Hi! While running the syzkaller fuzzer I've got the following error report. On commit 3c49de52d5647cda8b42c4255cf8a29d1e22eff5 (Dev 2). WARNING: CPU: 2 PID: 865 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x8a/0xa0 gadgetfs: disconnected sysfs: cannot create duplicate filename '/devices/platform/dummy_hcd.0/usb2/2-1/2-1:64.0/ep_05' Kernel panic - not syncing: panic_on_warn set ... CPU: 2 PID: 865 Comm: kworker/2:1 Not tainted 4.9.0-rc7+ #34 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: usb_hub_wq hub_event ffff88006bee64c8 ffffffff81f96b8a ffffffff00000001 1ffff1000d7dcc2c ffffed000d7dcc24 0000000000000001 0000000041b58ab3 ffffffff8598b510 ffffffff81f968f8 ffffffff850fee20 ffffffff85cff020 dffffc0000000000 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81f96b8a>] dump_stack+0x292/0x398 lib/dump_stack.c:51 [<ffffffff8168c88e>] panic+0x1cb/0x3a9 kernel/panic.c:179 [<ffffffff812b80b4>] __warn+0x1c4/0x1e0 kernel/panic.c:542 [<ffffffff812b8195>] warn_slowpath_fmt+0xc5/0x110 kernel/panic.c:565 [<ffffffff819e70ca>] sysfs_warn_dup+0x8a/0xa0 fs/sysfs/dir.c:30 [<ffffffff819e7308>] sysfs_create_dir_ns+0x178/0x1d0 fs/sysfs/dir.c:59 [< inline >] create_dir lib/kobject.c:71 [<ffffffff81fa1b07>] kobject_add_internal+0x227/0xa60 lib/kobject.c:229 [< inline >] kobject_add_varg lib/kobject.c:366 [<ffffffff81fa2479>] kobject_add+0x139/0x220 lib/kobject.c:411 [<ffffffff82737a63>] device_add+0x353/0x1660 drivers/base/core.c:1088 [<ffffffff82738d8d>] device_register+0x1d/0x20 drivers/base/core.c:1206 [<ffffffff82cb77d3>] usb_create_ep_devs+0x163/0x260 drivers/usb/core/endpoint.c:195 [<ffffffff82c9f27b>] create_intf_ep_devs+0x13b/0x200 drivers/usb/core/message.c:1030 [<ffffffff82ca39d3>] usb_set_configuration+0x1083/0x18d0 drivers/usb/core/message.c:1937 [<ffffffff82cc9e2e>] generic_probe+0x6e/0xe0 drivers/usb/core/generic.c:172 [<ffffffff82caa7fa>] usb_probe_device+0xaa/0xe0 drivers/usb/core/driver.c:263 [< inline >] really_probe drivers/base/dd.c:375 [<ffffffff82741f64>] driver_probe_device+0x514/0x980 drivers/base/dd.c:515 [<ffffffff827427bb>] __device_attach_driver+0x22b/0x290 drivers/base/dd.c:610 [<ffffffff8273b56c>] bus_for_each_drv+0x15c/0x200 drivers/base/bus.c:463 [<ffffffff82741776>] __device_attach+0x266/0x3c0 drivers/base/dd.c:667 [<ffffffff827428ba>] device_initial_probe+0x1a/0x20 drivers/base/dd.c:714 [<ffffffff8273edb6>] bus_probe_device+0x1e6/0x290 drivers/base/bus.c:557 [<ffffffff82738416>] device_add+0xd06/0x1660 drivers/base/core.c:1136 [<ffffffff82c8066f>] usb_new_device+0x9af/0x1e80 drivers/usb/core/hub.c:2508 [< inline >] hub_port_connect drivers/usb/core/hub.c:4891 [< inline >] hub_port_connect_change drivers/usb/core/hub.c:4996 [< inline >] port_event drivers/usb/core/hub.c:5102 [<ffffffff82c84fe9>] hub_event+0x1689/0x36d0 drivers/usb/core/hub.c:5182 [<ffffffff8132743a>] process_one_work+0xb2a/0x1aa0 kernel/workqueue.c:2096 [<ffffffff813285bf>] worker_thread+0x20f/0x18a0 kernel/workqueue.c:2230 [<ffffffff8133ebf3>] kthread+0x323/0x3e0 kernel/kthread.c:209 [<ffffffff84f4812a>] ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:433 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled -- 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
