[#3927] shmat/shmdt causes munmap of non-mmaped memory error

Submitted By: Mike Frysinger

Open Date

2008-02-21 17:12:23 Close Date

2008-02-25 22:51:28

Priority:

Medium High Assignee:

Bryan Wu

Status:

Closed Fixed In Release:

N/A

Found In Release:

N/A Release:

Category:

N/A Board:

N/A

Processor:

N/A Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Fixed

Uboot version or rev.:

Toolchain version or rev.:

App binary format:

N/A

Summary: shmat/shmdt causes munmap of non-mmaped memory error

Details:

a simple test case from alsa-lib that involves sysv shared memory causes a munmap error from the kernel:

shmid = shmget(... IPC_CREAT ...);

ptr = shmat(shmid, 0, 0);

shmdt(ptr);

the full test case is attached

Follow-ups

--- Bryan Wu 2008-02-25 07:39:24

it should be fixed in trunk and branch

--- Mike Frysinger 2008-02-25 22:51:26

thanks, the test case and original issue (alsa) seems to be OK now

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