loop2: detected capacity change from 0 to 64 ================================================================== BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x693/0x720 fs/hfs/trans.c:133 Write of size 1 at addr ffff8880289bbbce by task syz-executor.2/4786 CPU: 0 PID: 4786 Comm: syz-executor.2 Not tainted 6.1.0-rc8-syzkaller-00164-g4cee37b3a4e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x461 mm/kasan/report.c:395 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495 hfs_asc2mac+0x693/0x720 fs/hfs/trans.c:133 hfs_cat_build_key+0xc4/0x170 fs/hfs/catalog.c:28 hfs_lookup+0x1c6/0x310 fs/hfs/dir.c:31 __lookup_hash+0x117/0x180 fs/namei.c:1601 filename_create+0x1d6/0x4a0 fs/namei.c:3808 do_mkdirat+0x9d/0x310 fs/namei.c:4051 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x119/0x170 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7faefd28c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faefdf60168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007faefd3abf80 RCX: 00007faefd28c0d9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007faefd2e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff68785caf R14: 00007faefdf60300 R15: 0000000000022000 Allocated by task 4786: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0x5a/0xd0 mm/slab_common.c:968 kmalloc include/linux/slab.h:558 [inline] hfs_find_init+0x95/0x240 fs/hfs/bfind.c:21 hfs_lookup+0x102/0x310 fs/hfs/dir.c:28 __lookup_hash+0x117/0x180 fs/namei.c:1601 filename_create+0x1d6/0x4a0 fs/namei.c:3808 do_mkdirat+0x9d/0x310 fs/namei.c:4051 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x119/0x170 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:481 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3343 cfg80211_update_known_bss+0x827/0xa70 net/wireless/scan.c:1683 cfg80211_bss_update+0xf3/0x21d0 net/wireless/scan.c:1730 cfg80211_inform_single_bss_frame_data+0x761/0xfc0 net/wireless/scan.c:2499 cfg80211_inform_bss_frame_data+0xc3/0xc80 net/wireless/scan.c:2532 ieee80211_bss_info_update+0x35c/0xaf0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1a32/0x3190 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1630 [inline] ieee80211_iface_work+0xa4b/0xd30 net/mac80211/iface.c:1684 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Second to last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:481 kvfree_call_rcu+0x78/0x8f0 kernel/rcu/tree.c:3343 cfg80211_update_known_bss+0x827/0xa70 net/wireless/scan.c:1683 cfg80211_bss_update+0xf3/0x21d0 net/wireless/scan.c:1730 cfg80211_inform_single_bss_frame_data+0x761/0xfc0 net/wireless/scan.c:2499 cfg80211_inform_bss_frame_data+0xc3/0xc80 net/wireless/scan.c:2532 ieee80211_bss_info_update+0x35c/0xaf0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1a32/0x3190 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1630 [inline] ieee80211_iface_work+0xa4b/0xd30 net/mac80211/iface.c:1684 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff8880289bbb80 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 78 bytes inside of 96-byte region [ffff8880289bbb80, ffff8880289bbbe0) The buggy address belongs to the physical page: page:ffffea0000a26ec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880289bb300 pfn:0x289bb flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001ceed88 ffffea0000a4b6c8 ffff888012040300 raw: ffff8880289bb300 ffff8880289bb000 000000010000001b 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 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 6, tgid 6 (kworker/0:0), ts 265642334333, free_ts 265582572444 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4291 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5558 __alloc_pages_node include/linux/gfp.h:237 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x94/0x390 mm/slab.c:2570 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943 ____cache_alloc mm/slab.c:3019 [inline] ____cache_alloc mm/slab.c:3002 [inline] __do_cache_alloc mm/slab.c:3202 [inline] slab_alloc_node mm/slab.c:3250 [inline] __kmem_cache_alloc_node+0x44a/0x510 mm/slab.c:3549 kmalloc_trace+0x26/0x60 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0x121c/0x24a0 drivers/net/netdevsim/fib.c:1492 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x858/0x1090 kernel/workqueue.c:2438 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 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+0x65c/0xd90 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483 slab_destroy mm/slab.c:1615 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1635 cache_flusharray mm/slab.c:3360 [inline] ___cache_free+0x2ac/0x3d0 mm/slab.c:3423 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slab.c:3257 [inline] kmem_cache_alloc_node+0x28f/0x580 mm/slab.c:3537 __alloc_skb+0x214/0x300 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1267 [inline] alloc_skb_with_frags+0x97/0x6c0 net/core/skbuff.c:6126 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2719 sock_alloc_send_skb include/net/sock.h:1884 [inline] mld_newpack.isra.0+0x1b9/0x770 net/ipv6/mcast.c:1748 add_grhead+0x295/0x340 net/ipv6/mcast.c:1851 add_grec+0x1082/0x1560 net/ipv6/mcast.c:1989 mld_send_initial_cr.part.0+0xf6/0x230 net/ipv6/mcast.c:2236 mld_send_initial_cr net/ipv6/mcast.c:1232 [inline] ipv6_mc_dad_complete+0x1d4/0x690 net/ipv6/mcast.c:2247 Memory state around the buggy address: ffff8880289bba80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff8880289bbb00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff8880289bbb80: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff8880289bbc00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8880289bbc80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================