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| author | Ari Kauppi <ari@synopsys.com> | 2017-05-05 16:07:55 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-05-09 17:09:18 -0400 |
| commit | b550a32e60a4941994b437a8d662432a486235a5 (patch) | |
| tree | ee8f276ffae29999291a7338cb4e3df02619863a /scripts/recordmcount.c | |
| parent | efda760fe95ea15291853c8fa9235c32d319cd98 (diff) | |
| download | lwn-b550a32e60a4941994b437a8d662432a486235a5.tar.gz lwn-b550a32e60a4941994b437a8d662432a486235a5.zip | |
nfsd: fix undefined behavior in nfsd4_layout_verify
UBSAN: Undefined behaviour in fs/nfsd/nfs4proc.c:1262:34
shift exponent 128 is too large for 32-bit type 'int'
Depending on compiler+architecture, this may cause the check for
layout_type to succeed for overly large values (which seems to be the
case with amd64). The large value will be later used in de-referencing
nfsd4_layout_ops for function pointers.
Reported-by: Jani Tuovila <tuovila@synopsys.com>
Signed-off-by: Ari Kauppi <ari@synopsys.com>
[colin.king@canonical.com: use LAYOUT_TYPE_MAX instead of 32]
Cc: stable@vger.kernel.org
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'scripts/recordmcount.c')
0 files changed, 0 insertions, 0 deletions