[SSI-devel] SSI-1.1.1 FC2 kernel oops cfs_lookup_revalidate proc_lookup

[Roger T. <pe...@ho...>]

Hi I'm using SSI-1.1.1-FC2 kernel on Fedora Core 2.

I was able to duplicate kernel oops simply by doing the following - of
course you have to have modprobed drbd or started drbd service beforehand.
 Either method below will trigger the oops.  Node2 is a P3 UP machine.

# rmmod drbd
Dec  6 13:17:06 node2 kernel: drbd: module cleanup done.

# cat /proc/drbd
Dec  6 13:17:08 node2 kernel: Unable to handle kernel paging request at
virtual
address d8968010
Dec  6 13:17:08 node2 kernel:  printing eip:
Dec  6 13:17:08 node2 kernel: c01872f1
Dec  6 13:17:08 node2 kernel: *pde = 00000000
Dec  6 13:17:08 node2 kernel: Oops: 0002
Dec  6 13:17:08 node2 kernel: iptable_nat ip_conntrack nfsd iptable_filter
ip_tables microcode ide-cd sr_mod cdrom floppy keybdev mousedev hid input
usb-uhci usbcore 8139too r8169 8390 mii
Dec  6 13:17:08 node2 kernel: CPU:    0
Dec  6 13:17:08 node2 kernel: EIP:    0060:[<c01872f1>]    Not tainted
Dec  6 13:17:08 node2 kernel: EFLAGS: 00010286
Dec  6 13:17:08 node2 kernel:
Dec  6 13:17:08 node2 kernel: EIP is at proc_get_inode [kernel] 0xa1
(2.4.22-1.2199.nptl_ssi_5develsmp)
Dec  6 13:17:08 node2 kernel: eax: d8968000   ebx: d6365800   ecx: 00000001
edx: 00000003
Dec  6 13:17:08 node2 kernel: esi: d64e2e00   edi: d7eddc00   ebp: d3701df8
esp: d3701ddc
Dec  6 13:17:08 node2 kernel: ds: 0068   es: 0068   ss: 0068
Dec  6 13:17:08 node2 kernel: Process cat (pid: 134076, stackpage=d3701000)
Dec  6 13:17:08 node2 kernel: Stack: d6365800 0000128d 00000000 00000000
d64e2e00 d395f6e4 d7edc580 d3701e30
Dec  6 13:17:08 node2 kernel:        c018a6a7 d7eddc00 0000128d d64e2e00
c024ce03 128d2580 00000001 d395f6e0
Dec  6 13:17:08 node2 kernel:        ffffffea 00000000 d7edc580 d395f680
d7edc580 d3701e48 c01874d4 d7edc580
Dec  6 13:17:08 node2 kernel: Call Trace:
Dec  6 13:17:08 node2 kernel: [<c018a6a7>] proc_lookup [kernel] 0xc7
(0xd3701dfc)
Dec  6 13:17:08 node2 kernel: [<c024ce03>] cfs_lookup_revalidate [kernel]
0x223
(0xd3701e0c)
Dec  6 13:17:08 node2 kernel: [<c01874d4>] proc_root_lookup [kernel] 0x24
(0xd3701e34)
Dec  6 13:17:08 node2 kernel: [<c0166f5a>] real_lookup [kernel] 0x19a
(0xd3701e4c)
Dec  6 13:17:08 node2 kernel: [<c0166d41>] cached_lookup [kernel] 0x21
(0xd3701e58)
Dec  6 13:17:08 node2 kernel: [<c016786c>] link_path_walk_it [kernel] 0x5bc
(0xd3701e74)
Dec  6 13:17:08 node2 kernel: [<c0167e1e>] path_walk_it [kernel] 0x2e
(0xd3701eb4)
Dec  6 13:17:08 node2 kernel: [<c0168043>] path_lookup_it [kernel] 0x43
(0xd3701ec8)
Dec  6 13:17:08 node2 kernel: [<c01687db>] open_namei_it [kernel] 0x8b
(0xd3701ee8)
Dec  6 13:17:08 node2 kernel: [<c0158339>] filp_open [kernel] 0x59
(0xd3701f1c)
Dec  6 13:17:08 node2 kernel: [<c0166a53>] getname [kernel] 0x93 (0xd3701f84)
Dec  6 13:17:08 node2 kernel: [<c01587a1>] sys_open [kernel] 0x51
(0xd3701fa4)
Dec  6 13:17:08 node2 kernel: [<c010be37>] system_call [kernel] 0x33
(0xd3701fc0)
Dec  6 13:17:08 node2 kernel:
Dec  6 13:17:08 node2 kernel: Code: f0 ff 40 10 8b 46 24 83 48 14 18 8b 46
18 85
c0 74 06 89 83
---------------------------------------------------

# rmmod drbd
Dec  6 13:27:21 node2 kernel: drbd: module cleanup done.

# /etc/init.d/drbd start
Dec  6 13:27:25 node2 kernel: Unable to handle kernel paging request at
virtual
address d8968010
Dec  6 13:27:25 node2 kernel:  printing eip:
Dec  6 13:27:25 node2 kernel: c01872f1
Dec  6 13:27:25 node2 kernel: *pde = 00000000
Dec  6 13:27:25 node2 kernel: Oops: 0002
Dec  6 13:27:25 node2 kernel: iptable_nat ip_conntrack nfsd iptable_filter
ip_tables microcode ide-cd sr_mod cdrom floppy keybdev mousedev hid input
usb-uhci usbcore 8139too r8169 8390 mii
Dec  6 13:27:25 node2 kernel: CPU:    0
Dec  6 13:27:25 node2 kernel: EIP:    0060:[<c01872f1>]    Not tainted
Dec  6 13:27:25 node2 kernel: EFLAGS: 00010286
Dec  6 13:27:25 node2 kernel:
Dec  6 13:27:25 node2 kernel: EIP is at proc_get_inode [kernel] 0xa1
(2.4.22-1.2199.nptl_ssi_5develsmp)
Dec  6 13:27:25 node2 kernel: eax: d8968000   ebx: d61ec580   ecx: 00000001
edx: 00000003
Dec  6 13:27:25 node2 kernel: esi: d6240f00   edi: d7eddc00   ebp: d38e3e50
esp: d38e3e34
Dec  6 13:27:25 node2 kernel: ds: 0068   es: 0068   ss: 0068
Dec  6 13:27:25 node2 kernel: Process drbd (pid: 133517, stackpage=d38e3000)
Dec  6 13:27:25 node2 kernel: Stack: d61ec580 0000128d 00000000 00000000
d6240f00 d62571e4 d7edc580 d38e3e88
Dec  6 13:27:25 node2 kernel:        c018a6a7 d7eddc00 0000128d d6240f00
c024ce03 128d1580 00000001 d62571e0
Dec  6 13:27:25 node2 kernel:        ffffffea 00000000 d7edc580 d6257180
d7edc580 d38e3ea0 c01874d4 d7edc580
Dec  6 13:27:25 node2 kernel: Call Trace:
Dec  6 13:27:25 node2 kernel: [<c018a6a7>] proc_lookup [kernel] 0xc7
(0xd38e3e54)
Dec  6 13:27:25 node2 kernel: [<c024ce03>] cfs_lookup_revalidate [kernel]
0x223
(0xd38e3e64)
Dec  6 13:27:25 node2 kernel: [<c01874d4>] proc_root_lookup [kernel] 0x24
(0xd38e3e8c)
Dec  6 13:27:25 node2 kernel: [<c0166f5a>] real_lookup [kernel] 0x19a
(0xd38e3ea4)
Dec  6 13:27:25 node2 kernel: [<c0166d41>] cached_lookup [kernel] 0x21
(0xd38e3eb0)
Dec  6 13:27:25 node2 kernel: [<c016786c>] link_path_walk_it [kernel] 0x5bc
(0xd38e3ecc)
Dec  6 13:27:25 node2 kernel: [<c0167e1e>] path_walk_it [kernel] 0x2e
(0xd38e3f0c)
Dec  6 13:27:25 node2 kernel: [<c01684ff>] __user_walk_it [kernel] 0x6f
(0xd38e3f20)
Dec  6 13:27:25 node2 kernel: [<c0162fc7>] sys_stat64 [kernel] 0x37
(0xd38e3f44)
Dec  6 13:27:25 node2 kernel: [<c010be37>] system_call [kernel] 0x33
(0xd38e3fc0)
Dec  6 13:27:25 node2 kernel:
Dec  6 13:27:25 node2 kernel: Code: f0 ff 40 10 8b 46 24 83 48 14 18 8b 46
18 85
c0 74 06 89 83