RBP: 00007f6838010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f68381b5fa0 R15: 00007ffe8fbc7408 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.3.198:6555] Modules linked in: irq event stamp: 813374 hardirqs last enabled at (813373): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357 hardirqs last disabled at (813374): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (813370): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (813370): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607 softirqs last disabled at (813333): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (813333): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (813333): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6555 Comm: syz.3.198 Not tainted 6.15.0-rc7-syzkaller-00175-g0f8c0258bf04 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x4aa/0x1290 kernel/smp.c:885 Code: 0c 00 85 ed 74 48 48 8b 44 24 20 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 f4 83 c5 03 e8 dd 17 0c 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 de 0b 00 00 8b 43 08 31 ff 83 e0 01 41 RSP: 0018:ffffc9000ad97c10 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880b84415e0 RCX: ffffc9000c82c000 RDX: 0000000000080000 RSI: ffffffff81af2d63 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170882bd R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b853b180 FS: 00007f6838e066c0(0000) GS:ffff888124ae0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd0c77c908 CR3: 0000000051b8d000 CR4: 0000000000350ef0 Call Trace: clock_was_set+0x642/0x870 kernel/time/hrtimer.c:976 do_settimeofday64+0x323/0x4d0 kernel/time/timekeeping.c:1407 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1140 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1124 [inline] __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1124 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6837f8e969 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6838e06038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007f68381b5fa0 RCX: 00007f6837f8e969 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000 RBP: 00007f6838010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f68381b5fa0 R15: 00007ffe8fbc7408 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6007 Comm: udevd Not tainted 6.15.0-rc7-syzkaller-00175-g0f8c0258bf04 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:debug_object_activate+0xc5/0x4c0 lib/debugobjects.c:805 Code: 00 48 c7 44 24 58 00 00 00 00 c7 44 24 60 05 00 00 00 48 89 74 24 70 48 89 74 24 18 75 4a 31 d2 48 b8 00 00 00 00 00 fc ff df <4d> 8d 0c 07 49 c7 01 00 00 00 00 49 c7 41 08 00 00 00 00 48 8b 84 RSP: 0018:ffffc90000007d20 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8880349f1e00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc90000007e08 R08: 0000000000000000 R09: fffffbfff35a4ecc R10: ffffffff9ad27663 R11: ffffffff9ad27660 R12: 0000000000000002 R13: ffff888027598340 R14: dffffc0000000000 R15: 1ffff92000000fa8 FS: 00007f67d169c880(0000) GS:ffff8881249e0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3041fffc CR3: 000000003373e000 CR4: 0000000000350ef0 Call Trace: debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline] debug_activate kernel/time/hrtimer.c:484 [inline] enqueue_hrtimer+0x23/0x3b0 kernel/time/hrtimer.c:1088 __run_hrtimer kernel/time/hrtimer.c:1778 [inline] __hrtimer_run_queues+0x8ff/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_release+0x183/0x2f0 kernel/locking/lockdep.c:5891 Code: 0f c1 05 68 1c 0c 12 83 f8 01 0f 85 1d 01 00 00 9c 58 f6 c4 02 0f 85 08 01 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 bd de 0b 12 0f 85 58 01 00 00 48 83 c4 18 5b 41 5c 41 RSP: 0018:ffffc90004a77910 EFLAGS: 00000206 RAX: cb03ee836df56100 RBX: ffffffff8e3bfc00 RCX: ffffc90004a7791c RDX: 0000000000000001 RSI: ffffffff8dbbb273 RDI: ffffffff8bf49120 RBP: 0000000000000001 R08: ffffffff9112d542 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8169dd54 R13: 0000000000000206 R14: ffff88801db90000 R15: 0000000000000002 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x3f9/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xb8/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0x76/0x470 mm/slab_common.c:1962 kernfs_unlink_open_file+0x3ad/0x4b0 fs/kernfs/file.c:586 kernfs_fop_release+0xe9/0x1e0 fs/kernfs/file.c:765 __fput+0x402/0xb70 fs/file_table.c:465 fput_close_sync+0x118/0x260 fs/file_table.c:570 __do_sys_close fs/open.c:1581 [inline] __se_sys_close fs/open.c:1566 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1566 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f67d0f15a67 Code: 44 00 00 48 83 ec 10 48 63 ff 45 31 c9 45 31 c0 6a 01 31 c9 e8 ca 19 f9 ff 48 83 c4 18 c3 0f 1f 44 00 00 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 61 b3 0d 00 f7 d8 64 89 02 b8 RSP: 002b:00007ffd0c780738 EFLAGS: 00000297 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000558681cf8f30 RCX: 00007f67d0f15a67 RDX: 00007f67d0fefea0 RSI: 0000558681ffe9c0 RDI: 0000000000000008 RBP: 00007f67d0fefff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 R13: 3d45505954564544 R14: 3d5845444e494649 R15: 3d454d414e564544