watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.6:4035] Modules linked in: irq event stamp: 277450 hardirqs last enabled at (277449): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (277450): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (277420): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (277401): [] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 4035 Comm: syz-executor.6 Not tainted 6.4.0-rc6-next-20230615 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__ip6_append_data.isra.0+0xc3c/0x4560 Code: 4c 89 fe 4c 89 e7 e8 c3 aa 88 fd 4d 39 fc 76 08 e8 a9 af 88 fd 44 89 fb e8 a1 af 88 fd 48 8b 04 24 48 c1 e8 03 42 80 3c 28 00 <0f> 85 8c 2e 00 00 48 8b 04 24 4c 8b 20 49 8d bc 24 f0 00 00 00 48 RSP: 0018:ffff888042b67328 EFLAGS: 00000246 RAX: 1ffff11007f4d628 RBX: 0000000000000001 RCX: ffffc9000a44d000 RDX: 0000000000040000 RSI: ffffffff83c3562f RDI: 0000000000000006 RBP: 0000000000000028 R08: 0000000000000006 R09: 000000000000ffd8 R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000ffd8 R13: dffffc0000000000 R14: ffff888016bfd280 R15: 0000000000000001 FS: 00007fc83c9b4700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c43a000 CR3: 0000000016c84000 CR4: 0000000000350ee0 Call Trace: ip6_append_data+0x1d4/0x530 rawv6_sendmsg+0x156e/0x3dc0 inet_sendmsg+0x121/0x150 sock_sendmsg+0x19b/0x200 splice_to_socket+0x949/0xe10 direct_splice_actor+0x119/0x180 splice_direct_to_actor+0x349/0x9d0 do_splice_direct+0x1bb/0x290 do_sendfile+0xb6b/0x1370 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fc83f45fb19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc83c9b4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fc83f573020 RCX: 00007fc83f45fb19 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007 RBP: 00007fc83f4b9f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0a2c603f R14: 00007fc83c9b4300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 4c 89 fe mov %r15,%rsi 3: 4c 89 e7 mov %r12,%rdi 6: e8 c3 aa 88 fd callq 0xfd88aace b: 4d 39 fc cmp %r15,%r12 e: 76 08 jbe 0x18 10: e8 a9 af 88 fd callq 0xfd88afbe 15: 44 89 fb mov %r15d,%ebx 18: e8 a1 af 88 fd callq 0xfd88afbe 1d: 48 8b 04 24 mov (%rsp),%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) * 2a: 0f 85 8c 2e 00 00 jne 0x2ebc <-- trapping instruction 30: 48 8b 04 24 mov (%rsp),%rax 34: 4c 8b 20 mov (%rax),%r12 37: 49 8d bc 24 f0 00 00 lea 0xf0(%r12),%rdi 3e: 00 3f: 48 rex.W