================================================================== BUG: KASAN: use-after-free in usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234 Read of size 8 at addr ffff8881cdcb0008 by task syz-executor.5/28345 CPU: 0 PID: 28345 Comm: syz-executor.5 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:618 usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234 hid_hw_power include/linux/hid.h:1038 [inline] hidraw_open+0x20d/0x740 drivers/hid/hidraw.c:282 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4137d1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007feafd0337a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004137d1 RDX: 0000000000000000 RSI: 0000000000008e42 RDI: 00007feafd033850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 00007feafd0349d0 R11: 0000000000000293 R12: 00007feafd0346d4 R13: 00000000004c8cbf R14: 00000000004dfc90 R15: 00000000ffffffff Allocated by task 15375: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:493 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:466 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc_node mm/slub.c:2770 [inline] __kmalloc_node_track_caller+0xfc/0x380 mm/slub.c:4365 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:141 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:209 alloc_skb include/linux/skbuff.h:1055 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1174 [inline] netlink_sendmsg+0x8cd/0xcc0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0xec/0x1b0 net/socket.c:2356 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 15375: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:455 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 skb_free_head+0x8b/0xa0 net/core/skbuff.c:591 skb_release_data+0x41f/0x7c0 net/core/skbuff.c:611 skb_release_all+0x46/0x60 net/core/skbuff.c:665 __kfree_skb net/core/skbuff.c:679 [inline] consume_skb net/core/skbuff.c:838 [inline] consume_skb+0xd9/0x320 net/core/skbuff.c:832 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x4d7/0x690 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x802/0xcc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0xec/0x1b0 net/socket.c:2356 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881cdcb0000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 8 bytes inside of 1024-byte region [ffff8881cdcb0000, ffff8881cdcb0400) The buggy address belongs to the page: page:ffffea0007372c00 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da002280 raw: 0000000000000000 00000000000e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cdcaff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cdcaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881cdcb0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881cdcb0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881cdcb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================