watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz.2.34:6697] Modules linked in: irq event stamp: 4561 hardirqs last enabled at (4560): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (4560): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (4561): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (4561): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (184): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (192): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (192): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 1 UID: 0 PID: 6697 Comm: syz.2.34 Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : xas_start+0x334/0x6c4 lr : xas_start+0x324/0x6c4 lib/xarray.c:193 sp : ffff8000a3fc7540 x29: ffff8000a3fc7540 x28: 1ffff000147f8ee0 x27: 0000000000000000 x26: dfff800000000000 x25: 1ffff000147f8ee3 x24: dfff800000000000 x23: ffff0000d0f52000 x22: 0000000000000000 x21: ffff8000a3fc7718 x20: 000000006e66963f x19: 0000000000000000 x18: ffff8000a3fc74a0 x17: 0000000000022f08 x16: ffff800080585ea8 x15: 0000000000000003 x14: 1ffff000147f8ee4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7000147f8ee7 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 000000006e66963f x0 : 0000000000000000 Call trace: set_bounds lib/xarray.c:170 [inline] (P) xas_start+0x334/0x6c4 lib/xarray.c:193 (P) xas_start+0x324/0x6c4 lib/xarray.c:193 (L) xas_load+0x3c/0x50c lib/xarray.c:238 xas_store+0x94/0x1470 lib/xarray.c:790 __xa_erase+0x11c/0x1e0 lib/xarray.c:1511 sock_devmem_dontneed+0x2a0/0x5fc net/core/sock.c:1089 sk_setsockopt+0x7b4/0x3150 net/core/sock.c:1280 sock_setsockopt+0x68/0x80 net/core/sock.c:1633 do_sock_setsockopt+0x238/0x4e0 net/socket.c:2330 __sys_setsockopt+0x128/0x1a8 net/socket.c:2357 __do_sys_setsockopt net/socket.c:2366 [inline] __se_sys_setsockopt net/socket.c:2363 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2363 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6420 Comm: syz-executor Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] pc : rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] pc : rcu_is_watching+0xa8/0x18c kernel/rcu/tree.c:737 lr : rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] lr : rcu_is_watching+0x5c/0x18c kernel/rcu/tree.c:737 sp : ffff8000a43a6d60 x29: ffff8000a43a6d70 x28: ffff0000dca8a000 x27: dfff800000000000 x26: ffff8000a43a7600 x25: fffffdffc399a440 x24: dfff800000000000 x23: fffffdffbf00000f x22: 1fffe0001cf7f3c9 x21: dfff800000000000 x20: ffff0001b3644e80 x19: ffff0000e7bf9e48 x18: 1fffe00019466524 x17: ffff80008f80d000 x16: ffff8000830ce3b0 x15: 0000000000000001 x14: ffff80008f8105d8 x13: dfff800000000000 x12: 000000000867da72 x11: 00000000a9433ead x10: 0000000000000003 x9 : ffff80008f76de78 x8 : 0000000000000000 x7 : ffff800080b7e984 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff80008bb77140 x0 : 0000000000000000 Call trace: raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P) rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] (P) rcu_is_watching+0xa8/0x18c kernel/rcu/tree.c:737 (P) rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] (L) rcu_is_watching+0x5c/0x18c kernel/rcu/tree.c:737 (L) trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0xdc/0x9e8 kernel/locking/lockdep.c:5836 rcu_lock_release+0x30/0x40 include/linux/rcupdate.h:347 rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline] pfn_valid+0x3ac/0x418 include/linux/mmzone.h:2053 page_table_check_clear+0x34/0x3f8 mm/page_table_check.c:70 __page_table_check_pte_clear+0xa0/0xc0 mm/page_table_check.c:169 page_table_check_pte_clear include/linux/page_table_check.h:49 [inline] __ptep_get_and_clear arch/arm64/include/asm/pgtable.h:1284 [inline] __get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1307 [inline] get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1708 [inline] zap_present_folio_ptes mm/memory.c:1496 [inline] zap_present_ptes mm/memory.c:1579 [inline] zap_pte_range mm/memory.c:1621 [inline] zap_pmd_range mm/memory.c:1739 [inline] zap_pud_range mm/memory.c:1768 [inline] zap_p4d_range mm/memory.c:1789 [inline] unmap_page_range+0x2650/0x2e3c mm/memory.c:1810 unmap_single_vma mm/memory.c:1856 [inline] unmap_vmas+0x378/0x598 mm/memory.c:1900 exit_mmap+0x1dc/0xc00 mm/mmap.c:1923 __mmput+0xec/0x338 kernel/fork.c:1348 mmput+0x70/0xac kernel/fork.c:1370 exit_mm+0x148/0x210 kernel/exit.c:571 do_exit+0x470/0x1ad0 kernel/exit.c:926 do_group_exit+0x194/0x22c kernel/exit.c:1088 get_signal+0x1410/0x152c kernel/signal.c:2918 do_signal+0x23c/0x391c arch/arm64/kernel/signal.c:1645 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600