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WARNING: suspicious RCU usage in 4 (2)

Status: auto-closed as invalid on 2020/10/31 00:33
Reported-by: syzbot+92b6505bd379b3911616@syzkaller.appspotmail.com
First crash: 1525d, last: 1393d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING: suspicious RCU usage in 4 (3) 1 1191d 1191d 0/1 auto-closed as invalid on 2021/05/21 06:13
linux-4.14 WARNING: suspicious RCU usage in 4 3 1723d 1764d 0/1 auto-closed as invalid on 2019/12/05 20:57
android-414 WARNING: suspicious RCU usage in 4 1 1628d 1627d 0/1 auto-closed as invalid on 2020/03/10 17:38

Sample crash report:
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
=============================
CPU: 0 PID: 17600 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
WARNING: suspicious RCU usage
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+0x1b2/0x283 lib/dump_stack.c:58
4.14.184-syzkaller #0 Not tainted
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
-----------------------------
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage!
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780

other info that might help us debug this:

 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546

rcu_scheduler_active = 2, debug_locks = 1
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
2 locks held by syz-executor.1/17615:
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
 #0: 
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
 (cb_lock){++++}, at: [<ffffffff851db095>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
 #1:  (genl_mutex){+.+.}, at: [<ffffffff851dbd02>] genl_lock net/netlink/genetlink.c:33 [inline]
 #1:  (genl_mutex){+.+.}, at: [<ffffffff851dbd02>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623

stack backtrace:
CPU: 1 PID: 17615 Comm: syz-executor.1 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 tipc_bearer_find+0x1ff/0x2f0 net/tipc/bearer.c:177
 tipc_nl_compat_link_set+0x40b/0xb80 net/tipc/netlink_compat.c:797
 __tipc_nl_compat_doit net/tipc/netlink_compat.c:306 [inline]
 tipc_nl_compat_doit+0x18d/0x510 net/tipc/netlink_compat.c:354
 tipc_nl_compat_handle net/tipc/netlink_compat.c:1205 [inline]
 tipc_nl_compat_recv+0x95c/0xa10 net/tipc/netlink_compat.c:1287
 genl_family_rcv_msg+0x57c/0xb30 net/netlink/genetlink.c:600
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x64a/0xbb0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fa137ccbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000501a60 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a10 R14: 00000000004ccf0a R15: 00007fa137ccc6d4
CPU: 0 PID: 17655 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 17709 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 17778 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 17841 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 17925 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 18009 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 18079 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4
audit: type=1800 audit(1593736375.364:16): pid=18147 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name=8001 dev="sda1" ino=16862 res=0
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 18175 Comm: syz-executor.2 Not tainted 4.14.184-syzkaller #0
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+0x1b2/0x283 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x154 lib/fault-inject.c:149
 should_fail_alloc_page mm/page_alloc.c:2892 [inline]
 prepare_alloc_pages mm/page_alloc.c:4125 [inline]
 __alloc_pages_nodemask+0x22b/0x2730 mm/page_alloc.c:4173
 alloc_pages_current+0xe7/0x1e0 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __get_free_pages+0xb/0x40 mm/page_alloc.c:4227
 mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:974 [inline]
 mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:996
 kvm_mmu_load+0x1e/0xc90 arch/x86/kvm/mmu.c:4780
 kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:7182 [inline]
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x371f/0x58f0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x3df/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cb29
RSP: 002b:00007fd83c174c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8ae0 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00000000000003d2 R14: 00000000004c68e0 R15: 00007fd83c1756d4

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/03 00:32 linux-4.14.y b850307b279c f30c14bf .config console log report ci2-linux-4-14
2020/05/13 17:19 linux-4.14.y ab9dfda23248 9a6d42fb .config console log report ci2-linux-4-14
2020/02/22 00:44 linux-4.14.y 98db2bf27b9e 2ffa6679 .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.