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This is just one bugfix for a bufferflow in knfsd's xdr decoding.

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Merge tag 'nfsd-5.16-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfix from Bruce Fields:
 "This is just one bugfix for a buffer overflow in knfsd's xdr decoding"

* tag 'nfsd-5.16-1' of git://linux-nfs.org/~bfields/linux:
  NFSD: Fix exposure in nfsd4_decode_bitmap()
This commit is contained in:
Linus Torvalds 2021-11-17 08:38:00 -08:00
commit ef1d8dda23
1 changed files with 2 additions and 5 deletions
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7
fs/nfsd/nfs4xdr.c
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@ -288,11 +288,8 @@ nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
p = xdr_inline_decode(argp->xdr, count << 2);
if (!p)
return nfserr_bad_xdr;
i = 0;
while (i < count)
bmval[i++] = be32_to_cpup(p++);
while (i < bmlen)
bmval[i++] = 0;
for (i = 0; i < bmlen; i++)
bmval[i] = (i < count) ? be32_to_cpup(p++) : 0;
return nfs_ok;
}