kmemleak: 31 new suspected memory leaks (see /sys/kernel/debug/kmemleak) watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor:10989] Modules linked in: irq event stamp: 20688340 hardirqs last enabled at (20688339): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (20688340): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (15929486): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (15928949): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 10989 Comm: syz-executor Not tainted 5.10.109 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 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: 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 7a eb 47 fd 48 89 ef e8 62 a2 48 fd f6 c7 02 75 0c 53 9d <65> ff 0d c4 b2 23 7c 5b 5d c3 e8 9c 32 67 fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff88804caffd00 EFLAGS: 00000287 RAX: 00000000013babd3 RBX: 0000000000000287 RCX: 1ffffffff0cae9fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83debc84 RBP: ffff8880176c4000 R08: 0000000000000001 R09: ffffffff865556b7 R10: fffffbfff0caaad6 R11: 0000000000000001 R12: 1ffff1100995ffa5 R13: ffff88804caffed0 R14: dffffc0000000000 R15: 0000000000000001 FS: 00005555555d7400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5b93617000 CR3: 000000004c0b2000 CR4: 0000000000350ef0 Call Trace: kmemleak_clear mm/kmemleak.c:1745 [inline] kmemleak_write+0x2d1/0x660 mm/kmemleak.c:1788 full_proxy_write+0x11d/0x190 fs/debugfs/file.c:236 vfs_write+0x29a/0xa20 fs/read_write.c:603 ksys_write+0x12d/0x250 fs/read_write.c:658 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f5b930b15c3 Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffd4684f838 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffd4684fe78 RCX: 00007f5b930b15c3 RDX: 0000000000000005 RSI: 00007f5b93161c87 RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000000 R09: 00007ffd468b2090 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5b93616e0d R14: 00007f5b93616e0d R15: 00007f5b93616e0d Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x10 arch/x86/kernel/process.c:689 ---------------- Code disassembly (best guess): 0: 80 00 00 addb $0x0,(%rax) 3: 00 00 add %al,(%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 7a eb 47 fd callq 0xfd47eb95 1b: 48 89 ef mov %rbp,%rdi 1e: e8 62 a2 48 fd callq 0xfd48a285 23: f6 c7 02 test $0x2,%bh 26: 75 0c jne 0x34 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d c4 b2 23 7c decl %gs:0x7c23b2c4(%rip) # 0x7c23b2f5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: c3 retq 34: e8 9c 32 67 fd callq 0xfd6732d5 39: eb ed jmp 0x28 3b: 66 data16 3c: 2e cs 3d: 0f .byte 0xf 3e: 1f (bad) 3f: 84 .byte 0x84