watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.1:4054] Modules linked in: irq event stamp: 192322 hardirqs last enabled at (192321): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (192322): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (192282): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (192275): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 4054 Comm: syz-executor.1 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:write_comp_data+0x3c/0x90 Code: 81 e6 00 01 00 00 65 48 8b 14 25 00 8b 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 9c 14 00 00 85 c0 74 4f 8b 82 78 14 00 00 <83> f8 03 75 44 48 8b 82 80 14 00 00 8b 92 7c 14 00 00 48 8b 38 48 RSP: 0018:ffff8880158c7320 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 000000000000ffd8 RCX: ffffffff83c33bcd RDX: ffff888009b39b40 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 0000000000000028 R08: 0000000000000006 R09: 000000000000ffd8 R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000ffd8 R13: dffffc0000000000 R14: ffff88800dc43c80 R15: 0000000000000001 FS: 00007f5c7ab1d700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c02b000 CR3: 000000001e1b6000 CR4: 0000000000350ef0 Call Trace: __ip6_append_data.isra.0+0xc1d/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: 0033:0x7f5c7d5c8b19 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:00007f5c7ab1d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f5c7d6dc020 RCX: 00007f5c7d5c8b19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f5c7d622f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1473e15f R14: 00007f5c7ab1d300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4052 Comm: syz-executor.0 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_const_cmp4+0x8/0x20 Code: bf 03 00 00 00 e9 58 fe ff ff 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 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffff888041b9f320 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83c346da RDX: 0000000000040000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff888019b27280 R15: 0000000000000001 FS: 00007f34ffe79700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bf2b000 CR3: 000000001bccc000 CR4: 0000000000350ee0 Call Trace: __ip6_append_data.isra.0+0x172a/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: 0033:0x7f3502924b19 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:00007f34ffe79188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f3502a38020 RCX: 00007f3502924b19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f350297ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc85328edf R14: 00007f34ffe79300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 81 e6 00 01 00 00 and $0x100,%esi 6: 65 48 8b 14 25 00 8b mov %gs:0x38b00,%rdx d: 03 00 f: a9 00 01 ff 00 test $0xff0100,%eax 14: 74 0e je 0x24 16: 85 f6 test %esi,%esi 18: 74 59 je 0x73 1a: 8b 82 9c 14 00 00 mov 0x149c(%rdx),%eax 20: 85 c0 test %eax,%eax 22: 74 4f je 0x73 24: 8b 82 78 14 00 00 mov 0x1478(%rdx),%eax * 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction 2d: 75 44 jne 0x73 2f: 48 8b 82 80 14 00 00 mov 0x1480(%rdx),%rax 36: 8b 92 7c 14 00 00 mov 0x147c(%rdx),%edx 3c: 48 8b 38 mov (%rax),%rdi 3f: 48 rex.W