Re: [PATCH net v2 5/7] ipv6: reset value and position for proxy_ndp sysctl restart
From: Nicolas Dichtel <hidden>
Date: 2026-06-22 11:48:14
Le 20/06/2026 à 18:18, Fernando Fernandez Mancera a écrit :
When handling proxy_ndp, if rtnl_net_trylock() fails, the operation is
retried but as the value was already modified by the initial
proc_dointvec() call, the restarted syscall will read the newly modified
value as the 'old' state.
Fix this by taking the RTNL lock before parsing the input value if the
operation is a write.
Fixes: c92d5491a6d9 ("netconf: add support for IPv6 proxy_ndp")
Signed-off-by: Fernando Fernandez Mancera <redacted>Reviewed-by: Nicolas Dichtel <redacted>