bugzilla-daemon at mindrot.org
2015-May-20 06:38 UTC
[Bug 2401] New: sshd copying options leaks memory
https://bugzilla.mindrot.org/show_bug.cgi?id=2401 Bug ID: 2401 Summary: sshd copying options leaks memory Product: Portable OpenSSH Version: 6.8p1 Hardware: Other OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: sshd Assignee: unassigned-bugs at mindrot.org Reporter: jjelen at redhat.com Created attachment 2623 --> https://bugzilla.mindrot.org/attachment.cgi?id=2623&action=edit proposed patch To continue with my thematic reports about memory usage, valgrind showed up some more memory problems around handling server options. And after some basic understanding of what is going on around there, I came to this upstream commit: https://anongit.mindrot.org/openssh.git/commit/?id=d8478b6a9b32760d47c2419279c4a73f5f88fdb6 The core of problem is that when you read options from file, you allocate memory for them and then you copy them to another options structure using xstrdup, which leaves behind two copies abandoned. One is still left in old array (never freed) and the other is overwritten by a copy you are assigning to the target array. Proposing patch that handles memory proper way: 1) In first cycle go through the target array and free all strings 2) In second cycle move values from first array to the other It requires one more variable to operate (chosen classic i). Fortunately, the macro can't be used anywhere else so we can depend on local variable. -- You are receiving this mail because: You are watching the assignee of the bug.
bugzilla-daemon at bugzilla.mindrot.org
2018-Mar-26 14:17 UTC
[Bug 2401] sshd copying options leaks memory
https://bugzilla.mindrot.org/show_bug.cgi?id=2401 Jakub Jelen <jjelen at redhat.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #1 from Jakub Jelen <jjelen at redhat.com> --- This looks like resolved by the following upstream commit: https://github.com/openssh/openssh-portable/commit/dceabc7ad Thank you for taking care of this. -- You are receiving this mail because: You are watching the assignee of the bug.
bugzilla-daemon at mindrot.org
2021-Apr-23 04:59 UTC
[Bug 2401] sshd copying options leaks memory
https://bugzilla.mindrot.org/show_bug.cgi?id=2401 Damien Miller <djm at mindrot.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED --- Comment #2 from Damien Miller <djm at mindrot.org> --- closing resolved bugs as of 8.6p1 release -- You are receiving this mail because: You are watching the assignee of the bug.
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