BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0001) - permissions violation PGD 6812067 P4D 6812067 PUD 6814067 PMD 6816067 PTE 8000000006809165 Oops: 0001 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16996 Comm: syz-executor.2 Tainted: G W 5.15.148-syzkaller-00013-gad06eaf051cd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:copy_from_kernel_nofault+0x86/0x2e0 mm/maccess.c:37 Code: 48 89 55 d0 0f 85 ea 01 00 00 ff 02 bf 07 00 00 00 4c 89 ee e8 fb 98 d6 ff 49 83 fd 07 76 5c 4d 89 fe 49 83 c5 f8 49 83 c7 08 <49> 8b 1c 24 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 RSP: 0018:ffffc90000bf76d0 EFLAGS: 00010292 RAX: 0000000000000002 RBX: 00007ffffffff000 RCX: ffff88810c3413c0 RDX: ffff88810c341f50 RSI: 0000000000000008 RDI: 0000000000000007 RBP: ffffc90000bf7708 R08: ffffffff81998d75 R09: ffffed1021868279 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffffff600000 R13: 0000000000000000 R14: ffffc90000bf7768 R15: ffffc90000bf7770 FS: 00007f1bfb1626c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 00000001019ad000 CR4: 00000000003506a0 Call Trace: bpf_probe_read_kernel_common kernel/trace/bpf_trace.c:220 [inline] ____bpf_probe_read_compat kernel/trace/bpf_trace.c:284 [inline] bpf_probe_read_compat+0x112/0x180 kernel/trace/bpf_trace.c:277 bpf_prog_baa065642a502c00+0x64/0x944 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline] __bpf_prog_run include/linux/filter.h:625 [inline] bpf_prog_run include/linux/filter.h:632 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline] bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1921 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline] kmem_cache_free+0x2c3/0x2e0 mm/slub.c:3536 kfree_skbmem+0x104/0x170 __kfree_skb net/core/skbuff.c:758 [inline] kfree_skb_reason net/core/skbuff.c:778 [inline] kfree_skb+0xc2/0x360 net/core/skbuff.c:792 tun_get_user+0x119b/0x3aa0 drivers/net/tun.c:1842 tun_chr_write_iter+0x1e1/0x2e0 drivers/net/tun.c:2018 call_write_iter include/linux/fs.h:2202 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xd5d/0x1110 fs/read_write.c:594 ksys_write+0x199/0x2c0 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1bfc3eeea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1bfb1620c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1bfc51cf80 RCX: 00007f1bfc3eeea9 RDX: 0000000000000240 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f1bfc43b4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f1bfc51cf80 R15: 00007ffce54d4b68 Modules linked in: CR2: ffffffffff600000 ---[ end trace d4da3d3bdab3e83b ]--- RIP: 0010:copy_from_kernel_nofault+0x86/0x2e0 mm/maccess.c:37 Code: 48 89 55 d0 0f 85 ea 01 00 00 ff 02 bf 07 00 00 00 4c 89 ee e8 fb 98 d6 ff 49 83 fd 07 76 5c 4d 89 fe 49 83 c5 f8 49 83 c7 08 <49> 8b 1c 24 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 RSP: 0018:ffffc90000bf76d0 EFLAGS: 00010292 RAX: 0000000000000002 RBX: 00007ffffffff000 RCX: ffff88810c3413c0 RDX: ffff88810c341f50 RSI: 0000000000000008 RDI: 0000000000000007 RBP: ffffc90000bf7708 R08: ffffffff81998d75 R09: ffffed1021868279 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffffff600000 R13: 0000000000000000 R14: ffffc90000bf7768 R15: ffffc90000bf7770 FS: 00007f1bfb1626c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 00000001019ad000 CR4: 00000000003506a0 ---------------- Code disassembly (best guess): 0: 48 89 55 d0 mov %rdx,-0x30(%rbp) 4: 0f 85 ea 01 00 00 jne 0x1f4 a: ff 02 incl (%rdx) c: bf 07 00 00 00 mov $0x7,%edi 11: 4c 89 ee mov %r13,%rsi 14: e8 fb 98 d6 ff call 0xffd69914 19: 49 83 fd 07 cmp $0x7,%r13 1d: 76 5c jbe 0x7b 1f: 4d 89 fe mov %r15,%r14 22: 49 83 c5 f8 add $0xfffffffffffffff8,%r13 26: 49 83 c7 08 add $0x8,%r15 * 2a: 49 8b 1c 24 mov (%r12),%rbx <-- trapping instruction 2e: 4c 89 f0 mov %r14,%rax 31: 48 c1 e8 03 shr $0x3,%rax 35: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 3c: fc ff df 3f: 80 .byte 0x80