Hi Syzbot, On 4/14/22 21:47, syzbot wrote:
Hello, syzbot found the following issue on: HEAD commit: 4ea3c6425269 Merge tag 'powerpc-5.18-2' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=148cb824f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=307baecfd5e87ced dashboard link: https://syzkaller.appspot.com/bug?extid=1a247e36149ffd709a9b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17279a70f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121dc124f00000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=142753df700000 final oops: https://syzkaller.appspot.com/x/report.txt?x=162753df700000 console output: https://syzkaller.appspot.com/x/log.txt?x=122753df700000 IMPORTANT: if you fix the issue, please add the following tag to the commit:
just guessing #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master With regards, Pavel Skripkin
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c index cd7b118d5929..2a1a0a0ca225 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c @@ -2569,6 +2569,9 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf, } while (0); mutex_unlock(&pvr2_unit_mtx); + if (hdw->unit_number == -1) + goto fail; + cnt1 = 0; cnt2 = scnprintf(hdw->name+cnt1,sizeof(hdw->name)-cnt1,"pvrusb2"); cnt1 += cnt2;
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