watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2426] Modules linked in: irq event stamp: 65036187 hardirqs last enabled at (65036186): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (65036186): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (65036187): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (65036187): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (1388): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1394): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2426 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] pc : _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] lr : _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 sp : ffff8000a2ae76c0 x29: ffff8000a2ae76c0 x28: ffff0000d0e12070 x27: 0000000000000000 x26: ffff0000d0e12000 x25: ffff0000ce0a8238 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff80009147efc0 x20: ffff80009799ae20 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093605000 x16: ffff80008052bc24 x15: 0000000000000001 x14: 1ffff00012f335c4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093404c28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e3d860 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ee54d8e x0 : ffff80010c40c000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 (P) spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline] uart_port_unlock_deref+0x108/0x2ec drivers/tty/serial/serial_core.c:91 uart_write_room+0xa4/0x15c drivers/tty/serial/serial_core.c:650 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:69 handle_tx+0x128/0x5fc drivers/net/caif/caif_serial.c:212 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:268 __netdev_start_xmit include/linux/netdevice.h:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3855 __dev_queue_xmit+0x1600/0x32a8 net/core/dev.c:4725 dev_queue_xmit include/linux/netdevice.h:3361 [inline] tx+0x9c/0x1cc drivers/block/aoe/aoenet.c:62 kthread+0x164/0x354 drivers/block/aoe/aoecmd.c:1241 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6526 Comm: sshd-session Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : kasan_shadow_to_mem mm/kasan/kasan.h:326 [inline] pc : addr_has_metadata mm/kasan/kasan.h:334 [inline] pc : check_region_inline mm/kasan/generic.c:177 [inline] pc : kasan_check_range+0x30/0x2a4 mm/kasan/generic.c:189 lr : __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31 sp : ffff80009f8770d0 x29: ffff80009f8770d0 x28: 0000000000000007 x27: fffffdffc36c4c40 x26: fffffdffc36c4c00 x25: fffffdffc36c4c40 x24: 1ffff00011e2fd70 x23: 0000000000000000 x22: dfff800000000000 x21: 0000000000000003 x20: fffffdffc36c4c50 x19: fffffdffc36c4c40 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008b065bd0 x15: 0000000000000001 x14: 1fffe000337752e0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337752e1 x10: fffffffffffffff8 x9 : 000000000000002d x8 : fffffdffc36c4c54 x7 : ffff800080bcdcd0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080b98b70 x2 : 0000000000000000 x1 : 0000000000000004 x0 : fffffdffc36c4c50 Call trace: addr_has_metadata mm/kasan/kasan.h:334 [inline] (P) check_region_inline mm/kasan/generic.c:177 [inline] (P) kasan_check_range+0x30/0x2a4 mm/kasan/generic.c:189 (P) __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] folio_large_mapcount include/linux/mm.h:1114 [inline] free_tail_page_prepare+0x100/0x3d0 mm/page_alloc.c:1110 free_pages_prepare mm/page_alloc.c:1368 [inline] __free_frozen_pages+0x80c/0xcac mm/page_alloc.c:2895 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2933 __free_slab+0x104/0x1c8 mm/slub.c:2729 free_slab+0x24/0x120 mm/slub.c:2752 discard_slab mm/slub.c:2758 [inline] __put_partials+0x194/0x228 mm/slub.c:3223 put_cpu_partial+0x164/0x1c0 mm/slub.c:3298 __slab_free+0x1a0/0x25c mm/slub.c:4565 do_slab_free mm/slub.c:4647 [inline] ___cache_free+0x150/0x170 mm/slub.c:4753 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4191 [inline] slab_alloc_node mm/slub.c:4240 [inline] kmem_cache_alloc_node_noprof+0x240/0x3f4 mm/slub.c:4292 __alloc_skb+0x144/0x2ec net/core/skbuff.c:659 alloc_skb_fclone include/linux/skbuff.h:1386 [inline] tcp_stream_alloc_skb+0x44/0x2c4 net/ipv4/tcp.c:892 tcp_sendmsg_locked+0xb18/0x4774 net/ipv4/tcp.c:1198 tcp_sendmsg+0x40/0x64 net/ipv4/tcp.c:1393 inet_sendmsg+0x154/0x284 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] sock_write_iter+0x25c/0x378 net/socket.c:1179 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596