Page MenuHomeFreeBSD
Differential D31197

lio_listio: Don't post a completion notification if none was requested
ClosedPublic
Actions

Authored by markj on Jul 15 2021, 6:11 PM.
Tags
None
Referenced Files
F103581568: D31197.diff
Tue, Nov 26, 6:13 PM
Unknown Object (File)
Tue, Nov 12, 6:23 AM
Unknown Object (File)
Tue, Nov 12, 5:45 AM
Unknown Object (File)
Oct 26 2024, 4:36 PM
Unknown Object (File)
Oct 19 2024, 8:30 PM
Unknown Object (File)
Oct 14 2024, 7:31 PM
Unknown Object (File)
Oct 12 2024, 10:24 AM
Unknown Object (File)
Oct 12 2024, 10:24 AM
View All 56 Files
Subscribers
imp

Details

Reviewers
asomers
Commits
rG2e5f6152952e: lio_listio: Don't post a completion notification if none was requested
Summary

One is allowed to use LIO_NOWAIT without specifying a sigevent. In this
case, lj->lioj_signal is left uninitialized, but several code paths
examine liov_signal.sigev_notify to figure out which notification to
post. Unconditionally initialize that field to SIGEV_NONE.

Add a dumb test case which triggers the bug.

Reported by: KMSAN+syzkaller
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Not Applicable
Unit
Tests Not Applicable

Revision Contents
Changeset List

PathSize
sys/
kern/
1 line
tests/
sys/
aio/
10 lines

Diff 92266

View Options

sys/kern/vfs_aio.c

Loading...
View Options

tests/sys/aio/lio_test.c

Loading...