Hello, syzbot found the following issue on: HEAD commit: bdf56c7580d2 Merge tag 'slab-for-6.12' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=131524a9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=b82e97dfbc92f0 dashboard link: https://syzkaller.appspot.com/bug?extid=e5388ea6d2de83957e35 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b415ca186bb1/disk-bdf56c75.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4ce89ea52bab/vmlinux-bdf56c75.xz kernel image: https://storage.googleapis.com/syzbot-assets/9f99c9bf1bec/bzImage-bdf56c75.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e5388ea6d2de83957e35@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in __skb_set_length include/linux/skbuff.h:3190 [inline] BUG: KMSAN: uninit-value in ath9k_hif_usb_reg_in_cb+0x84d/0x9b0 drivers/net/wireless/ath/ath9k/hif_usb.c:756 __skb_set_length include/linux/skbuff.h:3190 [inline] ath9k_hif_usb_reg_in_cb+0x84d/0x9b0 drivers/net/wireless/ath/ath9k/hif_usb.c:756 __usb_hcd_giveback_urb+0x572/0x840 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x157/0x720 drivers/usb/core/hcd.c:1734 dummy_timer+0xd3f/0x6aa0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1691 [inline] __hrtimer_run_queues+0x564/0xe40 kernel/time/hrtimer.c:1755 hrtimer_interrupt+0x3ab/0x1490 kernel/time/hrtimer.c:1817 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline] __sysvec_apic_timer_interrupt+0xa6/0x3a0 arch/x86/kernel/apic/apic.c:1043 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0x7e/0x90 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x33/0x60 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] dummy_pullup+0x273/0x320 drivers/usb/gadget/udc/dummy_hcd.c:924 usb_gadget_disconnect_locked+0x1f8/0x5b0 drivers/usb/gadget/udc/core.c:777 gadget_unbind_driver+0xe6/0x5f0 drivers/usb/gadget/udc/core.c:1666 device_remove drivers/base/dd.c:566 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x58a/0x990 drivers/base/dd.c:1295 driver_detach+0x360/0x540 drivers/base/dd.c:1358 bus_remove_driver+0x465/0x500 drivers/base/bus.c:742 driver_unregister+0x8d/0x100 drivers/base/driver.c:274 usb_gadget_unregister_driver+0x55/0xa0 drivers/usb/gadget/udc/core.c:1731 raw_release+0x1bc/0x400 drivers/usb/gadget/legacy/raw_gadget.c:462 __fput+0x32c/0x1120 fs/file_table.c:431 ____fput+0x25/0x30 fs/file_table.c:459 task_work_run+0x268/0x310 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x170 kernel/entry/common.c:218 do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4725 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2263 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2343 alloc_slab_page mm/slub.c:2413 [inline] allocate_slab+0x320/0x12c0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0x12ef/0x35e0 mm/slub.c:3819 __slab_alloc mm/slub.c:3909 [inline] __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] kmem_cache_alloc_noprof+0x57a/0xb20 mm/slub.c:4142 skb_clone+0x303/0x550 net/core/skbuff.c:2084 dev_queue_xmit_nit+0x4d0/0x12a0 net/core/dev.c:2315 xmit_one net/core/dev.c:3584 [inline] dev_hard_start_xmit+0x17d/0xa20 net/core/dev.c:3604 __dev_queue_xmit+0x3576/0x55e0 net/core/dev.c:4424 dev_queue_xmit include/linux/netdevice.h:3094 [inline] neigh_connected_output+0x5a0/0x690 net/core/neighbour.c:1594 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x2347/0x2ba0 net/ipv6/ip6_output.c:141 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline] ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x356/0x620 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb9f/0x14c0 net/ipv6/ndisc.c:511 ndisc_send_rs+0x97e/0xae0 net/ipv6/ndisc.c:721 addrconf_rs_timer+0x488/0x6f0 net/ipv6/addrconf.c:4042 call_timer_fn+0x49/0x580 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x84e/0xe90 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2449 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0x68/0x120 kernel/softirq.c:637 irq_exit_rcu+0x12/0x20 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 CPU: 0 UID: 0 PID: 7385 Comm: syz.1.489 Tainted: G W 6.11.0-syzkaller-04744-gbdf56c7580d2 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ===================================================== --- 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 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
