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f3ec9c1f62
git will automatically change the length of the index hashes when formatting a patch depending on what references are present in the submodule. After pulling in the stable tags today, git wanted to add a character to all hashes for me. Use --full-index when generating the patches to avoid such issues in the future. No functional change intended. Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
32 lines
1.4 KiB
Diff
32 lines
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Date: Wed, 10 Apr 2024 13:21:59 +0200
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Subject: [PATCH] apparmor: expect msg_namelen=0 for recvmsg calls
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When coming from sys_recvmsg, msg->msg_namelen is explicitly set to
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zero early on. (see ____sys_recvmsg in net/socket.c)
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We still end up in 'map_addr' where the assumption is that addr !=
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NULL means addrlen has a valid size.
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This is likely not a final fix, it was suggested by jjohansen on irc
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to get things going until this is resolved properly.
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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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---
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security/apparmor/af_inet.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/security/apparmor/af_inet.c b/security/apparmor/af_inet.c
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index 57b710054a76582346f37671843f3f8d6e99331c..35f905d9b960f62fa2ecb80b5c1a8e9edecd9b5d 100644
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--- a/security/apparmor/af_inet.c
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+++ b/security/apparmor/af_inet.c
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@@ -766,7 +766,7 @@ int aa_inet_msg_perm(const char *op, u32 request, struct socket *sock,
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/* do we need early bailout for !family ... */
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return sk_has_perm2(sock->sk, op, request, profile, ad,
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map_sock_addr(sock, ADDR_LOCAL, &laddr, &ad),
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- map_addr(msg->msg_name, msg->msg_namelen, 0,
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+ map_addr(msg->msg_namelen == 0 ? NULL : msg->msg_name, msg->msg_namelen, 0,
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ADDR_REMOTE, &raddr, &ad),
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profile_remote_perm(profile, sock->sk, request,
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&raddr, &laddr.maddr, &ad));
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