Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.776121][ T8518] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1375 [ 68.785858][ T8518] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 8518, name: syz-executor608 [ 68.796353][ T8518] 1 lock held by syz-executor608/8518: [ 68.802151][ T8518] #0: ffffffff8b374160 (rcu_read_lock){....}-{1:2}, at: kernel_migrate_pages+0xed/0x6d0 [ 68.812133][ T8518] Preemption disabled at: [ 68.812144][ T8518] [] pipe_write+0xf85/0x1ac0 [ 68.822950][ T8518] CPU: 0 PID: 8518 Comm: syz-executor608 Not tainted 5.11.0-rc3-next-20210114-syzkaller #0 [ 68.833151][ T8518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.843295][ T8518] Call Trace: [ 68.846583][ T8518] dump_stack+0x107/0x163 [ 68.850920][ T8518] ? pipe_write+0xf85/0x1ac0 [ 68.855515][ T8518] ___might_sleep.cold+0x1f1/0x237 [ 68.860640][ T8518] down_read_killable+0x77/0x480 [ 68.865620][ T8518] ? lock_release+0x710/0x710 [ 68.870304][ T8518] ? down_read+0x440/0x440 [ 68.874715][ T8518] ? memset+0x20/0x40 [ 68.878711][ T8518] mm_access+0x48/0x150 [ 68.882861][ T8518] kernel_migrate_pages+0x1f8/0x6d0 [ 68.888050][ T8518] ? do_migrate_pages+0x420/0x420 [ 68.893070][ T8518] __x64_sys_migrate_pages+0x93/0xf0 [ 68.898362][ T8518] ? syscall_enter_from_user_mode+0x1d/0x50 [ 68.904264][ T8518] do_syscall_64+0x2d/0x70 [ 68.908704][ T8518] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 68.914586][ T8518] RIP: 0033:0x4401d9 [ 68.918466][ T8518] 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 [ 68.938060][ T8518] RSP: 002b:00007fff1caf8538 EFLAGS: 00000246 ORIG_RAX: 0000000000000100 [ 68.946555][ T8518] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 68.954508][ T8518] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000 [ 68.962484][ T8518] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 68.970630][ T8518] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004019e0 [ 68.978626][ T8518] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 68.988822][ T8518] [ 68.991173][ T8518] ============================= [ 68.996098][ T8518] [ BUG: Invalid wait context ] [ 69.000940][ T8518] 5.11.0-rc3-next-20210114-syzkaller #0 Tainted: G W [ 69.008910][ T8518] ----------------------------- [ 69.013733][ T8518] syz-executor608/8518 is trying to lock: [ 69.019427][ T8518] ffff88801146c6d8 (&sig->exec_update_lock){++++}-{3:3}, at: mm_access+0x48/0x150 [ 69.028624][ T8518] other info that might help us debug this: [ 69.034486][ T8518] context-{4:4} [ 69.038023][ T8518] 1 lock held by syz-executor608/8518: [ 69.043569][ T8518] #0: ffffffff8b374160 (rcu_read_lock){....}-{1:2}, at: kernel_migrate_pages+0xed/0x6d0 [ 69.053396][ T8518] stack backtrace: [ 69.057094][ T8518] CPU: 0 PID: 8518 Comm: syz-executor608 Tainted: G W 5.11.0-rc3-next-20210114-syzkaller #0 [ 69.068441][ T8518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.078478][ T8518] Call Trace: [ 69.081740][ T8518] dump_stack+0x107/0x163 [ 69.086059][ T8518] __lock_acquire.cold+0x304/0x39e [ 69.091174][ T8518] ? io_schedule_timeout+0x140/0x140 [ 69.096536][ T8518] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 69.102499][ T8518] ? preempt_schedule_irq+0x82/0x90 [ 69.107683][ T8518] lock_acquire+0x1a8/0x720 [ 69.112174][ T8518] ? mm_access+0x48/0x150 [ 69.116499][ T8518] ? lock_release+0x710/0x710 [ 69.121172][ T8518] ? dump_stack+0x157/0x163 [ 69.125773][ T8518] ? dump_stack+0x15a/0x163 [ 69.130378][ T8518] down_read_killable+0x98/0x480 [ 69.135311][ T8518] ? mm_access+0x48/0x150 [ 69.139648][ T8518] ? lock_release+0x710/0x710 [ 69.144594][ T8518] ? down_read+0x440/0x440 [ 69.148997][ T8518] ? memset+0x20/0x40 [ 69.152976][ T8518] mm_access+0x48/0x150 [ 69.157121][ T8518] kernel_migrate_pages+0x1f8/0x6d0 [ 69.162655][ T8518] ? do_migrate_pages+0x420/0x420 [ 69.167761][ T8518] __x64_sys_migrate_pages+0x93/0xf0 [ 69.173033][ T8518] ? syscall_enter_from_user_mode+0x1d/0x50 [ 69.179005][ T8518] do_syscall_64+0x2d/0x70 [ 69.183502][ T8518] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.189386][ T8518] RIP: 0033:0x4401d9 [ 69.193437][ T8518] 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 [ 69.213177][ T8518] RSP: 002b:00007fff1caf8538 EFLAGS: 00000246 ORIG_RAX: 0000000000000100 [ 69.221587][ T8518] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000