Bug 1432118
| Summary: | hotplug: Use set_cpus_allowed_ptr() in sync_unplug_thread() | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | John Kacur <jkacur> | ||||
| Component: | kernel-rt | Assignee: | John Kacur <jkacur> | ||||
| kernel-rt sub component: | Other | QA Contact: | Jiri Kastner <jkastner> | ||||
| Status: | CLOSED ERRATA | Docs Contact: | |||||
| Severity: | high | ||||||
| Priority: | high | CC: | bhu, jshortt, williams | ||||
| Version: | 7.4 | ||||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2017-08-01 19:02:59 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 1353018, 1410158 | ||||||
| Attachments: |
|
||||||
Created attachment 1262994 [details]
hotplug: Use set_cpus_allowed_ptr() in sync_unplug_thread()
Fixed with 483aacae4cc1 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2017:2077 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2017:2077 |
do_set_cpus_allowed() is not safe vs ->sched_class change. crash> bt PID: 11676 TASK: ffff88026f979da0 CPU: 22 COMMAND: "sync_unplug/22" #0 [ffff880274d25bc8] machine_kexec at ffffffff8103b41c #1 [ffff880274d25c18] crash_kexec at ffffffff810d881a #2 [ffff880274d25cd8] oops_end at ffffffff81525818 #3 [ffff880274d25cf8] do_invalid_op at ffffffff81003096 #4 [ffff880274d25d90] invalid_op at ffffffff8152d3de [exception RIP: set_cpus_allowed_rt+18] RIP: ffffffff8109e012 RSP: ffff880274d25e48 RFLAGS: 00010202 RAX: ffffffff8109e000 RBX: ffff88026f979da0 RCX: ffff8802770cb6e8 RDX: 0000000000000000 RSI: ffffffff81add700 RDI: ffff88026f979da0 RBP: ffff880274d25e78 R8: ffffffff816112e0 R9: 0000000000000001 R10: 0000000000000001 R11: 0000000000011940 R12: ffff88026f979da0 R13: ffff8802770cb6d0 R14: ffff880274d25fd8 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #5 [ffff880274d25e60] do_set_cpus_allowed at ffffffff8108e65f #6 [ffff880274d25e80] sync_unplug_thread at ffffffff81058c08 #7 [ffff880274d25ed8] kthread at ffffffff8107cad6 #8 [ffff880274d25f50] ret_from_fork at ffffffff8152bbbc crash> task_struct ffff88026f979da0 | grep class sched_class = 0xffffffff816111e0 <fair_sched_class+64>, Signed-off-by: Mike Galbraith <umgwanakikbuti> Signed-off-by: Sebastian Andrzej Siewior <bigeasy>