kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 25691 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 30 52 85 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 31 52 85 04 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 e8 51 85 04 49 8d 7d RSP: 0018:ffff88805517fd70 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff88808bee1380 RCX: ffffffff814bdebb RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808bee1850 RBP: ffff88808bee1848 R08: 0000000000000001 R09: ffffed1009d1de65 R10: ffff88804e8ef32b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88808bee1848 R15: ffff88808bee1850 FS: 0000555556837400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31122000 CR3: 00000000a47a0000 CR4: 00000000003406f0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'. DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:117 [inline] list_del_rcu include/linux/rculist.h:130 [inline] xdp_del_sk_umem+0x72/0x1a0 net/xdp/xdp_umem.c:42 xsk_release+0x128/0x350 net/xdp/xsk.c:344 __sock_release+0xcd/0x2a0 net/socket.c:599 sock_close+0x15/0x20 net/socket.c:1214 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efffb5d0c8b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffe0bcbf590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007efffb5d0c8b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 00007efffb732960 R08: 0000000000000000 R09: 00007efffb735a38 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000afee4 R13: 00007ffe0bcbf690 R14: 00007efffb731030 R15: 0000000000000032 Modules linked in: ---[ end trace ceb61afbc54f0d8f ]--- RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 30 52 85 04 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 31 52 85 04 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 e8 51 85 04 49 8d 7d RSP: 0018:ffff88805517fd70 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff88808bee1380 RCX: ffffffff814bdebb RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808bee1850 RBP: ffff88808bee1848 R08: 0000000000000001 R09: ffffed1009d1de65 R10: ffff88804e8ef32b R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88808bee1848 R15: ffff88808bee1850 FS: 0000555556837400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31122000 CR3: 00000000a47a0000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 30 52 85 04 je 0x4855236 6: 48 b8 00 02 00 00 00 movabs $0xdead000000000200,%rax d: 00 ad de 10: 49 39 c4 cmp %rax,%r12 13: 0f 84 31 52 85 04 je 0x485524a 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 51 jne 0x81 30: 49 8b 14 24 mov (%r12),%rdx 34: 48 39 ea cmp %rbp,%rdx 37: 0f 85 e8 51 85 04 jne 0x4855225 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 7d .byte 0x7d