Date: Mon, 27 Jun 2005 16:56:14 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@freebsd.org Cc: Jeff Roberson <jroberson@chesapeake.net>, current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: "panic: mutex Giant not owned" in do_execve() Message-ID: <200506271656.15881.jhb@FreeBSD.org> In-Reply-To: <20050620164744.M66638@mail.chesapeake.net> References: <20050618005118.GA97030@xor.obsecurity.org> <20050620164744.M66638@mail.chesapeake.net>
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On Monday 20 June 2005 04:47 pm, Jeff Roberson wrote: > On Fri, 17 Jun 2005, Kris Kennaway wrote: > > quad e450 running up-to-date -current: > > > > panic: mutex Giant not owned at ../../../kern/kern_mutex.c:299 > > cpuid = 0 > > KDB: enter: panic > > [thread pid 52851 tid 100456 ] > > Stopped at kdb_enter+0x3c: ta %xcc, 1 > > db> wh > > Tracing pid 52851 tid 100456 td 0xfffff80077c61560 > > panic() at panic+0x16c > > _mtx_assert() at _mtx_assert+0x6c > > _mtx_unlock_flags() at _mtx_unlock_flags+0x68 > > do_execve() at do_execve+0xa0c > > Can you tell me what code is at do_execve+0xa0c? It's down below. It's the VFS_UNLOCK_GIANT() after the #ifdef MAC stuff: > > kern_execve() at kern_execve+0x7c > > execve() at execve+0x38 > > syscall() at syscall+0x2d4 > > -- reserved %o7=0 -- > > userland() at 0x40223400 > > user trace: trap %o7=0 > > pc 0x40223400, sp 0x7fdffffd021 > > done > > > > #12 0x00000000c01525cc in do_execve (td=0xfffff80077c61560, args=0xc, > > mac_p=0x0) at ../../../kern/kern_exec.c:789 > > #13 0x00000000c0151b3c in kern_execve (td=0xfffff80077c61560, > > args=0xeea6f670, mac_p=0x0) at > > ../../../kern/kern_exec.c:250 > > #14 0x00000000c0151a78 in execve (td=0xfffff80077c61560, uap=0xeea6f8c0) > > at ../../../kern/kern_exec.c:185 > > #15 0x00000000c02f3cd4 in syscall (tf=0xeea6f880) at > > ../../../sparc64/sparc64/trap.c:592 > > (kgdb) frame 12 > > #12 0x00000000c01525cc in do_execve (td=0xfffff80077c61560, args=0xc, > > mac_p=0x0) at ../../../kern/kern_exec.c:789 > > 789 VFS_UNLOCK_GIANT(vfslocked); > > (kgdb) list > > 784 #ifdef MAC > > 785 mac_execve_exit(imgp); > > 786 if (interplabel != NULL) > > 787 mac_vnode_label_free(interplabel); > > 788 #endif > > 789 VFS_UNLOCK_GIANT(vfslocked); > > 790 return (error); > > 791 } > > 792 > > 793 int See, line 789 here. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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