sctp: [Deprecated]: syz-executor.0 (pid 15078) 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:2773 [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+0x91b5/0x95e0 net/sctp/socket.c:4431 Write of size 4 at addr ffff88805e0fca08 by task syz-executor.0/15078 CPU: 0 PID: 15078 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:2773 [inline] sctp_setsockopt net/sctp/socket.c:4499 [inline] sctp_setsockopt+0x91b5/0x95e0 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:00007ff896c93c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000002e900 RCX: 000000000045c1f9 RDX: 0000000000000010 RSI: 0000000000000084 RDI: 0000000000000004 RBP: 000000000078c090 R08: 0000000000000008 R09: 0000000000000000 R10: 00000000200002c0 R11: 0000000000000246 R12: 000000000078c04c R13: 00007ffe81a9e00f R14: 00007ff896c949c0 R15: 000000000078c04c Allocated by task 15078: 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 149: 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 __kernfs_remove+0x6ef/0xa30 fs/kernfs/dir.c:1344 kernfs_remove_by_name_ns+0x51/0xb0 fs/kernfs/dir.c:1516 kernfs_remove_by_name include/linux/kernfs.h:593 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:289 ib_free_port_attrs+0x33c/0x580 drivers/infiniband/core/sysfs.c:1324 remove_one_compat_dev drivers/infiniband/core/device.c:951 [inline] rdma_dev_exit_net+0x2fe/0x540 drivers/infiniband/core/device.c:1089 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:186 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:603 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 The buggy address belongs to the object at ffff88805e0fca00 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 8 bytes inside of 32-byte region [ffff88805e0fca00, ffff88805e0fca20) The buggy address belongs to the page: page:ffffea0001783f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805e0fcfc1 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea00024407c8 ffffea000286c108 ffff8880aa0001c0 raw: ffff88805e0fcfc1 ffff88805e0fc000 0000000100000027 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88805e0fc900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88805e0fc980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88805e0fca00: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88805e0fca80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88805e0fcb00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================