On Tue, Dec 27, 2016 at 12:40 PM, Felipe Balbi <balbi@xxxxxxxxxx> wrote: > > Hi, > > Andrey Konovalov <andreyknvl@xxxxxxxxxx> writes: >> Hi! >> >> I've got the following error report while running the syzkaller fuzzer. >> >> On commit 3c49de52d5647cda8b42c4255cf8a29d1e22eff5 (Dec 2). >> >> WARNING: CPU: 0 PID: 5257 at drivers/usb/gadget/udc/dummy_hcd.c:672 >> dummy_free_request+0x153/0x170 >> Kernel panic - not syncing: panic_on_warn set ... >> >> usb 2-1: string descriptor 0 read error: -71 >> usb 2-1: New USB device found, idVendor=0000, idProduct=0000 >> usb 2-1: New USB device strings: Mfr=0, Product=170, SerialNumber=0 >> CPU: 0 PID: 5257 Comm: syz-executor0 Not tainted 4.9.0-rc7+ #16 >> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 >> ffff88006af0ec48 ffffffff81f96aba ffffffff00000200 1ffff1000d5e1d1c >> ffffed000d5e1d14 0000000000000a06 0000000041b58ab3 ffffffff8598b4c8 >> ffffffff81f96828 0000000041b58ab3 ffffffff85942a10 ffffffff81432790 >> Call Trace: >> [< inline >] __dump_stack lib/dump_stack.c:15 >> [<ffffffff81f96aba>] dump_stack+0x292/0x398 lib/dump_stack.c:51 >> [<ffffffff8168c7be>] panic+0x1cb/0x3a9 kernel/panic.c:179 >> [<ffffffff812b80b4>] __warn+0x1c4/0x1e0 kernel/panic.c:542 >> [<ffffffff812b831c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 >> [<ffffffff830fcac3>] dummy_free_request+0x153/0x170 >> drivers/usb/gadget/udc/dummy_hcd.c:672 >> [<ffffffff830ed160>] usb_ep_free_request+0xc0/0x420 >> drivers/usb/gadget/udc/core.c:195 >> [<ffffffff83224fe1>] gadgetfs_unbind+0x131/0x190 >> drivers/usb/gadget/legacy/inode.c:1612 >> [<ffffffff830ebcbf>] usb_gadget_remove_driver+0x10f/0x2b0 >> drivers/usb/gadget/udc/core.c:1228 >> [<ffffffff830ec016>] usb_gadget_unregister_driver+0x1b6/0x2c0 >> drivers/usb/gadget/udc/core.c:1357 >> [<ffffffff83224650>] dev_release+0x80/0x160 >> drivers/usb/gadget/legacy/inode.c:1187 >> [<ffffffff81805852>] __fput+0x332/0x7f0 fs/file_table.c:208 >> [<ffffffff81805d95>] ____fput+0x15/0x20 fs/file_table.c:244 >> [<ffffffff81338b9b>] task_work_run+0x19b/0x270 kernel/task_work.c:116 >> [< inline >] exit_task_work include/linux/task_work.h:21 >> [<ffffffff812c7eca>] do_exit+0x16aa/0x2530 kernel/exit.c:828 >> [<ffffffff812cd749>] do_group_exit+0x149/0x420 kernel/exit.c:932 >> [<ffffffff812faa9d>] get_signal+0x76d/0x17b0 kernel/signal.c:2307 >> [<ffffffff811cfee2>] do_signal+0xd2/0x2120 arch/x86/kernel/signal.c:807 >> [<ffffffff81003d00>] exit_to_usermode_loop+0x170/0x200 >> arch/x86/entry/common.c:156 >> [< inline >] prepare_exit_to_usermode arch/x86/entry/common.c:190 >> [<ffffffff81007293>] syscall_return_slowpath+0x3d3/0x420 >> arch/x86/entry/common.c:259 >> [<ffffffff84f47f62>] entry_SYSCALL_64_fastpath+0xc0/0xc2 >> Dumping ftrace buffer: >> (ftrace buffer empty) >> Kernel Offset: disabled > > There have been several emails like this one. Can you check if > my branch testing/fixes is working for you? Hi Felipe, This was fixed by Alan with the "USB: dummy-hcd: fix bug in stop_activity (handle ep0)" patch. Thanks! > > -- > balbi > > -- > You received this message because you are subscribed to the Google Groups "syzkaller" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller+unsubscribe@xxxxxxxxxxxxxxxx. > For more options, visit https://groups.google.com/d/optout. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
