Messages in this thread | | | Date | Tue, 22 Apr 2008 01:17:30 +0200 | From | Jiri Slaby <> | Subject | Re: 2.6.25-git2: BUG: unable to handle kernel paging request at ffffffffffffffff |
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On 04/22/2008 01:02 AM, Jiri Slaby wrote: > On 04/22/2008 12:54 AM, Paul E. McKenney wrote: >> On Tue, Apr 22, 2008 at 12:26:04AM +0200, Jiri Slaby wrote: >>>> Having slub_debug enabled, tomorrow will be results, I guess...
OK, methinks it's tomorrow yet, at least here.
>>> Sorry, one more entry: >>> >>> 00000000000000f0 dentry.d_op (Zdenek, offset ? around 136) > > Zdenek's is at offset 184. > >>> 00f0000000000000 dentry.d_hash.next (me, offset 24) >>> ffff81f02003f16c dentry.d_name.name (me, offset 56) >>> memory ORed by 000000f000000000 >>> fffff0002004c1b0 file.f_mapping (me, offset 176) >>> memory hole, it was something like >>> (ffff81002004c1b0 & ~00000f0000000000) | 0000f00000000000? >>> ffffffffffffffff dentry.d_hash.next (Rafael, offset ? around 24) >>> -1, ~0ULL
The same place, dentry.d_hash.next is 1. No slub debug clues... I think, I'll give slab a try. Any other clues?
Is this enough? $ grep SLUB ../my_64/.config CONFIG_SLUB_DEBUG=y CONFIG_SLUB=y # CONFIG_SLUB_DEBUG_ON is not set # CONFIG_SLUB_STATS is not set $ cat /proc/cmdline root=/dev/md1 vga=1 ro reboot=a,w slub_debug
BUG: unable to handle kernel NULL pointer dereference at 0000000000000001 IP: [<ffffffff802aca27>] __d_lookup+0x97/0x160 PGD 4510b067 PUD 6768d067 PMD 0 Oops: 0000 [1] SMP last sysfs file: /sys/devices/virtual/net/tun0/statistics/collisions CPU 0 Modules linked in: test ipv6 tun bitrev arc4 ecb crypto_blkcipher cryptomgr crypto_algapi ath5k mac80211 rtc_cmos crc32 sr_mod usbhid ohci1394 ehci_hcd rtc_core hid ieee1394 floppy cdrom cfg80211 rtc_lib evdev ff_memless Pid: 18600, comm: git-status Not tainted 2.6.25-mm1_64 #403 RIP: 0010:[<ffffffff802aca27>] [<ffffffff802aca27>] __d_lookup+0x97/0x160 RSP: 0018:ffff81006096bbf8 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000012 RDX: ffff8100200f3568 RSI: ffff81006096bd08 RDI: ffff810020c0c880 RBP: ffff81006096bc58 R08: ffff81006096bd08 R09: 000000000000002c R10: 000000000000002d R11: ffff81006428c200 R12: ffff810021f0a770 R13: 000000001b820c0e R14: ffff810020c0c880 R15: ffff81006096bc28 FS: 00007f2aa905e710(0000) GS:ffffffff80664000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000001 CR3: 0000000008fba000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process git-status (pid: 18600, threadinfo ffff81006096a000, task ffff810007988fc0) Stack: ffff81006096bd08 0000000000000009 ffff810020c0c888 000000098026c2fd ffff81006428c21c 0000000000000000 0000000000000001 0000000000000001 ffff81006096be38 ffff81006096be38 ffff81006096bd08 ffff81006096bd18 Call Trace: [<ffffffff802a1e85>] do_lookup+0x35/0x220 [<ffffffff802ad3b8>] ? dput+0x38/0x180 [<ffffffff802a22c2>] __link_path_walk+0x252/0x1010 [<ffffffff802911d0>] ? init_object+0x50/0x90 [<ffffffff802a30ee>] path_walk+0x6e/0xe0 [<ffffffff802a33b2>] do_path_lookup+0xa2/0x240 [<ffffffff802a434c>] __user_walk_fd+0x4c/0x80 [<ffffffff8029ba0b>] vfs_lstat_fd+0x2b/0x70 [<ffffffff8029bbe3>] ? cp_new_stat+0xe3/0xf0 [<ffffffff8029bc97>] sys_newlstat+0x27/0x50 [<ffffffff8020b91b>] system_call_after_swapgs+0x7b/0x80
Code: 48 89 c3 48 8b 55 d0 8b 45 bc 48 85 d2 48 89 45 a8 75 18 eb 5f 0f 1f 80 00 00 00 00 48 8b 1b 48 89 5d d0 49 8b 07 48 85 c0 74 49 <48> 8b 03 4c 8d 63 e8 0f 18 08 45 39 6c 24 30 75 e0 4d 39 74 24 RIP [<ffffffff802aca27>] __d_lookup+0x97/0x160 RSP <ffff81006096bbf8> CR2: 0000000000000001 ---[ end trace f6b7fa8dcbc7b8f7 ]---
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