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pal: Fix crash caused by getpwuid() returning NULL

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On lightweight Linux distribution, like alpine, getpwuid()
returns NULL, and errno is ENOENT, this patch fix crash
caused by this situation.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
This commit is contained in:
Tianjia Zhang 2020-06-04 15:19:33 +08:00 committed by Tate Tian
parent e8c48161b5
commit aed88145f2
1 changed files with 4 additions and 1 deletions
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5
src/pal/src/pal_enclave.c
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@ -66,7 +66,10 @@ int pal_init_enclave(const char *instance_dir) {
* if there is no token, then create a new one. * if there is no token, then create a new one.
*/ */
/* try to get the token saved in $HOME */ /* try to get the token saved in $HOME */
const char *home_dir = getpwuid(getuid())->pw_dir; const char *home_dir = NULL;
struct passwd *pw = getpwuid(getuid());
if (pw != NULL)
home_dir = pw->pw_dir;
if (home_dir != NULL && if (home_dir != NULL &&
(strlen(home_dir) + strlen("/") + sizeof(TOKEN_FILENAME) + 1) <= MAX_PATH) { (strlen(home_dir) + strlen("/") + sizeof(TOKEN_FILENAME) + 1) <= MAX_PATH) {