loop1: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0xc7/0x1c0 fs/hfsplus/bnode.c:32 Write of size 4026 at addr ffff8880756a7000 by task syz.1.960/8304 CPU: 0 PID: 8304 Comm: syz.1.960 Not tainted 5.15.161-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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 hfsplus_bnode_read+0xc7/0x1c0 fs/hfsplus/bnode.c:32 hfsplus_bnode_read_key+0x18c/0x2a0 fs/hfsplus/bnode.c:72 hfsplus_brec_insert+0x6e6/0xdd0 fs/hfsplus/brec.c:141 hfsplus_create_attr+0x49a/0x630 fs/hfsplus/attributes.c:252 __hfsplus_setxattr+0x6ed/0x22c0 fs/hfsplus/xattr.c:354 hfsplus_setxattr+0xac/0xe0 fs/hfsplus/xattr.c:434 hfsplus_security_setxattr+0x3c/0x50 fs/hfsplus/xattr_security.c:31 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x27e/0x2e0 fs/xattr.c:611 path_setxattr+0x1bc/0x2a0 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:642 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: 0033:0x7faef34cbb99 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:00007faef1f4c048 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007faef3659fa0 RCX: 00007faef34cbb99 RDX: 0000000020000080 RSI: 0000000020000100 RDI: 00000000200000c0 RBP: 00007faef354c77e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007faef3659fa0 R15: 00007ffc1d915498 Allocated by task 8304: 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] hfsplus_find_init+0x81/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_create_attr+0x15d/0x630 fs/hfsplus/attributes.c:216 __hfsplus_setxattr+0x6ed/0x22c0 fs/hfsplus/xattr.c:354 hfsplus_setxattr+0xac/0xe0 fs/hfsplus/xattr.c:434 hfsplus_security_setxattr+0x3c/0x50 fs/hfsplus/xattr_security.c:31 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x27e/0x2e0 fs/xattr.c:611 path_setxattr+0x1bc/0x2a0 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:642 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 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087 qdisc_put net/sched/sch_generic.c:1044 [inline] dev_shutdown+0x5b6/0x6d0 net/sched/sch_generic.c:1408 unregister_netdevice_many+0xac3/0x18f0 net/core/dev.c:11087 default_device_exit_batch+0x390/0x3f0 net/core/dev.c:11627 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x763/0xb60 net/core/net_namespace.c:599 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:300 The buggy address belongs to the object at ffff8880756a7000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes inside of 1024-byte region [ffff8880756a7000, ffff8880756a7400) The buggy address belongs to the page: page:ffffea0001d5a800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x756a0 head:ffffea0001d5a800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001954400 0000000400000004 ffff888011c41dc0 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 2660, ts 222125656119, free_ts 221332840722 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5423 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] __kmalloc+0x1c9/0x300 mm/slub.c:4403 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] neigh_alloc net/core/neighbour.c:438 [inline] ___neigh_create+0x6be/0x2220 net/core/neighbour.c:591 ip6_finish_output2+0x11aa/0x14f0 net/ipv6/ip6_output.c:123 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:509 addrconf_dad_completed+0x75f/0xc40 net/ipv6/addrconf.c:4277 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 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300 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_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1b7/0x210 mm/slub.c:2507 put_cpu_partial+0x132/0x1a0 mm/slub.c:2587 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] __kmalloc_node+0x151/0x390 mm/slub.c:4451 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x80/0x140 mm/util.c:619 kvmalloc include/linux/mm.h:805 [inline] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x1fe/0xd10 fs/seq_file.c:210 call_read_iter include/linux/fs.h:2166 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0xa9f/0xe10 fs/read_write.c:485 ksys_read+0x1a2/0x2c0 fs/read_write.c:623 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 Memory state around the buggy address: ffff8880756a7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880756a7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880756a7200: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880756a7280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880756a7300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================