Hello, syzbot found the following issue on: HEAD commit: 05a59d79 Merge git://git.kernel.org:/pub/scm/linux/kernel/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=164e6ba2d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=796675cee501159f dashboard link: https://syzkaller.appspot.com/bug?extid=636c58f40a86b4a879e7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111849ecd00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16037376d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+636c58f40a86b4a879e7@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888109985800 (size 2048): comm "kworker/1:1", pid 35, jiffies 4294966369 (age 27.230s) hex dump (first 32 bytes): ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00 ....1........... 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 ................ backtrace: [<000000004dfe56d1>] kmalloc include/linux/slab.h:554 [inline] [<000000004dfe56d1>] kzalloc include/linux/slab.h:684 [inline] [<000000004dfe56d1>] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582 [<00000000d2920859>] hub_port_connect drivers/usb/core/hub.c:5129 [inline] [<00000000d2920859>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<00000000d2920859>] port_event drivers/usb/core/hub.c:5509 [inline] [<00000000d2920859>] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810cec9900 (size 32): comm "kworker/1:1", pid 35, jiffies 4294966421 (age 26.710s) hex dump (first 32 bytes): 00 65 d0 10 81 88 ff ff 00 00 00 00 00 00 00 00 .e.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000008a69447c>] kmalloc include/linux/slab.h:559 [inline] [<000000008a69447c>] kzalloc include/linux/slab.h:684 [inline] [<000000008a69447c>] usb_get_configuration+0xce/0x1dd0 drivers/usb/core/config.c:887 [<00000000a636fc1f>] usb_enumerate_device drivers/usb/core/hub.c:2388 [inline] [<00000000a636fc1f>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2524 [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline] [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline] [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810b1b75c0 (size 32): comm "kworker/1:1", pid 35, jiffies 4294966448 (age 26.440s) hex dump (first 32 bytes): 73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00 syz............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline] [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025 [<00000000c372c0b9>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline] [<00000000c372c0b9>] usb_new_device+0x98/0x2e0 drivers/usb/core/hub.c:2524 [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline] [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline] [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810cec9800 (size 32): comm "kworker/1:1", pid 35, jiffies 4294966452 (age 26.400s) hex dump (first 32 bytes): 73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00 syz............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline] [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025 [<00000000b8074d2b>] usb_enumerate_device drivers/usb/core/hub.c:2399 [inline] [<00000000b8074d2b>] usb_new_device+0xae/0x2e0 drivers/usb/core/hub.c:2524 [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline] [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline] [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff88810cec9140 (size 32): comm "kworker/1:1", pid 35, jiffies 4294966456 (age 26.360s) hex dump (first 32 bytes): 73 79 7a 00 00 00 00 00 00 00 00 00 00 00 00 00 syz............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007889c4a2>] kmalloc include/linux/slab.h:559 [inline] [<000000007889c4a2>] usb_cache_string+0x8a/0xf0 drivers/usb/core/message.c:1025 [<000000002dd0377f>] usb_enumerate_device drivers/usb/core/hub.c:2401 [inline] [<000000002dd0377f>] usb_new_device+0xc4/0x2e0 drivers/usb/core/hub.c:2524 [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline] [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline] [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 BUG: memory leak unreferenced object 0xffff8881101a8800 (size 256): comm "kworker/1:1", pid 35, jiffies 4294966459 (age 26.330s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 88 1a 10 81 88 ff ff ................ 08 88 1a 10 81 88 ff ff 30 23 5e 82 ff ff ff ff ........0#^..... backtrace: [<000000002a4ba0cb>] kmalloc include/linux/slab.h:554 [inline] [<000000002a4ba0cb>] kzalloc include/linux/slab.h:684 [inline] [<000000002a4ba0cb>] device_private_init drivers/base/core.c:3084 [inline] [<000000002a4ba0cb>] device_add+0x811/0xc40 drivers/base/core.c:3134 [<00000000440fa047>] usb_new_device.cold+0x16a/0x582 drivers/usb/core/hub.c:2555 [<0000000024685ce9>] hub_port_connect drivers/usb/core/hub.c:5223 [inline] [<0000000024685ce9>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [<0000000024685ce9>] port_event drivers/usb/core/hub.c:5509 [inline] [<0000000024685ce9>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591 [<0000000099d99129>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [<00000000a83d9aee>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [<00000000aaaf0fda>] kthread+0x178/0x1b0 kernel/kthread.c:292 [<00000000d2888c70>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
