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cap_fileargs: Fix a descriptor leak in the service process.

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The service handler for fileargs_open() tries to pre-open multiple files
and pass descriptors for each back to the sandboxed process in a single
message.  This is to amortize the cost of round-trips between the two
processes.

The service process adds a "cache" nvlist to the reply to "open",
containing file descriptors for pre-opened files.  However, when adding
that nvlist to the reply, it was making a copy, effectively leaking the
cached descriptors.

While here, fix spelling in a local variable name.

PR:		241226
Reviewed by:	oshogbo
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25095
This commit is contained in:
Mark Johnston 2020-06-01 15:32:13 +00:00
parent b7ec5dea64
commit c78e42e207
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361694
1 changed files with 5 additions and 5 deletions
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10
lib/libcasper/services/cap_fileargs/cap_fileargs.c
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@ -500,7 +500,7 @@ open_file(const char *name)
static void
fileargs_add_cache(nvlist_t *nvlout, const nvlist_t *limits,
const char *curent_name)
const char *current_name)
{
int type, i, fd;
void *cookie;
@ -527,9 +527,9 @@ fileargs_add_cache(nvlist_t *nvlout, const nvlist_t *limits,
break;
}
if (type != NV_TYPE_NULL ||
(curent_name != NULL && strcmp(fname, curent_name) == 0)) {
curent_name = NULL;
if (type != NV_TYPE_NULL || (current_name != NULL &&
strcmp(fname, current_name) == 0)) {
current_name = NULL;
i--;
continue;
}
@ -553,7 +553,7 @@ fileargs_add_cache(nvlist_t *nvlout, const nvlist_t *limits,
nvlist_add_binary(new, "stat", &sb, sizeof(sb));
}
nvlist_add_nvlist(nvlout, fname, new);
nvlist_move_nvlist(nvlout, fname, new);
}
cacheposition = cookie;
lastname = fname;