general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] CPU: 0 PID: 302 Comm: udevd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:dummy_queue+0x1b7/0x870 drivers/usb/gadget/udc/dummy_hcd.c:712 Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 42 39 92 fe 4d 8b 24 24 49 83 c4 48 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 80 05 00 00 45 8b 24 24 44 89 e6 83 e6 02 RSP: 0018:ffffc900000071a0 EFLAGS: 00010206 RAX: 0000000000000009 RBX: ffff888100bb1210 RCX: dffffc0000000000 RDX: ffff88810c653b40 RSI: 0000000000000003 RDI: 0000000000000005 RBP: ffffc90000007218 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000e38 R12: 0000000000000048 R13: ffff888100bb1200 R14: 1ffff11020176240 R15: ffff88810b844c90 FS: 00007f07184a3880(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056181fa86b98 CR3: 000000010dd40000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: usb_ep_queue+0xce/0x210 drivers/usb/gadget/udc/core.c:290 eth_start_xmit+0x811/0xd40 drivers/usb/gadget/function/u_ether.c:588 __netdev_start_xmit include/linux/netdevice.h:4864 [inline] netdev_start_xmit include/linux/netdevice.h:4878 [inline] xmit_one net/core/dev.c:3606 [inline] dev_hard_start_xmit+0x245/0x680 net/core/dev.c:3622 sch_direct_xmit+0x26d/0x990 net/sched/sch_generic.c:339 qdisc_restart net/sched/sch_generic.c:404 [inline] __qdisc_run+0xa3a/0x1400 net/sched/sch_generic.c:412 qdisc_run+0x100/0x2f0 include/net/pkt_sched.h:126 __dev_xmit_skb net/core/dev.c:3817 [inline] __dev_queue_xmit+0xbc6/0x2500 net/core/dev.c:4173 dev_queue_xmit+0x17/0x20 net/core/dev.c:4254 neigh_hh_output include/net/neighbour.h:501 [inline] neigh_output include/net/neighbour.h:515 [inline] ip6_finish_output2+0xea9/0x1540 net/ipv6/ip6_output.c:130 __ip6_finish_output+0x5fd/0x790 net/ipv6/ip6_output.c:201 ip6_finish_output+0x33/0x1e0 net/ipv6/ip6_output.c:211 NF_HOOK_COND include/linux/netfilter.h:288 [inline] ip6_output+0x1fa/0x420 net/ipv6/ip6_output.c:234 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] mld_sendpack+0x61e/0xb00 net/ipv6/mcast.c:1676 mld_send_cr net/ipv6/mcast.c:1972 [inline] mld_ifc_timer_expire+0x862/0xc60 net/ipv6/mcast.c:2471 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450 expire_timers kernel/time/timer.c:1495 [inline] __run_timers+0x637/0x9a0 kernel/time/timer.c:1789 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:call_rcu+0xb58/0x1090 kernel/rcu/tree.c:3055 Code: 00 48 8b 05 da 81 07 05 49 03 04 24 49 39 c6 49 be 00 00 00 00 00 fc ff df 7f 60 48 8b 44 24 28 48 89 44 24 60 ff 74 24 60 9d <48> c7 84 24 80 00 00 00 0e 36 e0 45 48 8b 44 24 20 4a c7 04 30 00 RSP: 0018:ffffc90007997940 EFLAGS: 00000246 RAX: 0000000000000246 RBX: ffff8881f7057388 RCX: ffffffff8152047d RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881f7057388 RBP: ffffc90007997aa8 R08: ffff8881f705738f R09: 1ffff1103ee0ae71 R10: dffffc0000000000 R11: ffffed103ee0ae72 R12: ffff8881f7057398 R13: 1ffff1103ee0ae71 R14: dffffc0000000000 R15: 1ffff1103ee0ae73 security_inode_free+0xb4/0xd0 security/security.c:984 __destroy_inode+0x175/0x4f0 fs/inode.c:258 destroy_inode fs/inode.c:281 [inline] evict+0x7e8/0x940 fs/inode.c:629 iput_final fs/inode.c:1736 [inline] iput+0x654/0x7e0 fs/inode.c:1762 dentry_unlink_inode+0x2d5/0x390 fs/dcache.c:378 __dentry_kill+0x45b/0x660 fs/dcache.c:583 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x42/0x80 fs/dcache.c:883 do_renameat2+0x7f2/0xe50 fs/namei.c:4631 __do_sys_rename fs/namei.c:4678 [inline] __se_sys_rename fs/namei.c:4676 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:4676 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0718564cc7 Code: e8 5e a7 09 00 f7 d8 19 c0 5b c3 0f 1f 84 00 00 00 00 00 b8 ff ff ff ff 5b c3 66 0f 1f 84 00 00 00 00 00 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 01 61 17 00 f7 d8 64 89 02 b8 RSP: 002b:00007fff6bca3308 EFLAGS: 00000206 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 000056181f8ec5e0 RCX: 00007f0718564cc7 RDX: 000056181f5c3010 RSI: 00007fff6bca3320 RDI: 00007fff6bca3720 RBP: 000056181f805d40 R08: 00000000000001e0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff6bca3320 R13: 00007fff6bca3720 R14: 0000000000000000 R15: 000056181f804e20 Modules linked in: ---[ end trace 09c0247f21a8edb2 ]--- RIP: 0010:dummy_queue+0x1b7/0x870 drivers/usb/gadget/udc/dummy_hcd.c:712 Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 42 39 92 fe 4d 8b 24 24 49 83 c4 48 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 80 05 00 00 45 8b 24 24 44 89 e6 83 e6 02 RSP: 0018:ffffc900000071a0 EFLAGS: 00010206 RAX: 0000000000000009 RBX: ffff888100bb1210 RCX: dffffc0000000000 RDX: ffff88810c653b40 RSI: 0000000000000003 RDI: 0000000000000005 RBP: ffffc90000007218 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000e38 R12: 0000000000000048 R13: ffff888100bb1200 R14: 1ffff11020176240 R15: ffff88810b844c90 FS: 00007f07184a3880(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056181fa86b98 CR3: 000000010dd40000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fc cld 1: ff lcall (bad) 2: df 80 3c 08 00 74 filds 0x7400083c(%rax) 8: 08 4c 89 e7 or %cl,-0x19(%rcx,%rcx,4) c: e8 42 39 92 fe call 0xfe923953 11: 4d 8b 24 24 mov (%r12),%r12 15: 49 83 c4 48 add $0x48,%r12 19: 4c 89 e0 mov %r12,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 80 05 00 00 jne 0x5b6 36: 45 8b 24 24 mov (%r12),%r12d 3a: 44 89 e6 mov %r12d,%esi 3d: 83 e6 02 and $0x2,%esi