Warning: Permanently added '10.128.1.25' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 30.068226] ================================================================== [ 30.075652] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 30.082123] Read of size 8 at addr ffff8880b0778698 by task syz-executor146/10288 [ 30.089737] [ 30.091366] CPU: 0 PID: 10288 Comm: syz-executor146 Not tainted 4.14.295-syzkaller #0 [ 30.099315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 30.108644] Call Trace: [ 30.111210] dump_stack+0x1b2/0x281 [ 30.114839] print_address_description.cold+0x54/0x1d3 [ 30.120098] kasan_report_error.cold+0x8a/0x191 [ 30.124754] ? __list_add_valid+0x93/0xa0 [ 30.128884] __asan_report_load8_noabort+0x68/0x70 [ 30.133796] ? __list_add_valid+0x93/0xa0 [ 30.137922] __list_add_valid+0x93/0xa0 [ 30.141875] rdma_listen+0x656/0x9b0 [ 30.145568] ucma_listen+0x10b/0x170 [ 30.149258] ? ucma_bind_ip+0x150/0x150 [ 30.153210] ? _copy_from_user+0x96/0x100 [ 30.157332] ? ucma_bind_ip+0x150/0x150 [ 30.161282] ucma_write+0x206/0x2c0 [ 30.164887] ? ucma_set_ib_path+0x510/0x510 [ 30.169212] __vfs_write+0xe4/0x630 [ 30.172821] ? ucma_set_ib_path+0x510/0x510 [ 30.177124] ? kernel_read+0x110/0x110 [ 30.180998] ? common_file_perm+0x3ee/0x580 [ 30.185308] ? security_file_permission+0x82/0x1e0 [ 30.190218] ? rw_verify_area+0xe1/0x2a0 [ 30.194260] vfs_write+0x17f/0x4d0 [ 30.197789] SyS_write+0xf2/0x210 [ 30.201227] ? SyS_read+0x210/0x210 [ 30.204837] ? do_syscall_64+0x4c/0x640 [ 30.208807] ? SyS_read+0x210/0x210 [ 30.212432] do_syscall_64+0x1d5/0x640 [ 30.216317] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.221491] RIP: 0033:0x7f6868546a39 [ 30.225182] RSP: 002b:00007f68684d7318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.232873] RAX: ffffffffffffffda RBX: 00007f68685ce418 RCX: 00007f6868546a39 [ 30.240121] RDX: 0000000000000010 RSI: 00000000200002c0 RDI: 0000000000000003 [ 30.247377] RBP: 00007f68685ce410 R08: 00007f68684d7700 R09: 0000000000000000 [ 30.254637] R10: 00007f68684d7700 R11: 0000000000000246 R12: 006d635f616d6472 [ 30.261892] R13: 00007ffc6a03656f R14: 00007f68684d7400 R15: 0000000000022000 [ 30.269152] [ 30.270769] Allocated by task 9266: [ 30.274387] kasan_kmalloc+0xeb/0x160 [ 30.278177] kmem_cache_alloc_trace+0x131/0x3d0 [ 30.282830] rdma_create_id+0x57/0x4c0 [ 30.286700] ucma_create_id+0x18b/0x500 [ 30.290653] ucma_write+0x206/0x2c0 [ 30.294262] __vfs_write+0xe4/0x630 [ 30.297868] vfs_write+0x17f/0x4d0 [ 30.301388] SyS_write+0xf2/0x210 [ 30.304822] do_syscall_64+0x1d5/0x640 [ 30.308694] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.313862] [ 30.315469] Freed by task 9268: [ 30.318729] kasan_slab_free+0xc3/0x1a0 [ 30.322691] kfree+0xc9/0x250 [ 30.325778] ucma_close+0x11a/0x340 [ 30.329465] __fput+0x25f/0x7a0 [ 30.332721] task_work_run+0x11f/0x190 [ 30.336582] do_exit+0xa44/0x2850 [ 30.340035] do_group_exit+0x100/0x2e0 [ 30.343908] get_signal+0x38d/0x1ca0 [ 30.347604] do_signal+0x7c/0x1550 [ 30.351131] exit_to_usermode_loop+0x160/0x200 [ 30.355700] do_syscall_64+0x4a3/0x640 [ 30.359570] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.364740] [ 30.366352] The buggy address belongs to the object at ffff8880b07784c0 [ 30.366352] which belongs to the cache kmalloc-1024 of size 1024 [ 30.379169] The buggy address is located 472 bytes inside of [ 30.379169] 1024-byte region [ffff8880b07784c0, ffff8880b07788c0) [ 30.391112] The buggy address belongs to the page: [ 30.396025] page:ffffea0002c1de00 count:1 mapcount:0 mapping:ffff8880b0778040 index:0x0 compound_mapcount: 0 [ 30.405973] flags: 0xfff00000008100(slab|head) [ 30.410555] raw: 00fff00000008100 ffff8880b0778040 0000000000000000 0000000100000007 [ 30.418418] raw: ffffea0002bfa8a0 ffffea0002bf0aa0 ffff88813fe74ac0 0000000000000000 [ 30.426293] page dumped because: kasan: bad access detected [ 30.431982] [ 30.433591] Memory state around the buggy address: [ 30.438501] ffff8880b0778580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.445841] ffff8880b0778600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.453187] >ffff8880b0778680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.460534] ^ [ 30.464672] ffff8880b0778700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.472015] ffff8880b0778780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.479377] ================================================================== [ 30.486716] Disabling lock debugging due to kernel taint [ 30.494195] Kernel panic - not syncing: panic_on_warn set ... [ 30.494195] [ 30.501736] CPU: 0 PID: 10288 Comm: syz-executor146 Tainted: G B 4.14.295-syzkaller #0 [ 30.510912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 30.520260] Call Trace: [ 30.522838] dump_stack+0x1b2/0x281 [ 30.526444] panic+0x1f9/0x42d [ 30.529614] ? add_taint.cold+0x16/0x16 [ 30.533570] ? ___preempt_schedule+0x16/0x18 [ 30.538030] kasan_end_report+0x43/0x49 [ 30.541985] kasan_report_error.cold+0xa7/0x191 [ 30.546644] ? __list_add_valid+0x93/0xa0 [ 30.550781] __asan_report_load8_noabort+0x68/0x70 [ 30.555690] ? __list_add_valid+0x93/0xa0 [ 30.559832] __list_add_valid+0x93/0xa0 [ 30.563788] rdma_listen+0x656/0x9b0 [ 30.567478] ucma_listen+0x10b/0x170 [ 30.571168] ? ucma_bind_ip+0x150/0x150 [ 30.575123] ? _copy_from_user+0x96/0x100 [ 30.579305] ? ucma_bind_ip+0x150/0x150 [ 30.583293] ucma_write+0x206/0x2c0 [ 30.586897] ? ucma_set_ib_path+0x510/0x510 [ 30.591198] __vfs_write+0xe4/0x630 [ 30.594804] ? ucma_set_ib_path+0x510/0x510 [ 30.599102] ? kernel_read+0x110/0x110 [ 30.602968] ? common_file_perm+0x3ee/0x580 [ 30.607270] ? security_file_permission+0x82/0x1e0 [ 30.612189] ? rw_verify_area+0xe1/0x2a0 [ 30.616234] vfs_write+0x17f/0x4d0 [ 30.619760] SyS_write+0xf2/0x210 [ 30.623195] ? SyS_read+0x210/0x210 [ 30.626801] ? do_syscall_64+0x4c/0x640 [ 30.631703] ? SyS_read+0x210/0x210 [ 30.635309] do_syscall_64+0x1d5/0x640 [ 30.639180] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.644344] RIP: 0033:0x7f6868546a39 [ 30.648029] RSP: 002b:00007f68684d7318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.655722] RAX: ffffffffffffffda RBX: 00007f68685ce418 RCX: 00007f6868546a39 [ 30.662970] RDX: 0000000000000010 RSI: 00000000200002c0 RDI: 0000000000000003 [ 30.670217] RBP: 00007f68685ce410 R08: 00007f68684d7700 R09: 0000000000000000 [ 30.677461] R10: 00007f68684d7700 R11: 0000000000000246 R12: 006d635f616d6472 [ 30.684707] R13: 00007ffc6a03656f R14: 00007f68684d7400 R15: 0000000000022000 [ 30.692200] Kernel Offset: disabled [ 30.695813] Rebooting in 86400 seconds..