This patchset is to fix problems when bareudp is used nestedly. 1. If the NETIF_F_LLTX flag is not set, the lockdep warns about a possible deadlock scenario when bareudp interfaces are used nestedly. But, like other tunneling interfaces, bareudp doesn't need xmit lock. So, it sets NETIF_F_LLTTX. Lockdep no more warns about a possible deadlock scenario.
2. bareudp interface calculates min_headroom when it sends a packet. When it calculates min_headroom, it uses the size of struct iphdr even the ipv6 packet is going to be sent. It would result in a lack of headroom so eventually occurs kernel panic. Changelog v1 -> v2: - Change reproducer script in 1/2 patch. - Fix reproducer script in 2/2 patch. Taehee Yoo (2): bareudp: set NETIF_F_LLTX flag bareudp: Fix use of incorrect min_headroom size drivers/net/bareudp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- 2.17.1
