Date: Wed, 13 Aug 2003 11:02:02 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: current@FreeBSD.org Subject: LOR: sigacts vs Giant Message-ID: <20030813180202.GA643@dhcp42.pn.xcllnt.net>
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Gang, When the copyout() in sendsig() fails and we call sigexit(), we get into the following LOR: lock order reversal 1st 0xe0000000300ffca8 sigacts (sigacts) @ kern/subr_trap.c:260 2nd 0xe000000000b75250 Giant (Giant) @ kern/kern_sig.c:2407 Stack backtrace: witness_lock Stopped at Debugger+0x31: nop.m 0x0 db> trace Debugger(0xe000000000a41340, 0xe00000000078abe0, 0xea3, 0x1) at Debugger+0x30 witness_lock(0xe000000000b75250, 0x8, 0xe000000000a3cdc9, 0x967) at witness_lock+0xf60 _mtx_lock_flags(0xe000000000b75250, 0x0, 0xe000000000a3cdc0, 0x967, 0xe000000000747470, 0x30d, 0xe000000000a5c661) at _mtx_lock_flags+0x130 sigexit(0xe00000002fa4c000, 0xb, 0xe00000002f94afc8, 0xe0000000009ebfe0) at sigexit+0x140 sendsig(0x400000000005fbf0, 0x2, 0xa00000002308d360, 0x0) at sendsig+0x520 postsig(0x2, 0xe00000002fa4c000, 0xe0000000300ff000, 0xe00000002f94afc8) at postsig+0x7f0 ast(0xa00000002308d400) at ast+0x820 : FYI, -- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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