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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 ffff8880579b0760 by task syz-executor.3/15577
CPU: 0 PID: 15577 Comm: syz-executor.3 Not tainted 5.0.0-rc8+ #88
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+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
__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:2477 [inline]
rdma_listen+0x63b/0x8e0 drivers/infiniband/core/cma.c:3492
ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1100
ucma_write+0x2da/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x116/0x8e0 fs/read_write.c:485
vfs_write+0x20c/0x580 fs/read_write.c:549
ksys_write+0xea/0x1f0 fs/read_write.c:598
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:607
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e29
Code: ad b8 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 b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcc56bfcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29
RDX: 00000000ffffff3a RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc56bfd6d4
R13: 00000000004c70d9 R14: 00000000004dcb90 R15: 00000000ffffffff
Allocated by task 15566:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_kmalloc mm/kasan/common.c:495 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:468
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:509
kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3615
kmalloc include/linux/slab.h:545 [inline]
kzalloc include/linux/slab.h:740 [inline]
__rdma_create_id+0x5f/0x4e0 drivers/infiniband/core/cma.c:879
ucma_create_id+0x1de/0x640 drivers/infiniband/core/ucma.c:506
ucma_write+0x2da/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x116/0x8e0 fs/read_write.c:485
vfs_write+0x20c/0x580 fs/read_write.c:549
ksys_write+0xea/0x1f0 fs/read_write.c:598
__do_sys_write fs/read_write.c:610 [inline]
__se_sys_write fs/read_write.c:607 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:607
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 15558:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:457
kasan_slab_free+0xe/0x10 mm/kasan/common.c:465
__cache_free mm/slab.c:3494 [inline]
kfree+0xcf/0x230 mm/slab.c:3811
rdma_destroy_id+0x723/0xab0 drivers/infiniband/core/cma.c:1849
ucma_close+0x115/0x320 drivers/infiniband/core/ucma.c:1770
__fput+0x2df/0x8d0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x14a/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880579b0580
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 480 bytes inside of
2048-byte region [ffff8880579b0580, ffff8880579b0d80)
The buggy address belongs to the page:
page:ffffea00015e6c00 count:1 mapcount:0 mapping:ffff88812c3f0c40 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002195708 ffffea000276e208 ffff88812c3f0c40
raw: 0000000000000000 ffff8880579b0580 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880579b0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880579b0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880579b0700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880579b0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880579b0800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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