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BUG: KASAN: use-after-free in __list_add_valid+0x58/0xc0 lib/list_debug.c:26
Read of size 8 at addr ffff8880600581e0 by task syz-executor.5/27911
CPU: 0 PID: 27911 Comm: syz-executor.5 Not tainted 5.4.0-rc6+ #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+0x1fb/0x318 lib/dump_stack.c:118
print_address_description+0x75/0x5c0 mm/kasan/report.c:374
__kasan_report+0x14b/0x1c0 mm/kasan/report.c:506
kasan_report+0x26/0x50 mm/kasan/common.c:634
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__list_add_valid+0x58/0xc0 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:2509 [inline]
rdma_listen+0x322/0x9a0 drivers/infiniband/core/cma.c:3563
ucma_listen+0x245/0x300 drivers/infiniband/core/ucma.c:1092
ucma_write+0x2da/0x360 drivers/infiniband/core/ucma.c:1684
__vfs_write+0xb8/0x740 fs/read_write.c:494
vfs_write+0x275/0x590 fs/read_write.c:558
ksys_write+0x117/0x220 fs/read_write.c:611
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:620
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a219
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:00007fc910ad9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc910ada6d4
R13: 00000000004ca93f R14: 00000000004e2ce8 R15: 00000000ffffffff
Allocated by task 27887:
save_stack mm/kasan/common.c:69 [inline]
set_track mm/kasan/common.c:77 [inline]
__kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:510
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524
kmem_cache_alloc_trace+0x221/0x2f0 mm/slab.c:3550
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:690 [inline]
__rdma_create_id+0x66/0x480 drivers/infiniband/core/cma.c:882
ucma_create_id+0x250/0x540 drivers/infiniband/core/ucma.c:501
ucma_write+0x2da/0x360 drivers/infiniband/core/ucma.c:1684
__vfs_write+0xb8/0x740 fs/read_write.c:494
vfs_write+0x275/0x590 fs/read_write.c:558
ksys_write+0x117/0x220 fs/read_write.c:611
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:620
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 27886:
save_stack mm/kasan/common.c:69 [inline]
set_track mm/kasan/common.c:77 [inline]
kasan_set_free_info mm/kasan/common.c:332 [inline]
__kasan_slab_free+0x12a/0x1e0 mm/kasan/common.c:471
kasan_slab_free+0xe/0x10 mm/kasan/common.c:480
__cache_free mm/slab.c:3425 [inline]
kfree+0x115/0x200 mm/slab.c:3756
rdma_destroy_id+0xea2/0x1080 drivers/infiniband/core/cma.c:1877
ucma_close+0x1eb/0x2c0 drivers/infiniband/core/ucma.c:1762
__fput+0x2e4/0x740 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:313
task_work_run+0x17e/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
prepare_exit_to_usermode+0x459/0x580 arch/x86/entry/common.c:194
syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:274
do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:300
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888060058000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 480 bytes inside of
2048-byte region [ffff888060058000, ffff888060058800)
The buggy address belongs to the page:
page:ffffea0001801600 refcount:1 mapcount:0 mapping:ffff8880aa400e00 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00024bf608 ffffea00015da048 ffff8880aa400e00
raw: 0000000000000000 ffff888060058000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888060058080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888060058100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888060058180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888060058200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888060058280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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