That's a long list of EPERMs in strace and mostly useless by itself, since chrome make use of nonblocking/asynchronous IO, so you always have to look for the syscall that had caused the EPERM. A full trace is rather huge.
In case you have a yubikey (not just a regular u2f oder blue yubikey, they don't show the problem) simply do something like strace -s 80 -f -o chromiumyubitrace chromium-browser --temp-profile https://demo.yubico.com/u2f ** Attachment added: "chromium_yubikey_EPERM.txt" https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1825331/+attachment/5258943/+files/chromium_yubikey_EPERM.txt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/1825331 Title: apparmor chromium profile blocks yubikeys Status in apparmor package in Ubuntu: New Bug description: Hi, some months ago (can't give a precise date) I could use all my pure u2f tokens, as well as Yubikey tokens with mixed apps (yubikey 4, yubikey neo) pretty well with chromium browser as u2f tokens. For some months now and since an update of the chromium-browser in 18.04, it was working with pure u2f tokens (e.g. the blue yubikeys, FIDO u2f token,...), but not with regular yubikeys anymore, although command line tools like u2f-host worked pretty well. I checked the kernel messages and did not find any apparmor deny message or other reasons. Furthermore, the apparmor profile for usr.bin.chromium-browser was in complain mode only. Now I did again some debugging and found that the problem is gone after aa-disable usr.bin.chromium-browser Although the profile was in complain mode and dmesg did not show any forbidden actions, the strace showed some EPERM (Operation not permitted) errors, that's why I tried to disable aa. Interestingly, this problem does not affect regular u2f tokens, just the yubikeys with additional functions. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: apparmor-profiles 2.12-4ubuntu5.1 ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18 Uname: Linux 4.15.0-47-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CurrentDesktop: LXDE Date: Thu Apr 18 11:14:22 2019 InstallationDate: Installed on 2018-04-30 (352 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) PackageArchitecture: all ProcKernelCmdline: BOOT_IMAGE=/vmlinuz-4.15.0-47-generic root=UUID=5dca854b-2558-44a1-918d-c8380934754d ro nosplash SourcePackage: apparmor Syslog: UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1825331/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
