Kernel panic in shrink_cache/ __remove_inode_page / refile_inode on 2.4.22-1.2188.nptlsmp and test 2.4.22-1.2190.nptlsmp

[Aleksander Adamowski]

Hi!

Anybody else seeing frequent kernel panics in refile_inode (called from 
__remove_inode_page, called from shrink_cache) on 2.4.22-1.2188.nptlsmp?

I've filed a bug report in Bugzilla, if you experience similar panics 
you could help tracking it down:
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=123332

There's also a bug with exactly the same symptoms which the Redhat guys 
claim to have fixed in 2.4.22-1.2190 test kernel update, but in my case 
the panice still occur.

The text of panic usually looks like this (the top of call trace look 
always teh same, down to the function try_to_free_pages_zone):

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c01691ae
*pde = 0e723067
*pte = 00000000
Oops: 0002
e100 iptable_mangle ipt_REJECT ipt_multiport ipt_state ip_conntrack iptable_filter ip_tables floppy sg microcode keybdev mousedev
hid input usb-uhci usbcore e
CPU:    2
EIP:    0060:[<c01691ae>]    Not tainted
EFLAGS: 00010246

EIP is at refile_inode [kernel] 0x4e (2.4.22-1.2190.nptlsmp)
eax: 00000000   ebx: e28fb900   ecx: 00000000   edx: e28fb908
esi: c0376028   edi: c0374fd8   ebp: 0000772e   esp: c3193de0
ds: 0068   es: 0068   ss: 0068
Process spamd (pid: 31686, stackpage=c3193000)
Stack: c19187a0 e20fb9c4 c013c642 e28fb900 c19187a0 00000000 c19187a0 c01461ba
       c19187a0 000001d2 c3192000 000005c3 000001d2 00000012 0000001d 000001d2
       c0374fd8 c0374fd8 c01464aa c3193e4c 000001d2 0000003c 00000020 c0146522
Call Trace:   [<c013c642>] __remove_inode_page [kernel] 0x82 (0x3c193de8)
[<c01461ba>] shrink_cache [kernel] 0x30a (0xc3193dfc)
[<c01464aa>] shrink_caches [kernel] 0x4a (0xc3193e28)
[<c0146522>] try_to_free_pages_zone [kernel] 0x62 (0xc3193e3c)
[<c0147102>] balance_classzone [kernel] 0x52 (0xc3193e60)
[<c0147438>] __alloc_pages [kernel] 0x188 (0xc3193e7c)
[<c010e968>] call_do_IRQ [kernel] 0x5 (0xc3193e88)
[<c0139b5f>] do_wp_page [kernel] 0x6f (0xc3193ebc)
[<c013a666>] handle_mm_fault [kernel] 0x106 (0xc3193ee0)
[<c011c94c>] do_page_fault [kernel] 0x14c (0xc3193f0c)
[<c011e9c0>] scheduler_tick [kernel] 0x120 (0xc3193f28)
[<c0107b3f>] __switch_to [kernel] 0x16f (0xc3193f44)
[<c011ed8f>] schedule [kernel] 0x7f (0xc3193f68)
[<c012e42e>] update_process_times [kernel] 0x3e (0xc3193f84)
[<c011c800>] do_page_fault [kernel] 0x0 (0xc3193fb0)
[<c0109c18>] error_code [kernel] 0x34 (0xc3193fb8)

Code: 89 01 c7 43 08 00 00 00 00 89 48 04 8b 06 89 50 04 89 43 08