================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 Read of size 2 at addr ffff888035ec740c by task syz-executor259/5097 CPU: 0 UID: 0 PID: 5097 Comm: syz-executor259 Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 hfsplus_uni2asc+0x57f/0x1200 fs/hfsplus/unicode.c:179 hfsplus_readdir+0x938/0x1320 fs/hfsplus/dir.c:207 iterate_dir+0x571/0x800 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x1d3/0x4a0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7cb037e63 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 82 48 fb ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 RSP: 002b:00007ffe6a3b23c8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555569887730 RCX: 00007fe7cb037e63 RDX: 0000000000008000 RSI: 0000555569887730 RDI: 0000000000000004 RBP: 0000555569887704 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffb8 R13: 0000000000000010 R14: 0000555569887700 R15: 431bde82d7b634db Allocated by task 5097: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] hfsplus_find_init+0x85/0x1c0 fs/hfsplus/bfind.c:21 hfsplus_readdir+0x20b/0x1320 fs/hfsplus/dir.c:144 iterate_dir+0x571/0x800 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x1d3/0x4a0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888035ec7000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes to the right of allocated 1036-byte region [ffff888035ec7000, ffff888035ec740c) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35ec0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801ac42000 ffffea0000030000 dead000000000002 raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 04fff00000000040 ffff88801ac42000 ffffea0000030000 dead000000000002 head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 04fff00000000003 ffffea0000d7b001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 27227560512, free_ts 26957320326 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4271 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:658 v4l2_ctrl_new+0xfc7/0x1910 drivers/media/v4l2-core/v4l2-ctrls-core.c:1971 v4l2_ctrl_new_custom+0x6fe/0xa20 drivers/media/v4l2-core/v4l2-ctrls-core.c:2041 vivid_create_controls+0xe37/0x4140 drivers/media/test-drivers/vivid/vivid-ctrls.c:1692 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1931 [inline] vivid_probe+0x48ba/0x7cf0 drivers/media/test-drivers/vivid/vivid-core.c:2093 platform_probe+0x13a/0x1c0 drivers/base/platform.c:1404 really_probe+0x2b8/0xad0 drivers/base/dd.c:658 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2678 [inline] __put_partials+0xeb/0x130 mm/slub.c:3146 put_cpu_partial+0x17c/0x250 mm/slub.c:3221 __slab_free+0x2ea/0x3d0 mm/slub.c:4450 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] kobject_uevent_env+0x28b/0x8e0 lib/kobject_uevent.c:540 device_add+0x63b/0xbf0 drivers/base/core.c:3656 __video_register_device+0x3bdf/0x4a50 drivers/media/v4l2-core/v4l2-dev.c:1057 video_register_device include/media/v4l2-dev.h:383 [inline] vivid_create_devnodes+0x1f5f/0x2c90 drivers/media/test-drivers/vivid/vivid-core.c:1677 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:2040 [inline] vivid_probe+0x5858/0x7cf0 drivers/media/test-drivers/vivid/vivid-core.c:2093 platform_probe+0x13a/0x1c0 drivers/base/platform.c:1404 really_probe+0x2b8/0xad0 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800 Memory state around the buggy address: ffff888035ec7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888035ec7380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888035ec7400: 00 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888035ec7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888035ec7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================