From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- include/net/transp_v6.h | 63 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/net/transp_v6.h (limited to 'include/net/transp_v6.h') diff --git a/include/net/transp_v6.h b/include/net/transp_v6.h new file mode 100644 index 000000000..c0a421fe0 --- /dev/null +++ b/include/net/transp_v6.h @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TRANSP_V6_H +#define _TRANSP_V6_H + +#include +#include + +/* IPv6 transport protocols */ +extern struct proto rawv6_prot; +extern struct proto udpv6_prot; +extern struct proto tcpv6_prot; +extern struct proto pingv6_prot; + +struct flowi6; +struct ipcm6_cookie; + +/* extension headers */ +int ipv6_exthdrs_init(void); +void ipv6_exthdrs_exit(void); +int ipv6_frag_init(void); +void ipv6_frag_exit(void); + +/* transport protocols */ +int pingv6_init(void); +void pingv6_exit(void); +int rawv6_init(void); +void rawv6_exit(void); +int udpv6_init(void); +void udpv6_exit(void); +int tcpv6_init(void); +void tcpv6_exit(void); + +/* this does all the common and the specific ctl work */ +void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, + struct sk_buff *skb); +void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, + struct sk_buff *skb); +void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, + struct sk_buff *skb); + +int ip6_datagram_send_ctl(struct net *net, struct sock *sk, struct msghdr *msg, + struct flowi6 *fl6, struct ipcm6_cookie *ipc6); + +void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, + __u16 srcp, __u16 destp, int rqueue, int bucket); +static inline void +ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, __u16 srcp, + __u16 destp, int bucket) +{ + __ip6_dgram_sock_seq_show(seq, sp, srcp, destp, sk_rmem_alloc_get(sp), + bucket); +} + +#define LOOPBACK4_IPV6 cpu_to_be32(0x7f000006) + +#define IPV6_SEQ_DGRAM_HEADER \ + " sl " \ + "local_address " \ + "remote_address " \ + "st tx_queue rx_queue tr tm->when retrnsmt" \ + " uid timeout inode ref pointer drops\n" + +#endif -- cgit v1.3.1