias
left a comment
There was a problem hiding this comment.
While at it could you fix the way we parse the string as well? As this probably allows non numeric strings and float strings.
ext/session/session.c
Outdated
Member
There was a problem hiding this comment.
We probably shouldn't be using atol() here. Possibly is_numeric string ?
Contributor
Author
There was a problem hiding this comment.
Nice idea. I have added proper validation for the type of value.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
When
session.cookie_lifetimewas set to a value larger than maxcookie,OnUpdateCookieLifetimereturned SUCCESS without updating the internal long value, causing ini_get() string and PS(cookie_lifetime) to go out of sync.Now the value is properly clamped to maxcookie with both the string and internal long updated consistently, and a warning is emitted.
Edit:
Added validation of value of maxcookie, only numeric strings are allowed.