watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.2:9254] Modules linked in: irq event stamp: 5402829 hardirqs last enabled at (5402828): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5402829): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (5383764): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (5383767): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 9254 Comm: syz-executor.2 Not tainted 6.2.0-rc1-next-20221226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rcu_core+0x6cd/0x19c0 Code: 00 00 4c 89 a3 18 01 00 00 48 8b 35 8d 91 9b 04 48 8d bb a0 00 00 00 e8 21 bd fe ff 48 85 ed 74 06 e8 b7 18 1b 00 fb 4c 89 ef fe 57 00 00 49 89 c7 48 85 c0 0f 84 a9 0c 00 00 65 48 8b 04 25 RSP: 0018:ffff88806ce09e58 EFLAGS: 00000202 RAX: 00000000005270c2 RBX: ffff88806ce3a040 RCX: ffffffff812b3b2f RDX: 0000000000000000 RSI: 0000000000000100 RDI: ffff88806ce09ed8 RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff876328d7 R10: fffffbfff0ec651a R11: 0000000000000001 R12: 0000000000000000 R13: ffff88806ce09ed8 R14: ffff88806ce3a050 R15: ffff88806ce3a0e0 FS: 00007f50addc2700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffef51486b8 CR3: 000000003ae5c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:lock_acquire.part.0+0x14d/0x340 Code: 87 84 48 83 c4 20 e8 42 cd 12 03 b8 ff ff ff ff 65 0f c1 05 9d a5 d6 7e 83 f8 01 0f 85 9f 01 00 00 48 85 ed 0f 85 90 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff888047b474a0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff11008f68e96 RCX: 00000000000020b7 RDX: 1ffff11008e8db33 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff876328d7 R10: fffffbfff0ec651a R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff856baae0 fs_reclaim_acquire+0x121/0x170 kmem_cache_alloc+0x40/0x410 ptlock_alloc+0x21/0x70 pte_alloc_one+0x6c/0x200 __pte_alloc+0x6d/0x210 copy_page_range+0x1b90/0x4180 dup_mmap+0xa4a/0xfc0 copy_process+0x6ac7/0x7160 kernel_clone+0xeb/0x8a0 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f50b084cb19 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:00007f50addc2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f50b095ff60 RCX: 00007f50b084cb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200008c0 RBP: 00007f50b08a6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebd0e567f R14: 00007f50addc2300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 4c 89 a3 18 01 00 00 mov %r12,0x118(%rbx) 9: 48 8b 35 8d 91 9b 04 mov 0x49b918d(%rip),%rsi # 0x49b919d 10: 48 8d bb a0 00 00 00 lea 0xa0(%rbx),%rdi 17: e8 21 bd fe ff callq 0xfffebd3d 1c: 48 85 ed test %rbp,%rbp 1f: 74 06 je 0x27 21: e8 b7 18 1b 00 callq 0x1b18dd 26: fb sti 27: 4c 89 ef mov %r13,%rdi * 2a: e8 fe 57 00 00 callq 0x582d <-- trapping instruction 2f: 49 89 c7 mov %rax,%r15 32: 48 85 c0 test %rax,%rax 35: 0f 84 a9 0c 00 00 je 0xce4 3b: 65 gs 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 04 25 add $0x25,%al