https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230857
--- Comment #11 from commit-h...@freebsd.org --- A commit references this bug: Author: bz Date: Sun Nov 4 06:25:07 UTC 2018 New revision: 340109 URL: https://svnweb.freebsd.org/changeset/base/340109 Log: MFC r340009: carpstats are the last virtualised variable in the file and end up at the end of the vnet_set. The generated code uses an absolute relocation at one byte beyond the end of the carpstats array. This means the relocation for the vnet does not happen for carpstats initialisation and as a result the kernel panics on module load. This problem has only been observed with carp and only on i386. We considered various possible solutions including using linker scripts to add padding to all kernel modules for pcpu and vnet sections. While the symbols (by chance) stay in the order of appearance in the file adding an unused non-file-local variable at the end of the file will extend the size of set_vnet and hence make the absolute relocation for carpstats work (think of this as a single-module set_vnet padding). This is a (tmporary) hack. It is the least intrusive one as we need a timely solution for the upcoming release. We will revisit the problem in HEAD. For a lot more information and the possible alternate solutions please see the PR and the references therein. PR: 230857 Approved by: re (kib) Changes: _U stable/12/ stable/12/sys/netinet/ip_carp.c -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ freebsd-toolchain@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
