https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250870
--- Comment #7 from commit-h...@freebsd.org --- A commit in branch releng/12.2 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=e682b62c96e94c60d830e4414215032e0d4f8dad commit e682b62c96e94c60d830e4414215032e0d4f8dad Author: Kristof Provost <k...@freebsd.org> AuthorDate: 2020-09-12 16:33:05 +0000 Commit: Ed Maste <ema...@freebsd.org> CommitDate: 2021-01-29 01:14:24 +0000 MFC r368237: if: Fix panic when destroying vnet and epair simultaneously When destroying a vnet and an epair (with one end in the vnet) we often panicked. This was the result of the destruction of the epair, which destroys both ends simultaneously, happening while vnet_if_return() was moving the struct ifnet to its home vnet. This can result in a freed ifnet being re-added to the home vnet V_ifnet list. That in turn panics the next time the ifnet is used. Prevent this race by ensuring that vnet_if_return() cannot run at the same time as if_detach() or epair_clone_destroy(). PR: 238870, 234985, 244703, 250870 Sponsored by: Modirum MDPay Approved by: so sys/net/if.c | 147 +++++++++++++++++++++++++++++++++++++------------------ sys/net/if_var.h | 24 ++------- 2 files changed, 104 insertions(+), 67 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
