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BUG: KASAN: use-after-free in __list_del_entry_valid+0xd6/0xef lib/list_debug.c:54
Read of size 8 at addr ffff888080936428 by task syz-executor.0/16952

CPU: 1 PID: 16952 Comm: syz-executor.0 Not tainted 4.19.113-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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x212 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x88/0x2b9 mm/kasan/report.c:396
 __list_del_entry_valid+0xd6/0xef lib/list_debug.c:54
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 cma_cancel_listens drivers/infiniband/core/cma.c:1625 [inline]
 cma_cancel_operation drivers/infiniband/core/cma.c:1653 [inline]
 cma_cancel_operation+0x2c6/0x9f0 drivers/infiniband/core/cma.c:1641
 rdma_destroy_id+0x8b/0xab0 drivers/infiniband/core/cma.c:1717
 ucma_destroy_id+0x304/0x460 drivers/infiniband/core/ucma.c:638
 ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0xf7/0x760 fs/read_write.c:485
 vfs_write+0x206/0x550 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5ffc28fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5ffc2906d4 RCX: 000000000045c849
RDX: 0000000000000018 RSI: 00000000200000c0 RDI: 0000000000000006
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000cb9 R14: 00000000004d81b8 R15: 000000000076bfac

Allocated by task 16950:
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
 kmem_cache_alloc_trace+0x14d/0x7a0 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 __rdma_create_id+0x5b/0x630 drivers/infiniband/core/cma.c:784
 ucma_create_id+0x1cb/0x5a0 drivers/infiniband/core/ucma.c:506
 ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0xf7/0x760 fs/read_write.c:485
 vfs_write+0x206/0x550 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 16957:
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/kasan.c:521
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xce/0x220 mm/slab.c:3822
 ucma_destroy_id+0x304/0x460 drivers/infiniband/core/ucma.c:638
 ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1689
 __vfs_write+0xf7/0x760 fs/read_write.c:485
 vfs_write+0x206/0x550 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888080936240
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 488 bytes inside of
 2048-byte region [ffff888080936240, ffff888080936a40)
The buggy address belongs to the page:
page:ffffea0002024d80 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea00013b9308 ffffea00013bc808 ffff88812c3dcc40
raw: 0000000000000000 ffff888080936240 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888080936300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888080936380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888080936400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888080936480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888080936500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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