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dll: fuse: ReadDirectory: log invalid directory entries

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This commit is contained in:
Bill Zissimopoulos 2020-04-14 22:54:46 -07:00
parent b4c39f656c
commit 9066338220
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GPG Key ID: 3D4F95D52C7B3EA3
1 changed files with 27 additions and 2 deletions
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29
src/dll/fuse/fuse_intf.c
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@ -1734,6 +1734,21 @@ exit:
return Result;
}
static VOID fsp_fuse_intf_LogBadDirInfo(
const char *PosixPath, const char *PosixName, const char *Message)
{
static LONG Count = 0;
LONG NewCount;
NewCount = InterlockedIncrement(&Count);
/* log only the first 5 such warnings to avoid warning overload */
if (5 >= NewCount)
FspDebugLog("%S[TID=%04lx]: WARN: readdir(\"%s\"): name=\"%s\": %s\n",
FspDiagIdent(), GetCurrentThreadId(),
PosixPath, PosixName, Message);
}
/* !static: used by fuse2to3 */
int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
const struct fuse_stat *stbuf, fuse_off_t off)
@ -1759,13 +1774,19 @@ int fsp_fuse_intf_AddDirInfo(void *buf, const char *name,
SizeA = lstrlenA(name);
if (SizeA > 255)
/* ignore bad filenames; should we return error code? */
{
fsp_fuse_intf_LogBadDirInfo(filedesc->PosixPath, name,
"too long");
return 0;
}
SizeW = MultiByteToWideChar(CP_UTF8, 0, name, SizeA, DirInfo->FileNameBuf, 255);
if (0 == SizeW)
/* ignore bad filenames; should we return error code? */
{
fsp_fuse_intf_LogBadDirInfo(filedesc->PosixPath, name,
"MultiByteToWideChar failed");
return 0;
}
memset(DirInfo, 0, sizeof *DirInfo);
DirInfo->Size = (UINT16)(sizeof(FSP_FSCTL_DIR_INFO) + SizeW * sizeof(WCHAR));
@ -1866,8 +1887,12 @@ static NTSTATUS fsp_fuse_intf_FixDirInfo(FSP_FILE_SYSTEM *FileSystem,
Result = fsp_fuse_intf_GetFileInfoEx(FileSystem, PosixPath, 0,
&Uid, &Gid, &Mode, &DirInfo->FileInfo);
if (!NT_SUCCESS(Result))
{
/* mark the directory buffer entry as invalid */
*Index = FspFileSystemDirectoryBufferEntryInvalid;
fsp_fuse_intf_LogBadDirInfo(filedesc->PosixPath, PosixName,
"getattr failed");
}
if (0 != PosixPathEnd)
*PosixPathEnd = SavedPathChar;