This may be of interest -

kernel: 2.5.64-mm4

Linux distro: Red Hat 8.0 + updates

Hardware:
Celeron 1.2 Ghz on genuine Intel Motherboard, 512 MB RAM

Just recompiled 2.5.64-mm4 with full debugging
and saw a slab error right after bringing up the
ethernet interfaces -

Full kernel log attached, but the meat of it is here:

Mar  9 21:42:54 jyro kernel: Slab corruption: start=dfc15964, 
expend=dfc159e3, problemat=dfc1599c
Mar  9 21:42:54 jyro kernel: Last user: [<00000000>](0x0)
Mar  9 21:42:54 jyro kernel: Data: 
........................................................62......................................................................A5 

Mar  9 21:42:54 jyro kernel: Next: 71 F0 2C .00 00 00 00 71 F0 2C 
.....................
Mar  9 21:42:54 jyro kernel: slab error in check_poison_obj(): cache 
`size-128':
 object was modified after freeing
Mar  9 21:42:54 jyro kernel: Call Trace:
Mar  9 21:42:54 jyro kernel:  [<c01481bb>] check_poison_obj+0x15b/0x1b0
Mar  9 21:42:54 jyro kernel:  [<c014a1b9>] kmalloc+0x169/0x1c0
Mar  9 21:42:54 jyro kernel:  [<c039e671>] packet_create+0xd1/0x220
Mar  9 21:42:54 jyro kernel:  [<c039e671>] packet_create+0xd1/0x220
Mar  9 21:42:54 jyro kernel:  [<c0330f15>] sock_create+0xd5/0x1c0
Mar  9 21:42:54 jyro kernel:  [<c0388d26>] inet_ioctl+0x106/0x120
Mar  9 21:42:54 jyro kernel:  [<c0331029>] sys_socket+0x29/0x60
Mar  9 21:42:54 jyro kernel:  [<c0331f52>] sys_socketcall+0x72/0x270
Mar  9 21:42:54 jyro kernel:  [<c0180e2e>] sys_ioctl+0x18e/0x3e0
Mar  9 21:42:54 jyro kernel:  [<c010a403>] syscall_call+0x7/0xb