watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz.0.26:6594] Modules linked in: irq event stamp: 6163 hardirqs last enabled at (6162): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (6162): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (6163): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (6163): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (468): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (476): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (476): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 1 UID: 0 PID: 6594 Comm: syz.0.26 Not tainted 6.12.0-rc6-syzkaller-g563047e691f2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_kcov_mode kernel/kcov.c:185 [inline] pc : __sanitizer_cov_trace_pc+0x4c/0x84 kernel/kcov.c:217 lr : sock_devmem_dontneed+0x3e4/0x5fc net/core/sock.c:1088 sp : ffff8000aff977b0 x29: ffff8000aff978e0 x28: ffff8000aff97a30 x27: 0000000000000000 x26: ffff0000d5a8b600 x25: ffff0000d5a8b604 x24: 0000000020000000 x23: 0000000079732f63 x22: ffff0000d6761280 x21: dfff800000000000 x20: 00000000074f4abf x19: ffff8000aff97820 x18: ffff8000aff974a0 x17: 000000000001ca59 x16: ffff800080586484 x15: 0000000000000003 x14: 1ffff00015ff2ee4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff8000aff97712 x10: 0000000000ff0100 x9 : 0000000000000201 x8 : ffff0000cc32bc80 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: check_kcov_mode kernel/kcov.c:183 [inline] (P) __sanitizer_cov_trace_pc+0x4c/0x84 kernel/kcov.c:217 (P) sock_devmem_dontneed+0x3e4/0x5fc net/core/sock.c:1088 (L) 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: 6616 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller-g563047e691f2 #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 : __nr_to_section include/linux/mmzone.h:1880 [inline] pc : __pfn_to_section include/linux/mmzone.h:1988 [inline] pc : pfn_valid+0x4c/0x418 include/linux/mmzone.h:2041 lr : pfn_valid+0x2c/0x418 include/linux/mmzone.h:2036 sp : ffff8000b0246ee0 x29: ffff8000b0246ee0 x28: ffff0000d6dfc800 x27: 1fffe0001c69faf2 x26: ffff8000b0247600 x25: fffffdffc362e900 x24: dfff800000000000 x23: ffff80008fadc3c0 x22: ffff0000d6dfc800 x21: 0000000000000001 x20: 0000000000000000 x19: 0000000000118ba4 x18: 1fffe000194cf1c4 x17: ffff80008f80d000 x16: ffff8000830cb670 x15: 0000000000000001 x14: 1fffe0001c69faf2 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001c69faf3 x10: 0000000000ff0100 x9 : dfff800000000000 x8 : 0000000000000000 x7 : ffff800080b7af04 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008094fab0 x2 : 0000000000000001 x1 : 0000000000118ba4 x0 : 0010000000000000 Call trace: __nr_to_section include/linux/mmzone.h:1880 [inline] (P) __pfn_to_section include/linux/mmzone.h:1988 [inline] (P) pfn_valid+0x4c/0x418 include/linux/mmzone.h:2041 (P) pfn_valid+0x2c/0x418 include/linux/mmzone.h:2036 (L) 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/0xc04 mm/mmap.c:1913 __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:2917 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