================================================================== BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x17b/0x450 fs/hfs/bnode.c:37 Write of size 94 at addr ffff8880183fff80 by task syz.1.256/5361 CPU: 1 PID: 5361 Comm: syz.1.256 Not tainted 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 hfs_bnode_read+0x17b/0x450 fs/hfs/bnode.c:37 hfs_bnode_read_key+0x159/0x1f0 fs/hfs/bnode.c:73 hfs_brec_insert+0x809/0xbc0 fs/hfs/brec.c:159 hfs_cat_create+0x353/0x8d0 fs/hfs/catalog.c:118 hfs_create+0x62/0xd0 fs/hfs/dir.c:202 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x11e1/0x2f30 fs/namei.c:3739 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc4c1a19969 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:00007fc4bf860038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc4c1c41080 RCX: 00007fc4c1a19969 RDX: 000000000000275a RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007fc4c1a9bab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fc4c1c41080 R15: 00007ffd0b1a2098 Allocated by task 5361: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:609 [inline] hfs_find_init+0x84/0x1d0 fs/hfs/bfind.c:21 hfs_cat_create+0x175/0x8d0 fs/hfs/catalog.c:96 hfs_create+0x62/0xd0 fs/hfs/dir.c:202 lookup_open fs/namei.c:3462 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0x11e1/0x2f30 fs/namei.c:3739 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x10a/0x7c0 kernel/rcu/tree.c:3596 cfg80211_update_known_bss+0x177/0x9d0 net/wireless/scan.c:-1 cfg80211_bss_update+0x15f/0x2250 net/wireless/scan.c:1835 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2554 [inline] cfg80211_inform_bss_frame_data+0x873/0x1f30 net/wireless/scan.c:2587 ieee80211_bss_info_update+0x6c2/0xaa0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline] ieee80211_ibss_rx_queued_mgmt+0x16d0/0x29c0 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1456 [inline] ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1510 process_one_work+0x863/0x1000 kernel/workqueue.c:2310 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff8880183fff80 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff8880183fff80, ffff8880183fffe0) The buggy address belongs to the page: page:ffffea000060ffc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183ff flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000001900000001 ffff888016841780 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 2710404799, free_ts 2650042274 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5466 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2031 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc_trace+0x1a5/0x2a0 mm/slub.c:3245 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:735 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ut_evaluate_object+0xd8/0x4b0 drivers/acpi/acpica/uteval.c:50 acpi_ut_execute_HID+0xa3/0x350 drivers/acpi/acpica/utids.c:45 acpi_ev_is_pci_root_bridge+0x97/0x270 drivers/acpi/acpica/evrgnini.c:323 acpi_ev_pci_config_region_setup+0x247/0x720 drivers/acpi/acpica/evrgnini.c:191 acpi_ev_address_space_dispatch+0x1a2/0x9f0 drivers/acpi/acpica/evregion.c:172 acpi_ex_access_region+0x519/0x850 drivers/acpi/acpica/exfldio.c:246 acpi_ex_field_datum_io+0x290/0x6b0 drivers/acpi/acpica/exfldio.c:445 acpi_ex_extract_from_field+0x5bb/0x880 drivers/acpi/acpica/exfldio.c:690 acpi_ex_read_data_from_field+0x3f2/0x740 drivers/acpi/acpica/exfield.c:236 acpi_ex_resolve_node_to_value+0x2ab/0x660 drivers/acpi/acpica/exresnte.c:177 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2507 put_cpu_partial+0x12d/0x190 mm/slub.c:2587 qlist_free_all mm/kasan/quarantine.c:176 [inline] kasan_quarantine_remove_cache+0x19c/0x1e0 mm/kasan/quarantine.c:356 kmem_cache_shrink+0x9/0x20 mm/slab_common.c:538 acpi_os_purge_cache+0x11/0x20 drivers/acpi/osl.c:1663 acpi_purge_cached_objects+0x39/0xc0 drivers/acpi/acpica/utxface.c:237 acpi_initialize_objects+0x2a/0xa0 drivers/acpi/acpica/utxfinit.c:250 acpi_bus_init+0xcb/0x6f0 drivers/acpi/bus.c:1255 acpi_init+0xab/0x220 drivers/acpi/bus.c:1342 do_one_initcall+0x1ee/0x680 init/main.c:1302 do_initcall_level+0x137/0x1f0 init/main.c:1375 do_initcalls+0x4b/0x90 init/main.c:1391 kernel_init_freeable+0x3ce/0x560 init/main.c:1615 kernel_init+0x19/0x1b0 init/main.c:1506 Memory state around the buggy address: ffff8880183ffe80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880183fff00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880183fff80: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff888018400000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888018400080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================