Date: Wed, 3 Feb 2021 08:19:09 +0100 From: Greg KH <gregkh@...uxfoundation.org> To: ???? <zhaowenjia@....xjtu.edu.cn> Cc: security@...nel.org, oss-security@...ts.openwall.com, jirislaby@...nel.org, nico@...xnic.net Subject: Re: KASAN: use-after-free in con_scroll On Wed, Feb 03, 2021 at 03:04:55PM +0800, ???? wrote: > Dear Linux kernel developers, > > I found a crash "KASAN: use-after-free in con_scroll+0x45c/0x620 drivers/tty/vt/vt.c:641" when running the syzkaller, > > It is can be reproduced. I did not find a report about this problem. Hope it is useful. > > > > > Linux version: Linux v5.9-rc8 (549738f15) > > > The following is the crash report. > > ================================================================== > > BUG: KASAN: use-after-free in scr_memmovew include/linux/vt_buffer.h:68 [inline] > BUG: KASAN: use-after-free in con_scroll+0x45c/0x620 drivers/tty/vt/vt.c:641 > Read of size 693770 at addr ffff8880000b894c by task syz-executor.2/7755 > > CPU: 0 PID: 7755 Comm: syz-executor.2 Not tainted 5.1.0 #4 5.1.0 is _VERY_ old, please try reproducing this on a more modern kernel (i.e. 5.10 or newer). thanks, greg k-h
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