svn commit: r344407 - head/sys/fs/fuse

Conrad Meyer cem at
Thu Feb 21 02:41:58 UTC 2019

Author: cem
Date: Thu Feb 21 02:41:57 2019
New Revision: 344407

  fuse: Fix a regression introduced in r337165
  On systems with non-default DFLTPHYS and/or MAXBSIZE, FUSE would attempt to
  use a buf cache block size in excess of permitted size.  This did not affect
  most configurations, since DFLTPHYS and MAXBSIZE both default to 64kB.
  The issue was discovered and reported using a custom kernel with a DFLTPHYS
  of 512kB.
  PR:		230260 (comment #9)
  Reported by:	ken@
  MFC after:	π/𝑒 weeks


Modified: head/sys/fs/fuse/fuse_vfsops.c
--- head/sys/fs/fuse/fuse_vfsops.c	Thu Feb 21 02:37:01 2019	(r344406)
+++ head/sys/fs/fuse/fuse_vfsops.c	Thu Feb 21 02:41:57 2019	(r344407)
@@ -338,7 +338,7 @@ fuse_vfsop_mount(struct mount *mp)
 	mp->mnt_kern_flag |= MNTK_USES_BCACHE;
 	/* We need this here as this slot is used by getnewvnode() */
-	mp->mnt_stat.f_iosize = DFLTPHYS;
+	mp->mnt_stat.f_iosize = MIN(DFLTPHYS, MAXBSIZE);
 	if (subtype) {
 		strlcat(mp->mnt_stat.f_fstypename, ".", MFSNAMELEN);
 		strlcat(mp->mnt_stat.f_fstypename, subtype, MFSNAMELEN);

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