------------[ cut here ]------------ WARNING: CPU: 0 PID: 5483 at include/linux/skbuff.h:2735 pskb_may_pull include/linux/skbuff.h:2751 [inline] WARNING: CPU: 0 PID: 5483 at include/linux/skbuff.h:2735 skb_ensure_writable+0x2ea/0x440 net/core/skbuff.c:6100 Modules linked in: CPU: 0 PID: 5483 Comm: syz-executor.0 Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:pskb_may_pull_reason include/linux/skbuff.h:2735 [inline] RIP: 0010:pskb_may_pull include/linux/skbuff.h:2751 [inline] RIP: 0010:skb_ensure_writable+0x2ea/0x440 net/core/skbuff.c:6100 Code: cc e8 fa 15 a1 f8 4c 89 ef 31 f6 31 d2 b9 20 08 00 00 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 cb 04 fe ff e8 d6 15 a1 f8 <0f> 0b e9 40 fd ff ff 44 89 f7 44 89 e6 e8 74 17 a1 f8 45 39 e6 0f RSP: 0018:ffffc900043df910 EFLAGS: 00010293 RAX: ffffffff88f4904a RBX: ffff888028a41140 RCX: ffff88802b2c3c00 RDX: 0000000000000000 RSI: 00000000fffffff7 RDI: 0000000000000000 RBP: 00000000fffffff7 R08: ffffffff88f48d83 R09: 1ffffffff1e80605 R10: dffffc0000000000 R11: ffffffffa0001a20 R12: 00000000fffffff7 R13: ffff888028a41140 R14: ffffc900030a6030 R15: dffffc0000000000 FS: 00007f84b21b66c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f84b15a80c0 CR3: 000000006a056000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bpf_try_make_writable net/core/filter.c:1665 [inline] bpf_try_make_writable net/core/filter.c:1671 [inline] ____bpf_skb_pull_data net/core/filter.c:1862 [inline] bpf_skb_pull_data+0x78/0x230 net/core/filter.c:1851 bpf_prog_c054a5fa89446ea8+0x1c/0x3f bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] bpf_test_run+0x405/0x8f0 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0xaf4/0x13a0 net/bpf/test_run.c:1058 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4269 __sys_bpf+0x489/0x810 kernel/bpf/syscall.c:5678 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5765 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x84/0x190 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f84b147de69 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:00007f84b21b60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f84b15abf80 RCX: 00007f84b147de69 RDX: 0000000000000050 RSI: 00000000200002c0 RDI: 000000000000000a RBP: 00007f84b14ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f84b15abf80 R15: 00007ffefe8a93e8