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glibc/string
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Leonhard Holz 0f9e585480 Fix memory handling in strxfrm_l [BZ #16009] 
[Modified from the original email by Siddhesh Poyarekar]

This patch solves bug #16009 by implementing an additional path in
strxfrm that does not depend on caching the weight and rule indices.

In detail the following changed:

* The old main loop was factored out of strxfrm_l into the function
do_xfrm_cached to be able to alternativly use the non-caching version
do_xfrm.

* strxfrm_l allocates a a fixed size array on the stack. If this is not
sufficiant to store the weight and rule indices, the non-caching path is
taken. As the cache size is not dependent on the input there can be no
problems with integer overflows or stack allocations greater than
__MAX_ALLOCA_CUTOFF. Note that malloc-ing is not possible because the
definition of strxfrm does not allow an oom errorhandling.

* The uncached path determines the weight and rule index for every char
and for every pass again.

* Passing all the locale data array by array resulted in very long
parameter lists, so I introduced a structure that holds them.

* Checking for zero src string has been moved a bit upwards, it is
before the locale data initialization now.

* To verify that the non-caching path works correct I added a test run
to localedata/sort-test.sh & localedata/xfrm-test.c where all strings
are patched up with spaces so that they are too large for the caching path.
2015-01-13 11:33:56 +05:30
..
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bug-envz1.c
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inl-tester.c
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strxfrm_l.c Fix memory handling in strxfrm_l [BZ #16009] 2015-01-13 11:33:56 +05:30
strxfrm.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
swab.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
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tester.c Revert "Suppress warning in string/tester.c for gcc 4.9" 2015-01-06 18:43:28 +01:00
tst-bswap.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tst-endian.c Add #include <stdint.h> for uint[32|64]_t usage (except installed headers). 2013-05-16 11:32:54 -05:00
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tst-strtok.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-strxfrm2.c
tst-strxfrm.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-svc2.c
tst-svc.c
tst-svc.expect
tst-svc.input
Versions Sort Versions files 2013-02-17 16:34:04 +01:00
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