loop0: detected capacity change from 0 to 1024 hfsplus: request for non-existent node 65030 in B*Tree hfsplus: request for non-existent node 65030 in B*Tree ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x84/0x21c fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff0000cf246ec0 by task syz.0.15/4929 CPU: 1 PID: 4929 Comm: syz.0.15 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 hfsplus_bnode_read+0x84/0x21c fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x26c/0x37c fs/hfsplus/bnode.c:-1 hfsplus_brec_remove+0x3cc/0x4a0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x198/0x350 fs/hfsplus/attributes.c:299 hfsplus_delete_all_attrs+0x204/0x33c fs/hfsplus/attributes.c:378 hfsplus_delete_cat+0x844/0xbb0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x2a0/0x664 fs/hfsplus/dir.c:385 hfsplus_rename+0xd0/0x1b0 fs/hfsplus/dir.c:547 vfs_rename+0x954/0xdcc fs/namei.c:4832 do_renameat2+0x74c/0xcdc fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4929: 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 mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb0/0xf0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x298/0x44c mm/slub.c:4407 kmalloc include/linux/slab.h:609 [inline] kzalloc include/linux/slab.h:735 [inline] __hfs_bnode_create+0xe4/0x84c fs/hfsplus/bnode.c:422 hfsplus_bnode_find+0x1f8/0xbcc fs/hfsplus/bnode.c:503 hfsplus_brec_find+0x128/0x448 fs/hfsplus/bfind.c:172 hfsplus_find_attr fs/hfsplus/attributes.c:160 [inline] hfsplus_delete_all_attrs+0x1e0/0x33c fs/hfsplus/attributes.c:371 hfsplus_delete_cat+0x844/0xbb0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x2a0/0x664 fs/hfsplus/dir.c:385 hfsplus_rename+0xd0/0x1b0 fs/hfsplus/dir.c:547 vfs_rename+0x954/0xdcc fs/namei.c:4832 do_renameat2+0x74c/0xcdc fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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+0xcc/0x114 mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x66c kernel/rcu/tree.c:3600 drop_sysctl_table+0x274/0x39c fs/proc/proc_sysctl.c:1685 unregister_sysctl_table+0x94/0x134 fs/proc/proc_sysctl.c:1723 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:175 ip6_frags_ns_sysctl_unregister net/ipv6/reassembly.c:486 [inline] ipv6_frags_exit_net+0x60/0x118 net/ipv6/reassembly.c:549 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x5c4/0xa98 net/core/net_namespace.c:635 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855 Second to last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xcc/0x114 mm/kasan/generic.c:348 insert_work+0x64/0x388 kernel/workqueue.c:1366 __queue_work+0xb30/0x1054 kernel/workqueue.c:1532 queue_work_on+0xc4/0x17c kernel/workqueue.c:1559 queue_work include/linux/workqueue.h:512 [inline] call_usermodehelper_exec+0x22c/0x478 kernel/umh.c:435 kobject_uevent_env+0x670/0x888 lib/kobject_uevent.c:633 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:657 driver_register+0x29c/0x374 drivers/base/driver.c:248 usb_register_driver+0x1bc/0x390 drivers/usb/core/driver.c:1061 usb_serial_register_drivers+0x1f8/0xbb8 drivers/usb/serial/usb-serial.c:1510 usb_serial_module_init+0x2c/0x38 drivers/usb/serial/aircable.c:157 do_one_initcall+0x228/0x8b0 init/main.c:1302 do_initcall_level+0x154/0x214 init/main.c:1375 do_initcalls+0x58/0xac init/main.c:1391 do_basic_setup+0x8c/0xa0 init/main.c:1410 kernel_init_freeable+0x404/0x5fc init/main.c:1615 kernel_init+0x24/0x1d0 init/main.c:1506 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855 The buggy address belongs to the object at ffff0000cf246e00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 192 bytes inside of 256-byte region [ffff0000cf246e00, ffff0000cf246f00) The buggy address belongs to the page: page:00000000775e01d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f246 head:00000000775e01d3 order:1 compound_mapcount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 0000000800000001 ffff0000c0002480 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cf246d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000cf246e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000cf246e80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000cf246f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000cf246f80: 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 ffff7b2000009bff 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=00000002113bb000 [ffff7b2000009bff] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4929 Comm: syz.0.15 Tainted: G B 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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+0x74/0x2b0 mm/kasan/generic.c:189 lr : memcpy+0x90/0xe8 mm/kasan/shadow.c:65 sp : ffff80001f667230 x29: ffff80001f667230 x28: 1fffe00019e48dc3 x27: ffff80001f667300 x26: 0000000040000000 x25: 1ffff0000276bbf8 x24: dfff800000000000 x23: ffff8000167a8000 x22: ffff800008eaca8c x21: ffff80001f667320 x20: ffffd9000004dfff x19: 0000000000000001 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800008eae884 x15: 00000000000000ff x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000000001 x11: 1ffffb2000009bff x10: 1ffffb2000009bff x9 : ffffffffffffffff x8 : ffff7b2000009bff x7 : 0000000000000000 x6 : 00000000000000ff x5 : ffff80001f667342 x4 : ffff0000eb62100c x3 : ffff800008eaca8c x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffd9000004dfff 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+0x74/0x2b0 mm/kasan/generic.c:189 memcpy+0x90/0xe8 mm/kasan/shadow.c:65 hfsplus_bnode_read+0x10c/0x21c fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x26c/0x37c fs/hfsplus/bnode.c:-1 hfsplus_brec_remove+0x3cc/0x4a0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x198/0x350 fs/hfsplus/attributes.c:299 hfsplus_delete_all_attrs+0x204/0x33c fs/hfsplus/attributes.c:378 hfsplus_delete_cat+0x844/0xbb0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x2a0/0x664 fs/hfsplus/dir.c:385 hfsplus_rename+0xd0/0x1b0 fs/hfsplus/dir.c:547 vfs_rename+0x954/0xdcc fs/namei.c:4832 do_renameat2+0x74c/0xcdc fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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 31084842e1c70060 ]--- ---------------- 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