loop1: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x84/0x24c fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff0000d4c892e0 by task syz.1.117/4940 CPU: 1 PID: 4940 Comm: syz.1.117 Not tainted 5.15.180-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 fs/hfsplus/bnode.c:-1 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 4940: 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:609 [inline] kzalloc include/linux/slab.h:735 [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 fs/hfsplus/attributes.c:-1 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 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] loop_queue_work drivers/block/loop.c:1067 [inline] loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201 __blk_mq_issue_directly block/blk-mq.c:2014 [inline] __blk_mq_try_issue_directly+0x404/0x6dc block/blk-mq.c:2070 blk_mq_try_issue_directly+0x108/0x334 block/blk-mq.c:2101 blk_mq_submit_bio+0xf40/0x1ae0 block/blk-mq.c:-1 __submit_bio+0x628/0x664 block/blk-core.c:917 __submit_bio_noacct_mq block/blk-core.c:997 [inline] submit_bio_noacct+0x680/0x7dc block/blk-core.c:1027 submit_bio+0x394/0x68c block/blk-core.c:1089 write_dev_supers fs/btrfs/disk-io.c:3906 [inline] write_all_supers+0x24e8/0x3a6c fs/btrfs/disk-io.c:4208 btrfs_commit_transaction+0x1694/0x30f0 fs/btrfs/transaction.c:2464 btrfs_commit_super+0xb4/0xd0 fs/btrfs/disk-io.c:4338 close_ctree+0x3b0/0x898 fs/btrfs/disk-io.c:4470 btrfs_put_super+0x40/0x50 fs/btrfs/super.c:340 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_anon_super+0x4c/0x74 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2391 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 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] loop_queue_work drivers/block/loop.c:1067 [inline] loop_queue_rq+0x9a8/0xb20 drivers/block/loop.c:2201 __blk_mq_issue_directly block/blk-mq.c:2014 [inline] __blk_mq_try_issue_directly+0x404/0x6dc block/blk-mq.c:2070 blk_mq_request_issue_directly block/blk-mq.c:2118 [inline] blk_mq_try_issue_list_directly+0x1e0/0x55c block/blk-mq.c:2136 blk_mq_sched_insert_requests+0x354/0x83c block/blk-mq-sched.c:512 blk_mq_flush_plug_list+0x570/0x850 block/blk-mq.c:1971 blk_flush_plug_list+0x37c/0x3d0 block/blk-core.c:1734 blk_finish_plug+0x68/0x90 block/blk-core.c:1751 btrfs_write_and_wait_transaction+0xfc/0x210 fs/btrfs/transaction.c:1214 btrfs_commit_transaction+0x166c/0x30f0 fs/btrfs/transaction.c:2445 btrfs_commit_super+0xb4/0xd0 fs/btrfs/disk-io.c:4338 close_ctree+0x3b0/0x898 fs/btrfs/disk-io.c:4470 btrfs_put_super+0x40/0x50 fs/btrfs/super.c:340 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_anon_super+0x4c/0x74 fs/super.c:1089 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2391 deactivate_locked_super+0xb8/0x13c fs/super.c:335 deactivate_super+0x108/0x128 fs/super.c:366 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150 task_work_run+0x130/0x1e4 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 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 ffff0000d4c89200 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 224 bytes inside of 256-byte region [ffff0000d4c89200, ffff0000d4c89300) The buggy address belongs to the page: page:00000000a1ed2f0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114c88 head:00000000a1ed2f0d order:1 compound_mapcount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc0003369300 0000000700000007 ffff0000c0002480 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d4c89180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d4c89200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d4c89280: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d4c89300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d4c89380: 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 ffff7eb000009c5f 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=00000001ae1aa000 [ffff7eb000009c5f] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4940 Comm: syz.1.117 Tainted: G B 5.15.180-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 : ffff800020736f10 x29: ffff800020736f10 x28: 00000000000000ff x27: dfff800000000000 x26: ffff800020737040 x25: 1ffff000028aa13f x24: 0000000000000001 x23: ffff8000171d9000 x22: ffff800008fc7360 x21: ffff800020737020 x20: fffff5800004e2ff x19: 0000000000000001 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800011b60d38 x15: 00000000000000ff x14: ffff0000dccb1b40 x13: 0000000000ff0100 x12: 0000000000000001 x11: 1ffffeb000009c5f x10: 1ffffeb000009c5f x9 : ffffffffffffffff x8 : ffff7eb000009c5f x7 : 0000000000000000 x6 : 00000000000000ff x5 : ffff800020737042 x4 : ffff0000f2f9d00c x3 : ffff800008fc7360 x2 : 0000000000000000 x1 : 0000000000000001 x0 : fffff5800004e2ff 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 fs/hfsplus/bnode.c:-1 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 bc7f97ab5dcdc374 ]--- ---------------- 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