BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1372 BUG: unable to handle kernel paging request at ffff8801fb01d000 IP: rcu_cblist_dequeue+0x11/0x30 kernel/rcu/rcu_segcblist.c:53 PGD 404e067 P4D 404e067 PUD 1fd1ef063 PMD 1fc7e4063 PTE 0 Oops: 0000 [#1] SMP Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 4026 Comm: syz-executor2 Not tainted 4.15.0-rc3-next-20171214+ #67 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_cblist_dequeue+0x11/0x30 kernel/rcu/rcu_segcblist.c:53 RSP: 0018:ffff88021fd03ee0 EFLAGS: 00010297 RAX: ffff8801fb01d000 RBX: ffff88021fd24780 RCX: 0000000000000000 RDX: ffff8801fcc1a000 RSI: 0000000000000000 RDI: ffff88021fd03f00 RBP: ffff88021fd03ee0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83081e00 R13: ffff88021fd247b8 R14: 0000000000000286 R15: ffffffff8304f960 FS: 00007f51c268c700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8801fb01d000 CR3: 0000000208c9c004 CR4: 00000000001606e0 Call Trace: rcu_do_batch kernel/rcu/tree.c:2672 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2934 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2901 [inline] rcu_process_callbacks+0x2f1/0x7e0 kernel/rcu/tree.c:2918 __do_softirq+0xcb/0x4f3 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0xd4/0xe0 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:540 [inline] smp_apic_timer_interrupt+0x8e/0x2a0 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:920 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:65 RSP: 0018:ffffc90000e83c58 EFLAGS: 00010286 ORIG_RAX: ffffffffffffff11 RAX: 0000000000000000 RBX: ffffffff830e4f70 RCX: 00000000ffe1d438 RDX: 00000000ffffff3b RSI: 0000000000000000 RDI: ffff8801fc8fe4c0 RBP: ffffc90000e83c90 R08: 000000000002c0c8 R09: ffff8801fc71b9bd R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801fc71b820 R13: ffff8801fc71b810 R14: 0000000000000000 R15: ffff8801fc71b8f8 Code: e5 48 c7 47 18 00 00 00 00 5d c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 8b 07 55 48 89 e5 48 85 c0 74 10 48 83 6f 10 01 <48> 8b 10 48 85 d2 48 89 17 74 02 5d c3 48 89 7f 08 5d c3 66 90 RIP: rcu_cblist_dequeue+0x11/0x30 kernel/rcu/rcu_segcblist.c:53 RSP: ffff88021fd03ee0 CR2: ffff8801fb01d000 ---[ end trace 656f19ef9edb7c86 ]--- Kernel panic - not syncing: Fatal exception in interrupt in_atomic(): 0, irqs_disabled(): 1, pid: 4041, name: syz-executor4 INFO: lockdep is turned off. irq event stamp: 92 hardirqs last enabled at (91): [<00000000cd07bf49>] slab_alloc mm/slab.c:3379 [inline] hardirqs last enabled at (91): [<00000000cd07bf49>] kmem_cache_alloc+0x1f8/0x720 mm/slab.c:3546 hardirqs last disabled at (92): [<00000000b7817757>] __raw_spin_lock_init+0x1c/0x50 kernel/locking/spinlock_debug.c:23 softirqs last enabled at (0): [<0000000094a46a7f>] copy_process.part.35+0x53f/0x2240 kernel/fork.c:1725 softirqs last disabled at (0): [< (null)>] (null) CPU: 0 PID: 4041 Comm: syz-executor4 Tainted: G D 4.15.0-rc3-next-20171214+ #67 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xe9/0x14b lib/dump_stack.c:53 ___might_sleep+0x142/0x260 kernel/sched/core.c:6061 __might_sleep+0x45/0x80 kernel/sched/core.c:6014 __do_page_fault+0x1f2/0x6b0 arch/x86/mm/fault.c:1372 do_page_fault+0x52/0x330 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010: (null) RSP: 0018:ffffc90000eef930 EFLAGS: 00010046 RAX: 0000000000000001 RBX: ffff8801fefc0580 RCX: 0000000000000003 RDX: 0000000000000e3d RSI: ffff8801fefc0df0 RDI: ffff8801fefc0580 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 BUG: unable to handle kernel paging request at ffff8801fb0a5000 IP: lookup_address_in_pgd+0x27/0x280 arch/x86/mm/pageattr.c:360 BAD Oops: 0000 [#2] SMP Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4041 Comm: syz-executor4 Tainted: G D W 4.15.0-rc3-next-20171214+ #67 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_address_in_pgd+0x27/0x280 arch/x86/mm/pageattr.c:360 RSP: 0018:ffffc90000eef6a0 EFLAGS: 00010046 RAX: 0000000000010000 RBX: ffff8801fb0a5000 RCX: ffffffff8111098f RDX: 0000000000010000 RSI: ffffc90001a81000 RDI: ffff8801fb0a5000 RBP: ffffc90000eef6d8 R08: ffffffff825abc30 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8801fefc0580 R12: ffffc90000eef70c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f5850244700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8801fb0a5880 CR3: 00000001fb0a5003 CR4: 00000000001606f0 Call Trace: show_fault_oops arch/x86/mm/fault.c:688 [inline] no_context+0x3ad/0x4c0 arch/x86/mm/fault.c:830 __bad_area_nosemaphore+0x144/0x270 arch/x86/mm/fault.c:931 __bad_area arch/x86/mm/fault.c:957 [inline] bad_area+0x49/0x50 arch/x86/mm/fault.c:964 __do_page_fault+0x4bf/0x6b0 arch/x86/mm/fault.c:1399 do_page_fault+0x52/0x330 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010: (null) RSP: 0018:ffffc90000eef930 EFLAGS: 00010046 RAX: 0000000000000001 RBX: ffff8801fefc0580 RCX: 0000000000000003 RDX: 0000000000000e3d RSI: ffff8801fefc0df0 RDI: ffff8801fefc0580 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 d4 53 48 89 fb 49 89 f5 48 83 ec 10 e8 b1 99 1a 00 41 c7 04 24 00 00 00 00 <48> f7 03 9f ff ff ff 0f 84 25 02 00 00 e8 97 99 1a 00 41 c7 04 RIP: lookup_address_in_pgd+0x27/0x280 arch/x86/mm/pageattr.c:360 RSP: ffffc90000eef6a0 CR2: ffff8801fb0a5000 ---[ end trace 656f19ef9edb7c87 ]---