tree: https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git readlink head: aec1408b51975ee937ae79994bd3807c55ec09ca commit: 68177fb03256addf021583df6324a032662c7904 [8/11] vfs: convert ->readlink to same signature as ->get_link config: i386-randconfig-r0-201649 (attached as .config) compiler: gcc-5 (Debian 5.4.1-2) 5.4.1 20160904 reproduce: git checkout 68177fb03256addf021583df6324a032662c7904 # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): fs/proc/namespaces.c: In function 'proc_ns_readlink': >> fs/proc/namespaces.c:93:9: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized] return res; ^ vim +/res +93 fs/proc/namespaces.c 68177fb0 Miklos Szeredi 2016-12-09 77 68177fb0 Miklos Szeredi 2016-12-09 78 res = ERR_PTR(-ENOMEM); 68177fb0 Miklos Szeredi 2016-12-09 79 if (!name) 68177fb0 Miklos Szeredi 2016-12-09 80 goto out_put; 68177fb0 Miklos Szeredi 2016-12-09 81 68177fb0 Miklos Szeredi 2016-12-09 82 err = ns_get_name(name, PROC_NS_LINK_MAX, task, ns_ops); 68177fb0 Miklos Szeredi 2016-12-09 83 if (err < 0) { 68177fb0 Miklos Szeredi 2016-12-09 84 kfree(name); 68177fb0 Miklos Szeredi 2016-12-09 85 res = ERR_PTR(err); 68177fb0 Miklos Szeredi 2016-12-09 86 goto out_put; 68177fb0 Miklos Szeredi 2016-12-09 87 } 68177fb0 Miklos Szeredi 2016-12-09 88 set_delayed_call(done, kfree_link, name); 68177fb0 Miklos Szeredi 2016-12-09 89 res = name; e149ed2b Al Viro 2014-11-01 90 } 68177fb0 Miklos Szeredi 2016-12-09 91 out_put: bf056bfa Eric W. Biederman 2011-06-18 92 put_task_struct(task); 5d826c84 Al Viro 2014-03-14 @93 return res; bf056bfa Eric W. Biederman 2011-06-18 94 } bf056bfa Eric W. Biederman 2011-06-18 95 bf056bfa Eric W. Biederman 2011-06-18 96 static const struct inode_operations proc_ns_link_inode_operations = { bf056bfa Eric W. Biederman 2011-06-18 97 .readlink = proc_ns_readlink, 6b255391 Al Viro 2015-11-17 98 .get_link = proc_ns_get_link, bf056bfa Eric W. Biederman 2011-06-18 99 .setattr = proc_setattr, bf056bfa Eric W. Biederman 2011-06-18 100 }; bf056bfa Eric W. Biederman 2011-06-18 101 :::::: The code at line 93 was first introduced by commit :::::: 5d826c847b34de6415b4f1becd88a57ff619af50 new helper: readlink_copy() :::::: TO: Al Viro <viro@xxxxxxxxxxxxxxxxxx> :::::: CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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