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* [Bug dynamic-link/29078] New: <dlfcn.h> functions unusable during early auditing
@ 2022-04-20 20:07 fweimer at redhat dot com
2022-04-20 20:17 ` [Bug dynamic-link/29078] " fweimer at redhat dot com
2022-04-20 20:51 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2022-04-20 20:07 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=29078
Bug ID: 29078
Summary: <dlfcn.h> functions unusable during early auditing
Product: glibc
Version: 2.36
Status: NEW
Severity: normal
Priority: P2
Component: dynamic-link
Assignee: unassigned at sourceware dot org
Reporter: fweimer at redhat dot com
Target Milestone: ---
The rtld_active () check incorrectly fails during early auditing: ld.so is
flagged as not initialized, but neither is the static dlopen hook, so using
that hook crashes.
The fix is to use the partially initialized ld.so during early auditing. In
fact, the rtld_active () check is no longer necessary because the hook pointer
is now in _rtld_global_ro and protected by RELRO.
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* [Bug dynamic-link/29078] <dlfcn.h> functions unusable during early auditing
2022-04-20 20:07 [Bug dynamic-link/29078] New: <dlfcn.h> functions unusable during early auditing fweimer at redhat dot com
@ 2022-04-20 20:17 ` fweimer at redhat dot com
2022-04-20 20:51 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2022-04-20 20:17 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=29078
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Flags| |security-
Assignee|unassigned at sourceware dot org |fweimer at redhat dot com
CC| |fweimer at redhat dot com
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* [Bug dynamic-link/29078] <dlfcn.h> functions unusable during early auditing
2022-04-20 20:07 [Bug dynamic-link/29078] New: <dlfcn.h> functions unusable during early auditing fweimer at redhat dot com
2022-04-20 20:17 ` [Bug dynamic-link/29078] " fweimer at redhat dot com
@ 2022-04-20 20:51 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2022-04-20 20:51 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=29078
--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
Patch posted:
[PATCH] dlfcn: Do not use rtld_active () to determine ld.so state (bug 29078)
https://sourceware.org/pipermail/libc-alpha/2022-April/138015.html
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2022-04-20 20:07 [Bug dynamic-link/29078] New: <dlfcn.h> functions unusable during early auditing fweimer at redhat dot com
2022-04-20 20:17 ` [Bug dynamic-link/29078] " fweimer at redhat dot com
2022-04-20 20:51 ` fweimer at redhat dot com
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