Date: Sun, 21 Dec 2014 07:40:48 -0600 From: Mahmoud Al-Qudsi <mqudsi@neosmart.net> To: freebsd-stable@freebsd.org Subject: fdescfs kernel panic on 10.1-RELEASE Message-ID: <796D07B5-4BEC-4E6E-BB7B-21951EB91E4B@neosmart.net>
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Hello all,
I have two very-similarily configured virtual machines, one of which =
will
instantly go into a kernel panic and reboots when I attempt to launch =
Chrome
(as a normal user, without root priviliges).=20
This is running on FreeBSD 10.1-RELEASE i386, under XOrg with the VESA =
driver.
Even though my kernel is built with BREAK_TO_DEBUGGER, Chromimum always =
causes
a hard restart of the entire machine - though KDB does print the kernel
stacktrace. Any idea how I can catch this?
Without ddb, I'm not sure where to go next to debug the issue.
This is the stack trace as reported by KDB on the serial console, and =
I've
attached the output of dtruss for the process in question.
Many thanks,
Mahmoud Al-Qudsi
processor eflags =3D interrupt enabled, resume, IOPL =3D 0
current process =3D 820 (chrome)
trld-elf.so.1`0x2dap n746cfb
umber =3D 12
panic: page fault
cpuid =3D 5
KDB: stack backtrace:
db_trace_self_wrapper(c11ca238,c141f650,c65fc620,c5b26478,c095dc76,...) =
at db_trace_self_wrapper+0x2d/frame 0xc5b26448
kdb_backtrace(c138ccff,5,c1095b1c,c5b26504,c5db0cc8,...) at =
kdb_backtrace+0x30/frame 0xc5b264b0
vpanic(c5b26504,c5b26548,c104cd24,c1095b1c,c138e74d,...) at =
vpanic+0x11d/frame 0xc5b264ec
panic(c1095b1c,c138e74d,c65fc7c8,1,1,...) at panic+0x12/frame 0xc5b264f8
trap_fatal(5,0,c138e746,246,c107be3f,...) at trap_fatal+0x324/frame =
0xc5b26548
trap_pfault(c,c,c65fc620,c5b265e0,246,...) at trap_pfault+0x72/frame =
0xc5b265c0
trap(c5b26714) at trap+0x75e/frame 0xc5b26708
calltrap() at calltrap+0x6/frame 0xc5b26708
--- trap 0xc, eip =3D 0xc0c0363d, esp =3D 0xc5b26754, ebp =3D 0xc5b2675c =
---
strlen(f,c5b26848,c11c3301,246,c11c32a8,...) at strlen+0xd/frame =
0xc5b2675c
kvprintf(c11c328f,c0b7b3b0,c5b26848,a,c5b26890,...) at =
kvprintf+0x81e/frame 0xc5b26828
vsnprintf(c153c0b2,100,c11c328f,c5b26890,c5b26890,...) at =
vsnprintf+0x45/frame 0xc5b26860
kassert_panic(c11c328f,f,c655d0ef,b5,0,...) at kassert_panic+0x2d/frame =
0xc5b26884
__mtx_lock_flags(c66ccba4,0,c655d0ef,b5,c65fc620,...) at =
__mtx_lock_flags+0x17e/frame 0xc5b268b8
fdesc_allocvp(1,0,3,c65ca000,c5b26918,...) at fdesc_allocvp+0xad/frame =
0xc5b268e8
fdesc_lookup(c5b269a8,c1395423,c11fbb35,c11d6ef8,c14798f0,...) at =
fdesc_lookup+0x1f0/frame 0xc5b26940
VOP_LOOKUP_APV(c655e2f8,c5b269a8,c5b26b64,31b,0,...) at =
VOP_LOOKUP_APV+0x12f/frame 0xc5b26970
lookup(c5b26b08,c5b26a40,110,d5,1101,...) at lookup+0x514/frame =
0xc5b269d0
namei(c5b26b08,0,4000144,0,bf9fd6d1,...) at namei+0x4fd/frame 0xc5b26a68
kern_statat_vnhook(c65fc620,0,ffffff9c,bf9fd6d1,0,...) at =
kern_statat_vnhook+0xbd/frame 0xc5b26ba8
sys_stat(c65fc620,c5b26cc8,c14385b4,c5b26cc8,0,...) at =
sys_stat+0x5a/frame 0xc5b26c40
syscall(c5b26d08) at syscall+0x31b/frame 0xc5b26cfc
Xint0x80_syscall() at Xint0x80_syscall+0x21/frame 0xc5b26cfc
--- syscall (188, FreeBSD ELF32, sys_stat), eip =3D 0x2f0536e7, esp =3D =
0xbf9fd68c, ebp =3D 0xbf9fd898 =E2=80=94
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