From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; Linux i686; U) Opera 7.21 [en] Description of problem: Got this on a server running RedHat 9: Unable to handle kernel NULL pointer dereference at virtual address 00000085 printing eip: c017abf9 *pde = 00000000 Oops: 0002 ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables e1000 loop lvm-mod keybdev mousede v hid input ehci-hcd usb-uhci usbcore ext3 jbd raid1 sd_mod scsi_ CPU: 1 EIP: 0060:[<c017abf9>] Not tainted EFLAGS: 00010202 EIP is at proc_delete_inode [kernel] 0x29 (2.4.20-20.9smp) eax: 00000075 ebx: d2d4da80 ecx: 00000020 edx: ddc72000 esi: c017abd0 edi: c46c3800 ebp: ddc73f90 esp: ddc73f44 ds: 0068 es: 0068 ss: 0068 Process chatstats (pid: 327680, stackpage=ddc73000) Stack: c016d600 d2d4da80 c03468c0 c03d5c00 cfca5480 d2d4da80 00000fff c016a39a d2d4da80 c03d5c00 ddc73f90 d2d4da80 c015f9c5 cfca5480 0000000d c015c07e ddc73f90 bfffd4d0 00000fff cfca5480 c2df0f40 c0139c19 0805f000 00001000 Call Trace: [<c016d600>] iput [kernel] 0x150 (0xddc73f44)) [<c016a39a>] dput [kernel] 0xca (0xddc73f60)) [<c015f9c5>] path_release [kernel] 0x15 (0xddc73f74)) [<c015c07e>] sys_readlink [kernel] 0x6e (0xddc73f80)) [<c0139c19>] sys_brk [kernel] 0x109 (0xddc73f98)) [<c01098cf>] system_call [kernel] 0x33 (0xddc73fc0)) Code: f0 ff 48 10 8b 42 24 83 48 14 08 89 54 24 04 e9 f3 fe ff ff The server is a single CPU P4 machine with HyperThreading enabled, two IDE disks in SoftRAID-1, running a heavily threaded java chat application. I have observed an Oops in the same function before (#90156), but this one's traceback does not show the same functions, so I'm not reopening it. I have also experienced some problems which may or may not be related - a week ago, the machine was left in the state where any of the programs related with /proc, like ps or top failed with segfault. Since this was an production server, I couldn't have investigated further, but rebooted. Nothing suspicious was found in the logs. Version-Release number of selected component (if applicable): kernel-smp-2.4.20-20.9 How reproducible: Didn't try Steps to Reproduce: 1. 2. 3. Additional info:
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