On Tue, Sep 1, 2015 at 12:21 PM, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote: > Hi All, > > All of my test machines hit the backtrace below with Linus' tree as of > this morning. Any ideas? It looks like you are seeing the same as below: * https://lkml.org/lkml/2015/8/31/440 > [ +0.160966] =============================== > [ +0.000001] [ INFO: suspicious RCU usage. ] > [ +0.000002] 4.3.0-0.rc0.git1.1.fc24.x86_64 #1 Not tainted > [ +0.000001] ------------------------------- > [ +0.000002] security/device_cgroup.c:405 device_cgroup:verify_new_ex > called without proper synchronization! > [ +0.000000] > other info that might help us debug this: > > [ +0.000001] > rcu_scheduler_active = 1, debug_locks = 0 > [ +0.000002] 4 locks held by systemd/1: > [ +0.000010] #0: (sb_writers#6){.+.+.+}, at: [<ffffffff81267f87>] > vfs_write+0x187/0x1a0 > [ +0.000006] #1: (&of->mutex){+.+.+.}, at: [<ffffffff812f3996>] > kernfs_fop_write+0x66/0x190 > [ +0.000005] #2: (s_active#61){++++.+}, at: [<ffffffff812f399e>] > kernfs_fop_write+0x6e/0x190 > [ +0.000007] #3: (devcgroup_mutex){+.+...}, at: > [<ffffffff813ada3c>] devcgroup_access_write+0x3c/0x6e0 > [ +0.000000] > stack backtrace: > [ +0.000003] CPU: 3 PID: 1 Comm: systemd Not tainted > 4.3.0-0.rc0.git1.1.fc24.x86_64 #1 > [ +0.000001] Hardware name: /D34010WYK, BIOS > WYLPT10H.86A.0026.2014.0514.1714 05/14/2014 > [ +0.000004] 0000000000000000 000000006dc9945a ffff88040ce73c68 > ffffffff8184e49c > [ +0.000003] 0000000000000000 ffff88040cdd4000 ffff88040ce73c98 > ffffffff81101437 > [ +0.000003] ffff880408646d00 ffff88040ce73d00 0000000000000002 > 0000000000000001 > [ +0.000001] Call Trace: > [ +0.000006] [<ffffffff8184e49c>] dump_stack+0x4c/0x65 > [ +0.000004] [<ffffffff81101437>] lockdep_rcu_suspicious+0xd7/0x110 > [ +0.000004] [<ffffffff813ad6e8>] verify_new_ex+0xd8/0xe0 > [ +0.000003] [<ffffffff813addaf>] devcgroup_access_write+0x3af/0x6e0 > [ +0.000005] [<ffffffff81023999>] ? sched_clock+0x9/0x10 > [ +0.000004] [<ffffffff811599e4>] cgroup_file_write+0x44/0x1e0 > [ +0.000003] [<ffffffff812f3a71>] kernfs_fop_write+0x141/0x190 > [ +0.000002] [<ffffffff81267497>] __vfs_write+0x37/0x100 > [ +0.000002] [<ffffffff81267f87>] ? vfs_write+0x187/0x1a0 > [ +0.000004] [<ffffffff8138929d>] ? security_file_permission+0x3d/0xc0 > [ +0.000002] [<ffffffff81267ea9>] vfs_write+0xa9/0x1a0 > [ +0.000003] [<ffffffff81268bc8>] SyS_write+0x58/0xd0 > [ +0.000004] [<ffffffff818580ee>] entry_SYSCALL_64_fastpath+0x12/0x76 > -- > To unsubscribe from this list: send the line "unsubscribe linux-security-module" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- paul moore www.paul-moore.com -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
