watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz.5.540:9023] Modules linked in: irq event stamp: 5649 hardirqs last enabled at (5648): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (5648): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (5649): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (5649): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (276): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (284): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (284): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 1 UID: 0 PID: 9023 Comm: syz.5.540 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 : __sanitizer_cov_trace_pc+0x0/0x84 kernel/kcov.c:210 lr : xa_head include/linux/xarray.h:1204 [inline] lr : xas_start+0x1d4/0x6c4 lib/xarray.c:190 sp : ffff80009c657540 x29: ffff80009c657540 x28: 1ffff000138caee0 x27: 0000000000000000 x26: dfff800000000000 x25: 1ffff000138caee3 x24: dfff800000000000 x23: ffff0000d73b4880 x22: 0000000000000001 x21: ffff80009c657718 x20: ffff80009c657700 x19: 0000000000000000 x18: ffff80009c6574a0 x17: 000000000004322b x16: ffff800080585ea8 x15: 0000000000000003 x14: 1ffff000138caee4 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000040000 x10: 0000000000ff0100 x9 : 0000000000000002 x8 : ffff0000c79adac0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: __sanitizer_cov_trace_pc+0x0/0x84 kernel/audit_tree.c:174 (P) xa_head include/linux/xarray.h:1204 [inline] (L) xas_start+0x1d4/0x6c4 lib/xarray.c:190 (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: 9036 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: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : lock_release+0x534/0x9e8 lr : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] lr : lock_release+0x4fc/0x9e8 kernel/locking/lockdep.c:5848 sp : ffff80009d626dc0 x29: ffff80009d626e80 x28: 0000000000000000 x27: dfff800000000000 x26: 1fffe000199708df x25: ffff0000ccb84778 x24: ffff0000ccb83c80 x23: ffff0000ccb846f8 x22: 0000000000000003 x21: 00000000ffe2000a x20: e64c3f22348dc4a6 x19: ffff0001b36364c0 x18: 1fffe0001b064524 x17: ffff80008f80d000 x16: ffff8000830ce3b0 x15: 0000000000000001 x14: 1fffe00018100d2d x13: 0000000000000000 x12: 0000000000000000 x11: ffff600018100d2e x10: 0000000000000003 x9 : ffff80008f75f4c0 x8 : 00000000000000c0 x7 : ffff800080b7cb08 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080b7d308 x2 : 0000000000000001 x1 : ffff80008b625160 x0 : 0000000000000000 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) lock_release+0x534/0x9e8 kernel/locking/lockdep.c:5849 (P) lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] (L) lock_release+0x4fc/0x9e8 kernel/locking/lockdep.c:5848 (L) rcu_lock_release+0x30/0x40 include/linux/rcupdate.h:347 rcu_read_unlock include/linux/rcupdate.h:880 [inline] page_ext_put+0xb4/0xd0 mm/page_ext.c:550 page_table_check_clear+0x384/0x3f8 mm/page_table_check.c:94 __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