0000000031323438: 00 00 00 01 00 00 10 00 00 00 00 01 00 00 00 00 ................ 00000000016e4efb: 00 00 03 5a b4 24 02 00 04 00 00 04 00 00 00 00 ...Z.$.......... 000000001ab4388f: 00 00 00 00 00 ec 00 00 0c 09 0a 00 00 00 00 00 ................ ================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xe6/0xf5 lib/list_debug.c:51 XFS (loop5): SB validate failed with error -117. Read of size 8 at addr ffff888085378c60 by task syz-executor.3/3342 CPU: 1 PID: 3342 Comm: syz-executor.3 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_del_entry_valid+0xe6/0xf5 lib/list_debug.c:51 __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+0x2d7/0xa10 drivers/infiniband/core/cma.c:1641 rdma_destroy_id+0x8d/0xab0 drivers/infiniband/core/cma.c:1717 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 RIP: 0033:0x414f31 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffe81195d30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000414f31 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: ffffffff8100a4cb R09: 00000000113afa0b R10: 00007ffe81195e10 R11: 0000000000000293 R12: 000000000075bf20 R13: 000000000017831d R14: 0000000000761e30 R15: 000000000075bf2c Allocated by task 3346: 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 3344: 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 ffff888085378a80 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 480 bytes inside of 2048-byte region [ffff888085378a80, ffff888085379280) The buggy address belongs to the page: page:ffffea000214de00 count:1 mapcount:0 mapping:ffff88812c31cc40 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffffea0001751388 ffffea0002792708 ffff88812c31cc40 raw: 0000000000000000 ffff888085378200 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888085378b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888085378b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888085378c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888085378c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888085378d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================