kernel panic at quotactl with 5.2-current

Pawel Jakub Dawidek pjd at
Wed Apr 21 01:30:12 PDT 2004

On Tue, Apr 20, 2004 at 07:17:40PM +0300, Alex Lyashkov wrote:
+> Hello All
+> Steps for reproduce:
+> 1) start with generic kernel.
+> 2) install samba 2.2.8a from ports with quota & ACL support.
+> 3) mount fat32 partition to some mount point, as example mount /mnt/dos
+> 4) add to smb.conf 
+> [tmp]
+>    comment = Temporary file space
+>    path = /mnt/dos
+>    read only = no
+>    public = yes
+> 5) mount this share via smbmount from linux box and start mc (i think it
+> work and with other access to this share)
+> ...
+> This patch fixed this problem.

Your fix is probably only a workaround.
The problem is more complex, because vn_start_write() is able to return 0
and mp == NULL when operation is not supported by file system.
I'm not yet sure if we just can't fix vn_start_write() to return
EOPNOTSUPP when needed, but there is a special case for this:

	if (error != EOPNOTSUPP)
		return (error);
	return (0);

and I must figure out why. There are many vn_start_write() consumers,
so this can take a while.
Anyway, thank you for your report.

Pawel Jakub Dawidek             
pjd at                 
FreeBSD committer                         Am I Evil? Yes, I Am!
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