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(parent: d3c4815) | patch
net: improve the user pointer check in init_user_sockptr
authorChristoph Hellwig <hch@lst.de>
Tue, 28 Jul 2020 16:38:36 +0000 (18:38 +0200)
committerDavid S. Miller <davem@davemloft.net>
Tue, 28 Jul 2020 20:43:40 +0000 (13:43 -0700)
commita31edb2059ed4e498f9aa8230c734b59d0ad797a
tree050f16554295c22db098bb4e81021e21d2718c5ftree | snapshot
parentd3c48151512922dd35f1f393b30b9138e4441d14commit | diff
net: improve the user pointer check in init_user_sockptr

Make sure not just the pointer itself but the whole range lies in
the user address space.  For that pass the length and then use
the access_ok helper to do the check.

Fixes: 6d04fe15f78a ("net: optimize the sockptr_t for unified kernel/user address spaces")
Reported-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/sockptr.h diff | blob | history
net/ipv4/bpfilter/sockopt.c diff | blob | history
net/socket.c diff | blob | history
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