Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 17938 Comm: syz.1.4297 Not tainted 6.10.0-syzkaller-04472-g51835949dda3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__dev_flush+0x5b/0x160 Code: 48 89 ef e8 67 79 3a 00 48 8b 5d 00 48 39 eb 0f 84 ff 00 00 00 48 89 2c 24 49 89 dd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 48 89 df e8 35 79 3a 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000007af0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff888027630000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffc900099ef810 RBP: ffffc900099ef810 R08: ffffffff895c373a R09: 1ffffffff1f5a16d R10: dffffc0000000000 R11: fffffbfff1f5a16e R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900099ef810 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556a5b85c8 CR3: 0000000022e44000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xdp_do_check_flushed+0x129/0x240 net/core/filter.c:4300 __napi_poll+0xe4/0x490 net/core/dev.c:6774 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 common_interrupt+0xaa/0xd0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:stack_not_used include/linux/sched/task_stack.h:108 [inline] RIP: 0010:check_stack_usage kernel/exit.c:782 [inline] RIP: 0010:do_exit+0x1d30/0x27f0 kernel/exit.c:920 Code: 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 cc 9f 00 48 8b 1b 41 bc 08 00 00 00 4a 8d 3c 23 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 24 cc 9f 00 4a 83 3c 23 00 75 0b e8 58 de RSP: 0018:ffffc900099efac0 EFLAGS: 00000a02 RAX: 1ffff9200133dc13 RBX: ffffc900099e8000 RCX: ffff888027630000 RDX: 0000000000000000 RSI: ffffffff8bcadaa0 RDI: ffffc900099ee098 RBP: ffffc900099efc20 R08: ffffffff8fad0b6f R09: 1ffffffff1f5a16d R10: dffffc0000000000 R11: fffffbfff1f5a16e R12: 0000000000006098 R13: 1ffff11004ec60c4 R14: 0000000000000000 R15: dffffc0000000000 do_group_exit+0x207/0x2c0 kernel/exit.c:1026 get_signal+0x16a1/0x1740 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f552a975a99 Code: Unable to access opcode bytes at 0x7f552a975a6f. RSP: 002b:00007f552b7ef0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f552ab04118 RCX: 00007f552a975a99 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f552ab04118 RBP: 00007f552ab04110 R08: 00007f552b7ef6c0 R09: 00007f552b7ef6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f552ab0411c R13: 000000000000006e R14: 00007ffc8efcddd0 R15: 00007ffc8efcdeb8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__dev_flush+0x5b/0x160 Code: 48 89 ef e8 67 79 3a 00 48 8b 5d 00 48 39 eb 0f 84 ff 00 00 00 48 89 2c 24 49 89 dd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 48 89 df e8 35 79 3a 00 48 8b 03 48 89 44 RSP: 0018:ffffc90000007af0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff888027630000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffc900099ef810 RBP: ffffc900099ef810 R08: ffffffff895c373a R09: 1ffffffff1f5a16d R10: dffffc0000000000 R11: fffffbfff1f5a16e R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900099ef810 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556a5b85c8 CR3: 0000000022e44000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 ef mov %rbp,%rdi 3: e8 67 79 3a 00 call 0x3a796f 8: 48 8b 5d 00 mov 0x0(%rbp),%rbx c: 48 39 eb cmp %rbp,%rbx f: 0f 84 ff 00 00 00 je 0x114 15: 48 89 2c 24 mov %rbp,(%rsp) 19: 49 89 dd mov %rbx,%r13 1c: 49 c1 ed 03 shr $0x3,%r13 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 41 80 7c 05 00 00 cmpb $0x0,0x0(%r13,%rax,1) <-- trapping instruction 30: 74 08 je 0x3a 32: 48 89 df mov %rbx,%rdi 35: e8 35 79 3a 00 call 0x3a796f 3a: 48 8b 03 mov (%rbx),%rax 3d: 48 rex.W 3e: 89 .byte 0x89 3f: 44 rex.R