https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255865
Bug ID: 255865
Summary: [PATCH] dev/ocs_fc: Fix uaf & double free bugs in
ocs_hw_async_call
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 224929
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=224929&action=edit
returns error message if sli_cmd_common_nop() failed
Bug File: sys/dev/ocs_fc/ocs_hw.c
In function ocs_hw_async_call, if sli_cmd_common_nop() failed, ctx will be
freed via ocs_free() at line 11,800. But the freed ctx is used in the later
callee ocs_hw_command(.., ctx->cmd, ..., ctx), which is a use after free bug.
If the later callee ocs_hw_command() failed, the freed ctx is freed again via
ocs_free() at line 11,806, which is a double free bug.
My patch returns the error message if sli_cmd_common_nop() failed, to avoid the
later uaf and double free bugs.
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