Date: Thu, 21 Apr 2005 12:23:44 +0300 From: Danny Braniss <danny@cs.huji.ac.il> To: Danny Braniss <danny@cs.huji.ac.il> Cc: Kris Kennaway <kris@obsecurity.org> Subject: Re: panic: userret: Returning with 1 locks held. Message-ID: <E1DOXuS-000LIN-LZ@cs1.cs.huji.ac.il> In-Reply-To: Message from Danny Braniss <danny@cs.huji.ac.il> <E1DOXL1-000KTA-BL@cs1.cs.huji.ac.il>
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> with the latest kernel, the message changed somewhat, but the panic is > still there (this is an amd64): > > trap 12: page fault while in kernel mode > cpuid = 1; apic id = 01 > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xffffffff8038e3f5 > stack pointer = 0x10:0xffffffffb280e7b0 > frame pointer = 0x10:0xffffffffb280e7e0 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 241 (sh) > [thread pid 241 tid 100071 ] > Stopped at _mtx_lock_flags+0x35: cmpq $0x80779d40,0(%rdi) > db> tr > Tracing pid 241 tid 100071 td 0xffffff007ae25980 > _mtx_lock_flags() at _mtx_lock_flags+0x35 > exec_map_first_page() at exec_map_first_page+0x60 > kern_execve() at kern_execve+0x2a0 > execve() at execve+0x5d > syscall() at syscall+0x4ab > Xfast_syscall() at Xfast_syscall+0xa8 > --- syscall (59, FreeBSD ELF64, execve), rip = 0x80090630c, rsp = > 0x7fffffffcbf8, rbp = 0 --- > db> show lockedvnods > Locked vnodes > > 0xffffff0061a48000: tag union, type VREG > usecount 1, writecount 0, refcount 1 mountedhere 0 > flags (VV_TEXT) > lock type union: EXCL (count 1) by thread 0xffffff007ae25980 (pid 241) > vp=0xffffff0061a48000, uppervp=0, lowervp=0xffffff00626187e0 > union: lower > 0xffffff00626187e0: tag nfs, type VREG > usecount 1, writecount 0, refcount 3 mountedhere 0 > flags () > v_object 0xffffff007c3a87e0 ref 0 pages 1 > > fileid 47269 fsid 0x900ff01 > db> tr 241 > Tracing pid 241 tid 100071 td 0xffffff007ae25980 > _mtx_lock_flags() at _mtx_lock_flags+0x35 > exec_map_first_page() at exec_map_first_page+0x60 > kern_execve() at kern_execve+0x2a0 > execve() at execve+0x5d > syscall() at syscall+0x4ab > Xfast_syscall() at Xfast_syscall+0xa8 > --- syscall (59, FreeBSD ELF64, execve), rip = 0x80090630c, rsp = > 0x7fffffffcbf8, rbp = 0 --- > db> > the problem is in the unionfs, not loading the module gets me to the shell's prompt, im now trying i386 ... danny
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