| TITLE: WARNING: suspicious RCU usage in rds_loop_conn_alloc |
| |
| [ 40.467154] ============================= |
| [ 40.471339] WARNING: suspicious RCU usage |
| [ 40.475501] 4.15.0+ #307 Not tainted |
| [ 40.479229] ----------------------------- |
| [ 40.483386] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! |
| [ 40.492665] |
| [ 40.492665] other info that might help us debug this: |
| [ 40.492665] |
| [ 40.500828] |
| [ 40.500828] rcu_scheduler_active = 2, debug_locks = 1 |
| [ 40.507516] 1 lock held by syz-executor1/6886: |
| [ 40.512120] #0: (rcu_read_lock){....}, at: [<00000000d1a2b4e9>] __rds_conn_create+0xe46/0x1b50 |
| [ 40.521101] |
| [ 40.521101] stack backtrace: |
| [ 40.525627] CPU: 1 PID: 6886 Comm: syz-executor1 Not tainted 4.15.0+ #307 |
| [ 40.532541] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 40.541884] Call Trace: |
| [ 40.544466] dump_stack+0x194/0x257 |
| [ 40.548094] ? arch_local_irq_restore+0x53/0x53 |
| [ 40.552780] lockdep_rcu_suspicious+0x123/0x170 |
| [ 40.557455] ___might_sleep+0x385/0x470 |
| [ 40.561428] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 40.567307] ? __debug_object_init+0x235/0x1040 |
| [ 40.571977] ? debug_mutex_init+0x1c/0x60 |
| [ 40.576132] __might_sleep+0x95/0x190 |
| [ 40.579937] kmem_cache_alloc_trace+0x299/0x740 |
| [ 40.584602] ? lock_acquire+0x1d5/0x580 |
| [ 40.588570] ? lock_acquire+0x1d5/0x580 |
| [ 40.592538] ? __rds_conn_create+0xe46/0x1b50 |
| [ 40.597039] rds_loop_conn_alloc+0xc8/0x380 |
| [ 40.601362] ? rds_loop_conn_free+0x290/0x290 |
| [ 40.605856] ? __init_waitqueue_head+0x97/0x140 |
| [ 40.610524] ? rcutorture_record_progress+0x10/0x10 |
| [ 40.615536] ? __lockdep_init_map+0xe4/0x650 |
| [ 40.619950] __rds_conn_create+0x112f/0x1b50 |
| [ 40.624387] ? rds_conn_drop+0xb0/0xb0 |
| [ 40.628294] ? __raw_spin_lock_init+0x1c/0x100 |
| [ 40.632878] ? trace_hardirqs_on_caller+0x421/0x5c0 |
| [ 40.637897] ? __lockdep_init_map+0xe4/0x650 |
| [ 40.642304] ? lockdep_init_map+0x9/0x10 |
| [ 40.646362] ? __init_waitqueue_head+0x97/0x140 |
| [ 40.651029] ? init_wait_entry+0x1b0/0x1b0 |
| [ 40.655278] ? lockdep_init_map+0x9/0x10 |
| [ 40.659351] ? rds_message_alloc+0x28c/0x330 |
| [ 40.663746] ? rds_message_next_extension+0x210/0x210 |
| [ 40.668923] ? trace_hardirqs_on+0xd/0x10 |
| [ 40.673073] ? _raw_spin_unlock_bh+0x30/0x40 |
| [ 40.677475] ? __release_sock+0x360/0x360 |
| [ 40.681597] ? lock_sock_nested+0x91/0x110 |
| [ 40.685815] rds_conn_create_outgoing+0x3f/0x50 |
| [ 40.690471] rds_sendmsg+0xda3/0x2390 |
| [ 40.694248] ? avc_has_perm+0x43e/0x680 |
| [ 40.698224] ? rds_send_drop_to+0x19d0/0x19d0 |
| [ 40.702696] ? iterate_fd+0x3f0/0x3f0 |
| [ 40.706477] ? debug_check_no_locks_freed+0x3c0/0x3c0 |
| [ 40.711646] ? find_held_lock+0x35/0x1d0 |
| [ 40.715690] ? sock_has_perm+0x2a4/0x420 |
| [ 40.719737] ? selinux_secmark_relabel_packet+0xc0/0xc0 |
| [ 40.725077] ? lock_release+0xa02/0xa40 |
| [ 40.729034] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 40.734896] ? __check_object_size+0x8b/0x530 |
| [ 40.739376] ? __might_sleep+0x95/0x190 |
| [ 40.743330] ? selinux_socket_sendmsg+0x36/0x40 |
| [ 40.747972] ? security_socket_sendmsg+0x89/0xb0 |
| [ 40.752706] ? rds_send_drop_to+0x19d0/0x19d0 |
| [ 40.757176] sock_sendmsg+0xca/0x110 |
| [ 40.760869] SYSC_sendto+0x361/0x5c0 |
| [ 40.764562] ? SYSC_connect+0x4a0/0x4a0 |
| [ 40.768511] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 40.774369] ? find_held_lock+0x35/0x1d0 |
| [ 40.778409] ? kcov_close+0x20/0x20 |
| [ 40.782013] ? _raw_spin_unlock+0x22/0x30 |
| [ 40.786142] ? kcov_ioctl+0x56/0x1b0 |
| [ 40.789834] ? do_vfs_ioctl+0x486/0x1520 |
| [ 40.793898] ? selinux_capable+0x40/0x40 |
| [ 40.797940] ? trace_hardirqs_on+0xd/0x10 |
| [ 40.802077] ? security_file_ioctl+0x7d/0xb0 |
| [ 40.806460] ? security_file_ioctl+0x89/0xb0 |
| [ 40.810848] SyS_sendto+0x40/0x50 |
| [ 40.814274] ? SyS_getpeername+0x30/0x30 |
| [ 40.818311] do_syscall_64+0x282/0x940 |
| [ 40.822175] ? finish_task_switch+0x5af/0x890 |
| [ 40.826651] ? syscall_return_slowpath+0x550/0x550 |
| [ 40.831554] ? syscall_return_slowpath+0x2ac/0x550 |
| [ 40.836459] ? prepare_exit_to_usermode+0x350/0x350 |
| [ 40.841451] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b |
| [ 40.846797] ? trace_hardirqs_off_thunk+0x1a/0x1c |
| [ 40.851619] entry_SYSCALL_64_after_hwframe+0x26/0x9b |
| [ 40.856784] RIP: 0033:0x4537d9 |
| [ 40.859949] RSP: 002b:00007f726e79bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c |
| [ 40.867627] RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 00000000004537d9 |
| [ 40.874868] RDX: 0000000000000000 RSI: 0000000020fbffff RDI: 0000000000000013 |
| [ 40.882119] RBP: 00000000000004b9 R08: 0000000020fc9000 R09: 0000000000000010 |
| [ 40.889361] R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f61f8 |
| [ 40.896605] R13: 00000000ffffffff R14: 00007f726e79c6d4 R15: 0000000000000005 |
| [ 40.903911] BUG: sleeping function called from invalid context at mm/slab.h:420 |
| [ 40.911359] in_atomic(): 1, irqs_disabled(): 0, pid: 6886, name: syz-executor1 |
| [ 40.918722] 1 lock held by syz-executor1/6886: |
| [ 40.923317] #0: (rcu_read_lock){....}, at: [<00000000d1a2b4e9>] __rds_conn_create+0xe46/0x1b50 |
| [ 40.932274] CPU: 1 PID: 6886 Comm: syz-executor1 Not tainted 4.15.0+ #307 |
| [ 40.939177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 40.948511] Call Trace: |
| [ 40.951086] dump_stack+0x194/0x257 |
| [ 40.954687] ? arch_local_irq_restore+0x53/0x53 |
| [ 40.959333] ? print_lock+0x9f/0xa2 |
| [ 40.962935] ? lockdep_print_held_locks+0xc4/0x130 |
| [ 40.967845] ___might_sleep+0x2b2/0x470 |
| [ 40.971801] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 40.977667] ? __debug_object_init+0x235/0x1040 |
| [ 40.982313] ? debug_mutex_init+0x1c/0x60 |
| [ 40.986440] __might_sleep+0x95/0x190 |
| [ 40.990219] kmem_cache_alloc_trace+0x299/0x740 |
| [ 40.994865] ? lock_acquire+0x1d5/0x580 |
| [ 40.998813] ? lock_acquire+0x1d5/0x580 |
| [ 41.002766] ? __rds_conn_create+0xe46/0x1b50 |
| [ 41.007239] rds_loop_conn_alloc+0xc8/0x380 |
| [ 41.011535] ? rds_loop_conn_free+0x290/0x290 |
| [ 41.016006] ? __init_waitqueue_head+0x97/0x140 |
| [ 41.020659] ? rcutorture_record_progress+0x10/0x10 |
| [ 41.025648] ? __lockdep_init_map+0xe4/0x650 |
| [ 41.030050] __rds_conn_create+0x112f/0x1b50 |
| [ 41.034456] ? rds_conn_drop+0xb0/0xb0 |
| [ 41.038327] ? __raw_spin_lock_init+0x1c/0x100 |
| [ 41.042884] ? trace_hardirqs_on_caller+0x421/0x5c0 |
| [ 41.047877] ? __lockdep_init_map+0xe4/0x650 |
| [ 41.052269] ? lockdep_init_map+0x9/0x10 |
| [ 41.056307] ? __init_waitqueue_head+0x97/0x140 |
| [ 41.060950] ? init_wait_entry+0x1b0/0x1b0 |
| [ 41.065161] ? lockdep_init_map+0x9/0x10 |
| [ 41.069197] ? rds_message_alloc+0x28c/0x330 |
| [ 41.073578] ? rds_message_next_extension+0x210/0x210 |
| [ 41.078738] ? trace_hardirqs_on+0xd/0x10 |
| [ 41.082866] ? _raw_spin_unlock_bh+0x30/0x40 |
| [ 41.087259] ? __release_sock+0x360/0x360 |
| [ 41.091378] ? lock_sock_nested+0x91/0x110 |
| [ 41.095593] rds_conn_create_outgoing+0x3f/0x50 |
| [ 41.100237] rds_sendmsg+0xda3/0x2390 |
| [ 41.104011] ? avc_has_perm+0x43e/0x680 |
| [ 41.107977] ? rds_send_drop_to+0x19d0/0x19d0 |
| [ 41.112455] ? iterate_fd+0x3f0/0x3f0 |
| [ 41.116232] ? debug_check_no_locks_freed+0x3c0/0x3c0 |
| [ 41.121398] ? find_held_lock+0x35/0x1d0 |
| [ 41.125462] ? sock_has_perm+0x2a4/0x420 |
| [ 41.129502] ? selinux_secmark_relabel_packet+0xc0/0xc0 |
| [ 41.134836] ? lock_release+0xa02/0xa40 |
| [ 41.138785] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 41.144642] ? __check_object_size+0x8b/0x530 |
| [ 41.149124] ? __might_sleep+0x95/0x190 |
| [ 41.153076] ? selinux_socket_sendmsg+0x36/0x40 |
| [ 41.157717] ? security_socket_sendmsg+0x89/0xb0 |
| [ 41.162447] ? rds_send_drop_to+0x19d0/0x19d0 |
| [ 41.166916] sock_sendmsg+0xca/0x110 |
| [ 41.170607] SYSC_sendto+0x361/0x5c0 |
| [ 41.174299] ? SYSC_connect+0x4a0/0x4a0 |
| [ 41.178245] ? trace_event_raw_event_sched_switch+0x810/0x810 |
| [ 41.184110] ? find_held_lock+0x35/0x1d0 |
| [ 41.188161] ? kcov_close+0x20/0x20 |
| [ 41.191763] ? _raw_spin_unlock+0x22/0x30 |
| [ 41.195890] ? kcov_ioctl+0x56/0x1b0 |
| [ 41.199580] ? do_vfs_ioctl+0x486/0x1520 |
| [ 41.203624] ? selinux_capable+0x40/0x40 |
| [ 41.207665] ? trace_hardirqs_on+0xd/0x10 |
| [ 41.211793] ? security_file_ioctl+0x7d/0xb0 |
| [ 41.216174] ? security_file_ioctl+0x89/0xb0 |
| [ 41.220559] SyS_sendto+0x40/0x50 |
| [ 41.223994] ? SyS_getpeername+0x30/0x30 |
| [ 41.228038] do_syscall_64+0x282/0x940 |
| [ 41.231900] ? finish_task_switch+0x5af/0x890 |
| [ 41.236370] ? syscall_return_slowpath+0x550/0x550 |
| [ 41.241275] ? syscall_return_slowpath+0x2ac/0x550 |
| [ 41.246180] ? prepare_exit_to_usermode+0x350/0x350 |
| [ 41.251172] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b |
| [ 41.256519] ? trace_hardirqs_off_thunk+0x1a/0x1c |
| [ 41.261347] entry_SYSCALL_64_after_hwframe+0x26/0x9b |
