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syscall: Fake uname to 4.19 for bpfloader/netd

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* Google is attempting to kill 4.14 in 0156d6e2ba

Change-Id: Ic87a66753a7acc89b0fe5b19158eea4c58ba980f
This commit is contained in:
Tim Zimmermann 2023-10-06 05:32:56 +02:00 • committed by Mustafa Gökmen
parent bb6f1de187
commit c0a56b4bc0
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GPG key ID: 3204D8100CFF21ED
1 changed files with 6 additions and 0 deletions
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6
kernel/sys.c
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@ -1346,6 +1346,12 @@ SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
down_read(&uts_sem); down_read(&uts_sem);
memcpy(&tmp, utsname(), sizeof(tmp)); memcpy(&tmp, utsname(), sizeof(tmp));
if (!strncmp(current->comm, "bpfloader", 9) ||
!strncmp(current->comm, "netd", 4)) {
strcpy(tmp.release, "4.19.0");
pr_debug("fake uname: %s/%d release=%s\n",
current->comm, current->pid, tmp.release);
}
up_read(&uts_sem); up_read(&uts_sem);
if (copy_to_user(name, &tmp, sizeof(tmp))) if (copy_to_user(name, &tmp, sizeof(tmp)))
return -EFAULT; return -EFAULT;