[PANIC] ffs_alloccg: map corrupted (2nd file system)

[David O'Brien]

FreeBSD 9.0-CURRENT #654 r215604M: Sat Nov 20 19:51:27 PST 2010
    rootk at dragon:/sys/i386/compile/DRAGON i386
[..]
start = 0, len = 2, fs = /jazz
panic: ffs_alloccg: map corrupted
cpuid = 2
KDB: stack backtrace:
db_trace_self_wrapper(c0839222,0,1,4,0,...) at 0xc04e9ab6 = db_trace_self_wrapper+0x26
kdb_backtrace(c0857e2a,2,c084c0c3,ea17f70c,2,...) at 0xc05fa2fa = kdb_backtrace+0x2a
panic(c084c0c3,0,2,c5d580d4,dc7d4000,...) at 0xc05cd297 = panic+0x117
ffs_mapsearch(3af3c10,0,8,0,0,...) at 0xc0751793 = ffs_mapsearch+0x153
ffs_alloccgblk(3af3c10,0,4000,5a5,0,...) at 0xc075198c = ffs_alloccgblk+0xec
ffs_alloccg(c7758ae0,291,3af3c10,0,4000,...) at 0xc07522b3 = ffs_alloccg+0x1b3
ffs_hashalloc(3af3c10,0,4000,4000,c0752100,...) at 0xc074ebb1 = ffs_hashalloc+0x41
ffs_alloc(c7758ae0,380c,0,3af3c10,0,...) at 0xc075332f = ffs_alloc+0x19f
ffs_balloc_ufs2(c7753110,e030000,0,4000,c8ac8880,...) at 0xc0755369 = ffs_balloc_ufs2+0x1689
ffs_write(ea17fb90,ea17fb4c,ea17fb10,c0778dc2,c7753168,...) at 0xc0777f66 = ffs_write+0x276
VOP_WRITE_APV(c08b0500,ea17fb90,c7753110,264,0,...) at 0xc07fb574 = VOP_WRITE_APV+0xe4
vn_write(c6cc6888,ea17fc24,c8ac8880,0,c88c2000,...) at 0xc065ec93 = vn_write+0x1c3
dofilewrite(ea17fc24,ffffffff,ffffffff,0,c6cc6888,...) at 0xc060a9f5 = dofilewrite+0x95
kern_writev(c88c2000,4,ea17fc24,ea17fc44,1,...) at 0xc060ac88 = kern_writev+0x58
write(c88c2000,ea17fcec,c88c2000,ea17fd28,e8e2d15e,...) at 0xc060ad0f = write+0x4f
syscallenter(c88c2000,ea17fce4,ea17fce4,0,0,...) at 0xc0605d43 = syscallenter+0x2c3
syscall(ea17fd28) at 0xc07dcf94 = syscall+0x34
Xint0x80_syscall() at 0xc07c8e91 = Xint0x80_syscall+0x21
--- syscall (4, FreeBSD ELF32, write), eip = 0x281e260b, esp = 0xbfbfb61c, ebp = 0xbfbfb638 ---
panic: bufwrite: buffer is not busy???
cpuid = 2

-- 
-- David  (obrien at FreeBSD.org)