BUG: sleeping function called from invalid context at drivers/usb/core/urb.c:705 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 2856, name: udevd preempt_count: 101, expected: 0 RCU nest depth: 1, expected: 0 no locks held by udevd/2856. irq event stamp: 7459413 hardirqs last enabled at (7459412): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (7459412): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (7459413): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:130 [inline] hardirqs last disabled at (7459413): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (7459354): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (7459354): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (7459354): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 softirqs last disabled at (7459409): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (7459409): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (7459409): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 UID: 0 PID: 2856 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:8888 usb_kill_urb+0x8e/0x320 drivers/usb/core/urb.c:705 usb_tx_block+0x91/0x320 drivers/net/wireless/marvell/libertas/if_usb.c:429 if_usb_send_fw_pkt.isra.0+0x2e4/0x550 drivers/net/wireless/marvell/libertas/if_usb.c:366 if_usb_receive_fwload+0x5d3/0x780 drivers/net/wireless/marvell/libertas/if_usb.c:592 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741 dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x50e/0xa70 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1866 handle_softirqs+0x1de/0x9d0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline] RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x60/0xc0 kernel/rcu/tree.c:752 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 75 5c 48 03 1c ed e0 ab 1a 89 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 24 8b 03 c1 e8 02 RSP: 0018:ffffc9000152f4c8 EFLAGS: 00000a06 RAX: dffffc0000000000 RBX: ffff8881f5733968 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff87afd2a0 RDI: ffffffff891aabe8 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000200 R11: 0000000000009d3a R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x317/0x380 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xd1/0x1ea0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2685 [inline] slab_free mm/slub.c:6165 [inline] kmem_cache_free+0x105/0x640 mm/slub.c:6295 kfree_skbmem+0x19a/0x210 net/core/skbuff.c:1151 __kfree_skb net/core/skbuff.c:1218 [inline] consume_skb net/core/skbuff.c:1450 [inline] consume_skb+0xd1/0x110 net/core/skbuff.c:1444 netlink_recvmsg+0x51b/0x9c0 net/netlink/af_netlink.c:1972 sock_recvmsg_nosec net/socket.c:1078 [inline] sock_recvmsg+0x1a4/0x1f0 net/socket.c:1100 ____sys_recvmsg+0x218/0x640 net/socket.c:2812 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2854 __sys_recvmsg+0x16d/0x220 net/socket.c:2887 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0x7b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fca133f8407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007fff087a1c90 EFLAGS: 00000202 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fca1330a880 RCX: 00007fca133f8407 RDX: 0000000000000000 RSI: 00007fff087a1d20 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00005557e9b03d80 R13: 00007fff087a1de0 R14: 00007fff087a1d2c R15: 0000000000000000 BUG: scheduling while atomic: udevd/2856/0x00000102 no locks held by udevd/2856. Modules linked in: irq event stamp: 7459413 hardirqs last enabled at (7459412): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (7459412): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (7459413): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:130 [inline] hardirqs last disabled at (7459413): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (7459354): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (7459354): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (7459354): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 softirqs last disabled at (7459409): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (7459409): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (7459409): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 Preemption disabled at: [<0000000000000000>] 0x0 ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 75 5c jne 0x69 d: 48 03 1c ed e0 ab 1a add -0x76e55420(,%rbp,8),%rbx 14: 89 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 da mov %rbx,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx * 2a: 48 89 d8 mov %rbx,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 d0 cmp %dl,%al 35: 7c 04 jl 0x3b 37: 84 d2 test %dl,%dl 39: 75 24 jne 0x5f 3b: 8b 03 mov (%rbx),%eax 3d: c1 e8 02 shr $0x2,%eax