INFO: task syz.3.176:6719 blocked for more than 143 seconds. Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.176 state:D stack:26032 pid:6719 tgid:6716 ppid:5832 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5377 [inline] __schedule+0xf43/0x5890 kernel/sched/core.c:6764 __schedule_loop kernel/sched/core.c:6841 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6856 kvm_swap_active_memslots+0x2e5/0x7c0 virt/kvm/kvm_main.c:1575 kvm_activate_memslot virt/kvm/kvm_main.c:1719 [inline] kvm_create_memslot virt/kvm/kvm_main.c:1785 [inline] kvm_set_memslot+0xd3b/0x1380 virt/kvm/kvm_main.c:1897 kvm_set_memory_region+0xe82/0x1610 virt/kvm/kvm_main.c:2045 kvm_set_internal_memslot+0x9f/0xe0 virt/kvm/kvm_main.c:2068 __x86_set_memory_region+0x2f7/0x740 arch/x86/kvm/x86.c:12848 kvm_alloc_apic_access_page+0x9e/0x110 arch/x86/kvm/lapic.c:2698 vmx_vcpu_create+0x5d4/0xcf0 arch/x86/kvm/vmx/vmx.c:7602 kvm_arch_vcpu_create+0x643/0xab0 arch/x86/kvm/x86.c:12307 kvm_vm_ioctl_create_vcpu virt/kvm/kvm_main.c:4115 [inline] kvm_vm_ioctl+0xf4f/0x3d70 virt/kvm/kvm_main.c:5064 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f804878cde9 RSP: 002b:00007f804953d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f80489a6080 RCX: 00007f804878cde9 RDX: 0000000000000038 RSI: 000000000000ae41 RDI: 0000000000000003 RBP: 00007f804880e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f80489a6080 R15: 00007ffeadeb43f8 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746 6 locks held by kworker/u8:16/6255: #0: ffff8880b863ed58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598 #1: ffff8880b8628a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987 #2: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] #2: ffffffff8e1bc140 (rcu_read_lock){....}-{1:3}, at: batadv_nc_worker+0x164/0x1060 net/batman-adv/network-coding.c:719 #3: ffffffff9a9aad58 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x149/0x4a0 lib/debugobjects.c:818 #4: ffffffff9aa72d20 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline] #4: ffffffff9aa72d20 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x1cf/0x600 lib/debugobjects.c:1129 #5: ffff8880b8628a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0x1a2/0x2d0 kernel/sched/psi.c:912 2 locks held by syz.3.176/6719: #0: ffffc900036890a8 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_alloc_apic_access_page+0x27/0x110 arch/x86/kvm/lapic.c:2693 #1: ffffc90003689138 (&kvm->slots_arch_lock){+.+.}-{4:4}, at: kvm_set_memslot+0x34/0x1380 virt/kvm/kvm_main.c:1848 2 locks held by getty/7079: #0: ffff888034e620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc9000a7632f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 2 locks held by syz.1.638/9077: 3 locks held by syz.1.638/9079: 2 locks held by syz.1.638/9080: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88807971c418 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88807971c418 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 3 locks held by syz.1.638/9081: 3 locks held by syz.1.638/9083: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff888078f0e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff888078f0e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 2 locks held by syz.1.638/9084: 3 locks held by syz.1.638/9085: 3 locks held by syz.1.638/9086: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88802794caa0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88802794caa0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9088: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88802794e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88802794e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9089: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff888027948fd8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff888027948fd8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9090: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88807d09de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88807d09de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 2 locks held by syz.1.638/9091: 3 locks held by syz.1.638/9092: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88805e902370 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88805e902370 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_lru_add mm/zswap.c:724 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1510 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x16af/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9094: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88807971de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88807971de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9095: 3 locks held by syz.1.638/9096: 3 locks held by syz.1.638/9097: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88802794b708 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88802794b708 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffff8880b863ed58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598 3 locks held by syz.1.638/9098: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88802794de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88802794de38 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9099: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff888048a157b0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff888048a157b0 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9100: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff888078f08950 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff888078f08950 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 3 locks held by syz.1.638/9101: #0: ffff888028dbe420 (sb_writers#5){.+.+}-{0:0}, at: get_signal+0x23f3/0x2610 kernel/signal.c:3021 #1: ffff88802794a370 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline] #1: ffff88802794a370 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3444 #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #2: ffffe8ffffc21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 2 locks held by kworker/u8:31/9189: #0: ffff88801eb2c148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3211 #1: ffffc9000b99fd18 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3212 1 lock held by syz.1.803/9854: #0: ffff8880255e0be0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:152 [inline] #0: ffff8880255e0be0 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x160/0x3a0 mm/util.c:573 2 locks held by syz.1.803/9855: #0: ffff8880255e0be0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:190 [inline] #0: ffff8880255e0be0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x21d/0x380 mm/gup.c:2011 #1: ffffe8ffffd21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: acomp_ctx_get_cpu_lock mm/zswap.c:905 [inline] #1: ffffe8ffffd21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_compress mm/zswap.c:937 [inline] #1: ffffe8ffffd21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store_page mm/zswap.c:1462 [inline] #1: ffffe8ffffd21250 (&per_cpu_ptr(pool->acomp_ctx, cpu)->mutex){+.+.}-{4:4}, at: zswap_store+0x910/0x2600 mm/zswap.c:1569 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] watchdog+0xf62/0x12b0 kernel/hung_task.c:399 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7825 Comm: kworker/u8:24 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:469 [inline] RIP: 0010:lock_release+0x3bc/0x6f0 kernel/locking/lockdep.c:5874 Code: 85 66 02 00 00 0b 05 c3 b5 eb 18 0f 84 87 01 00 00 48 c7 c7 c0 e8 6c 8b e8 f1 73 b0 09 b8 ff ff ff ff 65 0f c1 05 cc 68 6c 7e <83> f8 01 0f 85 fe 01 00 00 9c 58 f6 c4 02 0f 85 e9 01 00 00 48 f7 RSP: 0018:ffffc9000b93f9e0 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 1ffff92001727f3e RCX: ffffc9000b93fa30 RDX: 1ffff110043d8c9c RSI: ffffffff8b6ce8c0 RDI: ffffffff8bd2d220 RBP: 8f8d099f76068e08 R08: 0000000000000000 R09: fffffbfff20bfb02 R10: ffffffff905fd817 R11: 0000000000000002 R12: 0000000000000002 R13: 0000000000000003 R14: ffff888021ec64e8 R15: ffff888021ec5a00 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb6fb778ab8 CR3: 000000005f63a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:165 [inline] _raw_spin_unlock_bh+0x16/0x30 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x1c6/0x390 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x913/0x1060 net/batman-adv/network-coding.c:720 process_one_work+0x958/0x1b30 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244