Bug 26878

Summary: Kernel panic in nfs subststem (vrele: negative ref cnt)
Product: Base System Reporter: jfh <jfh>
Component: kernAssignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 4.2-STABLE   
Hardware: Any   
OS: Any   

Description jfh 2001-04-26 15:20:01 UTC 
	Kernel panic in the nfs subsystem. Here is the trace:

	  db> trace
	  Debugger(c0338723) at Debugger+0x34
	  panic(c033c69c,55,0,0,d6e1dcfc) at panic+0x70
	  vrele(d732bcc0) at vrele+0x92
	  nfsrv_symlink(c7748800,c7e4d100,d5a568a0,d6e1ddfc,0) at nfsrv_symlink+0x1212
	  nfssvc_nfsd(d6e1de5c,807c360,d5a568a0,d5a568a0,2) at nfssvc_nfsd+0x502
	  nfssvc(d5a568a0,d6e1df80,4,0,0) at nfssvc+0x643
	  syscall2(2f,2f,2f,0,0) at syscall2+0x1f1
	  Xint0x80_syscall() at Xint0x80_syscall+0x25

	Unfortunately, I've just upgraded to 4.3-STABLE on my master
	machine, and though I have a dump, I don't have a debugging kernel 
	to go along with it. I tried checking out -STABLE for 01/23/01,
	but no luck (I've probably modified the kernel config since then,
	no backup *sigh*).

	However, this machine did have a filesystem fill up on it prior
	to the panic, and the process writing to it over NFS obviously
	didn't notice, and kept trying repeatedly.

	The machine had been up for 46 days without a problem (and without
	any modifications) before this.

Fix: 

Unknown.
How-To-Repeat: 
	Fill up a filesystem and write to it continuously over NFS?
Comment 1 iedowse freebsd_committer freebsd_triage 2001-12-04 16:54:17 UTC 
State Changed
From-To: open->closed


Fixed in -CURRENT by revision 1.109 of nfsserver/nfs_serv.c, will 
be merged into -STABLE within a few days.