Date: Fri, 13 Nov 1998 15:16:25 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: freebsd-current@FreeBSD.ORG Subject: nfs_rename() panic Message-ID: <13900.36889.417269.577335@grasshopper.cs.duke.edu>
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I'm getting a 100% reproducible panic in nfs_rename. This is on a system with sources cvsupped this morning about 10am EST. NFS is compiled in statically, not an LKM. The new access caching stuff is off. This panic does not happen in a kernel built from 1 week old sources. The panic happens when trn renames .newsrc in a filesystem mounted via NFSv3/tcp from a Solaris 2.5 server. I've appended a partial stack trace. The problem seems to be that fvp->v_data is somehow becoming NULL. Cheers, Drew ------------------------------------------------------------------------------ Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin Duke University Email: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 Fatal trap 12: page fault while in kernel mode fault virtual address = 0x7c fault code = supervisor read, page not present instruction pointer = 0x8:0xf01b0384 stack pointer = 0x10:0xf65f6e78 frame pointer = 0x10:0xf65f6e90 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 366 (trn) interrupt mask = syncing disks... 8 8 3 done <...> #8 0xf01f021c in trap_pfault (frame=0xf65f6e3c, usermode=0) at ../../i386/i386/trap.c:772 #9 0xf01efe6f in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = -161754304, tf_esi = 0, tf_ebp = -161517936, tf_isp = -161517980, tf_ebx = 0, tf_edx = -161475840, tf_ecx = -260659200, tf_eax = -161452960, tf_trapno = 12, tf_err = 0, tf_eip = -266665084, tf_cs = 8, tf_eflags = 66199, tf_esp = -161754304, tf_ss = -161517836}) at ../../i386/i386/trap.c:396 #10 0xf01b0384 in nfs_rename (ap=0xf65f6eb0) at ../../nfs/nfs_vnops.c:1676 #11 0xf016b436 in rename (p=0xf657b340, uap=0xf65f6f94) at vnode_if.h:583 (kgdb) frame 10 #10 0xf01b0384 in nfs_rename (ap=0xf65f6eb0) at ../../nfs/nfs_vnops.c:1676 1676 VTONFS(fvp)->n_modestamp = 0; (kgdb) p fvp->v_data $1 = (void *) 0x0 (kgdb) p fvp $2 = (struct vnode *) 0xf6601300 (kgdb) p &fvp->v_data $3 = (void **) 0xf660137c To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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