Re: IPv4: sysctl table check failed [was: mmotm 2010-10-07-14-08 uploaded]

On Fri, 08 Oct 2010 00:06:49 +0200
Jiri Slaby <jirislaby@xxxxxxxxx> wrote:

On 10/07/2010 11:08 PM, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
The mm-of-the-moment snapshot 2010-10-07-14-08 has been uploaded to

Hi, I got bunch of "sysctl table check failed" below. All seem to be
related to ipv4:

sysctl table check failed: /net/ipv4/tcp_mem No min
Pid: 1, comm: swapper Not tainted 2.6.36-rc7-mm1_64+ #1285
Call Trace:
[<ffffffff8108d444>] set_fail+0xa4/0xf0
[<ffffffff8108d736>] sysctl_check_table+0x2a6/0x310
[<ffffffff8108d4eb>] sysctl_check_table+0x5b/0x310
[<ffffffff8108d4eb>] sysctl_check_table+0x5b/0x310
[<ffffffff81072204>] __register_sysctl_paths+0xf4/0x320
[<ffffffff815c1232>] ? printk+0x3c/0x42
[<ffffffff8115d3bc>] ? sysfs_add_file+0xc/0x10
[<ffffffff818b18bd>] ? sysctl_ipv4_init+0x0/0x87
[<ffffffff81072456>] register_sysctl_paths+0x26/0x30
[<ffffffff818b18fd>] sysctl_ipv4_init+0x40/0x87
[<ffffffff810002df>] do_one_initcall+0x3f/0x170
[<ffffffff81884d44>] kernel_init+0x158/0x1e2
[<ffffffff8102fb54>] kernel_thread_helper+0x4/0x10
[<ffffffff81884bec>] ? kernel_init+0x0/0x1e2
[<ffffffff8102fb50>] ? kernel_thread_helper+0x0/0x10

OK, thanks.

Eric D's net-avoid-limits-overflow.patch switched tcp_mem and udp_mem
from proc_dointvec() to proc_doulongvec_minmax(). And
sysctl_check_table() checks `min' and `max' for
proc_doulongvec_minmax() but not for proc_dointvec().

I'm not sure which Eric to blame ;) .min and .max are optional, so
perhaps the check is wrong?

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