================================================================== BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x179/0x2a0 fs/hfs/bnode.c:37 Write of size 94 at addr ffff88805d850680 by task syz.4.274/5391 CPU: 0 PID: 5391 Comm: syz.4.274 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 hfs_bnode_read+0x179/0x2a0 fs/hfs/bnode.c:37 hfs_bnode_read_key+0x16e/0x240 fs/hfs/bnode.c:73 hfs_brec_insert+0x7ef/0xbd0 fs/hfs/brec.c:159 hfs_cat_create+0x419/0xa60 fs/hfs/catalog.c:118 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065 do_mkdirat+0x260/0x520 fs/namei.c:4090 __do_sys_mkdir fs/namei.c:4110 [inline] __se_sys_mkdir fs/namei.c:4108 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4108 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5ab3a3ede9 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:00007f5ab1887038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f5ab3c58080 RCX: 00007f5ab3a3ede9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000300 RBP: 00007f5ab3ac02a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f5ab3c58080 R15: 00007ffe43845848 Allocated by task 5391: 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+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x168/0x300 mm/slub.c:4407 kmalloc include/linux/slab.h:596 [inline] hfs_find_init+0x8c/0x1e0 fs/hfs/bfind.c:21 hfs_cat_create+0x17e/0xa60 fs/hfs/catalog.c:96 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065 do_mkdirat+0x260/0x520 fs/namei.c:4090 __do_sys_mkdir fs/namei.c:4110 [inline] __se_sys_mkdir fs/namei.c:4108 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4108 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3596 cfg80211_update_known_bss+0x16b/0x9e0 cfg80211_bss_update+0x187/0x2280 net/wireless/scan.c:1800 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2519 [inline] cfg80211_inform_bss_frame_data+0xa13/0x20f0 net/wireless/scan.c:2552 ieee80211_bss_info_update+0x7a6/0xc80 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+0x175e/0x2af0 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1456 [inline] ieee80211_iface_work+0x78f/0xcc0 net/mac80211/iface.c:1510 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Second to last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3596 cfg80211_update_known_bss+0x16b/0x9e0 cfg80211_bss_update+0x187/0x2280 net/wireless/scan.c:1800 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2519 [inline] cfg80211_inform_bss_frame_data+0xa13/0x20f0 net/wireless/scan.c:2552 ieee80211_bss_info_update+0x7a6/0xc80 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+0x175e/0x2af0 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1456 [inline] ieee80211_iface_work+0x78f/0xcc0 net/mac80211/iface.c:1510 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88805d850680 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff88805d850680, ffff88805d8506e0) The buggy address belongs to the page: page:ffffea0001761400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805d850780 pfn:0x5d850 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001cb7e40 0000001100000011 ffff888017441780 raw: ffff88805d850780 000000008020001a 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 4214, ts 61564517597, free_ts 17730430936 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192 __alloc_pages+0x272/0x700 mm/page_alloc.c:5465 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 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+0x1a0/0x290 mm/slub.c:3245 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:979 [inline] nsim_fib_event_nb+0xe4/0xfa0 drivers/net/netdevsim/fib.c:1032 notifier_call_chain kernel/notifier.c:83 [inline] atomic_notifier_call_chain+0x15f/0x290 kernel/notifier.c:198 call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:401 [inline] fib6_add_rt2node net/ipv6/ip6_fib.c:1227 [inline] fib6_add+0x1b66/0x3c80 net/ipv6/ip6_fib.c:1484 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_ins_rt+0x102/0x170 net/ipv6/route.c:1312 __ipv6_ifa_notify+0x5b9/0x11d0 net/ipv6/addrconf.c:6175 ipv6_ifa_notify net/ipv6/addrconf.c:6214 [inline] addrconf_dad_completed+0x18a/0xc40 net/ipv6/addrconf.c:4239 addrconf_dad_work+0xdd0/0x1720 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 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+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 free_contig_range+0x95/0xf0 mm/page_alloc.c:9384 destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331 do_one_initcall+0x22b/0x7a0 init/main.c:1302 do_initcall_level+0x157/0x210 init/main.c:1375 do_initcalls+0x49/0x90 init/main.c:1391 kernel_init_freeable+0x425/0x5c0 init/main.c:1615 kernel_init+0x19/0x290 init/main.c:1506 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff88805d850580: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff88805d850600: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff88805d850680: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff88805d850700: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff88805d850780: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================