On Thu, Oct 25, 2007 at 09:00:19AM +0300, Pekka Savola wrote:
> I'm the upstream maintainer of radvd and noticed this bug report.
> The problem is due to how early radvd drops root privileges and as
> an extension, how it cannot reconfigure the interface at SIGHUP
> signal if it has already dropped the privileges.
In how I experience this bug, radvd on startup (not SIGHUP) drops
privileges before it tries to reconfigure the interface. Strace
excerpt (in order):
1840 setuid32(106) = 0
1840 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb7de56f8)
= 1841
1841 open("/proc/sys/net/ipv6/conf/eth_jumbo/hop_limit",
O_WRONLY|O_CREAT|O_TRUNC, 0666) = -1 EACCES (Permission denied)
1841 open("/proc/sys/net/ipv6/conf/vlan1500/hop_limit",
O_WRONLY|O_CREAT|O_TRUNC, 0666) = -1 EACCES (Permission denied)
--
Lionel
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