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vsock: Use container_of() to get net namespace in sysctl handlers

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current->nsproxy is should not be accessed directly as syzbot has found
that it could be NULL at times, causing crashes.  Fix up the af_vsock
sysctl handlers to use container_of() to deal with the current net
namespace instead of attempting to rely on current.

This is the same type of change done in commit 7f5611cbc4 ("rds:
sysctl: rds_tcp_{rcv,snd}buf: avoid using current->nsproxy")

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Fixes: eafb64f40c ("vsock: add netns to vsock core")
Link: https://patch.msgid.link/2026022318-rearview-gallery-ae13@gregkh
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Greg Kroah-Hartman
2026-02-23 18:32:18 +01:00
committed by Jakub Kicinski
parent 4b063c002c
commit 5cc619583c
1 changed files with 2 additions and 2 deletions
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4
net/vmw_vsock/af_vsock.c
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@@ -2825,7 +2825,7 @@ static int vsock_net_mode_string(const struct ctl_table *table, int write,
if (write)
return -EPERM;
net = current->nsproxy->net_ns;
net = container_of(table->data, struct net, vsock.mode);
return __vsock_net_mode_string(table, write, buffer, lenp, ppos,
vsock_net_mode(net), NULL);
@@ -2838,7 +2838,7 @@ static int vsock_net_child_mode_string(const struct ctl_table *table, int write,
struct net *net;
int ret;
net = current->nsproxy->net_ns;
net = container_of(table->data, struct net, vsock.child_ns_mode);
ret = __vsock_net_mode_string(table, write, buffer, lenp, ppos,
vsock_net_child_mode(net), &new_mode);