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authorTavian Barnes <tavianator@tavianator.com>2023-09-06 14:59:59 -0400
committerTavian Barnes <tavianator@tavianator.com>2023-09-06 16:31:04 -0400
commit377709664480a30fa5acdd11c7ca8c16669678ce (patch)
tree3478c5b632658c9babb23c48406f082fb178d400 /tests/posix/not_prune.sh
parent37dd040e04bd23293b6e46f8f5af22ea07717894 (diff)
downloadbfs-377709664480a30fa5acdd11c7ca8c16669678ce.tar.xz
bfstd: Fix an OOB string index in xmbrtowc()
This bug could be reproduced with something like $ bfs -samefile $'\xFA\xFA' bfs: error: bfs: dstrnescat@src/dstring.c:252: wordesc() result truncated or worse, with -DNDEBUG, $ bfs -samefile $'.....................\xFA\xFA' bfs: error: bfs -samefile $'.....................\xFA\xFA\x00\x55\x53\x45\x52\x3D\x74\x61\x76\x69\x61\x6E\x61\x74\x6F\x72 bfs: error: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ bfs: error: No such file or directory. which prints the memory after the end of the string (in this case, the environment variable USER=tavianator). The bug was caused by the line `*i += len`, which was intended to be `*i = len`. But actually, the right behaviour seems to be `*i += 1`. Fixes: 19c96abe0a1ee56cf206fd5e87defb1fd3e0daa5
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