Date: Thu, 8 May 1997 13:30:16 +1000 From: Bruce Evans <bde@zeta.org.au> To: current@FreeBSD.ORG, gena@NetVision.net.il Cc: phk@FreeBSD.ORG Subject: Re: Another panic Message-ID: <199705080330.NAA01676@godzilla.zeta.org.au>
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>I reported a panic problem a few days ago (see below). After some investigation >i find out that i have a file with a very long filename (~220 characters). An >attempt to "stat" this file caused the panic (and this is reproducible). >I loaded old kernel and removed it. Anyway, i think it's a bug and it should be >fixed. > >Stopped at _generic_bcopy+0x41: repe movsl (%esi),%es:(%edi) >-------------------trace-------------- >_generic_bcopy(f0797b80,f08f4680,f4145ed4,f06f40d8,f0797b80) [cache_enter] >_ufs_lookup+0xccc It seems to be a classic sign extension bug. nc_nlen has type char, so it is unsuitable for storing name lengths longer than 127. This probably didn't matter until recently because NCHNAMLEN limited the lengths. The casts to (u_int) may have helped hide the problem. Bruce
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