================================================================== BUG: KASAN: use-after-free in eth_header_parse_protocol+0xdc/0xe0 net/ethernet/eth.c:283 Read of size 2 at addr ffff88801bd40c0b by task syz-executor628/8436 CPU: 1 PID: 8436 Comm: syz-executor628 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 eth_header_parse_protocol+0xdc/0xe0 net/ethernet/eth.c:283 dev_parse_header_protocol include/linux/netdevice.h:3264 [inline] virtio_net_hdr_to_skb.constprop.0+0x99d/0xcd0 include/linux/virtio_net.h:83 packet_snd net/packet/af_packet.c:2994 [inline] packet_sendmsg+0x233c/0x5300 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 sock_no_sendpage+0xf3/0x130 net/core/sock.c:2860 kernel_sendpage.part.0+0x1ab/0x350 net/socket.c:3631 kernel_sendpage net/socket.c:3628 [inline] sock_sendpage+0xe5/0x140 net/socket.c:947 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] do_splice+0xb7e/0x1940 fs/splice.c:1079 __do_splice+0x134/0x250 fs/splice.c:1144 __do_sys_splice fs/splice.c:1350 [inline] __se_sys_splice fs/splice.c:1332 [inline] __x64_sys_splice+0x198/0x250 fs/splice.c:1332 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x445959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3682a052f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00000000004ca458 RCX: 0000000000445959 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004ca450 R08: 0000000004f44115 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ca45c R13: 000000000049a074 R14: 6d32cc5e8ead0600 R15: 0000000000022000 Allocated by task 114: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:427 [inline] __kasan_slab_alloc+0x75/0x90 mm/kasan/common.c:460 kasan_slab_alloc include/linux/kasan.h:223 [inline] slab_post_alloc_hook mm/slab.h:516 [inline] slab_alloc_node mm/slub.c:2907 [inline] kmem_cache_alloc_node+0x164/0x3b0 mm/slub.c:2943 blk_alloc_queue+0x28/0x700 block/blk-core.c:524 blk_mq_init_queue_data block/blk-mq.c:3030 [inline] blk_mq_init_queue+0x44/0xd0 block/blk-mq.c:3049 scsi_mq_alloc_queue+0x3e/0x170 drivers/scsi/scsi_lib.c:1891 scsi_alloc_sdev+0x7f6/0xc00 drivers/scsi/scsi_scan.c:268 scsi_probe_and_add_lun+0x216a/0x3520 drivers/scsi/scsi_scan.c:1077 __scsi_scan_target+0x225/0xe40 drivers/scsi/scsi_scan.c:1561 scsi_scan_channel drivers/scsi/scsi_scan.c:1649 [inline] scsi_scan_channel+0x14b/0x1f0 drivers/scsi/scsi_scan.c:1625 scsi_scan_host_selected+0x2e7/0x3c0 drivers/scsi/scsi_scan.c:1678 do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1817 do_scan_async+0x3e/0x510 drivers/scsi/scsi_scan.c:1827 async_run_entry_fn+0xd3/0x6f0 kernel/async.c:123 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 __call_rcu kernel/rcu/tree.c:3039 [inline] call_rcu+0xb1/0x740 kernel/rcu/tree.c:3114 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 scsi_device_dev_release_usercontext+0x5d6/0xcb0 drivers/scsi/scsi_sysfs.c:476 execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327 device_release+0x9f/0x240 drivers/base/core.c:2108 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 put_device+0x1b/0x30 drivers/base/core.c:3341 __scsi_remove_device+0x1dd/0x3d0 drivers/scsi/scsi_sysfs.c:1466 scsi_probe_and_add_lun+0x1f79/0x3520 drivers/scsi/scsi_scan.c:1177 __scsi_scan_target+0x225/0xe40 drivers/scsi/scsi_scan.c:1561 scsi_scan_channel drivers/scsi/scsi_scan.c:1649 [inline] scsi_scan_channel+0x14b/0x1f0 drivers/scsi/scsi_scan.c:1625 scsi_scan_host_selected+0x2e7/0x3c0 drivers/scsi/scsi_scan.c:1678 do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1817 do_scan_async+0x3e/0x510 drivers/scsi/scsi_scan.c:1827 async_run_entry_fn+0xd3/0x6f0 kernel/async.c:123 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 The buggy address belongs to the object at ffff88801bd40000 which belongs to the cache request_queue of size 3432 The buggy address is located 3083 bytes inside of 3432-byte region [ffff88801bd40000, ffff88801bd40d68) The buggy address belongs to the page: page:ffffea00006f5000 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801bd46f40 pfn:0x1bd40 head:ffffea00006f5000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 ffffea00006f3800 0000000500000005 ffff888141277000 raw: ffff88801bd46f40 0000000080090000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801bd40b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801bd40b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801bd40c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801bd40c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801bd40d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================