Bug 183417

Summary:	[softupdates] [panic] fault on nofault entry in softdep_setup_freeblocks
Product:	Base System	Reporter:	rr
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Open ---
Severity:	Affects Only Me	Keywords:	crash
Priority:	Normal
Version:	Unspecified
Hardware:	Any
OS:	Any

Description rr 2013-10-28 21:20:01 UTC

We've seen this panic multiple times on hosts which are getting uncorrectable I/O errors from a spinning SATA disk:

root@mms983$ cat panic.txt
vm_fault: fault on nofault entry, addr: ffffffa010748000

b:0:kdb.enter.panic>  show pcpu
cpuid        = 12
dynamic pcpu = 0xffffff807faf8200
curthread    = 0xfffffe09675938e0: pid 57943 "beam.smp"
curpcb       = 0xffffffa31038ebc0
fpcurthread  = none
idlethread   = 0xfffffe0034935470: tid 100014 "idle: cpu12"
curpmap      = 0xfffffe01230ccbe8
tssp         = 0xffffffff80957340
commontssp   = 0xffffffff80957340
rsp0         = 0xffffffa31038ebc0
gs32p        = 0xffffffff80955498
ldt          = 0xffffffff809554d8
tss          = 0xffffffff809554c8
db:0:kdb.enter.panic>  bt
Tracing pid 57943 tid 43087119 td 0xfffffe09675938e0
kdb_enter() at kdb_enter+0x3b
panic() at panic+0x1c7
vm_fault_hold() at vm_fault_hold+0x1eea
vm_fault() at vm_fault+0x73
trap_pfault() at trap_pfault+0x41d
trap() at trap+0x365
calltrap() at calltrap+0x8
--- trap 0xc, rip = 0xffffffff8054c43c, rsp = 0xffffffa31038e490, rbp = 0xffffffa31038e520 ---
softdep_setup_freeblocks() at softdep_setup_freeblocks+0x3ec
ffs_truncate() at ffs_truncate+0x530
ufs_inactive() at ufs_inactive+0x1e5
VOP_INACTIVE_APV() at VOP_INACTIVE_APV+0x4a
vinactive() at vinactive+0x8d
vputx() at vputx+0x2d8
kern_unlinkat() at kern_unlinkat+0x1df
amd64_syscall() at amd64_syscall+0x5d6
Xfast_syscall() at Xfast_syscall+0xf7
--- syscall (10, FreeBSD ELF64, sys_unlink), rip = 0x80125e32c, rsp = 0x7ffffd1b3ea8, rbp = 0x825b5af40 ---

After reboot, we get a second panic:
root@mms983$ cat panic.txt
ufs_dirbad: /d6: bad dir ino 9708991 at offset 1536: mangled entry

After reboot and fsck, filesystem is working again.

Comment 1 Xin LI freebsd_committer

2014-02-24 05:03:31 UTC

Responsible Changed
From-To: freebsd-bugs->mckusick

Over to maintainer.

Comment 2 Eitan Adler freebsd_committer

2017-12-31 07:59:23 UTC

For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

Mail being skipped

Comment 3 Graham Perrin freebsd_committer

2022-10-17 12:17:30 UTC

Keyword: 

    crash

– in lieu of summary line prefix: 

    [panic]

* bulk change for the keyword
* summary lines may be edited manually (not in bulk). 

Keyword descriptions and search interface: 

    <https://bugs.freebsd.org/bugzilla/describekeywords.cgi>