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/kmsan.git 41550654 >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;
