| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 3 Jan 2009 00:23:03 +0530 From: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: Eric Sesterhenn <snakebyte@....de>, linux-kernel@...r.kernel.org, josh@...edesktop.org, dipankar@...ibm.com Subject: Re: [BUG] NULL pointer deref with rcutorture * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> [2009-01-02 09:58:53]: > On Fri, Jan 02, 2009 at 12:18:19PM +0100, Eric Sesterhenn wrote: > > Hi, > > > > modprobing rcutorture and removing it again gives me the following oops: > > This looks similar to something that Kamalesh ran into a few weeks ago. > > Kamalesh, did the fixes for that make it to 2.6.28? > > Thanx, Paul > Hi Paul, The fix was available in linux-next from Dec 23 2008 (commit 392ddc32982a5c661dd90dd49a3cb37f1c68b782 'bio: add support for inlining a number of bio_vecs inside the bio') and it has be pushed for merger in 2.6.29. > > [ 122.873859] rcu-torture:--- Start of test: nreaders=2 nfakewriters=4 stat_interval=0 verbose=0 test_no_idle_hz=0 shuffle_interval=3 stutter=5 irqreader=1 > > [ 162.987060] BUG: unable to handle kernel NULL pointer dereference at 00000000 > > [ 162.987194] IP: [<00000000>] 0x0 > > [ 162.987268] *pde = 00000000 > > [ 162.987339] Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC > > [ 162.987499] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/resource > > [ 162.987534] Modules linked in: [last unloaded: rcutorture] > > [ 162.987667] > > [ 162.987699] Pid: 5091, comm: udevd Tainted: G W (2.6.28-04980-gb58602a-dirty #154) System Name > > [ 162.987732] EIP: 0060:[<00000000>] EFLAGS: 00010246 CPU: 0 > > [ 162.987761] EIP is at 0x0 > > [ 162.987849] EAX: d0afcbf0 EBX: 00000000 ECX: c0160f5a EDX: 00000006 > > [ 162.987880] ESI: d0afcbf0 EDI: 0000001c EBP: c0b01fe0 ESP: c0b01fd4 > > [ 162.987910] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 > > [ 162.987941] Process udevd (pid: 5091, ti=c0b01000 task=c8cc4100 task.ti=c8d20000) > > [ 162.988027] Stack: > > [ 162.988027] c0160f61 00000200 00000001 c0b01ff8 c012a723 0000000a c8d20e4c 00000046 > > [ 162.988027] c012a6b4 c8d20e5c c01042ce > > [ 162.988027] Call Trace: > > [ 162.988027] [<c0160f61>] ? rcu_process_callbacks+0x65/0x79 > > [ 162.988027] [<c012a723>] ? __do_softirq+0x6f/0xf6 > > [ 162.988027] [<c012a6b4>] ? __do_softirq+0x0/0xf6 > > [ 162.988027] <IRQ> <0> [<c012a631>] ? irq_exit+0x40/0x7c > > [ 162.988027] [<c0110b91>] ? smp_apic_timer_interrupt+0x68/0x73 > > [ 162.988027] [<c0103521>] ? apic_timer_interrupt+0x2d/0x34 > > [ 162.988027] [<c017af71>] ? unmap_vmas+0x308/0x47f > > [ 162.988027] [<c017afa2>] ? unmap_vmas+0x339/0x47f > > [ 162.988027] [<c0143db5>] ? trace_hardirqs_on_caller+0x17/0x15a > > [ 162.988027] [<c017e326>] ? exit_mmap+0x83/0x104 > > [ 162.988027] [<c01244b8>] ? mmput+0x39/0x89 > > [ 162.988027] [<c01278de>] ? exit_mm+0xc3/0xcb > > [ 162.988027] [<c0128b99>] ? do_exit+0x199/0x6d5 > > [ 162.988027] [<c04e56b0>] ? trace_hardirqs_on_thunk+0xc/0x10 > > [ 162.988027] [<c0129137>] ? do_group_exit+0x62/0x88 > > [ 162.988027] [<c0129171>] ? sys_exit_group+0x14/0x16 > > [ 162.988027] [<c0102ea1>] ? sysenter_do_call+0x12/0x31 > > [ 162.988027] Code: Bad EIP value. > > [ 162.988027] EIP: [<00000000>] 0x0 SS:ESP 0068:c0b01fd4 > > [ 162.990524] ---[ end trace 4eaa2a86a8e2da22 ]--- > > [ 162.990555] Kernel panic - not syncing: Fatal exception in interrupt > > > > > > Kernel is current -git with a unrelated > > networking patch (http://marc.info/?l=linux-netdev&m=123088641023335&w=2) > > > > root@...terabbit:/usr/src/linux# grep RCU .config > > # CONFIG_CLASSIC_RCU is not set > > # CONFIG_TREE_RCU is not set > > CONFIG_PREEMPT_RCU=y > > CONFIG_RCU_TRACE=y > > # CONFIG_TREE_RCU_TRACE is not set > > CONFIG_PREEMPT_RCU_TRACE=y > > CONFIG_RCU_TORTURE_TEST=m > > > > Greetings, Eric > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@...r.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists