Messages in this thread | | | Date | Mon, 07 Nov 2022 04:30:15 -0800 | Subject | Re: [PATCH] ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network | From | syzbot <> |
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> Hello: > > This patch was applied to netdev/net.git (master) > by David S. Miller <davem@davemloft.net>: > > On Fri, 4 Nov 2022 11:32:16 +0100 you wrote: >> When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved >> remained uninitialized, resulting in a 1-byte infoleak: >> >> BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841 >> __netdev_start_xmit ./include/linux/netdevice.h:4841 >> netdev_start_xmit ./include/linux/netdevice.h:4857 >> xmit_one net/core/dev.c:3590 >> dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606 >> __dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256 >> dev_queue_xmit ./include/linux/netdevice.h:3009 >> __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 >> __netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325 >> netlink_deliver_tap net/netlink/af_netlink.c:338 >> __netlink_sendskb net/netlink/af_netlink.c:1263 >> netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272 >> netlink_unicast+0x56d/0xf50 net/netlink/af_netlink.c:1360 >> nlmsg_unicast ./include/net/netlink.h:1061 >> rtnl_unicast+0x5a/0x80 net/core/rtnetlink.c:758 >> ip6addrlbl_get+0xfad/0x10f0 net/ipv6/addrlabel.c:628 >> rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 >> ... >> Uninit was created at: >> slab_post_alloc_hook+0x118/0xb00 mm/slab.h:742 >> slab_alloc_node mm/slub.c:3398 >> __kmem_cache_alloc_node+0x4f2/0x930 mm/slub.c:3437 >> __do_kmalloc_node mm/slab_common.c:954 >> __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975 >> kmalloc_reserve net/core/skbuff.c:437 >> __alloc_skb+0x27a/0xab0 net/core/skbuff.c:509 >> alloc_skb ./include/linux/skbuff.h:1267 >> nlmsg_new ./include/net/netlink.h:964 >> ip6addrlbl_get+0x490/0x10f0 net/ipv6/addrlabel.c:608 >> rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 >> netlink_rcv_skb+0x299/0x550 net/netlink/af_netlink.c:2540 >> rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6109 >> netlink_unicast_kernel net/netlink/af_netlink.c:1319 >> netlink_unicast+0x9ab/0xf50 net/netlink/af_netlink.c:1345 >> netlink_sendmsg+0xebc/0x10f0 net/netlink/af_netlink.c:1921 >> ... >> >> [...] > > Here is the summary with links: > - ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network > https://git.kernel.org/netdev/net/c/c23fb2c82267 > > You are awesome, thank you! > -- > Deet-doot-dot, I am a bot. > https://korg.docs.kernel.org/patchwork/pwbot.html > >
I see the command but can't find the corresponding bug. The email is sent to syzbot+HASH@syzkaller.appspotmail.com address but the HASH does not correspond to any known bug. Please double check the address.
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