ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 watchdog: BUG: soft lockup - CPU#0 stuck for 245s! [syz-executor.2:5111] Modules linked in: irq event stamp: 36257060 hardirqs last enabled at (36257059): [] kvm_wait arch/x86/kernel/kvm.c:1058 [inline] hardirqs last enabled at (36257059): [] kvm_wait+0x131/0x180 arch/x86/kernel/kvm.c:1040 hardirqs last disabled at (36257060): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1076 softirqs last enabled at (36257056): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (36257056): [] __do_softirq+0x597/0x8de kernel/softirq.c:582 softirqs last disabled at (36256969): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (36256969): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (36256969): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 CPU: 0 PID: 5111 Comm: syz-executor.2 Not tainted 6.7.0-rc4-syzkaller-00384-gb10a3ccaf6e3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:kvm_wait+0x146/0x180 arch/x86/kernel/kvm.c:1062 Code: 5b 5d 41 5c 41 5d e9 29 30 4e 00 e8 24 30 4e 00 e8 1f e9 54 00 eb 0c e8 18 30 4e 00 0f 00 2d 41 5a 90 09 e8 0c 30 4e 00 fb f4 <5b> 5d 41 5c 41 5d e9 ff 2f 4e 00 e8 fa 2f 4e 00 e8 65 e9 54 00 e9 RSP: 0018:ffffc900045b79f8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 1ffffffff23eb5ce RDX: ffff888025565940 RSI: ffffffff81395da4 RDI: ffffffff8b2f1260 RBP: ffff88814c2f2000 R08: 0000000000000001 R09: fffffbfff23e37e3 R10: ffffffff91f1bf1f R11: 0000000000000003 R12: 0000000000000003 R13: 0000000000000003 R14: 0000000000000000 R15: ffffed102985e400 FS: 0000555555811480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc3ba14ef8 CR3: 000000002f2b1000 CR4: 0000000000350ef0 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:598 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x959/0xc70 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x20e/0x2b0 kernel/locking/spinlock_debug.c:115 spin_lock include/linux/spinlock.h:351 [inline] ext4_lock_group fs/ext4/ext4.h:3492 [inline] ext4_free_inode+0xadd/0x1420 fs/ext4/ialloc.c:315 ext4_evict_inode+0xdaf/0x1a40 fs/ext4/inode.c:303 evict+0x2ed/0x6b0 fs/inode.c:666 iput_final fs/inode.c:1777 [inline] iput.part.0+0x560/0x7b0 fs/inode.c:1803 iput+0x5c/0x80 fs/inode.c:1793 do_unlinkat+0x60f/0x740 fs/namei.c:4389 __do_sys_unlink fs/namei.c:4430 [inline] __se_sys_unlink fs/namei.c:4428 [inline] __x64_sys_unlink+0xc8/0x110 fs/namei.c:4428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fd1a807c357 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc3ba156a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd1a807c357 RDX: 00007ffc3ba156d0 RSI: 00007ffc3ba15760 RDI: 00007ffc3ba15760 RBP: 00007ffc3ba15760 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc3ba16820 R13: 00007fd1a80c73b9 R14: 00000000002f2544 R15: 0000000000000001 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3515 Comm: syz-executor.4 Not tainted 6.7.0-rc4-syzkaller-00384-gb10a3ccaf6e3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:__timerqueue_less lib/timerqueue.c:22 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:174 [inline] RIP: 0010:timerqueue_add+0xfc/0x330 lib/timerqueue.c:40 Code: 80 3c 22 00 0f 85 c6 01 00 00 49 8b 17 48 85 d2 74 40 48 89 d3 e8 24 92 15 f7 48 8d 7b 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 ad 01 00 00 4c 8b 7b 18 4c 89 ef 4c 89 fe e8 0f 8d 15 f7 4d RSP: 0018:ffffc900001f0dd8 EFLAGS: 00000046 RAX: 1ffff11006adf66b RBX: ffff8880356fb340 RCX: ffffffff8a71fae8 RDX: ffff888027593b80 RSI: ffffffff8a71fb8c RDI: ffff8880356fb358 RBP: ffff888034106340 R08: 0000000000000006 R09: ffff888034106340 R10: ffff888034106340 R11: 0000000000000005 R12: dffffc0000000000 R13: 0277c6936a8251e8 R14: 0000000000000001 R15: 0000000000000001 FS: 0000555555ca7480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcce7cffd84 CR3: 000000003ea41000 CR4: 0000000000350ef0 Call Trace: enqueue_hrtimer+0x16f/0x310 kernel/time/hrtimer.c:1094 __run_hrtimer kernel/time/hrtimer.c:1705 [inline] __hrtimer_run_queues+0xa12/0xc20 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:ext4_chksum fs/ext4/ext4.h:2472 [inline] RIP: 0010:ext4_inode_bitmap_csum_set+0x1f4/0x3a0 fs/ext4/bitmap.c:51 Code: 8e ae 01 00 00 41 8b 06 bf 04 00 00 00 89 c6 89 44 24 08 e8 2e 9d 59 ff 8b 44 24 08 83 f8 04 0f 85 44 01 00 00 e8 ac a1 59 ff <8b> 44 24 0c 44 89 ea 4c 89 ff 48 8b 34 24 4c 89 74 24 30 89 44 24 RSP: 0018:ffffc90014af7a40 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88814c310000 RCX: ffffffff822debf2 RDX: ffff888027593b80 RSI: ffffffff822dec04 RDI: 0000000000000005 RBP: 1ffff9200295ef4a R08: 0000000000000005 R09: 0000000000000004 R10: 0000000000000004 R11: 0000000000000003 R12: ffff88802692d000 R13: 0000000000000400 R14: ffff88802783c700 R15: ffffc90014af7a70 __ext4_new_inode+0x1b58/0x5200 fs/ext4/ialloc.c:1227 ext4_symlink+0x5d7/0xa20 fs/ext4/namei.c:3398 vfs_symlink fs/namei.c:4464 [inline] vfs_symlink+0x3e5/0x620 fs/namei.c:4448 do_symlinkat+0x25f/0x310 fs/namei.c:4490 __do_sys_symlinkat fs/namei.c:4506 [inline] __se_sys_symlinkat fs/namei.c:4503 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4503 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fcce7c7c327 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc867be538 EFLAGS: 00000202 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 00007ffc867be600 RCX: 00007fcce7c7c327 RDX: 00007fcce7cc852f RSI: 00000000ffffff9c RDI: 00007ffc867be600 RBP: 0000000000000001 R08: 0000000000000013 R09: 00007ffc867be287 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001