-stable review patch. If anyone has any objections, please let us know.
------------------
From: Al Viro <[EMAIL PROTECTED]>
[PATCH] fix deadlock in audit_log_task_context()
GFP_KERNEL allocations in non-blocking context; fixed by killing
an idiotic use of security_getprocattr().
Acked-by: Stephen Smalley <[EMAIL PROTECTED]>
Acked-by: James Morris <[EMAIL PROTECTED]>
Cc: Chuck Ebbert <[EMAIL PROTECTED]>
Signed-off-by: Al Viro <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
kernel/auditsc.c | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -734,28 +734,26 @@ static inline void audit_free_context(st
void audit_log_task_context(struct audit_buffer *ab)
{
char *ctx = NULL;
- ssize_t len = 0;
+ unsigned len;
+ int error;
+ u32 sid;
- len = security_getprocattr(current, "current", NULL, 0);
- if (len < 0) {
- if (len != -EINVAL)
+ selinux_get_task_sid(current, &sid);
+ if (!sid)
+ return;
+
+ error = selinux_sid_to_string(sid, &ctx, &len);
+ if (error) {
+ if (error != -EINVAL)
goto error_path;
return;
}
- ctx = kmalloc(len, GFP_KERNEL);
- if (!ctx)
- goto error_path;
-
- len = security_getprocattr(current, "current", ctx, len);
- if (len < 0 )
- goto error_path;
-
audit_log_format(ab, " subj=%s", ctx);
+ kfree(ctx);
return;
error_path:
- kfree(ctx);
audit_panic("error in audit_log_task_context");
return;
}
--
-
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