================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3828 Read of size 8 at addr ffff8881d713f910 by task syz-executor.2/5425 CPU: 1 PID: 5425 Comm: syz-executor.2 Not tainted 5.5.0-rc3-syzkaller #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+0xef/0x16e lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374 __kasan_report.cold+0x37/0x85 mm/kasan/report.c:506 kasan_report+0xe/0x20 mm/kasan/common.c:639 __lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3828 lock_acquire+0x130/0x340 kernel/locking/lockdep.c:4485 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x32/0x50 kernel/locking/spinlock.c:159 xpad_play_effect+0xfe/0xcc0 drivers/input/joystick/xpad.c:1225 ml_play_effects+0x817/0x1270 drivers/input/ff-memless.c:398 ml_ff_playback+0x293/0x430 drivers/input/ff-memless.c:460 input_ff_event+0x13a/0x2e0 drivers/input/ff-core.c:286 input_handle_event+0x732/0x13a0 drivers/input/input.c:375 input_inject_event+0x305/0x31e drivers/input/input.c:470 evdev_write+0x2c9/0x410 drivers/input/evdev.c:542 __vfs_write+0x76/0x100 fs/read_write.c:494 vfs_write+0x262/0x5c0 fs/read_write.c:558 ksys_write+0x1e8/0x250 fs/read_write.c:611 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45af49 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f798aa79c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000364 RSI: 00000000200000c0 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f798aa7a6d4 R13: 00000000004ccf43 R14: 00000000004e83f0 R15: 00000000ffffffff Allocated by task 1789: save_stack+0x1b/0x80 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:486 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2759 [inline] __kmalloc_node_track_caller+0xfc/0x3b0 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_fclone include/linux/skbuff.h:1099 [inline] sk_stream_alloc_skb net/ipv4/tcp.c:877 [inline] sk_stream_alloc_skb+0x106/0xc70 net/ipv4/tcp.c:854 tso_fragment net/ipv4/tcp_output.c:1887 [inline] tcp_write_xmit+0x809/0x58c0 net/ipv4/tcp_output.c:2435 __tcp_push_pending_frames+0xaa/0x390 net/ipv4/tcp_output.c:2625 tcp_push+0x472/0x6f0 net/ipv4/tcp.c:726 tcp_sendmsg_locked+0x28eb/0x3250 net/ipv4/tcp.c:1404 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1434 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:659 sock_write_iter+0x283/0x3c0 net/socket.c:991 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write+0x420/0x650 fs/read_write.c:483 __vfs_write+0xc9/0x100 fs/read_write.c:496 vfs_write+0x262/0x5c0 fs/read_write.c:558 ksys_write+0x1e8/0x250 fs/read_write.c:611 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 1794: save_stack+0x1b/0x80 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x117/0x160 mm/kasan/common.c:474 slab_free_hook mm/slub.c:1425 [inline] slab_free_freelist_hook mm/slub.c:1458 [inline] slab_free mm/slub.c:3005 [inline] kfree+0xd5/0x300 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] napi_consume_skb net/core/skbuff.c:914 [inline] napi_consume_skb+0x313/0x550 net/core/skbuff.c:895 free_old_xmit_skbs+0xe5/0x270 drivers/net/virtio_net.c:1366 virtnet_poll_tx+0x1fb/0x380 drivers/net/virtio_net.c:1493 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x428/0xef0 net/core/dev.c:6600 __do_softirq+0x21e/0x950 kernel/softirq.c:292 The buggy address belongs to the object at ffff8881d713f800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 272 bytes inside of 1024-byte region [ffff8881d713f800, ffff8881d713fc00) The buggy address belongs to the page: page:ffffea00075c4e00 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0xffff8881d713f000 compound_mapcount: 0 raw: 0200000000010200 ffffea00074e6e08 ffffea00072d4a08 ffff8881da002280 raw: ffff8881d713f000 0000000000100007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d713f800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d713f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d713f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d713f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d713fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================