PR/60554 CVS commit: src/sys/nfs

The following reply was made to PR kern/60554; it has been noted by GNATS.

From: "Taylor R Campbell" <[email protected]>
To: [email protected]
Cc: 
Subject: PR/60554 CVS commit: src/sys/nfs
Date: Sat, 8 Aug 2026 00:09:25 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Sat Aug  8 00:09:25 UTC 2026
 
 Modified Files:
 	src/sys/nfs: nfs_vnops.c
 
 Log Message:
 nfs: Avoid UB in integer shift amounts.
 
 Just use ilog2 explicitly here, instead of writing out a loop with
 shifts and increments to compute it more slowly and buggily.  Note
 the confusing fencepost adjustment.  Clamp _PC_FILESIZEBITS at the
 actual size of off_t since we can't go beyond that.
 
 PR kern/60554: nfs: integer shift UB in pathconf(_PC_FILESIZEBITS)
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.328 -r1.329 src/sys/nfs/nfs_vnops.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.