sctp: [Deprecated]: syz-executor.0 (pid 10715) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ================================================================== BUG: KASAN: slab-out-of-bounds in sctp_setsockopt_delayed_ack net/sctp/socket.c:2771 [inline] BUG: KASAN: slab-out-of-bounds in sctp_setsockopt net/sctp/socket.c:4499 [inline] BUG: KASAN: slab-out-of-bounds in sctp_setsockopt+0x9488/0x95e0 net/sctp/socket.c:4431 Write of size 4 at addr ffff888098188a88 by task syz-executor.0/10715 CPU: 0 PID: 10715 Comm: syz-executor.0 Not tainted 5.8.0-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:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 sctp_setsockopt_delayed_ack net/sctp/socket.c:2771 [inline] sctp_setsockopt net/sctp/socket.c:4499 [inline] sctp_setsockopt+0x9488/0x95e0 net/sctp/socket.c:4431 __sys_setsockopt+0x337/0x6a0 net/socket.c:2137 __do_sys_setsockopt net/socket.c:2153 [inline] __se_sys_setsockopt net/socket.c:2150 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2150 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c1f9 Code: Bad RIP value. RSP: 002b:00007f3d8254bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000002e5c0 RCX: 000000000045c1f9 RDX: 0000000000000010 RSI: 0000000000000084 RDI: 0000000000000003 RBP: 000000000078bf50 R08: 0000000000000008 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffcc379dcdf R14: 00007f3d8254c9c0 R15: 000000000078bf0c Allocated by task 10715: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc_track_caller+0x178/0x330 mm/slab.c:3671 memdup_user+0x22/0xd0 mm/util.c:172 sctp_setsockopt net/sctp/socket.c:4452 [inline] sctp_setsockopt+0x17a/0x95e0 net/sctp/socket.c:4431 __sys_setsockopt+0x337/0x6a0 net/socket.c:2137 __do_sys_setsockopt net/socket.c:2153 [inline] __se_sys_setsockopt net/socket.c:2150 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2150 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 10177: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 __cache_free mm/slab.c:3426 [inline] kfree+0x103/0x2c0 mm/slab.c:3757 kfree_const+0x51/0x60 mm/util.c:40 kernfs_put.part.0+0x159/0x540 fs/kernfs/dir.c:528 kernfs_put+0x42/0x50 fs/kernfs/dir.c:511 sysfs_put include/linux/sysfs.h:611 [inline] kobject_del+0xfc/0x1f0 lib/kobject.c:631 kobject_cleanup lib/kobject.c:687 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f5/0x270 lib/kobject.c:739 net_rx_queue_update_kobjects+0x33f/0x440 net/core/net-sysfs.c:1024 remove_queue_kobjects net/core/net-sysfs.c:1699 [inline] netdev_unregister_kobject+0x149/0x1e0 net/core/net-sysfs.c:1850 rollback_registered_many+0xa07/0xf60 net/core/dev.c:9013 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10131 unregister_netdevice_many net/core/dev.c:10130 [inline] default_device_exit_batch+0x30c/0x3d0 net/core/dev.c:10614 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189 setup_net+0x502/0x850 net/core/net_namespace.c:364 copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482 create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2979 __do_sys_unshare kernel/fork.c:3047 [inline] __se_sys_unshare kernel/fork.c:3045 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3045 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888098188a80 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 8 bytes inside of 32-byte region [ffff888098188a80, ffff888098188aa0) The buggy address belongs to the page: page:ffffea0002606200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888098188fc1 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea000256d0c8 ffffea0002a1bc08 ffff8880aa0001c0 raw: ffff888098188fc1 ffff888098188000 0000000100000036 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888098188980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888098188a00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888098188a80: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff888098188b00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff888098188b80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================