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bd88cc7f4f
This commit fixes two different crashes related to kshdb: - When redirect is given an invalid file descriptor, a segfault no longer occurs. Reproducer: $ ksh -c 'redirect 9>&200000000000' - Fix a crash due to free(3) being used on an invalid pointer. This can be reproduced with kshdb (commands from att/ast#582): $ git clone https://github.com/rocky/kshdb.git $ cd kshdb $ ksh autogen.sh $ echo "print hi there" > $HOME/.kshdbrc $ ./kshdb -L . test/example/dbg-test1.sh src/cmd/ksh93/bltins/misc.c: b_dot_cmd(): - The string pointed to by shp->st.filename must be able to be freed from memory with free(3), so duplicate the string with strdup(3). src/cmd/ksh93/sh/io.c: sh_redirect(): - Show an error message when a file descriptor is invalid to fix a memory fault. |
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