[PATCH] audit: grab a reference to context->pwd when it's cached

On certain systems, in certain pathalogical cases, current's cwd can be deleted while we're still processing a syscall. This should prevent the system from evicting the inode while we're still referencing it. This seems to fix the bug I reported here: https://www.redhat.com/archives/linux-audit/2012-August/msg00017.html Signed-off-by: Peter Moody <pmoody(a)google.com&gt; --- kernel/auditsc.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 4b96415..e86b8b9 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2064,6 +2064,7 @@ void __audit_getname(const char *name) if (!context->pwd.dentry) get_fs_pwd(current->fs, &context->pwd); + path_get(&context->pwd); } /* audit_putname - intercept a putname request @@ -2091,6 +2092,7 @@ void audit_putname(const char *name) n->name, n->name ?: "(null)"); } #endif + path_put(&context->pwd); __putname(name); } #if AUDIT_DEBUG -- 1.7.7.3