0002354: Fixing uClibc-0.9.29 ldso bug - BusyBox Bug and Patch Tracking

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Category

Severity

Reproducibility

Date Submitted

Last Update

0002354

[uClibc] Architecture Specific

minor

always

02-25-08 20:57

02-26-08 00:12

Reporter

Joe Lin

View Status

public

Assigned To

uClibc

Priority

normal

Resolution

fixed

Status

closed

Product Version

Summary

0002354: Fixing uClibc-0.9.29 ldso bug

Description

When a program is a shard executable (PT_DYNAMIC), ld-uClibc fails to execute, resulting in a Segmentation Fault. I have located and fixed the bug. Here is the patch.

------------------------------------------
diff -Naurd uClibc-0.9.29/ldso/ldso/ldso.c uClibc-0.9.29-p1/ldso/ldso/ldso.c
--- uClibc-0.9.29/ldso/ldso/ldso.c 2007-03-31 21:42:48.000000000 +0800
+++ uClibc-0.9.29-p1/ldso/ldso/ldso.c 2008-02-25 14:15:22.000000000 +0800
@@ -286,6 +286,7 @@
                        _dl_debug_early("calling mprotect on the application program\n");
                        /* Now cover the application program. */
                        if (app_tpnt->dynamic_info[DT_TEXTREL]) {
+ ElfW(Phdr) *ppnt; /* Don't affect outside ppnt */
                                ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
                                for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
                                        if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
------------------------------------------

Additional Information

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Notes
(0005324) carmelo73 02-26-08 00:10	Already fixed in SVN r20438 See change at http://www.uclibc.org/cgi-bin/viewcvs.cgi/trunk/uClibc/ldso/ldso/ldso.c?rev=20438&r1=18293&r2=20438&diff_format=h [^]

Issue History
Date Modified	Username	Field	Change
02-25-08 20:57	Joe Lin	New Issue
02-25-08 20:57	Joe Lin	Status	new => assigned
02-25-08 20:57	Joe Lin	Assigned To	=> uClibc
02-26-08 00:10	carmelo73	Status	assigned => resolved
02-26-08 00:10	carmelo73	Resolution	open => fixed
02-26-08 00:10	carmelo73	Note Added: 0005324
02-26-08 00:12	carmelo73	Status	resolved => closed