loop5: rw=0, sector=8, nr_sectors = 16 limit=16 syz.5.1429: attempt to access beyond end of device loop5: rw=0, sector=8, nr_sectors = 16 limit=16 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy_to_page include/linux/highmem.h:403 [inline] BUG: KASAN: slab-out-of-bounds in z_erofs_transform_plain+0x39c/0x494 fs/erofs/decompressor.c:347 Read of size 4096 at addr ffff0000d03f4000 by task syz.5.1429/11080 CPU: 0 PID: 11080 Comm: syz.5.1429 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0xfc mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x258/0x290 mm/kasan/generic.c:189 memcpy+0x48/0x90 mm/kasan/shadow.c:65 memcpy_to_page include/linux/highmem.h:403 [inline] z_erofs_transform_plain+0x39c/0x494 fs/erofs/decompressor.c:347 z_erofs_decompress+0x9c/0xd4 fs/erofs/decompressor.c:435 z_erofs_decompress_pcluster fs/erofs/zdata.c:1159 [inline] z_erofs_decompress_queue+0x103c/0x1bf4 fs/erofs/zdata.c:1240 z_erofs_runqueue+0x1540/0x16a8 fs/erofs/zdata.c:-1 z_erofs_read_folio+0x2dc/0x5cc fs/erofs/zdata.c:1693 filemap_read_folio+0x134/0x384 mm/filemap.c:2490 filemap_fault+0x990/0xe98 mm/filemap.c:3340 __do_fault+0x11c/0x3d8 mm/memory.c:4278 do_read_fault mm/memory.c:4629 [inline] do_fault mm/memory.c:4758 [inline] handle_pte_fault mm/memory.c:5029 [inline] __handle_mm_fault mm/memory.c:5171 [inline] handle_mm_fault+0x1d04/0x3018 mm/memory.c:5292 __do_page_fault arch/arm64/mm/fault.c:499 [inline] do_page_fault+0x310/0x99c arch/arm64/mm/fault.c:583 do_translation_fault+0x94/0xc8 arch/arm64/mm/fault.c:667 do_mem_abort+0x70/0x198 arch/arm64/mm/fault.c:804 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x50/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:580 __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:-1 [inline] check_zeroed_user+0x1a4/0x3c0 lib/usercopy.c:76 copy_struct_from_user include/linux/uaccess.h:340 [inline] copy_min_struct_from_user security/landlock/syscalls.c:77 [inline] __do_sys_landlock_create_ruleset security/landlock/syscalls.c:203 [inline] __se_sys_landlock_create_ruleset security/landlock/syscalls.c:175 [inline] __arm64_sys_landlock_create_ruleset+0x1f4/0x4a4 security/landlock/syscalls.c:175 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 1: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:53 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc_node_track_caller+0xcc/0x174 mm/slab_common.c:956 kvasprintf+0x12c/0x204 lib/kasprintf.c:25 kvasprintf_const+0x154/0x2e4 lib/kasprintf.c:49 kobject_set_name_vargs+0xd8/0x1c8 lib/kobject.c:265 kobject_add_varg lib/kobject.c:360 [inline] kobject_init_and_add+0xec/0x194 lib/kobject.c:449 rx_queue_add_kobject net/core/net-sysfs.c:1061 [inline] net_rx_queue_update_kobjects+0x184/0x420 net/core/net-sysfs.c:1112 register_queue_kobjects net/core/net-sysfs.c:1772 [inline] netdev_register_kobject+0x1fc/0x2f4 net/core/net-sysfs.c:2017 register_netdevice+0xf28/0x1650 net/core/dev.c:10243 bond_create+0xa4/0x104 drivers/net/bonding/bond_main.c:6485 bonding_init+0xe8c/0x1548 drivers/net/bonding/bond_main.c:6569 do_one_initcall+0x278/0x9f0 init/main.c:1309 do_initcall_level+0x158/0x214 init/main.c:1382 do_initcalls+0x58/0xac init/main.c:1398 do_basic_setup+0x8c/0xa0 init/main.c:1417 kernel_init_freeable+0x35c/0x4f0 init/main.c:1637 kernel_init+0x24/0x1d8 init/main.c:1525 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 The buggy address belongs to the object at ffff0000d03f4000 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes inside of 128-byte region [ffff0000d03f4000, ffff0000d03f4080) The buggy address belongs to the physical page: page:00000000e8b7a915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1103f4 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 dead000000000100 dead000000000122 ffff0000c0002300 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d03f3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d03f3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d03f4000: 06 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d03f4080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d03f4100: 06 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================