Date: Thu, 21 Apr 2005 11:47:07 +0300 From: Danny Braniss <danny@cs.huji.ac.il> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-amd64@freebsd.org Subject: Re: panic: userret: Returning with 1 locks held. Message-ID: <E1DOXL1-000KTA-BL@cs1.cs.huji.ac.il> In-Reply-To: Message from Kris Kennaway <kris@obsecurity.org> <20050330144447.GA83108@xor.obsecurity.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?E1DOXL1-000KTA-BL>