Re: ext4 object already free.

From: Dave Jones
Date: Fri Apr 05 2013 - 09:50:23 EST


On Fri, Apr 05, 2013 at 12:25:53PM +0200, Jan Kara wrote:

> > [ 93.672257] [<ffffffff812c2da9>] sys_msgctl+0x139/0x400
> > [ 93.674641] [<ffffffff816c5d4d>] ? retint_swapgs+0xe/0x13
> > [ 93.677056] [<ffffffff810b6c55>] ? trace_hardirqs_on_caller+0x115/0x1a0
> > [ 93.679626] [<ffffffff8134b39e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> > [ 93.682159] [<ffffffff816cd942>] system_call_fastpath+0x16/0x1b
> > [ 93.799329] FIX kmalloc-64: Object at 0xffff88009997e620 not freed
> And then sys_msgctl() came and wanted to free it again without
> allocating. So it looks like a problem with IPC?

Seems plausible, considering the bugs Linus & others found there in the
last week. Should be fixed now, so I'll holler if I see this again.

thanks,

Dave


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