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BUG: KASAN: use-after-free in __list_add_valid+0x9a/0xa0 lib/list_debug.c:26
Read of size 8 at addr ffff888074b8e658 by task syz-executor088/7101

CPU: 0 PID: 7101 Comm: syz-executor088 Not tainted 4.14.124 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 __list_add_valid+0x9a/0xa0 lib/list_debug.c:26
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 cma_listen_on_all drivers/infiniband/core/cma.c:2320 [inline]
 rdma_listen+0x5a7/0x840 drivers/infiniband/core/cma.c:3318
 ucma_listen+0x10e/0x170 drivers/infiniband/core/ucma.c:1078
 ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672
 __vfs_write+0x105/0x6b0 fs/read_write.c:480
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x441379
RSP: 002b:00007ffd12a95c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441379
RDX: 0000000000000010 RSI: 00000000200002c0 RDI: 0000000000000003
RBP: 0000000000011c1f R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004021a0
R13: 0000000000402230 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 7039:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 rdma_create_id+0x5a/0x4d0 drivers/infiniband/core/cma.c:790
 ucma_create_id+0x19b/0x5b0 drivers/infiniband/core/ucma.c:484
 ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672
 __vfs_write+0x105/0x6b0 fs/read_write.c:480
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 7039:
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 rdma_destroy_id+0x6fb/0xb70 drivers/infiniband/core/cma.c:1725
 ucma_close+0x110/0x310 drivers/infiniband/core/ucma.c:1753
 __fput+0x275/0x7a0 fs/file_table.c:210
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x114/0x190 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x7df/0x2c10 kernel/exit.c:874
 do_group_exit+0x111/0x330 kernel/exit.c:977
 SYSC_exit_group kernel/exit.c:988 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:986
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff888074b8e480
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 472 bytes inside of
 1024-byte region [ffff888074b8e480, ffff888074b8e880)
The buggy address belongs to the page:
page:ffffea0001d2e380 count:1 mapcount:0 mapping:ffff888074b8e000 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff888074b8e000 0000000000000000 0000000100000007
raw: ffffea0001d2e320 ffffea0001e8e4a0 ffff8880aa800ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888074b8e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888074b8e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888074b8e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff888074b8e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888074b8e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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