Hello, syzbot found the following issue on: HEAD commit: 3f12222a4beb usb: dwc3: core: Fix compile warning on s390 .. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=12dee6d8980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6fe204286ac73e15 dashboard link: https://syzkaller.appspot.com/bug?extid=2660b9135e6144ca41a5 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=127fb7bb180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118eeccf180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/25a4e2e32205/disk-3f12222a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e02cf02ad7b9/vmlinux-3f12222a.xz kernel image: https://storage.googleapis.com/syzbot-assets/41deb6e53302/bzImage-3f12222a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2660b9135e6144ca41a5@xxxxxxxxxxxxxxxxxxxxxxxxx usb 1-1: reg 0xfe64, usbctrl_vendorreq TimeOut! status:0xffffffb9 value=0x0 reqtype=0xc0 rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 0 rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin usb 1-1: USB disconnect, device number 2 INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 PID: 589 Comm: kworker/0:2 Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 assign_lock_key kernel/locking/lockdep.c:976 [inline] register_lock_class+0xc2a/0x1230 kernel/locking/lockdep.c:1289 __lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 skb_dequeue+0x20/0x180 net/core/skbuff.c:3835 rtl_usb_cleanup drivers/net/wireless/realtek/rtlwifi/usb.c:706 [inline] rtl_usb_deinit drivers/net/wireless/realtek/rtlwifi/usb.c:721 [inline] rtl_usb_disconnect+0x49e/0x830 drivers/net/wireless/realtek/rtlwifi/usb.c:1051 usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:568 [inline] device_remove+0x122/0x170 drivers/base/dd.c:560 __device_release_driver drivers/base/dd.c:1270 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1293 bus_remove_device+0x22f/0x420 drivers/base/bus.c:574 device_del+0x396/0xa10 drivers/base/core.c:3909 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2305 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1be4/0x4f50 drivers/usb/core/hub.c:5903 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> BUG: unable to handle page fault for address: ffffffffffffffd8 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 82a2067 P4D 82a2067 PUD 82a4067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN PTI CPU: 0 PID: 589 Comm: kworker/0:2 Not tainted 6.9.0-rc5-syzkaller-00105-g3f12222a4beb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:arch_atomic_fetch_add arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:raw_atomic_fetch_add_relaxed include/linux/atomic/atomic-arch-fallback.h:749 [inline] RIP: 0010:atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:253 [inline] RIP: 0010:__refcount_add include/linux/refcount.h:184 [inline] RIP: 0010:__refcount_inc include/linux/refcount.h:241 [inline] RIP: 0010:refcount_inc include/linux/refcount.h:258 [inline] RIP: 0010:kref_get include/linux/kref.h:45 [inline] RIP: 0010:usb_get_urb.part.0+0x1c/0x90 drivers/usb/core/urb.c:114 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 fd 53 bb 01 00 00 00 e8 81 19 2d fd be 04 00 00 00 48 89 ef e8 d4 02 7f fd <f0> 0f c1 5d 00 31 ff 89 de e8 46 14 2d fd 85 db 74 47 e8 5d 19 2d RSP: 0018:ffffc900019cf6b0 EFLAGS: 00010046 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8425b71c RDX: fffffbfffffffffc RSI: 0000000000000004 RDI: ffffffffffffffd8 RBP: ffffffffffffffd8 R08: 0000000000000001 R09: fffffbfffffffffb R10: ffffffffffffffdb R11: 0000000000000001 R12: ffff888118830228 R13: ffffffffffffffd8 R14: ffff888118830288 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd8 CR3: 0000000116906000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> usb_get_urb drivers/usb/core/urb.c:816 [inline] usb_kill_anchored_urbs+0xa5/0x380 drivers/usb/core/urb.c:819 rtl_usb_cleanup drivers/net/wireless/realtek/rtlwifi/usb.c:713 [inline] rtl_usb_deinit drivers/net/wireless/realtek/rtlwifi/usb.c:721 [inline] rtl_usb_disconnect+0x4d1/0x830 drivers/net/wireless/realtek/rtlwifi/usb.c:1051 usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:568 [inline] device_remove+0x122/0x170 drivers/base/dd.c:560 __device_release_driver drivers/base/dd.c:1270 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1293 bus_remove_device+0x22f/0x420 drivers/base/bus.c:574 device_del+0x396/0xa10 drivers/base/core.c:3909 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2305 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1be4/0x4f50 drivers/usb/core/hub.c:5903 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: CR2: ffffffffffffffd8 ---[ end trace 0000000000000000 ]--- RIP: 0010:arch_atomic_fetch_add arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:raw_atomic_fetch_add_relaxed include/linux/atomic/atomic-arch-fallback.h:749 [inline] RIP: 0010:atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:253 [inline] RIP: 0010:__refcount_add include/linux/refcount.h:184 [inline] RIP: 0010:__refcount_inc include/linux/refcount.h:241 [inline] RIP: 0010:refcount_inc include/linux/refcount.h:258 [inline] RIP: 0010:kref_get include/linux/kref.h:45 [inline] RIP: 0010:usb_get_urb.part.0+0x1c/0x90 drivers/usb/core/urb.c:114 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 fd 53 bb 01 00 00 00 e8 81 19 2d fd be 04 00 00 00 48 89 ef e8 d4 02 7f fd <f0> 0f c1 5d 00 31 ff 89 de e8 46 14 2d fd 85 db 74 47 e8 5d 19 2d RSP: 0018:ffffc900019cf6b0 EFLAGS: 00010046 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8425b71c RDX: fffffbfffffffffc RSI: 0000000000000004 RDI: ffffffffffffffd8 RBP: ffffffffffffffd8 R08: 0000000000000001 R09: fffffbfffffffffb R10: ffffffffffffffdb R11: 0000000000000001 R12: ffff888118830228 R13: ffffffffffffffd8 R14: ffff888118830288 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd8 CR3: 0000000116906000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 55 push %rbp f: 48 89 fd mov %rdi,%rbp 12: 53 push %rbx 13: bb 01 00 00 00 mov $0x1,%ebx 18: e8 81 19 2d fd call 0xfd2d199e 1d: be 04 00 00 00 mov $0x4,%esi 22: 48 89 ef mov %rbp,%rdi 25: e8 d4 02 7f fd call 0xfd7f02fe * 2a: f0 0f c1 5d 00 lock xadd %ebx,0x0(%rbp) <-- trapping instruction 2f: 31 ff xor %edi,%edi 31: 89 de mov %ebx,%esi 33: e8 46 14 2d fd call 0xfd2d147e 38: 85 db test %ebx,%ebx 3a: 74 47 je 0x83 3c: e8 .byte 0xe8 3d: 5d pop %rbp 3e: 19 .byte 0x19 3f: 2d .byte 0x2d --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
