On Wed, Nov 04, 2020 at 10:30:05PM +0100, Samuel Thibault wrote: > Matthias Reichl, le mer. 04 nov. 2020 22:15:05 +0100, a ecrit: > > > This looks like only a warning, did it actually crash? > > > > Yes, scroll down a bit, the null pointer oops followed almost > > immediately after that > > > > [ 49.979043] BUG: kernel NULL pointer dereference, address: 0000000000000090 > > Ah, [ 50.102938] tty_init_dev+0xb5/0x1d0 > > probably the trailing release_tty call that does > > tty->port->itty = NULL; > (itty is after a struct tty_bufhead + the tty pointer, that looks > plausible). > > so probably an if (tty->port) in release_tty could help? Thanks a lot, good catch! This is indeed where the crash happens and checking for tty->port in release_tty() prevents that. I'll send a patch. so long, Hias
