watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor.6:12822] Modules linked in: irq event stamp: 146948 hardirqs last enabled at (146947): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (146948): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (146946): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (146941): [] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 12822 Comm: syz-executor.6 Not tainted 6.4.0-rc6-next-20230613 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 Code: c0 e9 f9 c0 06 03 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 9d 81 b7 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 8b 03 00 a9 RSP: 0018:ffff88804a3cf180 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8366e620 RDX: ffff888042188000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 0000000008000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88800fe323c0 R14: ffff88800fe323c0 R15: ffff88804a3cf738 FS: 00007fc19ec38700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c430000 CR3: 000000004aac0000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: skb_splice_from_iter+0x985/0xb50 __ip6_append_data.isra.0+0x1715/0x4560 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+0xb4b/0x12f0 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fc1a16e3b19 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:00007fc19ec38188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fc1a17f7020 RCX: 00007fc1a16e3b19 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007 RBP: 00007fc1a173df6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe95d1c89f R14: 00007fc19ec38300 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: c0 e9 f9 shr $0xf9,%cl 3: c0 06 03 rolb $0x3,(%rsi) 6: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) d: 00 00 f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: f3 0f 1e fa endbr64 23: 65 8b 05 9d 81 b7 7e mov %gs:0x7eb7819d(%rip),%eax # 0x7eb781c7 * 2a: 89 c1 mov %eax,%ecx <-- trapping instruction 2c: 48 8b 34 24 mov (%rsp),%rsi 30: 81 e1 00 01 00 00 and $0x100,%ecx 36: 65 48 8b 14 25 00 8b mov %gs:0x38b00,%rdx 3d: 03 00 3f: a9 .byte 0xa9