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CRED: Fix load_flat_shared_library() to initialise bprm correctly

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Fix binfmt_flag's load_flat_shared_library() to initialise bprm correctly.

Currently, prepare_binprm() is called with only .filename .file and .cred
fields set in bprm, but the .cred_prepared and .per_clear fields at least need
initialising.

Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
David Howells 2011-04-28 16:26:38 +01:00 committed by James Morris
parent db5ca356d8
commit 3a852d3bd5
1 changed files with 8 additions and 0 deletions
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8
fs/binfmt_flat.c
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@ -820,6 +820,8 @@ static int load_flat_shared_library(int id, struct lib_info *libs)
int res;
char buf[16];
memset(&bprm, 0, sizeof(bprm));
/* Create the file name */
sprintf(buf, "/lib/lib%d.so", id);
@ -835,6 +837,12 @@ static int load_flat_shared_library(int id, struct lib_info *libs)
if (!bprm.cred)
goto out;
/* We don't really care about recalculating credentials at this point
* as we're past the point of no return and are dealing with shared
* libraries.
*/
bprm.cred_prepared = 1;
res = prepare_binprm(&bprm);
if (!IS_ERR_VALUE(res))