Hello, I've subscribed to the list for quite a while, and I sincerely hope this is the correct place to report this particular problem. If not, I apologize and ask that someone point me in the correct direction. Since I would rather include too much information than too little, I'll include a brief description of the hardware, the distro, and the problem, followed by a printout of the oops. The machine: SMP dual PII/400 Supermicro P6DBU 256MB PC-100 in 4 sticks of 64MB ea. Adaptec 2940UW TNT2 Ultra 32MB AGP (2) Intel PRO/100 PCI NICs PCI es1370 sound LinTV card (bttv) 300w Antec PSU APC 500 PS backup Mandrake 7.1, expert install, chose everything, and went with ReiserFS (love those speedy boots). This box ran very well for weeks. The box itself is hand-built, and has run well for a year or so under various Linux distros. When 2.2.17 was released, I immediately went and pulled the 2.2.17 kernel, and the 3.5.24 reiserfs patch. Patched, config'd, built. Started having terrible lockups. Closing Netscape would do it almost every time. I removed all Netscape from the machine. Mozilla (latest nightly) would crash it on opening up a child window. I started having massive corruption of data streams. For instance, when opening up *.tar.gz files, or checking RAR archives, etc. md5 would come up with inconsistent results (!). Files corrupted (but only ones that had been "touched"/manipulated. Samba would happily take down the machine. All of these are hard locks, requiring manual reboots. Rebuilt the kernel several times. Pulled fresh source, fresh patch (now at 3.5.26), reapplied, copied old .config over and did 'make oldconfig', and on others just simply redid the config from scratch. All of these in just about every way there is to arrange 9 books on a shelf. Chose modules, chose built-in, on and on ad nauseum. I surely did not want to post to this list without at least doing my homework. I have other mission-critical boxen that I have held off of the 2.2.17 upgrade until I'm comfortable that this is just a problem specific to this machine or my stupidity. This is the only SMP box I have, the others are UP. The following was taken from my /var/messages log. I appreciate any/all feedback, because this is just quite simply driving me crazy. Most un-Linuxish behavior. :( >Oct 2 11:22:58 omega kernel: <3>kmem_free: Bad obj addr (objp=ccc58280, >name=size-32) >Oct 2 11:22:58 omega kernel: <1>Unable to handle kernel NULL pointer dereference at >virtual address 00000000 >Oct 2 11:22:58 omega kernel: <1>current->tss.cr3 = 0f533000, %%cr3 = 0f533000 >Oct 2 11:22:58 omega kernel: <1>*pde = 00000000 >Oct 2 11:22:58 omega kernel: <4>Oops: 0002 >Oct 2 11:22:58 omega kernel: <4>CPU: 1 >Oct 2 11:22:58 omega kernel: <4>EIP: 0010:[kfree+410/460] >Oct 2 11:22:58 omega kernel: <4>EFLAGS: 00010202 >Oct 2 11:22:58 omega kernel: <4>eax: 00000039 ebx: cffff080 ecx: 0000004a edx: >00000002 >Oct 2 11:22:58 omega kernel: <4>esi: ccc58280 edi: 00000202 ebp: ffffffff esp: >ca955ecc >Oct 2 11:22:58 omega kernel: <4>ds: 0018 es: 0018 ss: 0018 >Oct 2 11:22:58 omega kernel: <4>Process smbd (pid: 624, process nr: 31, >stackpage=ca955000) >Oct 2 11:22:58 omega kernel: <4>Stack: 00000000 ffffffff ccd58b00 ca682860 a54eebaa >00000011 cc29b404 ca955f68 >Oct 2 11:22:58 omega kernel: <4> 00000040 c0136071 ccc58280 ca682860 ca71001a >00000000 ccd58b00 ca58c8a0 >Oct 2 11:22:58 omega kernel: <4> fffffffe ca710000 08124d60 bffff75c 00000000 >ffffffff ca8e4e40 ca955f78 >Oct 2 11:22:58 omega kernel: <4>Call Trace: [prune_dcache+229/312] >[shrink_dcache_parent+23/48] [lookup_dentry+365/504] [vfs_rmdir+254/308] >[sys_rmdir+201/320] [common_interrupt+24/32] [system_call+52/64] >Oct 2 11:22:58 omega kernel: <4> [stext+43/164] >Oct 2 11:22:59 omega kernel: <4>Code: c7 05 00 00 00 00 00 00 00 00 eb 1d 89 f6 83 >c4 f8 56 68 82 -- Brad Felmey - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/