| Summary: | BUG: unable to handle kernel NULL pointer dereference at 0000000000000038, set_next_entity | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | yangyi <yiyang.specific> | ||||
| Component: | kernel | Assignee: | Red Hat Kernel Manager <kernel-mgr> | ||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 6.0 | CC: | bmaly, kzhang | ||||
| Target Milestone: | rc | Flags: | kzhang:
needinfo?
(yiyang.specific) |
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| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2014-12-17 23:24:19 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | ||||||
| Attachments: |
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Hi, you hit this bug for just one time? Thanks! No, about 10+ times. Thanks for reply, then could you reproduce it steadily? If yes, could you tell the steps? and could you please also check whether you can trigger the bug on 6.1 kernel 2.6.32-131.0.15? Many thanks! Since RHEL 6.2 External Beta has begun, and this bug remains unresolved, it has been rejected as it is not proposed as exception or blocker. Red Hat invites you to ask your support representative to propose this request, if appropriate and relevant, in the next release of Red Hat Enterprise Linux. More info on this... We were seeing this bug constantly (daily) in older kernels (on HS21/HS22 hardware). In addition to set_next_entity(), the NULL sched_entity was also observed frequently in put_prev_task_fair(), task_tick_fair() and enqueue_task_fair(). The issue seems to be resolved in linux-2.6.32-220.el6. We have not seen a single instance of the NULL sched_entity on the latest kernel. Seems to resolve this issue for us anyway. |
Created attachment 518252 [details] config files Description of problem: kernel report NULL pointer dereference Version-Release number of selected component (if applicable): 2.6.32-71.7.1.el6 How reproducible: Not clear Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: panic log BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1083 in_atomic(): 0, irqs_disabled(): 1, pid: 11934, name: perl Pid: 11934, comm: perl Tainted: G W ---------------- 2.6.32_1-1-0-0-kdump #4 Call Trace: [<ffffffff81039467>] ? __might_sleep+0xc6/0xcb [<ffffffff8136eedc>] ? do_page_fault+0x1ea/0x414 [<ffffffff810d4ab2>] ? mnt_want_write+0x3a/0x65 [<ffffffff810d2b73>] ? touch_atime+0x12c/0x133 [<ffffffff810c6d49>] ? pipe_read+0x37a/0x38e [<ffffffff8136d07f>] ? page_fault+0x1f/0x30 [<ffffffff8102fc71>] ? set_next_entity+0x9/0x33 [<ffffffff810306c1>] ? pick_next_task_fair+0x70/0x96 [<ffffffff8136af7c>] ? schedule+0x53c/0x804 [<ffffffff810c074b>] ? vfs_read+0x133/0x162 [<ffffffff810c0a2e>] ? sys_read+0x45/0x6e [<ffffffff8100c589>] ? retint_careful+0xd/0x21 BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 IP: [<ffffffff8102fc71>] set_next_entity+0x9/0x33 PGD 2da468067 PUD 1ce812067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/kernel/kexec_crash_loaded CPU 3 Modules linked in: dm_mirror dm_region_hash dm_log dm_mod button battery ac ehci_hcd uhci_hcd usbcore shpchp igb e 1000 sata_promise [last unloaded: x_tables] Modules linked in: dm_mirror dm_region_hash dm_log dm_mod button battery ac ehci_hcd uhci_hcd usbcore shpchp igb e1000 sata_promise [last unloaded: x_tables] Pid: 11934, comm: perl Tainted: G W ---------------- 2.6.32_1-1-0-0-kdump #4 ProLiant DL180 G6 RIP: 0010:[<ffffffff8102fc71>] [<ffffffff8102fc71>] set_next_entity+0x9/0x33 RSP: 0000:ffff880785cd1e90 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: fffffffffffffff0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8800b814d380 RBP: ffff8800b814d380 R08: 0000000000000000 R09: ffff8800b814d450 R10: 0000000000000000 R11: 00000001094f767b R12: 0000000000000000 R13: ffff880044873200 R14: 0000000000000003 R15: 0000000006060006 FS: 00007f891d0696e0(0000) GS:ffff880044860000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000038 CR3: 0000000575cdf000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process perl (pid: 11934, threadinfo ffff880785cd0000, task ffff8800b4b49c40) Stack: 0000000000000000 ffff8800b814d380 0000000000000000 ffffffff810306c1 <0> 0000000000000002 ffff880044873200 0000000000000000 ffffffff8137bf40 <0> 000000000224f138 ffffffff8136af7c 0000000000000001 0000000000001000 Call Trace: [<ffffffff810306c1>] ? pick_next_task_fair+0x70/0x96 [<ffffffff8136af7c>] ? schedule+0x53c/0x804 [<ffffffff810c074b>] ? vfs_read+0x133/0x162 [<ffffffff810c0a2e>] ? sys_read+0x45/0x6e [<ffffffff8100c589>] ? retint_careful+0xd/0x21 Code: 60 00 00 00 00 48 85 f6 74 06 48 39 70 58 75 08 48 c7 40 58 00 00 00 00 48 8b b6 90 00 00 00 eb c5 c3 55 48 89 fd 53 48 89 f3 50 <83> 7e 38 00 74 05 e8 5a fd ff ff 48 8b 45 70 48 8b 80 30 08 00 RIP [<ffffffff8102fc71>] set_next_entity+0x9/0x33 RSP <ffff880785cd1e90> CR2: 0000000000000038