BUG: sleeping function called from invalid context at drivers/usb/core/urb.c:705 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 2857, name: udevd preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 1 lock held by udevd/2857: #0: ffff888116441f68 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x255/0xc30 net/unix/af_unix.c:2570 irq event stamp: 1964549 hardirqs last enabled at (1964548): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (1964548): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (1964549): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:130 [inline] hardirqs last disabled at (1964549): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1964500): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1964500): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1964500): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 softirqs last disabled at (1964543): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1964543): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1964543): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:463 [inline] [] handle_softirqs+0xf5/0x9d0 kernel/softirq.c:598 CPU: 1 UID: 0 PID: 2857 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:lock_release+0x19e/0x320 kernel/locking/lockdep.c:5893 Code: ff 65 0f c1 05 6b d5 66 0b 83 f8 01 0f 85 3d 01 00 00 9c 58 f6 c4 02 0f 85 28 01 00 00 41 f7 c6 00 02 00 00 0f 85 de 00 00 00 <48> 8b 44 24 10 65 48 2b 05 1d 91 66 0b 0f 85 63 01 00 00 48 83 c4 RSP: 0018:ffffc9000174f478 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffffffff896de760 RCX: ffffc9000174f484 RDX: 0000000000000001 RSI: ffffffff890036c1 RDI: ffffffff87afd320 RBP: ffffffff816f880e R08: 0000000000000001 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000054616 R12: ffff888117a09d80 R13: ffffc9000174f530 R14: 0000000000000202 R15: 0000000000000002 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x3c3/0x1ea0 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 __unix_dgram_recvmsg+0x754/0xc30 net/unix/af_unix.c:2655 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2672 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: 0033:0x7ff3674fc407 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:00007ffedf4d72b0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007ff36740e880 RCX: 00007ff3674fc407 RDX: 0000000000000040 RSI: 00007ffedf4d73d0 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 000055f0e7be3100 R14: 0000000000000000 R15: 0000000000000000 BUG: scheduling while atomic: udevd/2857/0x00000101 1 lock held by udevd/2857: #0: ffff888116441f68 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x255/0xc30 net/unix/af_unix.c:2570 Modules linked in: irq event stamp: 1964549 hardirqs last enabled at (1964548): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (1964548): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (1964549): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:130 [inline] hardirqs last disabled at (1964549): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1964500): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1964500): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1964500): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 softirqs last disabled at (1964543): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1964543): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1964543): [] __irq_exit_rcu+0xed/0x150 kernel/softirq.c:723 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:463 [inline] [] handle_softirqs+0xf5/0x9d0 kernel/softirq.c:598 ---------------- Code disassembly (best guess): 0: ff 65 0f jmp *0xf(%rbp) 3: c1 05 6b d5 66 0b 83 roll $0x83,0xb66d56b(%rip) # 0xb66d575 a: f8 clc b: 01 0f add %ecx,(%rdi) d: 85 3d 01 00 00 9c test %edi,-0x63ffffff(%rip) # 0x9c000014 13: 58 pop %rax 14: f6 c4 02 test $0x2,%ah 17: 0f 85 28 01 00 00 jne 0x145 1d: 41 f7 c6 00 02 00 00 test $0x200,%r14d 24: 0f 85 de 00 00 00 jne 0x108 * 2a: 48 8b 44 24 10 mov 0x10(%rsp),%rax <-- trapping instruction 2f: 65 48 2b 05 1d 91 66 sub %gs:0xb66911d(%rip),%rax # 0xb669154 36: 0b 37: 0f 85 63 01 00 00 jne 0x1a0 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c4 .byte 0xc4