Messages in this thread Patch in this message | | | Date | Tue, 18 Sep 2007 03:17:23 -0700 | From | Andrew Morton <> | Subject | Re: 2.6.23-rc6-mm1: IPC: sleeping function called ... |
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On Tue, 18 Sep 2007 13:17:28 +0400 Alexey Dobriyan <adobriyan@sw.ru> wrote:
> I'm getting tons of this, and X fails to start > > CONFIG_SYSVIPC=y > CONFIG_SYSVIPC_SYSCTL=y > # CONFIG_PREEMPT_NONE is not set > # CONFIG_PREEMPT_VOLUNTARY is not set > CONFIG_PREEMPT=y > CONFIG_PREEMPT_BKL=y > CONFIG_DEBUG_PREEMPT=y > > BUG: sleeping function called from invalid context at kernel/rwsem.c:47 > in_atomic():1, irqs_disabled():0 > no locks held by X/5879. > [<c012bcb1>] down_write+0x15/0x50 > [<c01b53af>] do_shmat+0x235/0x3a0 > [<c0106be2>] sys_ipc+0x146/0x263 > [<c0102892>] sysenter_past_esp+0xa7/0xb5 > [<c0102856>] sysenter_past_esp+0x6b/0xb5 > =======================
Here's a bug:
--- a/ipc/util.c~ipc-integrate-ipc_checkid-into-ipc_lock-fix-2 +++ a/ipc/util.c @@ -691,7 +691,7 @@ struct kern_ipc_perm *ipc_lock(struct ip rcu_read_unlock(); return ERR_PTR(-EINVAL); } - + rcu_read_unlock(); return out; } _ but it still doesn't fix it.
Nadia, please review Documentation/SubmitChecklist. It contains stuff which would have prevented this.
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