Date: Thu, 5 Oct 2006 08:19:53 +0800 From: David Xu <davidxu@freebsd.org> To: Kris Kennaway <kris@obsecurity.org> Cc: current@freebsd.org Subject: Re: Thread stuck in aioprn Message-ID: <200610050819.53832.davidxu@freebsd.org> In-Reply-To: <20061004203715.GA38692@xor.obsecurity.org> References: <20061004203715.GA38692@xor.obsecurity.org>
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On Thursday 05 October 2006 04:37, Kris Kennaway wrote: > When running stress2 I got an unkillable process stuck in the aioprn > state: > > #0 sched_switch (td=0xc5652bd0, newtd=0xc4916a20, flags=1) at atomic.h:265 > #1 0xc0549b96 in mi_switch (flags=1, newtd=0x0) at > ../../../kern/kern_synch.c:425 #2 0xc056baa6 in sleepq_switch (wchan=0x0) > at ../../../kern/subr_sleepqueue.c:450 #3 0xc056bc9b in sleepq_timedwait > (wchan=0xc5668c80) at ../../../kern/subr_sleepqueue.c:567 #4 0xc054959e in > msleep (ident=0xc5668c80, mtx=0xc5c6ee0c, priority=76, wmesg=0xc0763914 > "aioprn", timo=100) at ../../../kern/kern_synch.c:207 > #5 0xc05a0597 in aio_proc_rundown (arg=0x0, p=0xc5668b04) at > ../../../kern/vfs_aio.c:699 #6 0xc0524769 in exit1 (td=0xc5652bd0, rv=9) > at ../../../kern/kern_exit.c:237 #7 0xc0545eab in sigexit (td=0xc5652bd0, > sig=9) at ../../../kern/kern_sig.c:2883 #8 0xc0546c3b in postsig (sig=9) > at ../../../kern/kern_sig.c:2765 #9 0xc056e503 in ast (framep=0xed16dd38) > at ../../../kern/subr_trap.c:270 #10 0xc06ff61d in doreti_ast () at > ../../../i386/i386/exception.s:284 > > This was from the 'random syscall' test, so chances are there is some > insufficient error handling of invalid data here. > > Kris Are you using aio with non-disk file ? I know it is not safe to use aio with socket, pipe, fifo, etcs, only disk file may be safe. David Xu
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