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
Unknown Object (File)
Fri, Mar 14, 4:35 PM
Unknown Object (File)
Sat, Mar 1, 2:47 PM
Unknown Object (File)
Feb 14 2025, 7:23 PM
Unknown Object (File)
Feb 10 2025, 9:44 AM
Unknown Object (File)
Feb 9 2025, 2:32 AM
Unknown Object (File)
Jan 25 2025, 7:58 PM
Unknown Object (File)
Jan 24 2025, 7:16 PM
Unknown Object (File)
Jan 23 2025, 1:29 PM
View All 66 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...