netdev - Re: [PATCH v3 net-next 00/12] ipv4: fib: Convert RTM_NEWROUTE and RTM

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Message-ID: <20250304063928.48e43593@kernel.org>
Date: Tue, 4 Mar 2025 06:39:28 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: "David S. Miller" <davem@...emloft.net>, David Ahern
 <dsahern@...nel.org>, Eric Dumazet <edumazet@...gle.com>, "Paolo Abeni"
 <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, Kuniyuki Iwashima
 <kuni1840@...il.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net-next 00/12] ipv4: fib: Convert RTM_NEWROUTE and
 RTM_DELROUTE to per-netns RTNL.

On Thu, 27 Feb 2025 20:23:16 -0800 Kuniyuki Iwashima wrote:
> Patch 1 is misc cleanup.
> Patch 2 ~ 8 converts two fib_info hash tables to per-netns.
> Patch 9 ~ 12 converts rtnl_lock() to rtnl_net_lcok().

I think there's another leak. Not 100% reproducible but one of the runs
of the device csum test hit:

unreferenced object 0xffff888005c35440 (size 1576):
  comm "csum", pid 366, jiffies 4294693057
  hex dump (first 32 bytes):
    c0 00 02 01 c0 00 02 02 00 00 00 00 84 d0 ff 00  ................
    02 00 01 41 00 00 00 00 00 00 00 00 00 00 00 00  ...A............
  backtrace (crc 3c3950b5):
    kmem_cache_alloc_noprof+0x2ad/0x350
    sk_prot_alloc.constprop.0+0x4e/0x1b0
    sk_alloc+0x36/0x6c0
    inet_create.part.0.constprop.0+0x289/0xea0
    __sock_create+0x23c/0x6a0
    __sys_socket+0x11c/0x1e0
    __x64_sys_socket+0x72/0xb0
    do_syscall_64+0xc1/0x1d0
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

https://netdev-3.bots.linux.dev/vmksft-drv-hw-dbg/results/17921/2-csum-py/stdout