> > linux:/home/adil # crash /boot/System.map-2.6.32.12-crash-crash > /boot/vmlinuz-2.6.32.12-crash-crash > > crash 5.0.1 > Copyright (C) 2002-2010 Red Hat, Inc. > Copyright (C) 2004, 2005, 2006 IBM Corporation > Copyright (C) 1999-2006 Hewlett-Packard Co > Copyright (C) 2005, 2006 Fujitsu Limited > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. > Copyright (C) 2005 NEC Corporation > Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. > Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. > This program is free software, covered by the GNU General Public License, > and you are welcome to change it and/or distribute copies of it under > certain conditions. Enter "help copying" to see the conditions. > This program has absolutely no warranty. Enter "help warranty" for details. > > crash: /boot/vmlinuz-2.6.32.12-crash-crash: not a supported file format > > Usage: > crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile] > > Adil, If you have a RHEL 6.1 then kdump installation and setup is a piece of cake, Luckily I have RHEL 6.1 on my machine and had setup kdump by following the instructions in the link below: http://people.redhat.com/anderson/crash_whitepaper/ To use crash utility for analyzing kernel crashes here's a sample invocation of this command on my machine. [root@rhel 127.0.0.1-2011-11-24-12:57:47]# cat /etc/issue Red Hat Enterprise Linux Server release 6.1 (Santiago) Kernel \r on an \m [root@rhel 127.0.0.1-2011-11-24-12:57:47]# rpm -qa|grep -i debug kernel-debuginfo-2.6.32-131.0.15.el6.x86_64 kernel-debuginfo-common-x86_64-2.6.32-131.0.15.el6.x86_64 [root@rhel 127.0.0.1-2011-11-24-12:57:47]# pwd /var/crash/127.0.0.1-2011-11-24-12:57:47 [root@rhel 127.0.0.1-2011-11-24-12:57:47]# ls vmcore [root@lancer-evt03 127.0.0.1-2011-11-24-12:57:47]# crash -s /usr/lib/debug/lib/modules/2.6.32-131.0.15.el6.x86_64/vmlinux vmcore crash: page excluded: kernel virtual address: ffffffffffffffff type: "possible" WARNING: cannot read cpu_possible_map crash: page excluded: kernel virtual address: ffffffffffffffff type: "present" WARNING: cannot read cpu_present_map crash: page excluded: kernel virtual address: ffffffffffffffff type: "online" WARNING: cannot read cpu_online_map WARNING: kernels compiled by different gcc versions: /usr/lib/debug/lib/modules/2.6.32-131.0.15.el6.x86_64/vmlinux: 4.4.5 vmcore kernel: 4.4.4 crash: page excluded: kernel virtual address: ffffffffffffffff type: "cpu_present_map" crash: page excluded: kernel virtual address: ffffffffffffffff type: "cpu_present_map" crash> log Pid: 10679, comm: bash Tainted: P W ---------------- T 2.6.32-131.0.15.el6.x86_64 #1 S5000PAL RIP: 0010:[<ffffffff8115a1d4>] [<ffffffff8115a1d4>] cache_alloc_refill+0x1e4/0x240 RSP: 0018:ffff880157997bd8 EFLAGS: 00010046 RAX: 0000000000000009 RBX: ffff88015fc10080 RCX: 000000000000001e RDX: ffff8801586ef000 RSI: ffff88015fc224c0 RDI: ffff880157fa9000 RBP: ffff880157997c38 R08: ffff8801586ef000 R09: 0000000070616d5f R10: 0000000013131313 R11: 0000000000000000 R12: ffff88015ac54400 R13: ffff88015fc224c0 R14: 0000000000000009 R15: ffff880157fa9000 FS: 00007f31a13ab700(0000) GS:ffff880028240000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001f084a8 CR3: 00000001559d5000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process bash (pid: 10679, threadinfo ffff880157996000, task ffff8801575c0a80) Stack: ffff880158ef2cc0 0000000058ef2cc0 ffff88015fc22500 000492d0a028816e <0> ffff88015fc224e0 ffff88015fc224d0 0000000000000020 0000000000000044 <0> 0000000000000010 00000000000080d0 ffff88015fc10080 ffffffffa027fd07 Call Trace: [<ffffffffa027fd07>] ? ext4_htree_store_dirent+0x37/0x140 [ext4] [<ffffffff8115b079>] __kmalloc+0x1a9/0x220 [<ffffffffa027fd07>] ext4_htree_store_dirent+0x37/0x140 [ext4] [<ffffffffa028d338>] htree_dirblock_to_tree+0x128/0x190 [ext4] [<ffffffffa028ddaa>] ext4_htree_fill_tree+0x16a/0x260 [ext4] [<ffffffffa027fb75>] ext4_readdir+0x4f5/0x650 [ext4] [<ffffffff81185f90>] ? filldir+0x0/0xe0 [<ffffffff81211d3b>] ? selinux_file_permission+0xfb/0x150 [<ffffffff81185f90>] ? filldir+0x0/0xe0 [<ffffffff81186210>] vfs_readdir+0xc0/0xe0 [<ffffffff81186399>] sys_getdents+0x89/0xf0 [<ffffffff8100b172>] system_call_fastpath+0x16/0x1b Code: 89 ff e8 a0 8c 11 00 eb 99 66 0f 1f 44 00 00 41 c7 45 60 01 00 00 00 4d 8b 7d 20 4c 39 7d c0 0f 85 f2 fe ff ff eb 84 0f 0b eb fe <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 eb f4 8b 55 ac 8b 75 bc 31 RIP [<ffffffff8115a1d4>] cache_alloc_refill+0x1e4/0x240 RSP <ffff880157997bd8> crash> This crash was invoked by a module to delibrately cause kernel crash. -Amit _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
