unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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Code Pull requests 5 Wiki Activity

Have clone3 use libcap's cap_t definition #6

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steffo wants to merge 1 commit from feature/clone3-pcap-fix into master
pull from: feature/clone3-pcap-fix
merge into: unimore:master
Conversation 0 Commits 1 Files changed 1 +4 -15
1 changed files with 4 additions and 15 deletions
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19
tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c
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@ -89,15 +89,9 @@ static int test_clone3_set_tid(struct __test_metadata *_metadata,
return ret;
}
struct libcap {
struct __user_cap_header_struct hdr;
struct __user_cap_data_struct data[2];
};
static int set_capability(void)
{
cap_value_t cap_values[] = { CAP_SETUID, CAP_SETGID };
struct libcap *cap;
cap_value_t caps_values[] = { CAP_SETUID, CAP_SETGID, CAP_CHECKPOINT_RESTORE };
int ret = -1;
cap_t caps;
@ -113,14 +107,9 @@ static int set_capability(void)
goto out;
}
cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET);
cap_set_flag(caps, CAP_PERMITTED, 2, cap_values, CAP_SET);
cap = (struct libcap *) caps;
/* 40 -> CAP_CHECKPOINT_RESTORE */
cap->data[1].effective |= 1 << (40 - 32);
cap->data[1].permitted |= 1 << (40 - 32);
/* Restore CAP_SETUID, CAP_SETGID, and CAP_CHECKPOINT_RESTORE */
cap_set_flag(caps, CAP_EFFECTIVE, 3, caps_values, CAP_SET);
cap_set_flag(caps, CAP_PERMITTED, 3, caps_values, CAP_SET);
if (cap_set_proc(caps)) {
perror("cap_set_proc");