Warning: Permanently added '10.128.0.111' (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 [ 46.712206] audit: type=1400 audit(1596694067.875:8): avc: denied { execmem } for pid=6468 comm="syz-executor453" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.793166] ================================================================== [ 46.800698] BUG: KASAN: use-after-free in ex_handler_refcount+0x18f/0x1c0 [ 46.807635] Write of size 4 at addr ffff8880a7a24c18 by task kworker/0:1/14 [ 46.814734] [ 46.816366] CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.137-syzkaller #0 [ 46.823722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.833089] Workqueue: events do_enable_set [ 46.837410] Call Trace: [ 46.840005] dump_stack+0x1fc/0x2fe [ 46.843644] print_address_description.cold+0x54/0x219 [ 46.848928] kasan_report_error.cold+0x8a/0x1c7 [ 46.853609] ? ex_handler_refcount+0x18f/0x1c0 [ 46.858195] __asan_report_store4_noabort+0x88/0x90 [ 46.863236] ? ex_handler_refcount+0x18f/0x1c0 [ 46.867842] ex_handler_refcount+0x18f/0x1c0 [ 46.872258] ? ex_handler_clear_fs+0xb0/0xb0 [ 46.876713] fixup_exception+0x8a/0xc3 [ 46.880608] do_trap+0x61/0x250 [ 46.883900] do_error_trap+0x15d/0x310 [ 46.887795] ? math_error+0x310/0x310 [ 46.891613] ? csum_partial_copy_generic+0x607f/0x7811 [ 46.896910] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.901770] invalid_op+0x14/0x20 [ 46.905232] RIP: 0010:csum_partial_copy_generic+0x607f/0x7811 [ 46.911131] Code: 49 8d 8c 24 80 00 00 00 0f 0b 48 8d 8d 80 00 00 00 0f 0b 48 8d 8d 80 00 00 00 0f 0b 49 8d 8c 24 b8 02 00 00 0f 0b 48 8d 4d 18 <0f> 0b 48 8d 8d b8 02 00 00 0f 0b 48 8d 4b 18 0f 0b 48 8d 8d 80 00 [ 46.930065] RSP: 0018:ffff8880a9f47c20 EFLAGS: 00010297 [ 46.935433] RAX: ffff8880a9f38380 RBX: 0000000000000001 RCX: ffff8880a7a24c18 [ 46.942701] RDX: 0000000000000000 RSI: ffffffff868150d0 RDI: ffff8880a7a24c00 [ 46.949991] RBP: ffff8880a7a24c00 R08: 0000000000000000 R09: 0000000000000008 [ 46.957254] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ae62bb10 [ 46.964522] R13: ffff8880a9e59800 R14: ffff8880ae62bac0 R15: ffff8880950bf500 [ 46.971808] ? l2cap_chan_put+0x10/0x1c0 [ 46.975877] do_enable_set+0x4ef/0x975 [ 46.979780] ? process_one_work+0x77b/0x1570 [ 46.984187] ? chan_recv_cb+0xa70/0xa70 [ 46.988164] ? check_preemption_disabled+0x41/0x280 [ 46.993185] process_one_work+0x864/0x1570 [ 46.997429] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 47.002127] worker_thread+0x64c/0x1130 [ 47.006106] ? __kthread_parkme+0xfd/0x1b0 [ 47.010335] ? process_one_work+0x1570/0x1570 [ 47.014833] kthread+0x30b/0x410 [ 47.018199] ? kthread_park+0x180/0x180 [ 47.022172] ret_from_fork+0x24/0x30 [ 47.025883] [ 47.027501] Allocated by task 14: [ 47.030964] kmem_cache_alloc_trace+0x12f/0x380 [ 47.035627] l2cap_chan_create+0x40/0x380 [ 47.039767] do_enable_set+0x525/0x975 [ 47.043643] process_one_work+0x864/0x1570 [ 47.047890] worker_thread+0x64c/0x1130 [ 47.051862] kthread+0x30b/0x410 [ 47.055222] ret_from_fork+0x24/0x30 [ 47.058923] [ 47.060542] Freed by task 19: [ 47.063646] kfree+0xcc/0x210 [ 47.066743] l2cap_chan_put+0x16b/0x1c0 [ 47.070711] do_enable_set+0x4ef/0x975 [ 47.074590] process_one_work+0x864/0x1570 [ 47.078834] worker_thread+0x64c/0x1130 [ 47.082808] kthread+0x30b/0x410 [ 47.086192] ret_from_fork+0x24/0x30 [ 47.089891] [ 47.091519] The buggy address belongs to the object at ffff8880a7a24c00 [ 47.091519] which belongs to the cache kmalloc-2048 of size 2048 [ 47.104358] The buggy address is located 24 bytes inside of [ 47.104358] 2048-byte region [ffff8880a7a24c00, ffff8880a7a25400) [ 47.116245] The buggy address belongs to the page: [ 47.121172] page:ffffea00029e8900 count:1 mapcount:0 mapping:ffff88812c39cc40 index:0x0 compound_mapcount: 0 [ 47.131136] flags: 0xfffe0000008100(slab|head) [ 47.135717] raw: 00fffe0000008100 ffffea00022cf188 ffffea0002a1d408 ffff88812c39cc40 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.143593] raw: 0000000000000000 ffff8880a7a24380 0000000100000003 0000000000000000 [ 47.151463] page dumped because: kasan: bad access detected [ 47.157159] [ 47.158773] Memory state around the buggy address: [ 47.163693] ffff8880a7a24b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.171047] ffff8880a7a24b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.178400] >ffff8880a7a24c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.185774] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.189924] ffff8880a7a24c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.197287] ffff8880a7a24d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.204635] ================================================================== [ 47.212504] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.709006] Kernel panic - not syncing: panic_on_warn set ... [ 47.709006] [ 47.716416] CPU: 0 PID: 14 Comm: kworker/0:1 Tainted: G B 4.19.137-syzkaller #0 [ 47.725167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.734536] Workqueue: events do_enable_set [ 47.738857] Call Trace: [ 47.741459] dump_stack+0x1fc/0x2fe [ 47.745113] panic+0x26a/0x50e [ 47.748333] ? __warn_printk+0xf3/0xf3 [ 47.752229] ? preempt_schedule_common+0x45/0xc0 [ 47.756994] ? ___preempt_schedule+0x16/0x18 [ 47.761404] ? trace_hardirqs_on+0x55/0x210 [ 47.765731] kasan_end_report+0x43/0x49 [ 47.769708] kasan_report_error.cold+0xa7/0x1c7 [ 47.774380] ? ex_handler_refcount+0x18f/0x1c0 [ 47.778965] __asan_report_store4_noabort+0x88/0x90 [ 47.783990] ? ex_handler_refcount+0x18f/0x1c0 [ 47.788579] ex_handler_refcount+0x18f/0x1c0 [ 47.792990] ? ex_handler_clear_fs+0xb0/0xb0 [ 47.797409] fixup_exception+0x8a/0xc3 [ 47.801308] do_trap+0x61/0x250 [ 47.804594] do_error_trap+0x15d/0x310 [ 47.808485] ? math_error+0x310/0x310 [ 47.812292] ? csum_partial_copy_generic+0x607f/0x7811 [ 47.817582] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.822431] invalid_op+0x14/0x20 [ 47.825890] RIP: 0010:csum_partial_copy_generic+0x607f/0x7811 [ 47.831778] Code: 49 8d 8c 24 80 00 00 00 0f 0b 48 8d 8d 80 00 00 00 0f 0b 48 8d 8d 80 00 00 00 0f 0b 49 8d 8c 24 b8 02 00 00 0f 0b 48 8d 4d 18 <0f> 0b 48 8d 8d b8 02 00 00 0f 0b 48 8d 4b 18 0f 0b 48 8d 8d 80 00 [ 47.850681] RSP: 0018:ffff8880a9f47c20 EFLAGS: 00010297 [ 47.856130] RAX: ffff8880a9f38380 RBX: 0000000000000001 RCX: ffff8880a7a24c18 [ 47.863397] RDX: 0000000000000000 RSI: ffffffff868150d0 RDI: ffff8880a7a24c00 [ 47.870663] RBP: ffff8880a7a24c00 R08: 0000000000000000 R09: 0000000000000008 [ 47.877970] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ae62bb10 [ 47.885239] R13: ffff8880a9e59800 R14: ffff8880ae62bac0 R15: ffff8880950bf500 [ 47.892533] ? l2cap_chan_put+0x10/0x1c0 [ 47.903031] do_enable_set+0x4ef/0x975 [ 47.906914] ? process_one_work+0x77b/0x1570 [ 47.911328] ? chan_recv_cb+0xa70/0xa70 [ 47.915302] ? check_preemption_disabled+0x41/0x280 [ 47.920318] process_one_work+0x864/0x1570 [ 47.924552] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 47.929216] worker_thread+0x64c/0x1130 [ 47.933188] ? __kthread_parkme+0xfd/0x1b0 [ 47.937418] ? process_one_work+0x1570/0x1570 [ 47.941909] kthread+0x30b/0x410 [ 47.945268] ? kthread_park+0x180/0x180 [ 47.949243] ret_from_fork+0x24/0x30 [ 47.953907] Kernel Offset: disabled [ 47.957523] Rebooting in 86400 seconds..