fanotify09 case 3 (Events on files and dirs with both inode and mount marks) from ubuntu_ltp_syscalls failed

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1876684

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

This issue could be found on 5.0 kernel as well.

Test kernel for D/E/F https://people.canonical.com/~phlin/kernel/lp-1876684-fanotify09-3/

For D, backport needed as it's missing https://github.com/torvalds/linux/commit/0321e03cb4572fb3b56582bcb4927c1fe985b191

For B, WIP, it's missing https://github.com/torvalds/linux/commit/2d10b23082a7eb8be508b3789f2e7250a88a5ddb

Fix applied on Eoan via stable-update (bug 1881657)

Verified and passed.

Fix applied on Focal via stable-update (bug 1879759)

Verified and passed.

failed on Bionic/azure-4.15 : 4.15.0-1097.107 : amd64

Still visible on 4.15.0-1059.65 - oracle

Found on bionic/fips 4.15.0-1053.61

This time on test #2

8817. 02/04 17:51:59 DEBUG| utils:0153| [stdout] fanotify09.c:241: TINFO: Test #2: Events on non-dir child and parent with both parent and mount marks
8818. 02/04 17:51:59 DEBUG| utils:0153| [stdout] fanotify09.c:186: TPASS: group 0 got event: mask 2 pid=26632 fd=21 filename=/tmp/ltp-f6ORzS4Nub/tYfGRz/mntpoint/tfile_26632
8819. 02/04 17:51:59 DEBUG| utils:0153| [stdout] fanotify09.c:186: TPASS: group 0 got event: mask 10 pid=26632 fd=22 filename=/tmp/ltp-f6ORzS4Nub/tYfGRz/mntpoint
8820. 02/04 17:51:59 DEBUG| utils:0153| [stdout] fanotify09.c:216: TFAIL: group 1 got event: mask 10 (expected 0) pid=26632 fd=21 filename=
8821. 02/04 17:51:59 DEBUG| utils:0153| [stdout] fanotify09.c:216: TFAIL: group 2 got event: mask 10 (expected 0) pid=26632 fd=21 filename=

Failed on xenial/linux-oracle: 4.15.0-1069.77~16.04.1 for sru-20210315

Found with trusty/linux-azure 4.15.0-1114.127~14.04.1.

Observed in T-4.15/Azure, cycle sru-20210531 .

Backport of 2d10b23082a7 ("fanotify: return only user requested event types in event mask") to bionic v4.15 is non trivial (dependency on at least 5b0457ad021f ("fsnotify: remove redundant arguments to handle_event()")). Better to simply hint the test.

Observed in B/aws (kernel 4.15), cycle sru-20210621.

Observed in B/aws-fips (kernel 4.15), cycle sru-20210621.

Found on T-azure-4.15.0-1124.137~14.04.1