==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x9a/0xa0 lib/list_debug.c:26
Read of size 8 at addr ffff88809f667060 by task syz-executor.5/11435
CPU: 1 PID: 11435 Comm: syz-executor.5 Not tainted 4.19.100-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.cold+0x7c/0x20d 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+0x8c/0x2ba mm/kasan/report.c:396
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
__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:2380 [inline]
rdma_listen+0x63b/0x8e0 drivers/infiniband/core/cma.c:3408
ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1100
ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
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:00007fa839675c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa8396766d4 RCX: 000000000045b349
RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000004
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000c84 R14: 00000000004cd5d6 R15: 000000000075c07c
Allocated by task 11197:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc mm/kasan/kasan.c:553 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
kmem_cache_alloc_trace+0x152/0x760 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
kzalloc include/linux/slab.h:709 [inline]
__rdma_create_id+0x5e/0x610 drivers/infiniband/core/cma.c:784
ucma_create_id+0x1de/0x640 drivers/infiniband/core/ucma.c:506
ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 11196:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3503 [inline]
kfree+0xcf/0x220 mm/slab.c:3822
rdma_destroy_id+0x726/0xab0 drivers/infiniband/core/cma.c:1752
ucma_close+0x115/0x320 drivers/infiniband/core/ucma.c:1770
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff88809f666e80
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 480 bytes inside of
2048-byte region [ffff88809f666e80, ffff88809f667680)
The buggy address belongs to the page:
page:ffffea00027d9980 count:1 mapcount:0 mapping:ffff88812c31cc40 index:0xffff88809f667700 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea00024d1588 ffffea0002a30088 ffff88812c31cc40
raw: ffff88809f667700 ffff88809f666600 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809f666f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809f666f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809f667000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809f667080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809f667100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================