================================================================== BUG: KASAN: slab-out-of-bounds in strlen+0x79/0x90 lib/string.c:525 Read of size 1 at addr ffff8881d616df38 by task syz-executor.5/7214 CPU: 0 PID: 7214 Comm: syz-executor.5 Not tainted 5.3.0-rc5+ #28 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:612 strlen+0x79/0x90 lib/string.c:525 strlen include/linux/string.h:281 [inline] hidraw_ioctl+0x245/0xae0 drivers/hid/hidraw.c:446 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459879 Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4211492c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879 RDX: 0000000020002cc0 RSI: 0000000080404805 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f42114936d4 R13: 00000000004c223e R14: 00000000004d56e0 R15: 00000000ffffffff Allocated by task 7210: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:487 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 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+0x204/0x2ca5 drivers/scsi/sd.c:1294 scsi_setup_fs_cmnd drivers/scsi/scsi_lib.c:1198 [inline] scsi_setup_cmnd drivers/scsi/scsi_lib.c:1216 [inline] scsi_mq_prep_fn drivers/scsi/scsi_lib.c:1592 [inline] scsi_queue_rq+0x1391/0x2c10 drivers/scsi/scsi_lib.c:1660 blk_mq_dispatch_rq_list+0x1094/0x1880 block/blk-mq.c:1257 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:1387 __blk_mq_delay_run_hw_queue+0x4ea/0x540 block/blk-mq.c:1455 blk_mq_run_hw_queue+0x172/0x2f0 block/blk-mq.c:1492 blk_mq_sched_insert_requests+0x2d8/0x600 block/blk-mq-sched.c:444 blk_mq_flush_plug_list+0x799/0xc00 block/blk-mq.c:1756 blk_flush_plug_list+0x2ff/0x460 block/blk-core.c:1728 blk_mq_make_request+0xa25/0x1d90 block/blk-mq.c:1994 generic_make_request block/blk-core.c:1052 [inline] generic_make_request+0x23c/0xb10 block/blk-core.c:994 submit_bio+0xb1/0x440 block/blk-core.c:1163 dio_bio_submit fs/direct-io.c:482 [inline] dio_send_cur_page fs/direct-io.c:818 [inline] submit_page_section fs/direct-io.c:875 [inline] do_direct_IO fs/direct-io.c:1089 [inline] do_blockdev_direct_IO+0x6a9d/0x8500 fs/direct-io.c:1327 ext4_direct_IO_read fs/ext4/inode.c:3881 [inline] ext4_direct_IO+0x502/0x1920 fs/ext4/inode.c:3913 generic_file_read_iter+0x302/0x29c0 mm/filemap.c:2323 ext4_file_read_iter+0x145/0x1b0 fs/ext4/file.c:77 call_read_iter include/linux/fs.h:1864 [inline] new_sync_read+0x418/0x6d0 fs/read_write.c:414 __vfs_read+0xc9/0x100 fs/read_write.c:427 vfs_read+0x1ea/0x430 fs/read_write.c:461 ksys_read+0x127/0x250 fs/read_write.c:587 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: 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:449 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:1465 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 ffff8881d616db00 which belongs to the cache sgpool-32 of size 1024 The buggy address is located 56 bytes to the right of 1024-byte region [ffff8881d616db00, ffff8881d616df00) The buggy address belongs to the page: page:ffffea0007585b00 refcount:1 mapcount:0 mapping:ffff8881d7b64f00 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881d7b64f00 raw: 0000000000000000 00000000000e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d616de00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d616de80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d616df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881d616df80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d616e000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================