================================================================== BUG: KASAN: use-after-free in driver_find drivers/base/driver.c:293 [inline] BUG: KASAN: use-after-free in driver_register+0x2c0/0x410 drivers/base/driver.c:233 Read of size 8 at addr ffff00000a7532c8 by task syz-executor.0/649 CPU: 0 PID: 649 Comm: syz-executor.0 Not tainted 5.19.0-rc3-syzkaller-00038-gca1fdab7fd27 #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x1e0/0x270 arch/arm64/kernel/stacktrace.c:198 show_stack+0x18/0x70 arch/arm64/kernel/stacktrace.c:205 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x9c/0xd8 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:313 [inline] print_report+0x2f0/0x6e0 mm/kasan/report.c:429 kasan_report+0xb4/0xf0 mm/kasan/report.c:491 __asan_report_load8_noabort+0x34/0x60 mm/kasan/report_generic.c:307 driver_find drivers/base/driver.c:293 [inline] driver_register+0x2c0/0x410 drivers/base/driver.c:233 usb_gadget_register_driver_owner+0xc4/0x240 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:515 [inline] raw_ioctl+0x13dc/0x26ac drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x120/0x190 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc+0xfc/0x13c arch/arm64/kernel/syscall.c:206 el0_svc+0x70/0x210 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x1ac/0x1b0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Allocated by task 659: kasan_save_stack+0x2c/0x5c mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] __kasan_kmalloc+0x90/0xb4 mm/kasan/common.c:524 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x224/0x460 mm/slub.c:3284 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] bus_add_driver+0xac/0x540 drivers/base/bus.c:602 driver_register+0x184/0x410 drivers/base/driver.c:240 usb_gadget_register_driver_owner+0xc4/0x240 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:515 [inline] raw_ioctl+0x13dc/0x26ac drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x120/0x190 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc+0xfc/0x13c arch/arm64/kernel/syscall.c:206 el0_svc+0x70/0x210 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x1ac/0x1b0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Freed by task 649: kasan_save_stack+0x2c/0x5c mm/kasan/common.c:38 kasan_set_track+0x2c/0x40 mm/kasan/common.c:45 kasan_set_free_info+0x28/0x50 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x128/0x1d4 mm/kasan/common.c:328 __kasan_slab_free+0x18/0x2c mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x94/0x260 mm/slub.c:1780 slab_free mm/slub.c:3536 [inline] kfree+0x134/0x440 mm/slub.c:4584 driver_release+0x20/0x84 drivers/base/bus.c:91 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x170/0x45c lib/kobject.c:721 driver_find drivers/base/driver.c:291 [inline] driver_register+0x15c/0x410 drivers/base/driver.c:233 usb_gadget_register_driver_owner+0xc4/0x240 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:515 [inline] raw_ioctl+0x13dc/0x26ac drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x120/0x190 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142 do_el0_svc+0xfc/0x13c arch/arm64/kernel/syscall.c:206 el0_svc+0x70/0x210 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x1ac/0x1b0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 The buggy address belongs to the object at ffff00000a753200 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 200 bytes inside of 256-byte region [ffff00000a753200, ffff00000a753300) The buggy address belongs to the physical page: page:000000002cd52f72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4a752 head:000000002cd52f72 order:1 compound_mapcount:0 compound_pincount:0 flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff) raw: 01ffc00000010200 0000000000000000 dead000000000122 ffff000009802480 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00000a753180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00000a753200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff00000a753280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff00000a753300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00000a753380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Error: Driver 'raw-gadget' is already registered, aborting... UDC core: USB Raw Gadget: driver registration failed: -16 misc raw-gadget: fail, usb_gadget_register_driver returned -16