2.4.0-test3-pre1 oops in shm_init

[Keith Owens]

2.4.0-test3-pre1 oops during startup.  The "head" parameter passed to
find_inode contains all -1 entries.  kdb log

Memory: 898472k/917504k available (1837k kernel code, 18644k reserved, 151k data, 212k init, 0k highmem)
Dentry-cache hash table entries: 131072 (order: 8, 1048576 bytes)
Buffer-cache hash table entries: 65536 (order: 6, 262144 bytes)
Page-cache hash table entries: 262144 (order: 8, 1048576 bytes)
kmem_create: Poisoning requested, but con given - bdev_cache
Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
kmem_create: Poisoning requested, but con given - inode_cache

Entering kdb (0xc02f2000) on processor 0 Panic: general protection fault
due to panic @ 0xc014c5a4
eax = 0xf7e00000 ebx = 0xffffffff ecx = 0x00000020 edx = 0xc1fdfc00 
esi = 0xffffffff edi = 0x00000000 esp = 0xc02f3f20 eip = 0xc014c5a4 
ebp = 0xf7e72e78  ss = 0x00000018  cs = 0x00000010 eflags = 0x00010207 
 ds = 0xc0120018  es = 0x00000018 origeax = 0xffffffff &regs = 0xc02f3eec
[0]kdb> bt
    EBP       EIP         Function(args)
0xf7e72e78 0xc014c5a4 find_inode+0x44 (0xc1fdfc00, 0x8000, 0xf7e72e78, 0x0, 0x0)
           0xc014c9ad iget4+0x59 (0xc1fdfc00, 0x8000, 0x0, 0x0, 0xc1fdfc00)
           0xc016513f shm_read_super+0x6f (0xc1fdfc00, 0x0, 0x0)
           0xc013ba09 read_super+0x211 (0x1, 0x0, 0xc02dc660, 0x0, 0x0)
           0xc013c076 kern_mount+0x2a (0xc02dc660, 0xc02dc660, 0xc0336100, 0x1)
           0xc02fe9f0 shm_init+0x20
           0xc02fe86f ipc_init+0xf (0x38000, 0x38000, 0x38000, 0x38000, 0x38000)
           0xc02f4cd3 start_kernel+0x127

[0]kdb> id 0xc014c5a4
0xc014c5a4 find_inode+0x44:   movl   (%esi),%esi                                
0xc014c5a6 find_inode+0x46:   xorl   %ebx,%ebx
0xc014c5a8 find_inode+0x48:   cmpl   %ebp,%esi
0xc014c5aa find_inode+0x4a:   jne    0xc014c575 find_inode+0x15
0xc014c5ac find_inode+0x4c:   movl   %ebx,%eax
0xc014c5ae find_inode+0x4e:   popl   %ebx
0xc014c5af find_inode+0x4f:   popl   %esi
0xc014c5b0 find_inode+0x50:   popl   %edi
0xc014c5b1 find_inode+0x51:   popl   %ebp
0xc014c5b2 find_inode+0x52:   ret    

[0]kdb> mds 0xf7e72e78
0xf7e72e78 ffffffff  
0xf7e72e7c ffffffff  
0xf7e72e80 ffffffff  
0xf7e72e84 ffffffff  
0xf7e72e88 ffffffff  
0xf7e72e8c ffffffff  
0xf7e72e90 ffffffff  
0xf7e72e94 ffffffff  

0xc014c5a4 find_inode+0x44: movl (%esi),%esi
is the code for tmp = tmp->next;

Compiling machine

-- Versions installed: (if some fields are empty or look
-- unusual then possibly you have very old versions)
Linux sherman.melbourne.sgi.com 2.2.15-3SGI_31smp-bigmem #1 SMP Sat May 20 01:19:32 EDT 2000 i686 unknown
Kernel modules         2.3.11
Gnu C                  egcs-2.91.66
Binutils               2.9.5.0.22
Linux C Library        2.1.3
Dynamic linker         ldd (GNU libc) 2.1.3
Procps                 2.0.6
Mount                  2.10f
Net-tools              1.54
Console-tools          0.3.3
Sh-utils               2.0

Running machine

Linux version 2.4.0-test3 ([e-mail]) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 SMP Tue Jun 27 12:13:01 EST 2000

.config

CONFIG_X86=y
CONFIG_ISA=y
CONFIG_UID16=y
CONFIG_EXPERIMENTAL=y
CONFIG_M686FXSR=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_L1_CACHE_BYTES=32
CONFIG_X86_TSC=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_PGE=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_FXSR=y
CONFIG_X86_XMM=y
CONFIG_NOHIGHMEM=y
CONFIG_MTRR=y
CONFIG_SMP=y
CONFIG_MODULES=y
CONFIG_NET=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_NAMES=y
CONFIG_SYSVIPC=y
CONFIG_SYSCTL=y
CONFIG_KCORE_ELF=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_LOOP=m
CONFIG_PACKET=m
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_ALIAS=y
CONFIG_SYN_COOKIES=y
CONFIG_SKB_LARGE=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_SD_EXTRA_DEVS=40
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_SR_EXTRA_DEVS=2
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=8
CONFIG_AIC7XXX_PROC_STATS=y
CONFIG_AIC7XXX_RESET_DELAY=5
CONFIG_SCSI_NCR53C8XX=y
CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS=4
CONFIG_SCSI_NCR53C8XX_MAX_TAGS=32
CONFIG_SCSI_NCR53C8XX_SYNC=40
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_PCI=y
CONFIG_EEPRO100=m
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_SERIAL_CONSOLE=y
CONFIG_SERIAL_EXTENDED=y
CONFIG_SERIAL_SHARE_IRQ=y
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_WATCHDOG=y
CONFIG_SOFT_WATCHDOG=y
CONFIG_AUTOFS_FS=m
CONFIG_AUTOFS4_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_PROC_FS=y
CONFIG_DEVFS_FS=y
CONFIG_DEVPTS_FS=y
CONFIG_EXT2_FS=y
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFSD=m
CONFIG_NFSD_V3=y
CONFIG_SUNRPC=m
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_SMB_FS=m
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_VGA_CONSOLE=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_KDB=y
CONFIG_KALLSYMS=y