EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue ext4 filesystem being mounted at /syzkaller-testdir290736652/syzkaller.RhdZz5/24/file0 supports timestamps until 2038 (0x7fffffff) watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:4996] Modules linked in: irq event stamp: 4771323 hardirqs last enabled at (4771322): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4771323): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (4764168): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4764171): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4996 Comm: syz-executor.0 Not tainted 5.10.147 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 3e 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 ca 37 45 fd 48 89 ef e8 a2 f1 45 fd f6 c7 02 75 10 53 9d <65> ff 0d b4 b2 20 7c 5b 5d e9 6d 83 3e 00 e8 a8 b6 64 fd eb e9 66 RSP: 0018:ffff88806cf09e20 EFLAGS: 00000282 RAX: 000000000048cdaa RBX: 0000000000000282 RCX: 1ffffffff0cf3bd2 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e1bc98 RBP: ffff88806cf2ea80 R08: 0000000000000001 R09: ffffffff86797677 R10: fffffbfff0cf2ece R11: 0000000000000001 R12: ffff88806cf2ea80 R13: ffff88806cf2ed00 R14: dffffc0000000000 R15: ffff88806cf2ea80 FS: 00007f4b6e81b700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9b7fe71ae0 CR3: 0000000045d50000 CR4: 0000000000350ee0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1579 [inline] __hrtimer_run_queues+0x524/0xb50 kernel/time/hrtimer.c:1647 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1664 __do_softirq+0x1b8/0x86b kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:79 [inline] RIP: 0010:put_cpu_partial+0x2/0x130 mm/slub.c:2385 Code: 44 24 10 49 39 45 40 0f 82 47 ff ff ff 48 8b 44 24 08 4c 89 7c 24 08 49 89 47 08 e9 5e ff ff ff e8 03 cf 74 02 0f 1f 00 41 56 <65> ff 05 47 23 97 7e 41 55 41 54 41 89 d4 55 48 89 fd 53 48 89 f3 RSP: 0018:ffff8880455176c0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000800c000b RDX: 0000000000000001 RSI: ffffea0000350500 RDI: ffff888007feaa00 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff816bc701 R10: ffff88800d414500 R11: 0000000000000001 R12: ffff888045517708 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff8880455bd800 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x360 mm/slub.c:2909 ptlock_alloc+0x1d/0x70 mm/memory.c:5321 ptlock_init include/linux/mm.h:2196 [inline] pgtable_pte_page_ctor include/linux/mm.h:2223 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:66 [inline] pte_alloc_one+0x68/0x1a0 arch/x86/mm/pgtable.c:33 __pte_alloc+0x1d/0x330 mm/memory.c:428 copy_pte_range mm/memory.c:941 [inline] copy_pmd_range mm/memory.c:1059 [inline] copy_pud_range mm/memory.c:1096 [inline] copy_p4d_range mm/memory.c:1120 [inline] copy_page_range+0x1a1d/0x3810 mm/memory.c:1193 dup_mmap kernel/fork.c:593 [inline] dup_mm+0x8b9/0x1110 kernel/fork.c:1368 copy_mm kernel/fork.c:1424 [inline] copy_process+0x23fc/0x66f0 kernel/fork.c:2106 kernel_clone+0xe7/0xa20 kernel/fork.c:2467 __do_sys_fork+0x8a/0xc0 kernel/fork.c:2530 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f4b712a5b19 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:00007f4b6e81b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007f4b713b8f60 RCX: 00007f4b712a5b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f4b712fff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff13617cef R14: 00007f4b6e81b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:689 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 55 push %rbp 4: 48 89 fd mov %rdi,%rbp 7: 48 83 c7 18 add $0x18,%rdi b: 53 push %rbx c: 48 89 f3 mov %rsi,%rbx f: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 14: e8 ca 37 45 fd callq 0xfd4537e3 19: 48 89 ef mov %rbp,%rdi 1c: e8 a2 f1 45 fd callq 0xfd45f1c3 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d b4 b2 20 7c decl %gs:0x7c20b2b4(%rip) # 0x7c20b2e3 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 6d 83 3e 00 jmpq 0x3e83a3 36: e8 a8 b6 64 fd callq 0xfd64b6e3 3b: eb e9 jmp 0x26 3d: 66 data16