watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.6:5970] Modules linked in: irq event stamp: 120100 hardirqs last enabled at (120099): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (120100): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (120084): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (120079): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 5970 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:__sanitizer_cov_trace_pc+0x50/0x70 Code: 0e 85 c9 74 35 8b 82 9c 14 00 00 85 c0 74 2b 8b 82 78 14 00 00 83 f8 02 75 20 48 8b 8a 80 14 00 00 8b 92 7c 14 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 01 48 89 34 c1 e9 0b e4 06 03 66 RSP: 0018:ffff888042797320 EFLAGS: 00000246 RAX: 000000000003ffff RBX: 0000000000000000 RCX: ffffc90007e0a000 RDX: 0000000000040000 RSI: ffffffff83c35511 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff88803e2f0c80 R15: 0000000000000001 FS: 00007f576c7f3700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c72c000 CR3: 0000000041c08000 CR4: 0000000000350ef0 Call Trace: __ip6_append_data.isra.0+0xb11/0x4560 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+0xb6b/0x1370 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f576f29eb19 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:00007f576c7f3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f576f3b2020 RCX: 00007f576f29eb19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f576f2f8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe95425d3f R14: 00007f576c7f3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5978 Comm: syz-executor.7 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:write_comp_data+0x10/0x90 Code: a6 ea 06 03 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 f1 49 89 d2 49 89 f8 65 8b 05 48 8b b7 7e <89> c6 81 e6 00 01 00 00 65 48 8b 14 25 00 8b 03 00 a9 00 01 ff 00 RSP: 0018:ffff888041c27320 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff83c3569d RDX: 0000000008000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000008000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000008000000 R11: 0000000000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: ffff8880169f9b40 R15: 0000000000000001 FS: 00007fa4d51e0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c62c000 CR3: 000000000e314000 CR4: 0000000000350ee0 Call Trace: __ip6_append_data.isra.0+0xc9d/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+0xb6b/0x1370 __x64_sys_sendfile64+0x1d5/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fa4d7cacb19 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:00007fa4d51e0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa4d7dc00e0 RCX: 00007fa4d7cacb19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007fa4d7d06f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcee7cc95f R14: 00007fa4d51e0300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 85 c9 test %ecx,%ecx 2: 74 35 je 0x39 4: 8b 82 9c 14 00 00 mov 0x149c(%rdx),%eax a: 85 c0 test %eax,%eax c: 74 2b je 0x39 e: 8b 82 78 14 00 00 mov 0x1478(%rdx),%eax 14: 83 f8 02 cmp $0x2,%eax 17: 75 20 jne 0x39 19: 48 8b 8a 80 14 00 00 mov 0x1480(%rdx),%rcx 20: 8b 92 7c 14 00 00 mov 0x147c(%rdx),%edx 26: 48 8b 01 mov (%rcx),%rax * 29: 48 83 c0 01 add $0x1,%rax <-- trapping instruction 2d: 48 39 c2 cmp %rax,%rdx 30: 76 07 jbe 0x39 32: 48 89 01 mov %rax,(%rcx) 35: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 39: e9 0b e4 06 03 jmpq 0x306e449 3e: 66 data16