kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8247 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:strcmp+0x35/0xb0 lib/string.c:384 Code: df 41 54 55 53 48 89 fb 48 83 ec 08 eb 08 40 84 ed 74 5d 4c 89 e6 48 89 df 48 83 c3 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 0f b6 6b ff 4c 8d 66 01 48 RSP: 0018:ffff88803203f198 EFLAGS: 00010246 RAX: 1bd5a9d5a0000002 RBX: dead4ead00000011 RCX: ffffc900062c3000 RDX: 0000000000000000 RSI: ffffffff89509340 RDI: dead4ead00000010 RBP: ffffffff89509340 R08: ffff8880a4c661c0 R09: ffffed101498cc38 R10: ffff8880a4c661c7 R11: 00000000a5a221d2 R12: dead4ead00000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880aaa0c040 FS: 00007f6352781700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000514c5000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xt_find_match net/netfilter/x_tables.c:191 [inline] xt_find_match+0x13f/0x280 net/netfilter/x_tables.c:181 xt_request_find_match net/netfilter/x_tables.c:219 [inline] xt_request_find_match+0x88/0x110 net/netfilter/x_tables.c:212 get_xt_match net/sched/em_ipt.c:112 [inline] em_ipt_change+0x1c7/0x470 net/sched/em_ipt.c:132 tcf_em_validate net/sched/ematch.c:248 [inline] tcf_em_tree_validate net/sched/ematch.c:365 [inline] tcf_em_tree_validate+0x8fa/0xea0 net/sched/ematch.c:307 basic_set_parms net/sched/cls_basic.c:155 [inline] basic_change+0x1173/0x1260 net/sched/cls_basic.c:212 tc_new_tfilter+0xb52/0x16c0 net/sched/cls_api.c:1320 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6354250639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6352781168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6354371120 RCX: 00007f6354250639 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f63542aba41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb62cfa3f R14: 00007f6352781300 R15: 0000000000022000 Modules linked in: ---[ end trace f2aea7f460b1188a ]--- RIP: 0010:strcmp+0x35/0xb0 lib/string.c:384 Code: df 41 54 55 53 48 89 fb 48 83 ec 08 eb 08 40 84 ed 74 5d 4c 89 e6 48 89 df 48 83 c3 01 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 28 38 d0 7f 04 84 c0 75 50 0f b6 6b ff 4c 8d 66 01 48 RSP: 0018:ffff88803203f198 EFLAGS: 00010246 RAX: 1bd5a9d5a0000002 RBX: dead4ead00000011 RCX: ffffc900062c3000 RDX: 0000000000000000 RSI: ffffffff89509340 RDI: dead4ead00000010 RBP: ffffffff89509340 R08: ffff8880a4c661c0 R09: ffffed101498cc38 R10: ffff8880a4c661c7 R11: 00000000a5a221d2 R12: dead4ead00000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880aaa0c040 FS: 00007f6352781700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1e34806718 CR3: 00000000514c5000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 41 54 filds 0x54(%rcx) 3: 55 push %rbp 4: 53 push %rbx 5: 48 89 fb mov %rdi,%rbx 8: 48 83 ec 08 sub $0x8,%rsp c: eb 08 jmp 0x16 e: 40 84 ed test %bpl,%bpl 11: 74 5d je 0x70 13: 4c 89 e6 mov %r12,%rsi 16: 48 89 df mov %rbx,%rdi 19: 48 83 c3 01 add $0x1,%rbx 1d: 48 89 f8 mov %rdi,%rax 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 e8 03 shr $0x3,%rax 27: 83 e2 07 and $0x7,%edx * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 38 d0 cmp %dl,%al 31: 7f 04 jg 0x37 33: 84 c0 test %al,%al 35: 75 50 jne 0x87 37: 0f b6 6b ff movzbl -0x1(%rbx),%ebp 3b: 4c 8d 66 01 lea 0x1(%rsi),%r12 3f: 48 rex.W