On Tue, Aug 6, 2019 at 2:45 PM Oliver Neukum <oneukum@xxxxxxxx> wrote: > > Am Dienstag, den 30.07.2019, 02:38 -0700 schrieb syzbot: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 41550654 [UPSTREAM] KVM: x86: degrade WARN to pr_warn_rate.. > > git tree: kmsan > > console output: https://syzkaller.appspot.com/x/log.txt?x=13e95183a00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 > > dashboard link: https://syzkaller.appspot.com/bug?extid=513e4d0985298538bf9b > > compiler: clang version 9.0.0 (/home/glider/llvm/clang > > 80fee25776c2fb61e74c1ecb1a523375c2500b69) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17eafa1ba00000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17b87983a00000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+513e4d0985298538bf9b@xxxxxxxxxxxxxxxxxxxxxxxxx > > #syz test: https://github.com/google/kasan.git 41550654 Hi Oliver, For KMSAN bugs you'll need to use the kmsan tree (syz test: https://github.com/google/kmsan.git COMMIT_ID). I've updated the testing instructions some time ago to reflect this. Sorry for the complexity, this is caused by USB fuzzing and KMSAN not being upstream yet. Thanks! > > From 6de76fa3df8aedc7a76dc0ecdea8308e38d4dccc Mon Sep 17 00:00:00 2001 > From: Oliver Neukum <oneukum@xxxxxxxx> > Date: Tue, 6 Aug 2019 14:41:52 +0200 > Subject: [PATCH] pcan_usb_fd: zero out the common command buffer > > Lest we leak kernel memory to a device we better zero out buffers. > > Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx> > --- > drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c > index 34761c3a6286..47cc1ff5b88e 100644 > --- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c > +++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c > @@ -841,7 +841,7 @@ static int pcan_usb_fd_init(struct peak_usb_device *dev) > goto err_out; > > /* allocate command buffer once for all for the interface */ > - pdev->cmd_buffer_addr = kmalloc(PCAN_UFD_CMD_BUFFER_SIZE, > + pdev->cmd_buffer_addr = kzalloc(PCAN_UFD_CMD_BUFFER_SIZE, > GFP_KERNEL); > if (!pdev->cmd_buffer_addr) > goto err_out_1; > -- > 2.16.4 > > > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/1565095525.8136.22.camel%40suse.com.
