warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow watchdog: BUG: soft lockup - CPU#1 stuck for 27s! [syz-executor.2:12564] Modules linked in: irq event stamp: 196954 hardirqs last enabled at (196953): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (196954): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (196928): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (196923): [] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 12564 Comm: syz-executor.2 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+0x10/0x90 Code: 16 c7 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 b8 87 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:ffff88801c9c7320 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000ffd8 RCX: ffffffff83c33bcd RDX: 0000000000000001 RSI: 000000000000ffd8 RDI: 0000000000000006 RBP: 0000000000000028 R08: 0000000000000006 R09: 000000000000ffd8 R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000ffd8 R13: dffffc0000000000 R14: ffff88800f6f4280 R15: 0000000000000001 FS: 00007f407d300700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ce25000 CR3: 0000000040b2e000 CR4: 0000000000350ee0 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: 0033:0x7f407fdabb19 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:00007f407d300188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f407febf020 RCX: 00007f407fdabb19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f407fe05f6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001a000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9a990f4f R14: 00007f407d300300 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), 1 bytes skipped: 0: c7 06 03 66 0f 1f movl $0x1f0f6603,(%rsi) 6: 44 00 00 add %r8b,(%rax) 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop 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: 49 89 f1 mov %rsi,%r9 1c: 49 89 d2 mov %rdx,%r10 1f: 49 89 f8 mov %rdi,%r8 22: 65 8b 05 b8 87 b7 7e mov %gs:0x7eb787b8(%rip),%eax # 0x7eb787e1 * 29: 89 c6 mov %eax,%esi <-- trapping instruction 2b: 81 e6 00 01 00 00 and $0x100,%esi 31: 65 48 8b 14 25 00 8b mov %gs:0x38b00,%rdx 38: 03 00 3a: a9 00 01 ff 00 test $0xff0100,%eax