netdev - Re: [PATCH net-next 0/5] net: remove RTNL from fib_seq

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Message-Id: 
 <172868704123.3018281.4916763990451712900.git-patchwork-notify@kernel.org>
Date: Fri, 11 Oct 2024 22:50:41 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 dsahern@...nel.org, kuniyu@...zon.com, jiri@...nulli.us,
 netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 0/5] net: remove RTNL from fib_seq_sum()

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed,  9 Oct 2024 18:44:00 +0000 you wrote:
> This series is inspired by a syzbot report showing
> rtnl contention and one thread blocked in:
> 
> 7 locks held by syz-executor/10835:
>   #0: ffff888033390420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
>   #0: ffff888033390420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
>   #1: ffff88806df6bc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1ea/0x500 fs/kernfs/file.c:325
>   #2: ffff888026fcf3c8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x500 fs/kernfs/file.c:326
>   #3: ffffffff8f56f848 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x1b4/0x890 drivers/net/netdevsim/bus.c:166
>   #4: ffff88805e0140e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
>   #4: ffff88805e0140e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
>   #5: ffff88805c5fb250 (&devlink->lock_key#55){+.+.}-{3:3}, at: nsim_drv_probe+0xcb/0xb80 drivers/net/netdevsim/dev.c:1534
>   #6: ffffffff8fcd1748 (rtnl_mutex){+.+.}-{3:3}, at: fib_seq_sum+0x31/0x290 net/core/fib_notifier.c:46
> 
> [...]

Here is the summary with links:
  - [net-next,1/5] fib: rules: use READ_ONCE()/WRITE_ONCE() on ops->fib_rules_seq
    https://git.kernel.org/netdev/net-next/c/a716ff52bebf
  - [net-next,2/5] ipv4: use READ_ONCE()/WRITE_ONCE() on net->ipv4.fib_seq
    https://git.kernel.org/netdev/net-next/c/16207384d292
  - [net-next,3/5] ipv6: use READ_ONCE()/WRITE_ONCE() on fib6_table->fib_seq
    https://git.kernel.org/netdev/net-next/c/e60ea4544776
  - [net-next,4/5] ipmr: use READ_ONCE() to read net->ipv[46].ipmr_seq
    https://git.kernel.org/netdev/net-next/c/055202b16c58
  - [net-next,5/5] net: do not acquire rtnl in fib_seq_sum()
    https://git.kernel.org/netdev/net-next/c/2698acd6ea47

You are awesome, thank you!
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