aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P34/1:b..l rcu: (detected by 1, t=10502 jiffies, g=101017, q=37798 ncpus=2) task:kcompactd0 state:R running task stack:25224 pid:34 tgid:34 ppid:2 task_flags:0x210040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x14bc/0x5000 kernel/sched/core.c:6863 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 14 17 e0 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000aa6c18 EFLAGS: 00000206 RAX: d902689ec42ecc00 RBX: 0000000000000000 RCX: d902689ec42ecc00 RDX: 000000005a44979c RSI: ffffffff8d977b3e RDI: ffffffff8bc07ae0 RBP: ffffffff81743f85 R08: ffffffff81743f85 R09: ffffffff8df419e0 R10: ffffc90000aa6de8 R11: fffff52000154dc9 R12: 0000000000000002 R13: ffffffff8df419e0 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943 __folio_put+0x21b/0x2c0 mm/swap.c:112 migrate_folio_move mm/migrate.c:1412 [inline] migrate_folios_move mm/migrate.c:1721 [inline] migrate_pages_batch+0x22a3/0x35e0 mm/migrate.c:1977 migrate_pages_sync mm/migrate.c:2007 [inline] migrate_pages+0x1b9a/0x28e0 mm/migrate.c:2116 compact_zone+0x25ba/0x4760 mm/compaction.c:2647 kcompactd_do_work mm/compaction.c:3098 [inline] kcompactd+0x953/0x1250 mm/compaction.c:3192 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 rcu: rcu_preempt kthread starved for 10502 jiffies! g101017 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27040 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x14bc/0x5000 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0x165/0x360 kernel/sched/core.c:6960 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: 13 ee 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 73 00 0d 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffffff8dc07d80 EFLAGS: 000002c6 RAX: c1fe16b8ff197600 RBX: ffffffff8197919a RCX: c1fe16b8ff197600 RDX: 0000000000000001 RSI: ffffffff8d791132 RDI: ffffffff8bc07ae0 RBP: ffffffff8dc07ea8 R08: ffff8880b86336db R09: 1ffff110170c66db R10: dffffc0000000000 R11: ffffed10170c66dc R12: ffffffff8f820370 R13: 1ffffffff1b92a68 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125e37000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33f22ff8 CR3: 000000015c0ce000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x1ea/0x520 kernel/sched/idle.c:332 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430 rest_init+0x2de/0x300 init/main.c:757 start_kernel+0x3a7/0x400 init/main.c:1206 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x147 aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure aoe: skb alloc failure slab_out_of_memory: 269 callbacks suppressed SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 slab_out_of_memory: 177 callbacks suppressed SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48 SLUB: Unable to allocate memory on CPU 1 (of node 0) on node -1, gfp=0x920(GFP_ATOMIC|__GFP_ZERO) cache: kmalloc-96, object size: 96, buffer size: 128, default order: 0, min order: 0 node 0: slabs: 567, objs: 18144, free: 0 node 1: slabs: 110, objs: 3520, free: 48