The master branch has been updated by Szabolcs Nagy <n...@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f4f8f4d4e0f92488431b268c8cd9555730b9afe9 commit f4f8f4d4e0f92488431b268c8cd9555730b9afe9 Author: Szabolcs Nagy <szabolcs.n...@arm.com> Date: Wed Dec 30 19:19:37 2020 +0000 elf: Use relaxed atomics for racy accesses [BZ #19329] This is a follow up patch to the fix for bug 19329. This adds relaxed MO atomics to accesses that were previously data races but are now race conditions, and where relaxed MO is sufficient. The race conditions all follow the pattern that the write is behind the dlopen lock, but a read can happen concurrently (e.g. during tls access) without holding the lock. For slotinfo entries the read value only matters if it reads from a synchronized write in dlopen or dlclose, otherwise the related dtv entry is not valid to access so it is fine to leave it in an inconsistent state. The same applies for GL(dl_tls_max_dtv_idx) and GL(dl_tls_generation), but there the algorithm relies on the fact that the read of the last synchronized write is an increasing value. Reviewed-by: Adhemerval Zanella <adhemerval.zane...@linaro.org> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863162 Title: Inconsistency detected by ld.so: dl-tls.c: 493: _dl_allocate_tls_init: Assertion `listp->slotinfo[cnt].gen <= GL(dl_tls_generation)' failed! To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1863162/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
