================================================================== BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:393 [inline] BUG: KASAN: slab-out-of-bounds in hfs_bnode_read fs/hfs/bnode.c:35 [inline] BUG: KASAN: slab-out-of-bounds in hfs_bnode_read_key+0x2e7/0x430 fs/hfs/bnode.c:70 Write of size 94 at addr ffff88801f70b980 by task syz.3.316/6049 CPU: 1 PID: 6049 Comm: syz.3.316 Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:427 kasan_report+0x136/0x160 mm/kasan/report.c:531 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 memcpy_from_page include/linux/highmem.h:393 [inline] hfs_bnode_read fs/hfs/bnode.c:35 [inline] hfs_bnode_read_key+0x2e7/0x430 fs/hfs/bnode.c:70 hfs_brec_insert+0x69d/0xbd0 fs/hfs/brec.c:141 hfs_cat_create+0x419/0x8e0 fs/hfs/catalog.c:118 hfs_create+0x62/0xd0 fs/hfs/dir.c:202 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc48b18d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc48c01a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc48b3a6080 RCX: 00007fc48b18d169 RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c RBP: 00007fc48b20e990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc48b3a6080 R15: 00007ffdb8332be8 Allocated by task 6049: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xb2/0x230 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] hfs_find_init+0x8c/0x1e0 fs/hfs/bfind.c:21 hfs_cat_create+0x17d/0x8e0 fs/hfs/catalog.c:96 hfs_create+0x62/0xd0 fs/hfs/dir.c:202 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88801f70b980 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff88801f70b980, ffff88801f70b9e0) The buggy address belongs to the physical page: page:ffffea00007dc2c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f70b flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00007fe400 dead000000000006 ffff888017c41780 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 129, tgid 129 (kworker/0:2), ts 75264252732, free_ts 75259508973 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5606 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline] nsim_fib_event_nb+0xd8/0x1070 drivers/net/netdevsim/fib.c:1043 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x17c/0x2c0 kernel/notifier.c:225 call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:402 [inline] fib6_add_rt2node net/ipv6/ip6_fib.c:1228 [inline] fib6_add+0x1c50/0x3c50 net/ipv6/ip6_fib.c:1485 __ip6_ins_rt net/ipv6/route.c:1345 [inline] ip6_ins_rt+0x102/0x170 net/ipv6/route.c:1355 __ipv6_ifa_notify+0x5af/0x11b0 net/ipv6/addrconf.c:6217 ipv6_ifa_notify net/ipv6/addrconf.c:6256 [inline] addrconf_dad_completed+0x194/0xd30 net/ipv6/addrconf.c:4260 addrconf_dad_work+0xdbe/0x16e0 net/ipv6/addrconf.c:-1 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2586 put_cpu_partial+0x17b/0x250 mm/slub.c:2662 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] sock_alloc_inode+0x24/0xc0 net/socket.c:306 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1063 sock_alloc net/socket.c:631 [inline] __sock_create+0x11f/0x930 net/socket.c:1514 sock_create net/socket.c:1606 [inline] __sys_socket_create net/socket.c:1643 [inline] __sys_socket+0x136/0x3a0 net/socket.c:1671 __do_sys_socket net/socket.c:1684 [inline] __se_sys_socket net/socket.c:1682 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1682 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88801f70b880: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88801f70b900: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc >ffff88801f70b980: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff88801f70ba00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88801f70ba80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ==================================================================