general protection fault, probably for non-canonical address 0xdffffc0020000046: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100000230-0x0000000100000237] CPU: 0 PID: 13059 Comm: syz-executor.5 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dev_hard_header include/linux/netdevice.h:3261 [inline] RIP: 0010:ipvlan_hard_header+0x75/0x150 drivers/net/ipvlan/ipvlan_main.c:380 Code: 48 8b ad a0 0c 00 00 0f 84 9f 00 00 00 e8 83 8b b2 fc 48 8d bd 38 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a7 00 00 00 48 8b 9d 38 02 00 00 48 85 db 74 67 RSP: 0018:ffffc90000007c78 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8880384a2000 RCX: 0000000000000100 RDX: 0000000020000046 RSI: ffffffff84c37fad RDI: 0000000100000237 RBP: 00000000ffffffff R08: ffff888072542028 R09: 000000000000000c R10: ffffffff873bc937 R11: 0000000000000000 R12: ffff888072542028 R13: ffff88808b963640 R14: ffffffff8d7067c8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2768cf1004 CR3: 0000000027281000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dev_hard_header include/linux/netdevice.h:3264 [inline] mrp_pdu_queue+0x202/0x350 net/802/mrp.c:351 mrp_join_timer+0x73/0xc0 net/802/mrp.c:605 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 1a 05 23 f8 48 89 ef e8 62 7b 23 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 13 3c 17 f8 65 8b 05 fc 97 c9 76 85 c0 74 0a 5b 5d c3 e8 b0 dc RSP: 0018:ffffc90004d9f520 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1adc8a9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffffff903dc358 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817c34f8 R11: 0000000000086089 R12: 000000000000000e R13: 000000000000000e R14: dead000000000100 R15: dffffc0000000000 __debug_check_no_obj_freed lib/debugobjects.c:1002 [inline] debug_check_no_obj_freed+0x20c/0x420 lib/debugobjects.c:1023 free_pages_prepare mm/page_alloc.c:1343 [inline] free_pcp_prepare+0x24e/0x780 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3394 release_pages+0x7e2/0x20b0 mm/swap.c:939 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249 zap_pte_range mm/memory.c:1432 [inline] zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0x1c58/0x2a10 mm/memory.c:1552 unmap_single_vma+0x198/0x310 mm/memory.c:1597 unmap_vmas+0x16d/0x2f0 mm/memory.c:1629 exit_mmap+0x1d0/0x630 mm/mmap.c:3171 __mmput+0x122/0x4b0 kernel/fork.c:1115 mmput+0x58/0x60 kernel/fork.c:1136 exit_mm kernel/exit.c:501 [inline] do_exit+0xabc/0x2a30 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4a351ce8d9 Code: Unable to access opcode bytes at RIP 0x7f4a351ce8af. RSP: 002b:00007f4a32745188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000033fe0 RBX: 00007f4a352d2f60 RCX: 00007f4a351ce8d9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007f4a35228cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfcae809f R14: 00007f4a32745300 R15: 0000000000022000 Modules linked in: ---[ end trace 573889453e2897b6 ]--- RIP: 0010:dev_hard_header include/linux/netdevice.h:3261 [inline] RIP: 0010:ipvlan_hard_header+0x75/0x150 drivers/net/ipvlan/ipvlan_main.c:380 Code: 48 8b ad a0 0c 00 00 0f 84 9f 00 00 00 e8 83 8b b2 fc 48 8d bd 38 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a7 00 00 00 48 8b 9d 38 02 00 00 48 85 db 74 67 RSP: 0018:ffffc90000007c78 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8880384a2000 RCX: 0000000000000100 RDX: 0000000020000046 RSI: ffffffff84c37fad RDI: 0000000100000237 RBP: 00000000ffffffff R08: ffff888072542028 R09: 000000000000000c R10: ffffffff873bc937 R11: 0000000000000000 R12: ffff888072542028 R13: ffff88808b963640 R14: ffffffff8d7067c8 R15: 000000000000000c FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2768cf1004 CR3: 0000000027281000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 8b ad a0 0c 00 00 mov 0xca0(%rbp),%rbp 7: 0f 84 9f 00 00 00 je 0xac d: e8 83 8b b2 fc callq 0xfcb28b95 12: 48 8d bd 38 02 00 00 lea 0x238(%rbp),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 a7 00 00 00 jne 0xdb 34: 48 8b 9d 38 02 00 00 mov 0x238(%rbp),%rbx 3b: 48 85 db test %rbx,%rbx 3e: 74 67 je 0xa7