Warning: Permanently added '10.128.0.108' (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 syzkaller login: [ 33.902031] ================================================================== [ 33.909488] BUG: KASAN: use-after-free in __lock_acquire+0x2c57/0x3f20 [ 33.916150] Read of size 8 at addr ffff8880afa7bca0 by task kworker/u4:4/2887 [ 33.923412] [ 33.925063] CPU: 1 PID: 2887 Comm: kworker/u4:4 Not tainted 4.14.209-syzkaller #0 [ 33.933543] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.942897] Workqueue: tipc_rcv tipc_recv_work [ 33.947478] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.950066] dump_stack+0x1b2/0x283 [ 33.953723] print_address_description.cold+0x54/0x1d3 [ 33.959001] kasan_report_error.cold+0x8a/0x194 [ 33.963669] ? __lock_acquire+0x2c57/0x3f20 [ 33.967991] __asan_report_load8_noabort+0x68/0x70 [ 33.973021] ? tipc_subscrb_rcv_cb+0x2c0/0xa40 [ 33.977602] ? __lock_acquire+0x2c57/0x3f20 [ 33.982094] __lock_acquire+0x2c57/0x3f20 [ 33.986250] ? io_schedule_timeout+0x140/0x140 [ 33.991090] ? __wake_up_common_lock+0xcd/0x140 [ 33.995761] ? trace_hardirqs_on+0x10/0x10 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.001043] ? trace_hardirqs_on+0x10/0x10 [ 34.005277] ? preempt_schedule_common+0x45/0xc0 [ 34.010044] ? ___preempt_schedule+0x16/0x18 [ 34.015498] ? tipc_recvmsg+0x43e/0x9e0 [ 34.019473] ? __local_bh_enable_ip+0x132/0x170 [ 34.024141] lock_acquire+0x170/0x3f0 [ 34.027943] ? tipc_subscrb_rcv_cb+0x4d4/0xa40 [ 34.032614] _raw_spin_lock_bh+0x2f/0x40 [ 34.036674] ? tipc_subscrb_rcv_cb+0x4d4/0xa40 [ 34.041344] tipc_subscrb_rcv_cb+0x4d4/0xa40 [ 34.045932] tipc_receive_from_sock+0x25c/0x450 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.050610] ? trace_hardirqs_on+0x10/0x10 [ 34.055018] ? lock_acquire+0x170/0x3f0 [ 34.058987] ? tipc_close_conn+0x200/0x200 [ 34.063317] tipc_recv_work+0x75/0xd0 [ 34.067123] process_one_work+0x793/0x14a0 [ 34.071359] ? work_busy+0x320/0x320 [ 34.075106] ? worker_thread+0x158/0xff0 [ 34.079168] ? _raw_spin_unlock_irq+0x24/0x80 [ 34.083749] worker_thread+0x5cc/0xff0 [ 34.087640] ? rescuer_thread+0xc80/0xc80 [ 34.092055] kthread+0x30d/0x420 [ 34.095426] ? kthread_create_on_node+0xd0/0xd0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.100097] ret_from_fork+0x24/0x30 [ 34.103802] [ 34.105422] Allocated by task 2887: [ 34.109046] kasan_kmalloc+0xeb/0x160 [ 34.112847] kmem_cache_alloc_trace+0x131/0x3d0 [ 34.117516] tipc_subscrb_connect_cb+0x40/0x150 [ 34.122181] tipc_accept_from_sock+0x25b/0x400 [ 34.126757] tipc_recv_work+0x75/0xd0 [ 34.130565] process_one_work+0x793/0x14a0 [ 34.134802] worker_thread+0x5cc/0xff0 [ 34.138686] kthread+0x30d/0x420 [ 34.142048] ret_from_fork+0x24/0x30 [ 34.145891] [ 34.147511] Freed by task 22: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.150639] kasan_slab_free+0xc3/0x1a0 [ 34.154699] kfree+0xc9/0x250 [ 34.157809] tipc_subscrb_put+0x22/0x30 [ 34.161879] tipc_close_conn+0x16a/0x200 [ 34.165949] tipc_send_work+0x41e/0x520 [ 34.169926] process_one_work+0x793/0x14a0 [ 34.174502] worker_thread+0x5cc/0xff0 [ 34.178385] kthread+0x30d/0x420 [ 34.181751] ret_from_fork+0x24/0x30 [ 34.185454] [ 34.187511] The buggy address belongs to the object at ffff8880afa7bc80 [ 34.187511] which belongs to the cache kmalloc-96 of size 96 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.199998] The buggy address is located 32 bytes inside of [ 34.199998] 96-byte region [ffff8880afa7bc80, ffff8880afa7bce0) [ 34.211693] The buggy address belongs to the page: [ 34.216625] page:ffffea0002be9ec0 count:1 mapcount:0 mapping:ffff8880afa7b000 index:0xffff8880afa7bb00 [ 34.226096] flags: 0xfff00000000100(slab) [ 34.230243] raw: 00fff00000000100 ffff8880afa7b000 ffff8880afa7bb00 0000000100000013 [ 34.238216] raw: ffffea0002a30e60 ffffea0002ab9d20 ffff88813fe804c0 0000000000000000 [ 34.246264] page dumped because: kasan: bad access detected [ 34.251964] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.253593] Memory state around the buggy address: [ 34.258517] ffff8880afa7bb80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.266049] ffff8880afa7bc00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.273503] >ffff8880afa7bc80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.281076] ^ [ 34.285481] ffff8880afa7bd00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.293055] ffff8880afa7bd80: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.300408] ================================================================== [ 34.307758] Disabling lock debugging due to kernel taint [ 34.313289] Kernel panic - not syncing: panic_on_warn set ... [ 34.313289] [ 34.320675] CPU: 1 PID: 2887 Comm: kworker/u4:4 Tainted: G B 4.14.209-syzkaller #0 [ 34.330459] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.339816] Workqueue: tipc_rcv tipc_recv_work [ 34.344403] Call Trace: [ 34.347013] dump_stack+0x1b2/0x283 [ 34.350656] panic+0x1f9/0x42d executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.353853] ? add_taint.cold+0x16/0x16 [ 34.358004] ? lock_downgrade+0x740/0x740 [ 34.362155] kasan_end_report+0x43/0x49 [ 34.366129] kasan_report_error.cold+0xa7/0x194 [ 34.370802] ? __lock_acquire+0x2c57/0x3f20 [ 34.375210] __asan_report_load8_noabort+0x68/0x70 [ 34.380166] ? tipc_subscrb_rcv_cb+0x2c0/0xa40 [ 34.384836] ? __lock_acquire+0x2c57/0x3f20 [ 34.389158] __lock_acquire+0x2c57/0x3f20 [ 34.393310] ? io_schedule_timeout+0x140/0x140 [ 34.397891] ? __wake_up_common_lock+0xcd/0x140 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.402556] ? trace_hardirqs_on+0x10/0x10 [ 34.406788] ? trace_hardirqs_on+0x10/0x10 [ 34.411019] ? preempt_schedule_common+0x45/0xc0 [ 34.415950] ? ___preempt_schedule+0x16/0x18 [ 34.420371] ? tipc_recvmsg+0x43e/0x9e0 [ 34.424347] ? __local_bh_enable_ip+0x132/0x170 [ 34.429022] lock_acquire+0x170/0x3f0 [ 34.432829] ? tipc_subscrb_rcv_cb+0x4d4/0xa40 [ 34.437447] _raw_spin_lock_bh+0x2f/0x40 [ 34.441526] ? tipc_subscrb_rcv_cb+0x4d4/0xa40 [ 34.446113] tipc_subscrb_rcv_cb+0x4d4/0xa40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.450527] tipc_receive_from_sock+0x25c/0x450 [ 34.455202] ? trace_hardirqs_on+0x10/0x10 [ 34.459437] ? lock_acquire+0x170/0x3f0 [ 34.463813] ? tipc_close_conn+0x200/0x200 [ 34.468051] tipc_recv_work+0x75/0xd0 [ 34.471853] process_one_work+0x793/0x14a0 [ 34.476090] ? work_busy+0x320/0x320 [ 34.479931] ? worker_thread+0x158/0xff0 [ 34.484356] ? _raw_spin_unlock_irq+0x24/0x80 [ 34.492762] worker_thread+0x5cc/0xff0 [ 34.496939] ? rescuer_thread+0xc80/0xc80 [ 34.501130] kthread+0x30d/0x420 executing program executing program executing program [ 34.504496] ? kthread_create_on_node+0xd0/0xd0 [ 34.509176] ret_from_fork+0x24/0x30 [ 34.513939] Kernel Offset: disabled [ 34.518023] Rebooting in 86400 seconds..