================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3a5d/0x5340 kernel/locking/lockdep.c:3665 Read of size 8 at addr ffff8881c82c68a0 by task syz-executor.2/2950 CPU: 1 PID: 2950 Comm: syz-executor.2 Not tainted 5.2.0-rc6+ #1 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+0x67/0x231 mm/kasan/report.c:188 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:317 kasan_report+0xe/0x20 mm/kasan/common.c:614 __lock_acquire+0x3a5d/0x5340 kernel/locking/lockdep.c:3665 lock_acquire+0x100/0x2b0 kernel/locking/lockdep.c:4303 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x2d/0x40 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] usbhid_power+0x4a/0x240 drivers/hid/usbhid/hid-core.c:1232 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:413 do_dentry_open+0x497/0x1040 fs/open.c:778 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3ff0 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1070 do_syscall_64+0xb7/0x560 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413711 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:00007fd4b6cf27a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413711 RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00007fd4b6cf2850 RBP: 000000000075bfc8 R08: 000000000000000f R09: 0000000000000000 R10: 00007fd4b6cf39d0 R11: 0000000000000293 R12: 00007fd4b6cf36d4 R13: 00000000004c8a7a R14: 00000000004df748 R15: 00000000ffffffff Allocated by task 2939: save_stack+0x1b/0x80 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:462 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc_node mm/slub.c:2748 [inline] __kmalloc_node_track_caller+0xee/0x370 mm/slub.c:4363 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:138 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:1054 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1179 [inline] netlink_sendmsg+0x8d6/0xcc0 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:665 ___sys_sendmsg+0x803/0x920 net/socket.c:2286 __sys_sendmsg+0xec/0x1b0 net/socket.c:2324 do_syscall_64+0xb7/0x560 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 2939: save_stack+0x1b/0x80 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:451 slab_free_hook mm/slub.c:1421 [inline] slab_free_freelist_hook mm/slub.c:1448 [inline] slab_free mm/slub.c:2994 [inline] kfree+0xd7/0x280 mm/slub.c:3949 skb_free_head+0x8b/0xa0 net/core/skbuff.c:588 skb_release_data+0x41f/0x7c0 net/core/skbuff.c:608 skb_release_all+0x46/0x60 net/core/skbuff.c:662 __kfree_skb net/core/skbuff.c:676 [inline] consume_skb net/core/skbuff.c:736 [inline] consume_skb+0xc0/0x2f0 net/core/skbuff.c:730 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4d7/0x690 net/netlink/af_netlink.c:1333 netlink_sendmsg+0x80b/0xcc0 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:665 ___sys_sendmsg+0x803/0x920 net/socket.c:2286 __sys_sendmsg+0xec/0x1b0 net/socket.c:2324 do_syscall_64+0xb7/0x560 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881c82c6880 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 32 bytes inside of 1024-byte region [ffff8881c82c6880, ffff8881c82c6c80) The buggy address belongs to the page: page:ffffea000720b100 refcount:1 mapcount:0 mapping:ffff8881dac02a00 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000200 ffff8881dac02a00 raw: 0000000000000000 00000000000e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c82c6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c82c6800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881c82c6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881c82c6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c82c6980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================