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-rw-r--r--sys/fs/msdosfs/msdosfs_fat.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/fs/msdosfs/msdosfs_fat.c b/sys/fs/msdosfs/msdosfs_fat.c
index c660601..3c46c03 100644
--- a/sys/fs/msdosfs/msdosfs_fat.c
+++ b/sys/fs/msdosfs/msdosfs_fat.c
@@ -399,6 +399,8 @@ usemap_alloc(pmp, cn)
MSDOSFS_ASSERT_MP_LOCKED(pmp);
+ KASSERT((pmp->pm_flags & MSDOSFSMNT_RONLY) == 0,
+ ("usemap_alloc on ro msdosfs mount"));
KASSERT((pmp->pm_inusemap[cn / N_INUSEBITS] & (1 << (cn % N_INUSEBITS)))
== 0, ("Allocating used sector %ld %ld %x", cn, cn % N_INUSEBITS,
(unsigned)pmp->pm_inusemap[cn / N_INUSEBITS]));
@@ -415,6 +417,8 @@ usemap_free(pmp, cn)
{
MSDOSFS_ASSERT_MP_LOCKED(pmp);
+ KASSERT((pmp->pm_flags & MSDOSFSMNT_RONLY) == 0,
+ ("usemap_free on ro msdosfs mount"));
pmp->pm_freeclustercount++;
pmp->pm_flags |= MSDOSFS_FSIMOD;
KASSERT((pmp->pm_inusemap[cn / N_INUSEBITS] & (1 << (cn % N_INUSEBITS)))
@@ -715,6 +719,8 @@ chainalloc(pmp, start, count, fillwith, retcluster, got)
u_long cl, n;
MSDOSFS_ASSERT_MP_LOCKED(pmp);
+ KASSERT((pmp->pm_flags & MSDOSFSMNT_RONLY) == 0,
+ ("chainalloc on ro msdosfs mount"));
for (cl = start, n = count; n-- > 0;)
usemap_alloc(pmp, cl++);
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