================================================================== BUG: KASAN: invalid-access in copy_page+0x10/0xd0 arch/arm64/lib/copy_page.S:26 Read at addr fdff00001b4a0000 by task syz-executor.0/2222 Pointer tag: [fd], memory tag: [fb] CPU: 0 PID: 2222 Comm: syz-executor.0 Not tainted 6.0.0-rc6-syzkaller-00286-ga63f2e7cb110 #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace.part.0+0xd0/0xe0 arch/arm64/kernel/stacktrace.c:182 dump_backtrace arch/arm64/kernel/stacktrace.c:188 [inline] show_stack+0x18/0x50 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report+0x104/0x604 mm/kasan/report.c:433 kasan_report+0x8c/0xb0 mm/kasan/report.c:495 __do_kernel_fault+0x11c/0x1bc arch/arm64/mm/fault.c:319 do_bad_area arch/arm64/mm/fault.c:469 [inline] do_tag_check_fault+0x78/0x90 arch/arm64/mm/fault.c:742 do_mem_abort+0x44/0x9c arch/arm64/mm/fault.c:818 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:366 el1h_64_sync_handler+0xb0/0xd0 arch/arm64/kernel/entry-common.c:417 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576 copy_page+0x10/0xd0 arch/arm64/lib/copy_page.S:26 copy_user_highpage+0x18/0x50 arch/arm64/mm/copypage.c:34 __wp_page_copy_user mm/memory.c:2856 [inline] wp_page_copy+0xa0/0x6f0 mm/memory.c:3117 do_wp_page+0x140/0x660 mm/memory.c:3479 handle_pte_fault mm/memory.c:4929 [inline] __handle_mm_fault+0x664/0xe7c mm/memory.c:5053 handle_mm_fault+0xec/0x280 mm/memory.c:5151 __do_page_fault arch/arm64/mm/fault.c:502 [inline] do_page_fault+0x120/0x3d0 arch/arm64/mm/fault.c:602 do_mem_abort+0x44/0x9c arch/arm64/mm/fault.c:818 el0_da+0x30/0xbc arch/arm64/kernel/entry-common.c:502 el0t_64_sync_handler+0x68/0xc0 arch/arm64/kernel/entry-common.c:645 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:581 The buggy address belongs to the physical page: page:00000000b278b713 refcount:3 mapcount:2 mapping:0000000000000000 index:0xffffffffe pfn:0x5b4a0 memcg:f7ff00001f680000 anon flags: 0x1ffc0800208001c(uptodate|dirty|lru|swapbacked|arch_2|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x2) raw: 01ffc0800208001c fffffc0000461648 f7ff00001f677000 f9ff000007951c01 raw: 0000000ffffffffe 0000000000000000 0000000300000001 f7ff00001f680000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00001b49fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff00001b49ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff00001b4a0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff00001b4a0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff00001b4a0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================