Ooops in 2.6.7-rc1

[Benjamin Herrenschmidt]

My laptop just got that (bk clone updated yesterday). 2.6.6-rc1 was stable over
3 weeks on this same box. It's a NULL dereference (DAR = 0)

May 30 11:35:27 gaston kernel: Oops: kernel access of bad area, sig: 11 [#1]
May 30 11:35:27 gaston kernel: NIP: C0046FBC LR: C00470D0 SP: ED6BFCA0 REGS: ed6bfbf0 TRAP: 0300    Not tainted
May 30 11:35:27 gaston kernel: MSR: 00001032 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11
May 30 11:35:27 gaston kernel: DAR: 00000000, DSISR: 42000000
May 30 11:35:27 gaston kernel: TASK = ef5fa030[1589] 'XFree86' THREAD: ed6be000Last syscall: 3
May 30 11:35:27 gaston kernel: GPR00: 0000000C ED6BFCA0 EF5FA030 C060F9A0 EFB6E77C E949DE5C E949DE74 00200200
May 30 11:35:27 gaston kernel: GPR08: 00100100 D3F40A9C 00000000 C8FDA000 ED6BFEAC 101E2FE8 101E0000 101E0000
May 30 11:35:27 gaston kernel: GPR16: 00000001 00000001 FFFFFFA1 DEFD4620 00000000 00000000 CDE3B3A4 00000040
May 30 11:35:27 gaston kernel: GPR24: CDE3B494 C060F9BC C0390000 EFFF70C0 0000000C C060F9AC 00000003 C060F9A0
May 30 11:35:27 gaston kernel: NIP [c0046fbc] free_block+0x78/0x134
May 30 11:35:27 gaston kernel: LR [c00470d0] cache_flusharray+0x58/0xb0
May 30 11:35:27 gaston kernel: Call trace:
May 30 11:35:27 gaston kernel:  [c00470d0] cache_flusharray+0x58/0xb0
May 30 11:35:27 gaston kernel:  [c0047628] kfree+0x88/0xa4
May 30 11:35:27 gaston kernel:  [c01e78e0] skb_release_data+0xd4/0xfc
May 30 11:35:27 gaston kernel:  [c01e7920] kfree_skbmem+0x18/0x3c
May 30 11:35:27 gaston kernel:  [c01e79f8] __kfree_skb+0xb4/0x12c
May 30 11:35:27 gaston kernel:  [c023a2e4] unix_stream_recvmsg+0x218/0x48c
May 30 11:35:27 gaston kernel:  [c01e3da4] sock_aio_read+0xcc/0xe0
May 30 11:35:27 gaston kernel:  [c005cad4] do_sync_read+0x78/0xbc
May 30 11:35:27 gaston kernel:  [c005cc28] vfs_read+0x110/0x128
May 30 11:35:27 gaston kernel:  [c005ce64] sys_read+0x40/0x74
May 30 11:35:27 gaston kernel:  [c0007c90] ret_from_syscall+0x0/0x4c

I can look more in details later if it's not an already known problem

Ben.


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