hfsplus: request for non-existent node 128 in B*Tree
hfsplus: request for non-existent node 128 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 ffff0000c20568c0 by task syz.3.152/4547

CPU: 0 PID: 4547 Comm: syz.3.152 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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_all_attrs+0x214/0x348 fs/hfsplus/attributes.c:378
 hfsplus_delete_cat+0x9a4/0xd6c fs/hfsplus/catalog.c:425
 hfsplus_unlink+0x2c0/0x6a0 fs/hfsplus/dir.c:385
 vfs_unlink+0x2f0/0x508 fs/namei.c:4280
 do_unlinkat+0x4cc/0x830 fs/namei.c:4348
 __do_sys_unlinkat fs/namei.c:4391 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4384
 __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 4547:
 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 fs/hfsplus/attributes.c:160 [inline]
 hfsplus_delete_all_attrs+0x1ec/0x348 fs/hfsplus/attributes.c:371
 hfsplus_delete_cat+0x9a4/0xd6c fs/hfsplus/catalog.c:425
 hfsplus_unlink+0x2c0/0x6a0 fs/hfsplus/dir.c:385
 vfs_unlink+0x2f0/0x508 fs/namei.c:4280
 do_unlinkat+0x4cc/0x830 fs/namei.c:4348
 __do_sys_unlinkat fs/namei.c:4391 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4384
 __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
 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596
 drop_sysctl_table+0x274/0x3a0 fs/proc/proc_sysctl.c:1678
 unregister_sysctl_table+0x94/0x130 fs/proc/proc_sysctl.c:1716
 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:175
 lowpan_frags_ns_sysctl_unregister net/ieee802154/6lowpan/reassembly.c:402 [inline]
 lowpan_frags_exit_net+0x60/0xb8 net/ieee802154/6lowpan/reassembly.c:475
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x568/0x9bc net/core/net_namespace.c:599
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Second to 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
 insert_work+0x64/0x394 kernel/workqueue.c:1366
 __queue_work+0xb84/0x114c kernel/workqueue.c:1532
 queue_work_on+0xc4/0x17c kernel/workqueue.c:1559
 queue_work include/linux/workqueue.h:512 [inline]
 netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:659 [inline]
 netdevice_event+0x724/0x84c drivers/infiniband/core/roce_gid_mgmt.c:802
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers+0x138/0x1b8 net/core/dev.c:2044
 register_netdevice+0xf28/0x12d4 net/core/dev.c:10396
 veth_newlink+0x700/0xbd4 drivers/net/veth.c:1714
 __rtnl_newlink net/core/rtnetlink.c:3521 [inline]
 rtnl_newlink+0x10d0/0x1acc 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 ffff0000c2056800
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 192 bytes inside of
 256-byte region [ffff0000c2056800, ffff0000c2056900)
The buggy address belongs to the page:
page:000000009642d251 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102056
head:000000009642d251 order:1 compound_mapcount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc000302d080 0000000900000007 ffff0000c0002480
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c2056780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c2056800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000c2056880: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff0000c2056900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c2056980: 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 ffff7bb800009017
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=00000001ae195000
[ffff7bb800009017] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4547 Comm: syz.3.152 Tainted: G    B             5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 : ffff800020397370
x29: ffff800020397370 x28: 00000000000000ff x27: dfff800000000000
x26: ffff8000203974a0 x25: 1ffff000028a777b x24: 0000000000000001
x23: ffff8000171c4000 x22: ffff800008fc3ab8 x21: ffff800020397480
x20: ffffddc0000480bf x19: 0000000000000001 x18: 0000000000000000
x17: 0000000000000002 x16: ffff800011b4e16c x15: 00000000000000ff
x14: ffff0000c2378000 x13: 0000000000ff0100 x12: 0000000000000001
x11: 1ffffbb800009017 x10: 1ffffbb800009017 x9 : ffffffffffffffff
x8 : ffff7bb800009017 x7 : 0000000000000000 x6 : 00000000000000ff
x5 : ffff8000203974a2 x4 : ffff0000deb2100c x3 : ffff800008fc3ab8
x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffddc0000480bf
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_all_attrs+0x214/0x348 fs/hfsplus/attributes.c:378
 hfsplus_delete_cat+0x9a4/0xd6c fs/hfsplus/catalog.c:425
 hfsplus_unlink+0x2c0/0x6a0 fs/hfsplus/dir.c:385
 vfs_unlink+0x2f0/0x508 fs/namei.c:4280
 do_unlinkat+0x4cc/0x830 fs/namei.c:4348
 __do_sys_unlinkat fs/namei.c:4391 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4384
 __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 d0bd62e436c3ebd3 ]---
----------------
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