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cifs: ntstatus_to_dos_map[] is not terminated

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Functions that walk the ntstatus_to_dos_map[] array could
run off the end. For example, ntstatus_to_dos() loops
while ntstatus_to_dos_map[].ntstatus is not 0. Granted,
this is mostly theoretical, but could be used as a DOS attack
if the error code in the SMB header is bogus.

[Might consider adding to stable, as this patch is low risk - Steve]

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Tim Gardner 2013-10-13 13:29:03 -06:00 committed by Steve French
parent dde2356c84
commit 0c26606cbe
1 changed files with 3 additions and 1 deletions
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4
fs/cifs/netmisc.c
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@ -780,7 +780,9 @@ static const struct {
ERRDOS, ERRnoaccess, 0xc0000290}, {
ERRDOS, ERRbadfunc, 0xc000029c}, {
ERRDOS, ERRsymlink, NT_STATUS_STOPPED_ON_SYMLINK}, {
ERRDOS, ERRinvlevel, 0x007c0001}, };
ERRDOS, ERRinvlevel, 0x007c0001}, {
0, 0, 0 }
};
/*****************************************************************************
Print an error message from the status code