Package: src:fakeroot Version: 1.26-1 Control: tags -1 ftbfs --
Dear maintainer, fakeroot fails to build on ppc64el since 1.26-1 https://buildd.debian.org/status/fetch.php?pkg=fakeroot&arch=ppc64el&ver=1.26-1&stamp=1630982822&raw=0 Backtrace from the core file : --- Core was generated by `chown -R daemon:sys 2 '. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x000005e13c212284 in 0000001b.plt_call.fdopendir@@GLIBC_2.17 () (gdb) bt #0 0x000005e13c212284 in 0000001b.plt_call.fdopendir@@GLIBC_2.17 () #1 0x000005e13c220fd4 in opendirat (dir_fd=-100, dir=0x5e13fb347b0 "2", extra_flags=32768, pnew_fd=0x7fffc6e5cab0) at lib/opendirat.c:44 #2 0x000005e13c21cb74 in fts_build (sp=0x5e13fb33ce0, type=3) at lib/fts.c:1340 #3 0x000005e13c21be60 in rpl_fts_read (sp=0x5e13fb33ce0) at lib/fts.c:940 #4 0x000005e13c214ca0 in chown_files (files=0x7fffc6e5d210, bit_flags=1040, uid=1, gid=3, required_uid=4294967295, required_gid=4294967295, chopt=0x7fffc6e5cd00) at src/chown-core.c:531 #5 0x000005e13c21349c in main (argc=4, argv=0x7fffc6e5d1f8) at src/chown.c:324 --- Bisecting the code I ended up with this commit : https://salsa.debian.org/clint/fakeroot/-/commit/f5e0a89ab6f0024f3d3bec5fd9cf631676b44f6c from which things start to fail. Especially the openat() function. What I noticed also is that lowering optimization to O0 makes the test work. Simple way to reproduce is on directories : --- mkdir bla LD_PRELOAD=./obj-sysv/.libs/libfakeroot-0.so /bin/rm -fr bla --- Each time fdopendir seg fault with the fd coming from openat right before. Not sure what optimization breaks, I just tried changing openat() to modify some aggressive optimization on that function and it helped. --- --- a/libfakeroot.c +++ b/libfakeroot.c @@ -2596,7 +2596,11 @@ #endif #ifdef HAVE_OPENAT +#if defined(__powerpc__) && defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +static int openat(int dir_fd, const char *pathname, int flags, ...) +#else int openat(int dir_fd, const char *pathname, int flags, ...) +#endif { mode_t mode; --- Hoping you'll get more ideas on this Regards, F.
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