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selsocket: handle sopoll() errors correctly

Description

selsocket: handle sopoll() errors correctly

Without this change, unmounting smbfs filesystems with an INVARIANTS
kernel would panic after 10e64782ed59727e8c9fe4a5c7e17f497903c8eb.

Found by: markj
Reviewed by: markj, jhb
Obtained from: CheriBSD
MFC after: 3 days
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D32492

Details

Provenance
brooksAuthored on Wed, Oct 13, 11:43 PM
Reviewer
markj
Differential Revision
D32492: selsocket: handle sopoll() errors correctly
Parents
R10:a524aaf68341: bpf(4): Fix a misnamed constant
Branches
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Tags
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