On 2013/3/8 4:20, Valdis Kletnieks wrote: > Seeing this in next-20130306: > > [ 180.958482] BUG: unable to handle kernel paging request at ffffffffffffffe0 > [ 180.958488] IP: [<ffffffff811e5661>] avc_has_perm_noaudit+0xbf/0x1bc > > [ 180.958506] Pid: 1910, comm: systemd-udevd Tainted: G O > 3.9.0-rc1-next-20130306-dirty #64 Dell Inc. Latitude E6500 > > [ 180.958537] [<ffffffff811e5790>] avc_has_perm_flags+0x32/0xe4 > [ 180.958540] [<ffffffff81071c81>] ? mark_lock+0x2e/0x225 > [ 180.958543] [<ffffffff811e5ada>] avc_has_perm+0xf/0x11 > [ 180.958546] [<ffffffff811e5e92>] selinux_inode_rename+0x84/0x138 > [ 180.958549] [<ffffffff811002b6>] ? __kmalloc_track_caller+0x107/0x119 > [ 180.958552] [<ffffffff811e36db>] security_inode_rename+0x6f/0x7a > [ 180.958556] [<ffffffff81115a8f>] vfs_rename+0x1e2/0x36a > [ 180.958558] [<ffffffff81115e04>] SYSC_renameat+0x1ed/0x282 > [ 180.958562] [<ffffffff81123485>] ? mntput+0x49/0x50 > [ 180.958566] [<ffffffff81068576>] ? > __read_seqcount_retry.constprop.21+0x20/0x25 > [ 180.958568] [<ffffffff81068b1c>] ? current_kernel_time+0x2a/0x41 > [ 180.958572] [<ffffffff81094215>] ? __audit_syscall_entry+0xf9/0x125 > [ 180.958575] [<ffffffff8111681f>] SyS_renameat+0x9/0xb > [ 180.958577] [<ffffffff81116837>] SyS_rename+0x16/0x1b > [ 180.958581] [<ffffffff815f55d2>] system_call_fastpath+0x16/0x1b > > Most suspicious-looking recent commit in git log: >
I don't think so. The commit changes cgroup_rename(), but the above stack doesn't sugguest it was renaming a cgroup directory. > ommit 65dff759d2948cf18e2029fc5c0c595b8b7da3a5 > Author: Li Zefan <lize...@huawei.com> > Date: Fri Mar 1 15:01:56 2013 +0800 > > cgroup: fix cgroup_path() vs rename() race > > rename() will change dentry->d_name. The result of this race can > be worse than seeing partially rewritten name, but we might access > a stale pointer because rename() will re-allocate memory to hold > a longer name. > > I admit not having any clue what crazy antics systemd was trying to do > at the time. If this doesn't ring a bell, I'll go bisect it. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
