I wonder if the allocked entry of the sysname state isn't getting set back to zero somewhere.
-- Nathan ------------------------------------------------------------ Nathan Neulinger EMail: [EMAIL PROTECTED] University of Missouri - Rolla Phone: (573) 341-4841 Computing Services Fax: (573) 341-4216 > -----Original Message----- > From: Derek Atkins [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 14, 2002 12:44 PM > To: Neulinger, Nathan > Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]; Ted Anderson > Subject: Re: [OpenAFS-devel] problems with current cvs on > linux - oops's, possibly related to 1.32-1.34 changes in > osi_vnodeops.c > > > In a closer look there is DEFINITELY a double-free going on. I just > caught the following while breakpoints are set in both > osi_AllocLargeSpace() and osi_FreeLargeSpace(): > > Breakpoint 2, osi_FreeLargeSpace (adata=0xc77a9000) > at ../afs/afs_osi_alloc.c:71 > 71 AFS_STATCNT(osi_FreeLargeSpace); > (gdb) > Continuing. > > Breakpoint 2, osi_FreeLargeSpace (adata=0xc4170000) > at ../afs/afs_osi_alloc.c:71 > 71 AFS_STATCNT(osi_FreeLargeSpace); > (gdb) > Continuing. > > Breakpoint 2, osi_FreeLargeSpace (adata=0xc4170000) > at ../afs/afs_osi_alloc.c:71 > 71 AFS_STATCNT(osi_FreeLargeSpace); > > > Notice that it's trying to free 0xc4170000 twice? This last free() > is coming from: > > (gdb) where > #0 osi_FreeLargeSpace (adata=0xc4170000) at ../afs/afs_osi_alloc.c:71 > #1 0xc8896a5d in afs_linux_dentry_revalidate (dp=0xc3823260, flags=0) > at ../afs/osi_vnodeops.c:847 > #2 0xc01420fd in cached_lookup (parent=0xc662d7c0, > name=0xc5349f98, flags=0) > at namei.c:249 > > Unfortunately I didn't get a backtrace on the pentultimate > free(). I'll > keep working on it. But this is definitely the cause of the > problem -- > the same packet is getting onto the freelist twice. > > -derek > > "Neulinger, Nathan" <[EMAIL PROTECTED]> writes: > > > Derek was able to trace down the reason for the fault witn kgdb. I'd > > guess it likely has something to do with these recent changes to > > osi_vnodeops.c. I'll take a closer look, but I'm not really familiar > > with what's going on in the code here. > > > > -- Nathan > > > > ------------------------------------------------------------ > > Nathan Neulinger EMail: [EMAIL PROTECTED] > > University of Missouri - Rolla Phone: (573) 341-4841 > > Computing Services Fax: (573) 341-4216 > > > > > > -----Original Message----- > > From: Neulinger, Nathan > > Sent: Thursday, March 14, 2002 12:29 PM > > To: 'Derek Atkins' > > Subject: RE: Have you had a succesful build+use with > current openafs? > > > > > > FYI Looks like it was probably introduced in 1.33 of osi_vnodeops.c. > > There were a bunch of changes for revalidate_dnode. > > > > -- Nathan > > > > ------------------------------------------------------------ > > Nathan Neulinger EMail: [EMAIL PROTECTED] > > University of Missouri - Rolla Phone: (573) 341-4841 > > Computing Services Fax: (573) 341-4216 > > > > > > > -----Original Message----- > > > From: Derek Atkins [mailto:[EMAIL PROTECTED]] > > > Sent: Thursday, March 14, 2002 12:23 PM > > > To: Neulinger, Nathan > > > Subject: Re: Have you had a succesful build+use with > current openafs? > > > > > > > > > Yep. kgdb.sf.net. Requires two systems with a "serial" line > > > between them. In my case I'm using vmware :) > > > > > > We should definitely report this to openafs-devel! I'll look a > > > bit more but I've only got about 30 minutes more I can sink into > > > this today. > > > > > > -derek > > > > > > "Neulinger, Nathan" <[EMAIL PROTECTED]> writes: > > > > > > > Goody! :) > > > > > > > > Thanks. That's reassuring, nothing like having a bug > like this screw > > > > with your head when you think that you've made a whole > > > bunch of changes > > > > that should not have any affect on code behavior. > > > > > > > > Are you using the kernel debugger patches? I definately > > > should dig into > > > > that some time. > > > > > > > > -- Nathan > > > > > > > > ------------------------------------------------------------ > > > > Nathan Neulinger EMail: [EMAIL PROTECTED] > > > > University of Missouri - Rolla Phone: (573) 341-4841 > > > > Computing Services Fax: (573) 341-4216 > > > > > > > > > > > > > -----Original Message----- > > > > > From: Derek Atkins [mailto:[EMAIL PROTECTED]] > > > > > Sent: Thursday, March 14, 2002 12:17 PM > > > > > To: Neulinger, Nathan > > > > > Subject: Re: Have you had a succesful build+use with > > > current openafs? > > > > > > > > > > > > > > > Here is the stack trace of what's going on. I have > no idea why > > > > > freePacketList is being set to '1'. I'll keep > looking, but this > > > > > is clearly not "just you" :) > > > > > > > > > > -derek > > > > > > > > > > Program received signal SIGSEGV, Segmentation fault. > > > > > 0xc8863031 in osi_AllocLargeSpace (size=720) at > > > > > ../afs/afs_osi_alloc.c:201 > > > > > 201 if ( tp ) freePacketList = tp->next; > > > > > (gdb) where > > > > > #0 0xc8863031 in osi_AllocLargeSpace (size=720) at > > > > > ../afs/afs_osi_alloc.c:201 > > > > > #1 0xc8872a91 in afs_DoBulkStat (adp=0xc8936658, > dirCookie=480, > > > > > areqp=0xc5347e68) at ../afs/afs_vnop_lookup.c:426 > > > > > #2 0xc8874c25 in afs_lookup (adp=0xc8936658, > > > aname=0xc13ded80 "CVS", > > > > > avcp=0xc5347ec4, acred=0xc412a000) at > > > > > ../afs/afs_vnop_lookup.c:1190 > > > > > #3 0xc8896c14 in afs_linux_lookup (dip=0xc8936658, > dp=0xc13ded20) > > > > > at ../afs/osi_vnodeops.c:993 > > > > > #4 0xc0142175 in real_lookup (parent=0xc79210c0, > > > > > name=0xc5347f4c, flags=0) > > > > > at namei.c:284 > > > > > #5 0xc0142936 in path_walk (name=0xc76bf011 "", > > > > > nd=0xc5347f98) at namei.c:564 > > > > > #6 0xc014313a in __user_walk (name=0xbfffb820 > > > > > "../../src/doc/CVS", flags=9, > > > > > nd=0xc5347f98) at namei.c:805 > > > > > #7 0xc013fcf6 in sys_stat64 (filename=0xbfffb820 > > > > > "../../src/doc/CVS", > > > > > statbuf=0xbfff96b0, flags=1075171668) at stat.c:337 > > > > > #8 0xc0106fcb in system_call () at af_packet.c:1879 > > > > > (gdb) p tp > > > > > $1 = (struct osi_packet *) 0x1 > > > > > (gdb) p freePacketList > > > > > $2 = (struct osi_packet *) 0x1 > > > > > > > > > > -- > > > > > Derek Atkins, SB '93 MIT EE, SM '95 MIT Media > Laboratory > > > > > Member, MIT Student Information Processing > Board (SIPB) > > > > > URL: http://web.mit.edu/warlord/ PP-ASEL-IA > N1NWH > > > > > [EMAIL PROTECTED] PGP key > available > > > > > > > > > > > -- > > > Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory > > > Member, MIT Student Information Processing Board (SIPB) > > > URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH > > > [EMAIL PROTECTED] PGP key available > > > > > _______________________________________________ > > OpenAFS-devel mailing list > > [EMAIL PROTECTED] > > https://lists.openafs.org/mailman/listinfo/openafs-devel > > -- > Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory > Member, MIT Student Information Processing Board (SIPB) > URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH > [EMAIL PROTECTED] PGP key available > _______________________________________________ OpenAFS-devel mailing list [EMAIL PROTECTED] https://lists.openafs.org/mailman/listinfo/openafs-devel
