watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.7.7786:5960] Modules linked in: irq event stamp: 10793777 hardirqs last enabled at (10793776): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (10793777): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (7466508): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (7466508): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (7466508): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (7466511): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (7466511): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (7466511): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 5960 Comm: syz.7.7786 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:98 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x97/0x2c0 mm/kasan/generic.c:200 Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 9e 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00 00 44 89 dd RSP: 0018:ffffc90000007400 EFLAGS: 00000206 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff81a0c3e6 RDX: 0000000000000000 RSI: 000000000000000d RDI: ffffffff8bce0080 RBP: ffffc90000007560 R08: ffffffff8bce008c R09: 1ffffffff179c011 R10: dffffc0000000000 R11: fffffbfff179c011 R12: 0000000000000002 R13: 000000000000000e R14: fffffbfff179c012 R15: 1ffffffff179c010 FS: 00007f529a3a36c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3331cff8 CR3: 00000000a0ecc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x2d6/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4515 [inline] slab_alloc_node mm/slub.c:4844 [inline] kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4896 kmalloc_reserve net/core/skbuff.c:613 [inline] __alloc_skb+0x27d/0x7d0 net/core/skbuff.c:713 alloc_skb include/linux/skbuff.h:1383 [inline] new_skb+0x2f/0x2b0 drivers/block/aoe/aoecmd.c:66 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:430 [inline] aoecmd_cfg+0x2b1/0x800 drivers/block/aoe/aoecmd.c:1374 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_notrace+0x4d/0x90 kernel/sched/core.c:7184 Code: b4 01 00 cc 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 e2 65 ff 05 cd 1b 6d 07 bf 01 00 00 00 e8 83 62 e6 f5 01 00 00 00 e8 e9 a6 ff ff 65 8b 05 b2 1b 6d 07 65 ff 0d ab 1b RSP: 0018:ffffc9000514f6d0 EFLAGS: 00000246 RAX: 1ffff1100f169669 RBX: ffffe8ffffa7f010 RCX: dffffc0000000000 RDX: ffffc900168f7000 RSI: 00000000000000bb RDI: ffffffff8baeb46d RBP: ffffc9000514f730 R08: ffffc9000514f66f R09: 0000000000000000 R10: ffffc9000514f660 R11: ffffffffa02019c8 R12: ffffe8ffffa7f025 R13: 000000000000000e R14: dffffc0000000000 R15: 1ffff92000a29ef0 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] perf_trace_lock_acquire+0x3a3/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4515 [inline] slab_alloc_node mm/slub.c:4844 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4863 sock_alloc_inode+0x28/0xc0 net/socket.c:322 alloc_inode+0x6a/0x1b0 fs/inode.c:347 new_inode_pseudo include/linux/fs.h:3003 [inline] sock_alloc net/socket.c:637 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1569 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd6/0x1b0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f529959c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f529a3a3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f5299816180 RCX: 00007f529959c799 RDX: 0000000000000084 RSI: 0000000000000005 RDI: 0000000000000002 RBP: 00007f5299632bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5299816218 R14: 00007f5299816180 R15: 00007ffe194f5598 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 18 Comm: rcu_exp_gp_kthr Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:kasan_check_range+0x5/0x2c0 mm/kasan/generic.c:199 Code: 48 c7 c6 e9 4d 16 8e e8 09 5e f8 fe 90 0f 0b cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d RSP: 0018:ffffc900001773a0 EFLAGS: 00000202 RAX: ffffffff81a5db01 RBX: 0000000000000010 RCX: ffffffff81a5dbd8 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90000177528 RBP: ffffffff8e658f80 R08: ffffffff8e658f97 R09: 1ffffffff1ccb1f2 R10: dffffc0000000000 R11: fffffbfff1ccb1f3 R12: ffffffff81a5dbd8 R13: 0000000000000002 R14: ffffffff8e658f88 R15: ffffc90000177528 FS: 0000000000000000(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faf80e17dac CR3: 000000004a944000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 desc_read+0x208/0x3f0 kernel/printk/printk_ringbuffer.c:496 desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1931 [inline] prb_read kernel/printk/printk_ringbuffer.c:1999 [inline] _prb_read_valid+0x766/0xa80 kernel/printk/printk_ringbuffer.c:2170 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2242 printk_get_next_message+0x18b/0x880 kernel/printk/printk.c:3052 console_emit_next_record kernel/printk/printk.c:3137 [inline] console_flush_one_record kernel/printk/printk.c:3269 [inline] console_flush_all+0x501/0xb20 kernel/printk/printk.c:3343 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479 _printk+0xdd/0x130 kernel/printk/printk.c:2504 synchronize_rcu_expedited_stall+0x5f/0x1160 kernel/rcu/tree_exp.h:570 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:673 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:692 [inline] rcu_exp_sel_wait_wake+0x897/0xe50 kernel/rcu/tree_exp.h:726 kthread_worker_fn+0x509/0xb70 kernel/kthread.c:1056 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245