Starting Load/Save RF Kill Switch Status... [[0;32m OK [0m] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.870136][ T6864] ================================================================== [ 62.878792][ T6864] BUG: KASAN: null-ptr-deref in PageHuge+0x19/0x170 [ 62.885361][ T6864] Read of size 8 at addr 0000000000000000 by task syz-executor410/6864 [ 62.893585][ T6864] [ 62.895903][ T6864] CPU: 1 PID: 6864 Comm: syz-executor410 Not tainted 5.9.0-rc5-next-20200915-syzkaller #0 [ 62.905779][ T6864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.915865][ T6864] Call Trace: [ 62.919186][ T6864] dump_stack+0x198/0x1fb [ 62.923499][ T6864] ? PageHuge+0x19/0x170 [ 62.927737][ T6864] ? PageHuge+0x19/0x170 [ 62.931975][ T6864] kasan_report.cold+0x5/0x37 [ 62.936650][ T6864] ? PageHuge+0x19/0x170 [ 62.940878][ T6864] check_memory_region+0x13d/0x180 [ 62.945986][ T6864] PageHuge+0x19/0x170 [ 62.950052][ T6864] find_get_incore_page+0x165/0x2e0 [ 62.955244][ T6864] mincore_page+0x1e/0x310 [ 62.959646][ T6864] __mincore_unmapped_range+0x171/0x2c0 [ 62.965176][ T6864] mincore_pte_range+0x69f/0x980 [ 62.970097][ T6864] ? __do_sys_mincore+0x7a0/0x7a0 [ 62.975105][ T6864] __walk_page_range+0xeed/0x22c0 [ 62.980124][ T6864] ? walk_page_test+0x78/0x180 [ 62.984877][ T6864] walk_page_range+0x20d/0x400 [ 62.989626][ T6864] ? __walk_page_range+0x22c0/0x22c0 [ 62.994899][ T6864] ? vmacache_update+0xce/0x140 [ 62.999749][ T6864] __do_sys_mincore+0x279/0x7a0 [ 63.004954][ T6864] do_syscall_64+0x2d/0x70 [ 63.009357][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.015248][ T6864] RIP: 0033:0x440329 [ 63.019138][ T6864] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.038735][ T6864] RSP: 002b:00007ffe6fca7ae8 EFLAGS: 00000246 ORIG_RAX: 000000000000001b [ 63.047399][ T6864] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440329 [ 63.055378][ T6864] RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020001000 [ 63.063383][ T6864] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 63.071339][ T6864] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000401b30 [ 63.079294][ T6864] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000 [ 63.087279][ T6864] ================================================================== [ 63.095348][ T6864] Disabling lock debugging due to kernel taint [ 63.101665][ T6864] Kernel panic - not syncing: panic_on_warn set ... [ 63.108356][ T6864] CPU: 1 PID: 6864 Comm: syz-executor410 Tainted: G B 5.9.0-rc5-next-20200915-syzkaller #0 [ 63.119624][ T6864] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.129670][ T6864] Call Trace: [ 63.132961][ T6864] dump_stack+0x198/0x1fb [ 63.137289][ T6864] ? hugetlb_register_node+0x1c0/0x270 [ 63.142739][ T6864] panic+0x347/0x7c0 [ 63.146611][ T6864] ? __warn_printk+0xf3/0xf3 [ 63.151199][ T6864] ? PageHuge+0x19/0x170 [ 63.155425][ T6864] ? trace_hardirqs_on+0x51/0x1c0 [ 63.160432][ T6864] ? PageHuge+0x19/0x170 [ 63.164670][ T6864] ? PageHuge+0x19/0x170 [ 63.168891][ T6864] end_report+0x58/0x5e [ 63.173024][ T6864] kasan_report.cold+0xd/0x37 [ 63.177678][ T6864] ? PageHuge+0x19/0x170 [ 63.181930][ T6864] check_memory_region+0x13d/0x180 [ 63.187019][ T6864] PageHuge+0x19/0x170 [ 63.191064][ T6864] find_get_incore_page+0x165/0x2e0 [ 63.196240][ T6864] mincore_page+0x1e/0x310 [ 63.200634][ T6864] __mincore_unmapped_range+0x171/0x2c0 [ 63.206155][ T6864] mincore_pte_range+0x69f/0x980 [ 63.211084][ T6864] ? __do_sys_mincore+0x7a0/0x7a0 [ 63.216098][ T6864] __walk_page_range+0xeed/0x22c0 [ 63.221121][ T6864] ? walk_page_test+0x78/0x180 [ 63.225863][ T6864] walk_page_range+0x20d/0x400 [ 63.230622][ T6864] ? __walk_page_range+0x22c0/0x22c0 [ 63.235910][ T6864] ? vmacache_update+0xce/0x140 [ 63.240753][ T6864] __do_sys_mincore+0x279/0x7a0 [ 63.245601][ T6864] do_syscall_64+0x2d/0x70 [ 63.250011][ T6864] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.255897][ T6864] RIP: 0033:0x440329 [ 63.259796][ T6864] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.279461][ T6864] RSP: 002b:00007ffe6fca7ae8 EFLAGS: 00000246 ORIG_RAX: 000000000000001b [ 63.287865][ T6864] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440329 [ 63.295813][ T6864] RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020001000 [ 63.303781][ T6864] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 63.311742][ T6864] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000401b30 [ 63.319706][ T6864] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000 [ 63.328743][ T6864] Kernel Offset: disabled [ 63.333073][ T6864] Rebooting in 86400 seconds..