================================================================== BUG: KASAN: slab-use-after-free in rtsx_usb_ms_issue_cmd drivers/memstick/host/rtsx_usb_ms.c:486 [inline] BUG: KASAN: slab-use-after-free in rtsx_usb_ms_handle_req+0x17ff/0x1a00 drivers/memstick/host/rtsx_usb_ms.c:531 Read of size 1 at addr ffff8881056e5071 by task kworker/1:2/795 CPU: 1 UID: 0 PID: 795 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: events rtsx_usb_ms_handle_req Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 rtsx_usb_ms_issue_cmd drivers/memstick/host/rtsx_usb_ms.c:486 [inline] rtsx_usb_ms_handle_req+0x17ff/0x1a00 drivers/memstick/host/rtsx_usb_ms.c:531 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 698: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] memstick_alloc_card drivers/memstick/core/memstick.c:383 [inline] memstick_check+0x2c1/0x10d0 drivers/memstick/core/memstick.c:452 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 698: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:264 [inline] __kasan_slab_free+0x43/0x70 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2748 [inline] slab_free mm/slub.c:6509 [inline] kfree+0x20c/0x650 mm/slub.c:6802 memstick_alloc_card drivers/memstick/core/memstick.c:420 [inline] memstick_check+0x72b/0x10d0 drivers/memstick/core/memstick.c:452 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff8881056e5000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 113 bytes inside of freed 2048-byte region [ffff8881056e5000, ffff8881056e5800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881056e1000 pfn:0x1056e0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x200000000000240(workingset|head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000240 ffff888100042000 ffffea0004707010 ffffea0004cd7410 raw: ffff8881056e1000 0000000000080007 00000000f5000000 0000000000000000 head: 0200000000000240 ffff888100042000 ffffea0004707010 ffffea0004cd7410 head: ffff8881056e1000 0000000000080007 00000000f5000000 0000000000000000 head: 0200000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 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 2862793726 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0xf4b/0x3440 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2d7/0x2f70 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3462 [inline] new_slab+0xa9/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7418 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __kmalloc_cache_noprof+0x4a1/0x680 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] acpi_ds_create_walk_state+0x95/0x300 drivers/acpi/acpica/dswstate.c:518 acpi_ps_execute_method+0x2c1/0xe90 drivers/acpi/acpica/psxface.c:134 acpi_ns_evaluate+0x640/0x1670 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x420/0xe00 drivers/acpi/acpica/nsxfeval.c:354 acpi_evaluate_integer+0xdf/0x220 drivers/acpi/utils.c:260 acpi_bus_get_status_handle drivers/acpi/bus.c:82 [inline] acpi_bus_get_status+0x1a1/0x430 drivers/acpi/bus.c:111 acpi_scan_init_status drivers/acpi/scan.c:1859 [inline] acpi_add_single_object+0x127/0x1ab0 drivers/acpi/scan.c:1892 acpi_bus_check_add+0x2d2/0x920 drivers/acpi/scan.c:2175 acpi_ns_walk_namespace+0x4cc/0x760 drivers/acpi/acpica/nswalk.c:236 page_owner free stack trace missing Memory state around the buggy address: ffff8881056e4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881056e4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881056e5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881056e5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881056e5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================