Bug 964363
| Summary: | regression suspicious RCU usage net/mac80211/rate.c:691 suspicious rcu_dereference_check() usage | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Chris Murphy <bugzilla> | ||||
| Component: | kernel | Assignee: | fedora-kernel-wireless | ||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | rawhide | CC: | gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, sgruszka | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2013-06-03 08:24:40 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: | |||||||
| Attachments: |
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Description
Chris Murphy
2013-05-18 04:24:11 UTC
Odd that it doesn't occur in rc1-git5. There are no changes in the network area between -git5 and -git6.
[ 53.639773] ===============================
[ 53.639791] [ INFO: suspicious RCU usage. ]
[ 53.639812] 3.10.0-0.rc1.git6.1.fc20.x86_64 #1 Not tainted
[ 53.639833] -------------------------------
[ 53.639853] net/mac80211/rate.c:691 suspicious rcu_dereference_check() usage!
[ 53.639877]
other info that might help us debug this:
[ 53.639908]
rcu_scheduler_active = 1, debug_locks = 0
[ 53.639936] 4 locks held by kworker/u4:5/54:
[ 53.639955] #0: (wiphy_name(local->hw.wiphy)){.+.+.+}, at: [<ffffffff8108d215>] process_one_work+0x1a5/0x6c0
[ 53.640066] #1: ((&sdata->work)){+.+.+.}, at: [<ffffffff8108d215>] process_one_work+0x1a5/0x6c0
[ 53.640132] #2: (&ifmgd->mtx){+.+.+.}, at: [<ffffffffa05b2015>] ieee80211_sta_rx_queued_mgmt+0x55/0x7c0 [mac80211]
[ 53.640257] #3: (&local->sta_mtx){+.+.+.}, at: [<ffffffffa05cd6d9>] ieee80211_assoc_success+0x1b3/0x9ba [mac80211]
[ 53.640361]
stack backtrace:
[ 53.640387] CPU: 1 PID: 54 Comm: kworker/u4:5 Not tainted 3.10.0-0.rc1.git6.1.fc20.x86_64 #1
[ 53.640414] Hardware name: Apple Inc. MacBookPro4,1/Mac-F42C89C8, BIOS MBP41.88Z.00C1.B03.0802271651 02/27/08
[ 53.640477] Workqueue: phy0 ieee80211_iface_work [mac80211]
[ 53.640505] 0000000000000001 ffff8801343a5740 ffffffff81715f5b ffff8801343a5770
[ 53.640559] ffffffff810d7ba7 ffff8801169bdfb0 0000000000000000 ffff8801195e73e8
[ 53.640610] 000000000000000c ffff8801343a5798 ffffffffa05798e1 ffff88011687a148
[ 53.640664] Call Trace:
[ 53.640693] [<ffffffff81715f5b>] dump_stack+0x19/0x1b
[ 53.640721] [<ffffffff810d7ba7>] lockdep_rcu_suspicious+0xe7/0x120
[ 53.640780] [<ffffffffa05798e1>] rate_control_set_rates+0x81/0xb0 [mac80211]
[ 53.640850] [<ffffffffa05ca41e>] minstrel_update_rates.isra.4+0xee/0x140 [mac80211]
[ 53.640918] [<ffffffffa05cabc6>] minstrel_rate_init+0x3c6/0x480 [mac80211]
[ 53.640989] [<ffffffffa05cc61e>] minstrel_ht_update_caps+0x29e/0x400 [mac80211]
[ 53.641946] [<ffffffffa05cc79e>] minstrel_ht_rate_init+0xe/0x10 [mac80211]
[ 53.642897] [<ffffffffa05cdd9e>] ieee80211_assoc_success+0x878/0x9ba [mac80211]
[ 53.643846] [<ffffffffa05b16b1>] ieee80211_rx_mgmt_assoc_resp+0x171/0x280 [mac80211]
[ 53.644456] [<ffffffffa05b2426>] ieee80211_sta_rx_queued_mgmt+0x466/0x7c0 [mac80211]
[ 53.644749] [<ffffffff8101fcf5>] ? native_sched_clock+0x15/0x80
[ 53.645419] [<ffffffff8101fd69>] ? sched_clock+0x9/0x10
[ 53.646136] [<ffffffff8101fcf5>] ? native_sched_clock+0x15/0x80
[ 53.646833] [<ffffffff8101fd69>] ? sched_clock+0x9/0x10
[ 53.647561] [<ffffffff810ac97d>] ? sched_clock_local+0x1d/0x80
[ 53.648242] [<ffffffff810d93fb>] ? mark_held_locks+0xbb/0x140
[ 53.648907] [<ffffffff8171db46>] ? _raw_spin_unlock_irqrestore+0x36/0x70
[ 53.649619] [<ffffffff810d957d>] ? trace_hardirqs_on_caller+0xfd/0x1c0
[ 53.650321] [<ffffffff810d964d>] ? trace_hardirqs_on+0xd/0x10
[ 53.651002] [<ffffffffa057428c>] ieee80211_iface_work+0x25c/0x360 [mac80211]
[ 53.651708] [<ffffffff8108d281>] process_one_work+0x211/0x6c0
[ 53.652403] [<ffffffff8108d215>] ? process_one_work+0x1a5/0x6c0
[ 53.653102] [<ffffffff8108d84d>] worker_thread+0x11d/0x3a0
[ 53.653786] [<ffffffff8108d730>] ? process_one_work+0x6c0/0x6c0
[ 53.654493] [<ffffffff81095ced>] kthread+0xed/0x100
[ 53.655167] [<ffffffff81095c00>] ? insert_kthread_work+0x80/0x80
[ 53.655814] [<ffffffff817278ec>] ret_from_fork+0x7c/0xb0
[ 53.656499] [<ffffffff81095c00>] ? insert_kthread_work+0x80/0x80
The Fedora 20 component was created in error. We only create new Fedora versions when we branch a new release. These bugs are all being moved to rawhide. Please retarget them to 19 if they also apply to the Fedora 19 branched release. Thanks. Fix for this is currently on net tree: https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=f6b3d85f7f6d66f890862d763b2ed092c5dd4322 Probably it will be commited in -rc2 or at the latest in -rc3 . Missed -rc2, but we'll pick it up in a git snapshot as soon as it hits Linus' tree. Thanks Stanislaw. Appears to be fixed in 3.10.0-0.rc3.git0.1.fc20.x86_64.debug |