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s3:utils: Fix stack smashing in net offlinejoin

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Cast from 'uint32_t *' (aka 'unsigned int *') to 'size_t *' (aka
'unsigned long *') increases required alignment from 4 to 8

==10343==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffdc6784fc0 at pc 0x7f339f1ea500 bp 0x7ffdc6784ed0 sp 0x7ffdc6784ec8
WRITE of size 8 at 0x7ffdc6784fc0 thread T0
    #0 0x7f339f1ea4ff in fd_load ../../lib/util/util_file.c:220
    #1 0x7f339f1ea5a4 in file_load ../../lib/util/util_file.c:245
    #2 0x56363209a596 in net_offlinejoin_requestodj ../../source3/utils/net_offlinejoin.c:267
    #3 0x56363209a9d0 in net_offlinejoin ../../source3/utils/net_offlinejoin.c:74
    #4 0x56363208f61c in net_run_function ../../source3/utils/net_util.c:453
    #5 0x563631fe8a9f in main ../../source3/utils/net.c:1358
    #6 0x7f339b22c5af in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
    #7 0x7f339b22c678 in __libc_start_main_impl ../csu/libc-start.c:381
    #8 0x563631faf374 in _start ../sysdeps/x86_64/start.S:115

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15257

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Dec  5 12:05:24 UTC 2022 on sn-devel-184
This commit is contained in:
Andreas Schneider 2022-12-05 11:18:10 +01:00 committed by Andreas Schneider
parent b97d31abb4
commit ef8c8ac54c
1 changed files with 8 additions and 3 deletions
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11
source3/utils/net_offlinejoin.c
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@ -237,7 +237,7 @@ int net_offlinejoin_requestodj(struct net_context *c,
{
NET_API_STATUS status;
uint8_t *provision_bin_data = NULL;
uint32_t provision_bin_data_size = 0;
size_t provision_bin_data_size = 0;
uint32_t options = NETSETUP_PROVISION_ONLINE_CALLER;
const char *loadfile = NULL;
const char *windows_path = NULL;
@ -264,12 +264,17 @@ int net_offlinejoin_requestodj(struct net_context *c,
#endif
}
provision_bin_data = (uint8_t *)file_load(loadfile,
(size_t *)&provision_bin_data_size, 0, c);
provision_bin_data =
(uint8_t *)file_load(loadfile, &provision_bin_data_size, 0, c);
if (provision_bin_data == NULL) {
d_printf("Failed to read loadfile: %s\n", loadfile);
return -1;
}
if (provision_bin_data_size > UINT32_MAX) {
d_printf("provision binary data size too big: %zu\n",
provision_bin_data_size);
return -1;
}
status = NetRequestOfflineDomainJoin(provision_bin_data,
provision_bin_data_size,