hfsplus: request for non-existent node 256 in B*Tree hfsplus: request for non-existent node 256 in B*Tree ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x22a/0x240 fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff888021b40cc0 by task syz-executor428/5181 CPU: 0 PID: 5181 Comm: syz-executor428 Not tainted 6.9.0-rc7-syzkaller-00136-gf4345f05c0df #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 hfsplus_bnode_read+0x22a/0x240 fs/hfsplus/bnode.c:32 hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:45 [inline] hfsplus_bnode_dump+0x2a2/0x3e0 fs/hfsplus/bnode.c:321 hfsplus_brec_remove+0x3e2/0x4f0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x2a2/0x3b0 fs/hfsplus/attributes.c:299 hfsplus_delete_all_attrs+0x271/0x330 fs/hfsplus/attributes.c:378 hfsplus_delete_cat+0x844/0xdd0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x213/0x7f0 fs/hfsplus/dir.c:385 vfs_unlink+0x2fb/0x910 fs/namei.c:4335 do_unlinkat+0x5c0/0x750 fs/namei.c:4399 __do_sys_unlink fs/namei.c:4447 [inline] __se_sys_unlink fs/namei.c:4445 [inline] __x64_sys_unlink+0xc7/0x110 fs/namei.c:4445 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3fc5f4b5f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd6d81d338 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007ffd6d81d518 RCX: 00007f3fc5f4b5f9 RDX: 00007f3fc5f4a691 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f3fc5fbe610 R08: 000000000000066d R09: 0000000000000000 R10: 00007ffd6d81d200 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd6d81d508 R14: 0000000000000001 R15: 0000000000000001 Allocated by task 5181: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3972 [inline] __kmalloc+0x1f9/0x440 mm/slub.c:3985 kmalloc include/linux/slab.h:632 [inline] kzalloc include/linux/slab.h:749 [inline] __hfs_bnode_create+0x108/0x870 fs/hfsplus/bnode.c:409 hfsplus_bnode_find+0x2c8/0xcb0 fs/hfsplus/bnode.c:486 hfsplus_brec_find+0x2b9/0x520 fs/hfsplus/bfind.c:183 hfsplus_find_attr fs/hfsplus/attributes.c:160 [inline] hfsplus_delete_all_attrs+0x24a/0x330 fs/hfsplus/attributes.c:371 hfsplus_delete_cat+0x844/0xdd0 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x213/0x7f0 fs/hfsplus/dir.c:385 vfs_unlink+0x2fb/0x910 fs/namei.c:4335 do_unlinkat+0x5c0/0x750 fs/namei.c:4399 __do_sys_unlink fs/namei.c:4447 [inline] __se_sys_unlink fs/namei.c:4445 [inline] __x64_sys_unlink+0xc7/0x110 fs/namei.c:4445 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888021b40c00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 40 bytes to the right of allocated 152-byte region [ffff888021b40c00, ffff888021b40c98) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21b40 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888015042a00 ffffea00008d06c0 0000000000000002 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid -438742273 (swapper/0), ts 1, free_ts 9727640415 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2180 [inline] allocate_slab mm/slub.c:2343 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2396 ___slab_alloc+0x66d/0x1790 mm/slub.c:3530 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3615 __slab_alloc_node mm/slub.c:3668 [inline] slab_alloc_node mm/slub.c:3841 [inline] __do_kmalloc_node mm/slub.c:3971 [inline] __kmalloc+0x3bf/0x440 mm/slub.c:3985 kmalloc include/linux/slab.h:632 [inline] usb_alloc_urb+0x69/0xa0 drivers/usb/core/urb.c:75 usb_mdc800_init+0x468/0x800 drivers/usb/image/mdc800.c:1017 do_one_initcall+0x128/0x700 init/main.c:1245 do_initcall_level init/main.c:1307 [inline] do_initcalls init/main.c:1323 [inline] do_basic_setup init/main.c:1342 [inline] kernel_init_freeable+0x69d/0xca0 init/main.c:1555 kernel_init+0x1c/0x2b0 init/main.c:1444 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 page last free pid 55 tgid 55 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:408 apply_to_pte_range mm/memory.c:2744 [inline] apply_to_pmd_range mm/memory.c:2788 [inline] apply_to_pud_range mm/memory.c:2824 [inline] apply_to_p4d_range mm/memory.c:2860 [inline] __apply_to_page_range+0x57b/0xdc0 mm/memory.c:2894 kasan_release_vmalloc+0xac/0xc0 mm/kasan/shadow.c:525 purge_vmap_node+0x3fc/0x920 mm/vmalloc.c:2183 __purge_vmap_area_lazy+0x9ca/0xc10 mm/vmalloc.c:2265 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2299 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888021b40b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888021b40c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888021b40c80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888021b40d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888021b40d80: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc 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