================================================================== BUG: KASAN: slab-use-after-free in usb_endpoint_dir_in include/uapi/linux/usb/ch9.h:498 [inline] BUG: KASAN: slab-use-after-free in raw_process_ep_io+0x848/0xb90 drivers/usb/gadget/legacy/raw_gadget.c:1098 Read of size 1 at addr ffff88810df83fc2 by task syz.3.544/6722 CPU: 0 UID: 0 PID: 6722 Comm: syz.3.544 Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 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 usb_endpoint_dir_in include/uapi/linux/usb/ch9.h:498 [inline] raw_process_ep_io+0x848/0xb90 drivers/usb/gadget/legacy/raw_gadget.c:1098 raw_ioctl_ep_write drivers/usb/gadget/legacy/raw_gadget.c:1152 [inline] raw_ioctl+0xa53/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1324 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda05d5dafb Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007fda049aef70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda05d5dafb RDX: 00007fda049aeff0 RSI: 0000000040085507 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fda06040320 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000a R14: 00007fda05f16058 R15: 00007ffd4c591b18 Allocated by task 6722: 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+0x8f/0xa0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_node_track_caller_noprof+0x1ff/0x3e0 mm/slub.c:4181 memdup_user+0x2a/0xd0 mm/util.c:226 raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline] raw_ioctl+0xbca/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1318 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 6718: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x14/0x30 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x10b/0x380 mm/slub.c:4598 dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 kref_put include/linux/kref.h:65 [inline] raw_release+0x16e/0x2c0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x408/0xbb0 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1566 [inline] __se_sys_close fs/open.c:1551 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1551 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88810df83fc0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 2 bytes inside of freed 16-byte region [ffff88810df83fc0, ffff88810df83fd0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88810df83e00 pfn:0x10df83 flags: 0x200000000000000(node=0|zone=2) page_type: 0xfdffffff(slab) raw: 0200000000000000 ffff888100041640 ffffea000404bd00 dead000000000002 raw: ffff88810df83e00 0000000080800062 00000001fdffffff 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (init), ts 9984441959, free_ts 8923390476 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1311/0x25f0 mm/page_alloc.c:3446 __alloc_pages_noprof+0x21e/0x2290 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2325 allocate_slab mm/slub.c:2488 [inline] new_slab+0x84/0x260 mm/slub.c:2541 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __do_kmalloc_node mm/slub.c:4161 [inline] __kmalloc_node_track_caller_noprof+0x14e/0x3e0 mm/slub.c:4181 kstrdup+0x3c/0x70 mm/util.c:64 get_permissions_callback+0x56/0xb0 security/selinux/ss/services.c:3386 hashtab_map+0x10b/0x1b0 security/selinux/ss/hashtab.c:97 security_get_permissions+0x169/0x300 security/selinux/ss/services.c:3424 sel_make_perm_files security/selinux/selinuxfs.c:1775 [inline] sel_make_class_dir_entries security/selinux/selinuxfs.c:1835 [inline] sel_make_classes security/selinux/selinuxfs.c:1864 [inline] sel_make_policy_nodes security/selinux/selinuxfs.c:537 [inline] sel_write_load+0x117e/0x1c60 security/selinux/selinuxfs.c:609 vfs_write+0x29a/0x1140 fs/read_write.c:588 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 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:1101 [inline] free_unref_page+0x698/0xce0 mm/page_alloc.c:2619 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:408 apply_to_pte_range mm/memory.c:2797 [inline] apply_to_pmd_range mm/memory.c:2841 [inline] apply_to_pud_range mm/memory.c:2877 [inline] apply_to_p4d_range mm/memory.c:2913 [inline] __apply_to_page_range+0x795/0xdd0 mm/memory.c:2947 kasan_release_vmalloc+0xac/0xc0 mm/kasan/shadow.c:525 purge_vmap_node+0x3ec/0x920 mm/vmalloc.c:2209 __purge_vmap_area_lazy+0x9ca/0xc10 mm/vmalloc.c:2293 _vm_unmap_aliases+0x286/0x880 mm/vmalloc.c:2888 change_page_attr_set_clr+0x24c/0x490 arch/x86/mm/pat/set_memory.c:1881 change_page_attr_set arch/x86/mm/pat/set_memory.c:1922 [inline] set_memory_nx+0xb6/0x110 arch/x86/mm/pat/set_memory.c:2110 free_init_pages+0x79/0xd0 arch/x86/mm/init.c:924 free_kernel_image_pages+0x24/0x50 arch/x86/mm/init.c:943 kernel_init+0x30/0x2b0 init/main.c:1476 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: ffff88810df83e80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff88810df83f00: fa fb fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc >ffff88810df83f80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ^ ffff88810df84000: 00 00 00 fc fc 00 00 00 fc fc 00 00 00 fc fc 00 ffff88810df84080: 00 00 fc fc 00 00 00 fc fc 00 00 00 fc fc 00 00 ==================================================================