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| author | Florian Weimer <fweimer@redhat.com> | 2020-12-11 17:30:03 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2020-12-11 18:31:04 +0100 |
| commit | 9ffa50b26b0cb5d3043adf6d3d0b1ea735acc147 (patch) | |
| tree | 282edafe2868969dc6e734377d9f88f317c28059 /stdlib/fpioconst.c | |
| parent | cb81264fd9973cd95bbc71495185b98979d28918 (diff) | |
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elf: Include libc.so.6 as main program in dependency sort (bug 20972)
_dl_map_object_deps always sorts the initially loaded object first
during dependency sorting. This means it is relocated last in
dl_open_worker. This results in crashes in IFUNC resolvers without
lazy bindings if libraries are preloaded that refer to IFUNCs in
libc.so.6: the resolvers are called when libc.so.6 has not been
relocated yet, so references to _rtld_global_ro etc. crash.
The fix is to check against the libc.so.6 link map recorded by the
__libc_early_init framework, and let it participate in the dependency
sort.
This fixes bug 20972.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'stdlib/fpioconst.c')
0 files changed, 0 insertions, 0 deletions