From: YueHaibing yuehaibing@huawei.com

stable inclusion from stable-v4.19.251 commit f6d9b011d8019bb59be4b71dd3d7de7c5e769d3e category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8KNM7 CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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commit 53ad46169fe2996fe1b623ba6c9c4fa33847876f upstream.

As of commit 5801f064e351 ("net: ipv6: unexport __init-annotated seg6_hmac_init()"), EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic.

This remove the EXPORT_SYMBOL to fix modpost warning:

WARNING: modpost: vmlinux.o(___ksymtab+seg6_hmac_net_init+0x0): Section mismatch in reference from the variable __ksymtab_seg6_hmac_net_init to the function .init.text:seg6_hmac_net_init() The symbol seg6_hmac_net_init is exported and annotated __init Fix this by removing the __init annotation of seg6_hmac_net_init or drop the export.

Fixes: bf355b8d2c30 ("ipv6: sr: add core files for SR HMAC support") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: YueHaibing yuehaibing@huawei.com Link: https://lore.kernel.org/r/20220628033134.21088-1-yuehaibing@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org (cherry picked from commit f6d9b011d8019bb59be4b71dd3d7de7c5e769d3e) Signed-off-by: Liu Jian liujian56@huawei.com --- net/ipv6/seg6_hmac.c | 1 - 1 file changed, 1 deletion(-)

diff --git a/net/ipv6/seg6_hmac.c b/net/ipv6/seg6_hmac.c index 8546f94f30d47..013573f61f045 100644 --- a/net/ipv6/seg6_hmac.c +++ b/net/ipv6/seg6_hmac.c @@ -416,7 +416,6 @@ int __net_init seg6_hmac_net_init(struct net *net)

return 0; } -EXPORT_SYMBOL(seg6_hmac_net_init);

void seg6_hmac_exit(void) {