New: fanotify reports parent PPID insted of PID for FAN_MODIFY events
https://bugzilla.kernel.org/show_bug.cgi?id=216775
Bug ID: 216775
Summary: fanotify reports parent PPID insted of PID for
FAN_MODIFY events
Product: File System
Version: 2.5
Kernel Version: 5.15.0
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
Assignee: [email protected]
Reporter: [email protected]
Regression: NoHello,
While I've been developing a library around fanotify in Go, I noticed that fanotify subsystem reports the parent process ID in fanotify_event_metadata.pid instead of the Process ID when mask is set to FAN_MODIFY. I was able to confirm the error through a test and also manually verifying the PIDs in the audit log. I did not observe this behaviour for FAN_ACCESS bit.
I've been able to reproduce this on -
Ubuntu 20.04.5 - 5.15.0-53-generic
Ubuntu 22.10 - 5.19.0-23-generic
It can be reproduced by -
git clone [email protected]:opcoder0/fanotify.git
cd fanotify
sudo go test -v
The test "TestWithCapSysAdmFanotifyFileModified" fails reporting pid mismatch.
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Quoted 33 lines · On Mon, Dec 5, 2022 at 7:02 AM <[email protected]> wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=216775
Bug ID: 216775 Summary: fanotify reports parent PPID insted of PID for FAN_MODIFY events Product: File System Version: 2.5 Kernel Version: 5.15.0 Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: [email protected] Reporter: [email protected] Regression: NoHello,
While I've been developing a library around fanotify in Go, I noticed that fanotify subsystem reports the parent process ID in fanotify_event_metadata.pid instead of the Process ID when mask is set to
FAN_MODIFY. I was able to confirm the error through a test and also manually verifying the PIDs in the audit log. I did not observe this behaviour forFAN_ACCESSbit.I've been able to reproduce this on -
Ubuntu 20.04.5 - 5.15.0-53-generic
Ubuntu 22.10 - 5.19.0-23-generic
Quoted 8 lines
It can be reproduced by -
git clone [email protected]:opcoder0/fanotify.git
cd fanotify
sudo go test -vThe test "TestWithCapSysAdmFanotifyFileModified" fails reporting pid mismatch.
It's a test bug.
The modify event with self pid is generated by os.WriteFile() Either change test to expect modify event with self pid or move test file creation before starting the listener.
Thanks,
Amir.
[Bug 216775] fanotify reports parent PPID insted of PID for FAN_MODIFY events
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=216775
--- Comment #1 from Amir Goldstein ([email protected]) ---
Quoted 36 lines · On Mon, Dec 5, 2022 at 7:02 AM <[email protected]> wrote:
https://bugzilla.kernel.org/show_bug.cgi?id=216775
Bug ID: 216775 Summary: fanotify reports parent PPID insted of PID for FAN_MODIFY events Product: File System Version: 2.5 Kernel Version: 5.15.0 Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: [email protected] Reporter: [email protected] Regression: NoHello,
While I've been developing a library around fanotify in Go, I noticed that fanotify subsystem reports the parent process ID in fanotify_event_metadata.pid
instead of the Process ID when mask is set toFAN_MODIFY. I was able to confirm
the error through a test and also manually verifying the PIDs in the audit log.
I did not observe this behaviour forFAN_ACCESSbit.I've been able to reproduce this on -
Ubuntu 20.04.5 - 5.15.0-53-generic
Ubuntu 22.10 - 5.19.0-23-generic
Quoted 9 lines
It can be reproduced by -
git clone [email protected]:opcoder0/fanotify.git
cd fanotify
sudo go test -vThe test "TestWithCapSysAdmFanotifyFileModified" fails reporting pid mismatch.
It's a test bug.
The modify event with self pid is generated by os.WriteFile() Either change test to expect modify event with self pid or move test file creation before starting the listener.
Thanks,
Amir.
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[Bug 216775] fanotify reports parent PPID insted of PID for FAN_MODIFY events
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=216775
--- Comment #2 from opcoder0 ([email protected]) --- Sorry missed that. Thanks a lot!
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[Bug 216775] fanotify reports parent PPID insted of PID for FAN_MODIFY events
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=216775
opcoder0 ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID--- Comment #3 from opcoder0 ([email protected]) --- Test issue.
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