================================================================== BUG: KASAN: use-after-free in usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234 Read of size 8 at addr ffff8881ce74c008 by task syz-executor.5/10033 CPU: 0 PID: 10033 Comm: syz-executor.5 Not tainted 5.3.0+ #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:3408 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3525 do_filp_open+0x1a1/0x280 fs/namei.c:3555 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4138f1 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:00007fb5b2d6e7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004138f1 RDX: 0000000000000000 RSI: 0000800004080001 RDI: 00007fb5b2d6e850 RBP: 000000000075bf20 R08: 00007fb5b2d6e7b0 R09: 000000000075bf20 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fb5b2d6f6d4 R13: 00000000004c8df7 R14: 00000000004dff20 R15: 00000000ffffffff Allocated by task 10044: 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] slab_alloc mm/slub.c:2778 [inline] kmem_cache_alloc+0xd6/0x2d0 mm/slub.c:2783 mempool_alloc+0x148/0x350 mm/mempool.c:393 __sg_alloc_table+0x244/0x380 lib/scatterlist.c:302 sg_alloc_table_chained+0x9b/0x1e0 lib/sg_pool.c:132 scsi_init_sgtable drivers/scsi/scsi_lib.c:993 [inline] scsi_init_io+0x11e/0x380 drivers/scsi/scsi_lib.c:1028 sd_setup_read_write_cmnd drivers/scsi/sd.c:1175 [inline] sd_init_command+0x221/0x2caf drivers/scsi/sd.c:1294 scsi_setup_fs_cmnd drivers/scsi/scsi_lib.c:1210 [inline] scsi_setup_cmnd drivers/scsi/scsi_lib.c:1228 [inline] scsi_mq_prep_fn drivers/scsi/scsi_lib.c:1604 [inline] scsi_queue_rq+0x1391/0x2c10 drivers/scsi/scsi_lib.c:1672 blk_mq_dispatch_rq_list+0x1094/0x1880 block/blk-mq.c:1264 blk_mq_do_dispatch_sched+0x188/0x3f0 block/blk-mq-sched.c:115 blk_mq_sched_dispatch_requests+0x3cd/0x650 block/blk-mq-sched.c:211 __blk_mq_run_hw_queue+0x12c/0x290 block/blk-mq.c:1394 __blk_mq_delay_run_hw_queue+0x4ea/0x540 block/blk-mq.c:1462 blk_mq_run_hw_queue+0x172/0x2f0 block/blk-mq.c:1499 blk_mq_sched_insert_requests+0x2d8/0x600 block/blk-mq-sched.c:444 blk_mq_flush_plug_list+0x799/0xc00 block/blk-mq.c:1763 blk_flush_plug_list+0x2ff/0x460 block/blk-core.c:1759 blk_mq_make_request+0xa2e/0x1da0 block/blk-mq.c:2001 generic_make_request block/blk-core.c:1063 [inline] generic_make_request+0x23c/0xb10 block/blk-core.c:1005 submit_bio+0xb1/0x440 block/blk-core.c:1189 ext4_io_submit+0x18a/0x220 fs/ext4/page-io.c:348 io_submit_add_bh fs/ext4/page-io.c:388 [inline] ext4_bio_write_page+0x7c2/0x1077 fs/ext4/page-io.c:503 mpage_submit_page+0x14b/0x250 fs/ext4/inode.c:2265 mpage_process_page_bufs+0x5c2/0x6d0 fs/ext4/inode.c:2379 mpage_prepare_extent_to_map+0x5cb/0xb30 fs/ext4/inode.c:2737 ext4_writepages+0x98d/0x2d60 fs/ext4/inode.c:2865 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x1b6/0x2a0 mm/filemap.c:415 file_write_and_wait_range+0x90/0x120 mm/filemap.c:773 __generic_file_fsync+0x74/0x1f0 fs/libfs.c:996 ext4_sync_file+0x79e/0x1570 fs/ext4/fsync.c:120 vfs_fsync_range+0x138/0x220 fs/sync.c:197 generic_write_sync include/linux/fs.h:2811 [inline] ext4_file_write_iter+0xa15/0x1230 fs/ext4/file.c:281 call_write_iter include/linux/fs.h:1880 [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+0x127/0x250 fs/read_write.c:611 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10045: 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] kmem_cache_free+0xb9/0x380 mm/slub.c:3032 mempool_free+0xe3/0x370 mm/mempool.c:502 __sg_free_table+0x1cb/0x2b0 lib/scatterlist.c:225 sg_free_table_chained lib/sg_pool.c:93 [inline] sg_free_table_chained+0x86/0xa0 lib/sg_pool.c:84 scsi_mq_free_sgtables drivers/scsi/scsi_lib.c:557 [inline] scsi_mq_uninit_cmd+0x227/0x290 drivers/scsi/scsi_lib.c:566 scsi_end_request+0x1fd/0x7b0 drivers/scsi/scsi_lib.c:605 scsi_io_completion+0x199/0x1200 drivers/scsi/scsi_lib.c:963 scsi_softirq_done+0x2c8/0x390 drivers/scsi/scsi_lib.c:1477 blk_done_softirq+0x23d/0x360 block/blk-softirq.c:37 __do_softirq+0x221/0x912 kernel/softirq.c:292 The buggy address belongs to the object at ffff8881ce74c000 which belongs to the cache sgpool-32 of size 1024 The buggy address is located 8 bytes inside of 1024-byte region [ffff8881ce74c000, ffff8881ce74c400) The buggy address belongs to the page: page:ffffea000739d300 refcount:1 mapcount:0 mapping:ffff8881d7b9d900 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881d7b9d900 raw: 0000000000000000 00000000800e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ce74bf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881ce74bf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881ce74c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881ce74c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ce74c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================