hfsplus: request for non-existent node 134217728 in B*Tree
hfsplus: request for non-existent node 134217728 in B*Tree
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x84/0x24c fs/hfsplus/bnode.c:32
Read of size 8 at addr ffff0000c08762e0 by task syz.6.357/6101

CPU: 1 PID: 6101 Comm: syz.6.357 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309
 hfsplus_bnode_read+0x84/0x24c fs/hfsplus/bnode.c:32
 hfsplus_bnode_dump+0x2c4/0x4cc
 hfsplus_brec_remove+0x3d0/0x4a4 fs/hfsplus/brec.c:229
 __hfsplus_delete_attr+0x1e0/0x3ec fs/hfsplus/attributes.c:299
 hfsplus_delete_attr+0x2e4/0x41c fs/hfsplus/attributes.c:345
 hfsplus_removexattr fs/hfsplus/xattr.c:794 [inline]
 __hfsplus_setxattr+0xa80/0x1df0 fs/hfsplus/xattr.c:275
 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434
 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30
 __vfs_removexattr+0x370/0x38c fs/xattr.c:470
 __vfs_removexattr_locked+0x1d8/0x380 fs/xattr.c:505
 vfs_removexattr+0xe0/0x23c fs/xattr.c:527
 removexattr fs/xattr.c:857 [inline]
 path_removexattr+0x1ec/0x2ec fs/xattr.c:871
 __do_sys_removexattr fs/xattr.c:885 [inline]
 __se_sys_removexattr fs/xattr.c:882 [inline]
 __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:882
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Allocated by task 6101:
 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+0xbc/0xfc mm/kasan/common.c:513
 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x29c/0x4c8 mm/slub.c:4407
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 __hfs_bnode_create+0xe4/0x864 fs/hfsplus/bnode.c:416
 hfsplus_bnode_find+0x200/0xcb0 fs/hfsplus/bnode.c:497
 hfsplus_brec_find+0x134/0x4a0 fs/hfsplus/bfind.c:172
 hfsplus_find_attr+0x1e0/0x33c
 hfsplus_attr_exists+0x154/0x1c8 fs/hfsplus/attributes.c:182
 __hfsplus_setxattr+0x384/0x1df0 fs/hfsplus/xattr.c:336
 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434
 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30
 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x250/0x2b4 fs/xattr.c:611
 path_setxattr+0x17c/0x258 fs/xattr.c:630
 __do_sys_setxattr fs/xattr.c:646 [inline]
 __se_sys_setxattr fs/xattr.c:642 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Last potentially related work creation:
 kasan_save_stack+0x38/0x68 mm/kasan/common.c:38
 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3007 [inline]
 call_rcu+0x118/0xb40 kernel/rcu/tree.c:3087
 free_fib_info+0x68/0xa8 net/ipv4/fib_semantics.c:255
 fib_create_info+0x1488/0x1e18 net/ipv4/fib_semantics.c:1608
 fib_table_insert+0x1bc/0x1550 net/ipv4/fib_trie.c:1231
 fib_magic net/ipv4/fib_frontend.c:1092 [inline]
 fib_add_ifaddr+0x368/0x122c net/ipv4/fib_frontend.c:1114
 fib_netdev_event+0x564/0x6d4 net/ipv4/fib_frontend.c:1474
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391
 __dev_notify_flags+0x2ac/0x534
 dev_change_flags+0xc8/0x154 net/core/dev.c:8897
 do_setlink+0xac4/0x3134 net/core/rtnetlink.c:2776
 __rtnl_newlink net/core/rtnetlink.c:3447 [inline]
 rtnl_newlink+0x1294/0x1acc net/core/rtnetlink.c:3569
 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5647
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5665
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the object at ffff0000c0876200
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 224 bytes inside of
 256-byte region [ffff0000c0876200, ffff0000c0876300)
The buggy address belongs to the page:
page:0000000049255921 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100876
head:0000000049255921 order:1 compound_mapcount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc0003021900 0000000300000003 ffff0000c0002480
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c0876180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c0876200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000c0876280: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff0000c0876300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c0876380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Unable to handle kernel paging request at virtual address ffff62f80000c0a7
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004
  CM = 0, WnR = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ae196000
[ffff62f80000c0a7] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6101 Comm: syz.6.357 Tainted: G    B             5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : bytes_is_nonzero mm/kasan/generic.c:85 [inline]
pc : memory_is_nonzero mm/kasan/generic.c:102 [inline]
pc : memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
pc : memory_is_poisoned mm/kasan/generic.c:159 [inline]
pc : check_region_inline mm/kasan/generic.c:180 [inline]
pc : kasan_check_range+0x74/0x2b4 mm/kasan/generic.c:189
lr : memcpy+0x90/0xe8 mm/kasan/shadow.c:65
sp : ffff8000217a6f10
x29: ffff8000217a6f10 x28: 00000000000000ff x27: dfff800000000000
x26: ffff8000217a7040 x25: 1ffff000028a79eb x24: 0000000000000001
x23: ffff8000171c7000 x22: ffff800008fc3718 x21: ffff8000217a7020
x20: ffff17c00006053f x19: 0000000000000001 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800011b4da70 x15: 00000000000000ff
x14: ffff0000d778d1c0 x13: 0000000000ff0100 x12: 0000000000000001
x11: 1fffe2f80000c0a7 x10: 1fffe2f80000c0a7 x9 : ffffffffffffffff
x8 : ffff62f80000c0a7 x7 : 0000000000000000 x6 : 00000000000000ff
x5 : ffff8000217a7042 x4 : ffff0000ecc6e00c x3 : ffff800008fc3718
x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff17c00006053f
Call trace:
 bytes_is_nonzero mm/kasan/generic.c:84 [inline]
 memory_is_nonzero mm/kasan/generic.c:102 [inline]
 memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
 memory_is_poisoned mm/kasan/generic.c:159 [inline]
 check_region_inline mm/kasan/generic.c:180 [inline]
 kasan_check_range+0x74/0x2b4 mm/kasan/generic.c:189
 memcpy+0x90/0xe8 mm/kasan/shadow.c:65
 hfsplus_bnode_read+0x120/0x24c fs/hfsplus/bnode.c:32
 hfsplus_bnode_dump+0x2c4/0x4cc
 hfsplus_brec_remove+0x3d0/0x4a4 fs/hfsplus/brec.c:229
 __hfsplus_delete_attr+0x1e0/0x3ec fs/hfsplus/attributes.c:299
 hfsplus_delete_attr+0x2e4/0x41c fs/hfsplus/attributes.c:345
 hfsplus_removexattr fs/hfsplus/xattr.c:794 [inline]
 __hfsplus_setxattr+0xa80/0x1df0 fs/hfsplus/xattr.c:275
 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434
 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30
 __vfs_removexattr+0x370/0x38c fs/xattr.c:470
 __vfs_removexattr_locked+0x1d8/0x380 fs/xattr.c:505
 vfs_removexattr+0xe0/0x23c fs/xattr.c:527
 removexattr fs/xattr.c:857 [inline]
 path_removexattr+0x1ec/0x2ec fs/xattr.c:871
 __do_sys_removexattr fs/xattr.c:885 [inline]
 __se_sys_removexattr fs/xattr.c:882 [inline]
 __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:882
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 5400014c b4000b8c aa2a03e9 8b0b0129 (3940010a) 
---[ end trace 26a637bca944f6d4 ]---
----------------
Code disassembly (best guess):
   0:	5400014c 	b.gt	0x28
   4:	b4000b8c 	cbz	x12, 0x174
   8:	aa2a03e9 	mvn	x9, x10
   c:	8b0b0129 	add	x9, x9, x11
* 10:	3940010a 	ldrb	w10, [x8] <-- trapping instruction