From: Jarkko Sakkinen jarkko@kernel.org
mainline inclusion from mainline-v5.11-rc1 commit 14132a5b807bb5caf778fe7ae1597e630971e949 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4SIGI CVE: NA
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Return -ERESTARTSYS instead of -EINTR in sgx_ioc_enclave_add_pages() when interrupted before any pages have been processed. At this point ioctl can be obviously safely restarted.
Intel-SIG: commit 14132a5b807b x86/sgx: Return -ERESTARTSYS in sgx_ioc_enclave_add_pages() Backport for SGX Foundations support
Reported-by: Haitao Huang haitao.huang@intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org Signed-off-by: Borislav Petkov bp@suse.de Link: https://lkml.kernel.org/r/20201118213932.63341-1-jarkko@kernel.org Signed-off-by: Fan Du fan.du@intel.com #openEuler_contributor Signed-off-by: Laibin Qiu qiulaibin@huawei.com --- arch/x86/kernel/cpu/sgx/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c index 6d37117ac8a0..30aefc93a31d 100644 --- a/arch/x86/kernel/cpu/sgx/ioctl.c +++ b/arch/x86/kernel/cpu/sgx/ioctl.c @@ -444,7 +444,7 @@ static long sgx_ioc_enclave_add_pages(struct sgx_encl *encl, void __user *arg) for (c = 0 ; c < add_arg.length; c += PAGE_SIZE) { if (signal_pending(current)) { if (!c) - ret = -EINTR; + ret = -ERESTARTSYS;
break; }