Re: [V9fs-developer] [PATCH kernel] 9p/trans_fd: Check file mode at opening

2020-07-29 Thread Greg Kurz
On Wed, 29 Jul 2020 09:50:21 +1000 Alexey Kardashevskiy wrote: > > > On 29/07/2020 03:42, Greg Kurz wrote: > > Hi Alexey, > > > > Working on 9p now ?!? ;-) > > No, I am running syzkaller and seeing things :) > :) > > > Cc'ing Dominique Martinet who appears to be the person who takes care

Re: [V9fs-developer] [PATCH kernel] 9p/trans_fd: Check file mode at opening

2020-07-28 Thread Greg Kurz
On Wed, 29 Jul 2020 08:14:49 +0200 Dominique Martinet wrote: > Greg Kurz wrote on Tue, Jul 28, 2020: > > > The "fd" transport layer uses 2 file descriptors passed externally > > > and calls kernel_write()/kernel_read() on these. If files were opened > > > without FMODE_WRITE/FMODE_READ, WARN_ON_O

Re: [V9fs-developer] [PATCH kernel] 9p/trans_fd: Check file mode at opening

2020-07-28 Thread Dominique Martinet
Greg Kurz wrote on Tue, Jul 28, 2020: > > The "fd" transport layer uses 2 file descriptors passed externally > > and calls kernel_write()/kernel_read() on these. If files were opened > > without FMODE_WRITE/FMODE_READ, WARN_ON_ONCE() will fire. There already is a fix in linux-next as a39c46067c84

Re: [V9fs-developer] [PATCH kernel] 9p/trans_fd: Check file mode at opening

2020-07-28 Thread Alexey Kardashevskiy
On 29/07/2020 03:42, Greg Kurz wrote: > Hi Alexey, > > Working on 9p now ?!? ;-) No, I am running syzkaller and seeing things :) > Cc'ing Dominique Martinet who appears to be the person who takes care of 9p > these days. > > On Tue, 28 Jul 2020 22:41:29 +1000 > Alexey Kardashevskiy wrote:

Re: [V9fs-developer] [PATCH kernel] 9p/trans_fd: Check file mode at opening

2020-07-28 Thread Greg Kurz
Hi Alexey, Working on 9p now ?!? ;-) Cc'ing Dominique Martinet who appears to be the person who takes care of 9p these days. On Tue, 28 Jul 2020 22:41:29 +1000 Alexey Kardashevskiy wrote: > The "fd" transport layer uses 2 file descriptors passed externally > and calls kernel_write()/kernel_rea