watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz.2.549:9394] Modules linked in: irq event stamp: 101107 hardirqs last enabled at (101106): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (101106): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (101107): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (101107): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (93998): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (94006): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (94006): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 1 UID: 0 PID: 9394 Comm: syz.2.549 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 : arch_local_irq_restore+0x8/0xc arch/arm64/include/asm/irqflags.h:197 lr : lock_is_held_type+0x150/0x1a8 kernel/locking/lockdep.c:5899 sp : ffff80009bbe74f0 x29: ffff80009bbe74f0 x28: 1ffff0001377cee0 x27: 0000000000000000 x26: ffff0000d7823c80 x25: ffff80008f75f4c0 x24: ffff80008f8bd960 x23: 0000000000000000 x22: ffff0000d7824700 x21: ffff0000cea86398 x20: 0000000000000001 x19: 0000000000000000 x18: ffff80009bbe74a0 x17: 000000000003f8ad x16: ffff8000803541a4 x15: 0000000000000003 x14: 1ffff0001377cee4 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000040000 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : ffff80008b625160 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore+0x8/0xc arch/arm64/include/asm/irqflags.h:195 (P) lock_is_held_type+0x150/0x1a8 kernel/locking/lockdep.c:5899 (L) lock_is_held include/linux/lockdep.h:249 [inline] xa_head include/linux/xarray.h:1204 [inline] xas_start+0x1bc/0x6c4 lib/xarray.c:190 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: 9765 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 : folios_put_refs+0x580/0x878 mm/swap.c:960 lr : folios_put_refs+0x278/0x878 mm/swap.c:979 sp : ffff80009e397100 x29: ffff80009e3971e0 x28: fffffdffc4050980 x27: ffff80009e3973d0 x26: ffff80009e3972a8 x25: 0000000000000002 x24: 0000000000000004 x23: dfff800000000000 x22: fffffdffc40509b4 x21: 0000000000000001 x20: ffff80009e3973c0 x19: ffff80009e397280 x18: 1fffe000366c6c76 x17: ffff80008f80d000 x16: ffff8000830ce3b0 x15: 0000000000000001 x14: 1fffffbff880a136 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7fbff880a137 x10: 0000000000ff0100 x9 : 0000000000000005 x8 : 000000000000001f x7 : ffff80008097fed0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080899b98 x2 : 0000000000000001 x1 : 0000000000000002 x0 : 0000000000000000 Call trace: folios_put_refs+0x580/0x878 mm/swap.c:960 (P) folios_put_refs+0x278/0x878 mm/swap.c:979 (L) free_pages_and_swap_cache+0x254/0x4d0 mm/swap_state.c:332 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x15c/0x398 mm/mmu_gather.c:373 tlb_finish_mmu+0xc8/0x20c mm/mmu_gather.c:465 exit_mmap+0x3bc/0xc00 mm/mmap.c:1936 __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