[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.46' (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 program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 35.069828] ================================================================== [ 35.077294] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 35.083783] Read of size 8 at addr ffff888092daa218 by task syz-executor272/11601 [ 35.091384] [ 35.093007] CPU: 1 PID: 11601 Comm: syz-executor272 Not tainted 4.14.286-syzkaller #0 [ 35.100955] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 35.110291] Call Trace: [ 35.112875] dump_stack+0x1b2/0x281 [ 35.116484] print_address_description.cold+0x54/0x1d3 [ 35.122089] kasan_report_error.cold+0x8a/0x191 [ 35.126756] ? __list_add_valid+0x93/0xa0 [ 35.130884] __asan_report_load8_noabort+0x68/0x70 [ 35.135804] ? __list_add_valid+0x93/0xa0 [ 35.139933] __list_add_valid+0x93/0xa0 [ 35.143886] rdma_listen+0x656/0x9b0 [ 35.147578] ucma_listen+0x10b/0x170 [ 35.151275] ? ucma_bind_ip+0x150/0x150 [ 35.155231] ? _copy_from_user+0x96/0x100 [ 35.159352] ? ucma_bind_ip+0x150/0x150 [ 35.163302] ucma_write+0x206/0x2c0 executing program [ 35.166909] ? ucma_set_ib_path+0x510/0x510 [ 35.171221] __vfs_write+0xe4/0x630 [ 35.174835] ? ucma_set_ib_path+0x510/0x510 [ 35.179224] ? debug_check_no_obj_freed+0x2c0/0x680 [ 35.184229] ? kernel_read+0x110/0x110 [ 35.188117] ? common_file_perm+0x3ee/0x580 [ 35.192419] ? security_file_permission+0x82/0x1e0 [ 35.197334] ? rw_verify_area+0xe1/0x2a0 [ 35.201396] vfs_write+0x17f/0x4d0 [ 35.204936] SyS_write+0xf2/0x210 [ 35.208379] ? SyS_read+0x210/0x210 [ 35.212016] ? __do_page_fault+0x159/0xad0 [ 35.216241] ? do_syscall_64+0x4c/0x640 executing program executing program [ 35.220203] ? SyS_read+0x210/0x210 [ 35.223812] do_syscall_64+0x1d5/0x640 [ 35.227693] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.232877] RIP: 0033:0x7f382e1deb49 [ 35.236581] RSP: 002b:00007f382e190318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 35.244270] RAX: ffffffffffffffda RBX: 00007f382e266408 RCX: 00007f382e1deb49 [ 35.251548] RDX: 0000000000000010 RSI: 0000000020000140 RDI: 0000000000000003 [ 35.258801] RBP: 00007f382e266400 R08: 0000000000000000 R09: 0000000000000000 [ 35.266050] R10: 0000000000000000 R11: 0000000000000246 R12: 006d635f616d6472 [ 35.273323] R13: 00007ffc8783227f R14: 00007f382e190400 R15: 0000000000022000 [ 35.280590] [ 35.282200] Allocated by task 11595: [ 35.285898] kasan_kmalloc+0xeb/0x160 [ 35.289686] kmem_cache_alloc_trace+0x131/0x3d0 [ 35.294339] rdma_create_id+0x57/0x4c0 [ 35.298206] ucma_create_id+0x18b/0x500 [ 35.302165] ucma_write+0x206/0x2c0 [ 35.305786] __vfs_write+0xe4/0x630 [ 35.309389] vfs_write+0x17f/0x4d0 [ 35.312904] SyS_write+0xf2/0x210 [ 35.316342] do_syscall_64+0x1d5/0x640 [ 35.320210] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.325387] [ 35.326993] Freed by task 11615: [ 35.330342] kasan_slab_free+0xc3/0x1a0 [ 35.334310] kfree+0xc9/0x250 [ 35.337397] ucma_close+0x11a/0x340 [ 35.341000] __fput+0x25f/0x7a0 [ 35.344268] task_work_run+0x11f/0x190 [ 35.348132] do_exit+0xa44/0x2850 [ 35.351563] do_group_exit+0x100/0x2e0 [ 35.355435] get_signal+0x38d/0x1ca0 [ 35.359131] do_signal+0x7c/0x1550 [ 35.362650] exit_to_usermode_loop+0x160/0x200 [ 35.367214] do_syscall_64+0x4a3/0x640 [ 35.371079] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.376236] [ 35.377844] The buggy address belongs to the object at ffff888092daa040 [ 35.377844] which belongs to the cache kmalloc-1024 of size 1024 [ 35.390648] The buggy address is located 472 bytes inside of [ 35.390648] 1024-byte region [ffff888092daa040, ffff888092daa440) [ 35.402581] The buggy address belongs to the page: [ 35.407485] page:ffffea00024b6a80 count:1 mapcount:0 mapping:ffff888092daa040 index:0x0 compound_mapcount: 0 [ 35.417428] flags: 0xfff00000008100(slab|head) [ 35.421985] raw: 00fff00000008100 ffff888092daa040 0000000000000000 0000000100000007 [ 35.429850] raw: ffffea0002aa9720 ffffea00024b7420 ffff88813fe74ac0 0000000000000000 [ 35.437711] page dumped because: kasan: bad access detected [ 35.443395] [ 35.444999] Memory state around the buggy address: [ 35.449910] ffff888092daa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.457245] ffff888092daa180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.464578] >ffff888092daa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 35.471910] ^ [ 35.476032] ffff888092daa280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.483372] ffff888092daa300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.490713] ================================================================== [ 35.498049] Disabling lock debugging due to kernel taint [ 35.505435] Kernel panic - not syncing: panic_on_warn set ... [ 35.505435] [ 35.512801] CPU: 1 PID: 11601 Comm: syz-executor272 Tainted: G B 4.14.286-syzkaller #0 executing program [ 35.521972] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 35.531313] Call Trace: [ 35.533898] dump_stack+0x1b2/0x281 [ 35.537519] panic+0x1f9/0x42d [ 35.540705] ? add_taint.cold+0x16/0x16 [ 35.544673] ? ___preempt_schedule+0x16/0x18 [ 35.549652] kasan_end_report+0x43/0x49 [ 35.553605] kasan_report_error.cold+0xa7/0x191 [ 35.558252] ? __list_add_valid+0x93/0xa0 [ 35.562380] __asan_report_load8_noabort+0x68/0x70 [ 35.567302] ? __list_add_valid+0x93/0xa0 [ 35.571424] __list_add_valid+0x93/0xa0 [ 35.575376] rdma_listen+0x656/0x9b0 [ 35.579078] ucma_listen+0x10b/0x170 [ 35.582763] ? ucma_bind_ip+0x150/0x150 [ 35.586915] ? _copy_from_user+0x96/0x100 [ 35.591046] ? ucma_bind_ip+0x150/0x150 [ 35.594997] ucma_write+0x206/0x2c0 [ 35.598598] ? ucma_set_ib_path+0x510/0x510 [ 35.602894] __vfs_write+0xe4/0x630 [ 35.606495] ? ucma_set_ib_path+0x510/0x510 [ 35.610793] ? debug_check_no_obj_freed+0x2c0/0x680 [ 35.615788] ? kernel_read+0x110/0x110 [ 35.619650] ? common_file_perm+0x3ee/0x580 [ 35.623948] ? security_file_permission+0x82/0x1e0 [ 35.628849] ? rw_verify_area+0xe1/0x2a0 [ 35.632884] vfs_write+0x17f/0x4d0 [ 35.636397] SyS_write+0xf2/0x210 [ 35.639822] ? SyS_read+0x210/0x210 [ 35.643423] ? __do_page_fault+0x159/0xad0 [ 35.647631] ? do_syscall_64+0x4c/0x640 [ 35.651582] ? SyS_read+0x210/0x210 [ 35.655185] do_syscall_64+0x1d5/0x640 [ 35.659052] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.664216] RIP: 0033:0x7f382e1deb49 [ 35.667903] RSP: 002b:00007f382e190318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 35.675592] RAX: ffffffffffffffda RBX: 00007f382e266408 RCX: 00007f382e1deb49 [ 35.682936] RDX: 0000000000000010 RSI: 0000000020000140 RDI: 0000000000000003 [ 35.690196] RBP: 00007f382e266400 R08: 0000000000000000 R09: 0000000000000000 [ 35.697444] R10: 0000000000000000 R11: 0000000000000246 R12: 006d635f616d6472 [ 35.704686] R13: 00007ffc8783227f R14: 00007f382e190400 R15: 0000000000022000 [ 35.712104] Kernel Offset: disabled [ 35.715715] Rebooting in 86400 seconds..