syzbot


WARNING: suspicious RCU usage in kvm_mmu_create

Status: auto-closed as invalid on 2021/07/13 09:46
Reported-by: syzbot+c5f62ca3dd1445730af8@syzkaller.appspotmail.com
First crash: 471d, last: 471d

Sample crash report:
=============================
WARNING: suspicious RCU usage
syz-executor.3: page allocation failure: order:0, mode:0x14000c4(GFP_KERNEL|GFP_DMA32), nodemask=(null)
4.14.225-syzkaller #0 Not tainted
-----------------------------
net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage!
syz-executor.3 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 13619 Comm: syz-executor.3 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline]
 __alloc_pages_nodemask+0x2127/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 alloc_mmu_pages arch/x86/kvm/mmu.c:5173 [inline]
 kvm_mmu_create+0xda/0x1d0 arch/x86/kvm/mmu.c:5191
 kvm_arch_vcpu_init+0x282/0x890 arch/x86/kvm/x86.c:8291
 kvm_vcpu_init+0x26d/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:321
 vmx_create_vcpu+0xef/0x29d0 arch/x86/kvm/vmx.c:10042
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2549 [inline]
 kvm_vm_ioctl+0x4ca/0x13e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3057
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 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: 0033:0x465f69
RSP: 002b:00007fb7e81e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdf5aeb5cf R14: 00007fb7e81e9300 R15: 0000000000022000

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
2 locks held by syz-executor.2/13617:
 #0:  (cb_lock){++++}, at: [<ffffffff85e12ba5>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
 #1:  (genl_mutex){+.+.}, at: [<ffffffff85e13802>] genl_lock net/netlink/genetlink.c:33 [inline]
 #1:  (genl_mutex){+.+.}, at: [<ffffffff85e13802>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623

stack backtrace:
CPU: 1 PID: 13617 Comm: syz-executor.2 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 tipc_bearer_find+0x1ff/0x2f0 net/tipc/bearer.c:177
 tipc_nl_compat_link_set+0x40b/0xb90 net/tipc/netlink_compat.c:807
 __tipc_nl_compat_doit net/tipc/netlink_compat.c:316 [inline]
 tipc_nl_compat_doit+0x192/0x5d0 net/tipc/netlink_compat.c:364
 tipc_nl_compat_handle net/tipc/netlink_compat.c:1215 [inline]
 tipc_nl_compat_recv+0xa0b/0xae0 net/tipc/netlink_compat.c:1297
 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 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+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 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: 0033:0x465f69
RSP: 002b:00007f38ca5f5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000003
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffcb4518c5f R14: 00007f38ca5f5300 R15: 0000000000022000
Mem-Info:
active_anon:449403 inactive_anon:15147 isolated_anon:0
 active_file:4956 inactive_file:45480 isolated_file:0
 unevictable:0 dirty:239 writeback:0 unstable:0
 slab_reclaimable:49309 slab_unreclaimable:382987
 mapped:64252 shmem:16006 pagetables:70859 bounce:0
 free:499818 free_pcp:585 free_cma:0
Node 0 active_anon:1438932kB inactive_anon:22104kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:216736kB dirty:0kB writeback:0kB shmem:22408kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 794624kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:358680kB inactive_anon:38484kB active_file:19824kB inactive_file:181916kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:40272kB dirty:956kB writeback:0kB shmem:41616kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 0 DMA free:10972kB min:204kB low:252kB high:300kB active_anon:4216kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:32kB pagetables:76kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2717 2718 2718 2718
Node 0 DMA32 free:36044kB min:36200kB low:45248kB high:54296kB active_anon:1434716kB inactive_anon:22104kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:3129332kB managed:2788160kB mlocked:0kB kernel_stack:28960kB pagetables:59592kB bounce:0kB free_pcp:988kB local_pcp:588kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:1955424kB min:53696kB low:67120kB high:80544kB active_anon:358520kB inactive_anon:38484kB active_file:19840kB inactive_file:181920kB unevictable:0kB writepending:1056kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:125216kB pagetables:223632kB bounce:0kB free_pcp:1388kB local_pcp:652kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 1*4kB (U) 3*8kB (UME) 0*16kB 2*32kB (UE) 2*64kB (UE) 4*128kB (UME) 2*256kB (ME) 3*512kB (UME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10972kB
Node 0 DMA32: 491*4kB (UMH) 182*8kB (UMH) 249*16kB (MEH) 351*32kB (UME) 146*64kB (UMEH) 45*128kB (UMEH) 7*256kB (UMH) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 36044kB
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
Node 1 Normal: 468*4kB (UME) 107*8kB (ME) 36*16kB (ME) 112*32kB (UME) 6*64kB (UME) 30*128kB (UM) 64*256kB (U) 43*512kB (UM) 18*1024kB (UE) 5*2048kB (UME) 458*4096kB (M) = 1954152kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
29864 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
2097051 pages RAM
0 pages HighMem/MovableOnly
363840 pages reserved
0 pages cma reserved
syz-executor.3: page allocation failure: order:0, mode:0x14000c4(GFP_KERNEL|GFP_DMA32), nodemask=(null)
syz-executor.3 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 13685 Comm: syz-executor.3 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline]
 __alloc_pages_nodemask+0x2127/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 alloc_mmu_pages arch/x86/kvm/mmu.c:5173 [inline]
 kvm_mmu_create+0xda/0x1d0 arch/x86/kvm/mmu.c:5191
 kvm_arch_vcpu_init+0x282/0x890 arch/x86/kvm/x86.c:8291
 kvm_vcpu_init+0x26d/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:321
 vmx_create_vcpu+0xef/0x29d0 arch/x86/kvm/vmx.c:10042
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2549 [inline]
 kvm_vm_ioctl+0x4ca/0x13e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3057
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 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: 0033:0x465f69
RSP: 002b:00007fb7e81e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdf5aeb5cf R14: 00007fb7e81e9300 R15: 0000000000022000
F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop1): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop1): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop1): Can't find valid F2FS filesystem in 1th superblock
Mem-Info:
active_anon:449508 inactive_anon:15227 isolated_anon:0
 active_file:4970 inactive_file:45700 isolated_file:0
 unevictable:0 dirty:275 writeback:0 unstable:0
 slab_reclaimable:49291 slab_unreclaimable:382594
 mapped:64321 shmem:16089 pagetables:70889 bounce:0
 free:499961 free_pcp:431 free_cma:0
Node 0 active_anon:1438932kB inactive_anon:22104kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:216736kB dirty:0kB writeback:0kB shmem:22408kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 794624kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:359200kB inactive_anon:38504kB active_file:19876kB inactive_file:182100kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:40548kB dirty:1100kB writeback:0kB shmem:41948kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 0 DMA free:10972kB min:204kB low:252kB high:300kB active_anon:4216kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:32kB pagetables:76kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2717 2718 2718 2718
Node 0 DMA32 free:36020kB min:36200kB low:45248kB high:54296kB active_anon:1434716kB inactive_anon:22104kB active_file:4kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2788160kB mlocked:0kB kernel_stack:28960kB pagetables:59592kB bounce:0kB free_pcp:1028kB local_pcp:596kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:1954152kB min:53696kB low:67120kB high:80544kB active_anon:359100kB inactive_anon:38504kB active_file:19876kB inactive_file:182100kB unevictable:0kB writepending:1100kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:125248kB pagetables:223888kB bounce:0kB free_pcp:1064kB local_pcp:544kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 1*4kB (U) 3*8kB (UME) 0*16kB 2*32kB (UE) 2*64kB (UE) 4*128kB (UME) 2*256kB (ME) 3*512kB (UME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10972kB
Node 0 DMA32: 491*4kB (UMH) 181*8kB (UM) 248*16kB (ME) 351*32kB (UME) 146*64kB (UMEH) 45*128kB (UMEH) 7*256kB (UMH) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 36020kB
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
Node 1 Normal: 345*4kB (UME) 132*8kB (UME) 72*16kB (UME) 59*32kB (UME) 75*64kB (UME) 15*128kB (UM) 65*256kB (U) 43*512kB (UM) 18*1024kB (UE) 5*2048kB (UME) 458*4096kB (M) = 1955492kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
29895 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
2097051 pages RAM
0 pages HighMem/MovableOnly
363840 pages reserved
0 pages cma reserved
ALSA: mixer_oss: invalid OSS volume ''
binder: 13750:13761 unknown command 0
ALSA: mixer_oss: invalid OSS volume ''
binder: 13750:13761 ioctl c0306201 200001c0 returned -22
syz-executor.3: page allocation failure: order:0, mode:0x14000c4(GFP_KERNEL|GFP_DMA32), nodemask=(null)
binder: 13750:13777 unknown command 0
binder: 13750:13777 ioctl c0306201 200001c0 returned -22
syz-executor.3 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 13765 Comm: syz-executor.3 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline]
 __alloc_pages_nodemask+0x2127/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 alloc_mmu_pages arch/x86/kvm/mmu.c:5173 [inline]
 kvm_mmu_create+0xda/0x1d0 arch/x86/kvm/mmu.c:5191
 kvm_arch_vcpu_init+0x282/0x890 arch/x86/kvm/x86.c:8291
 kvm_vcpu_init+0x26d/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:321
 vmx_create_vcpu+0xef/0x29d0 arch/x86/kvm/vmx.c:10042
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2549 [inline]
 kvm_vm_ioctl+0x4ca/0x13e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3057
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 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: 0033:0x465f69
RSP: 002b:00007fb7e81e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdf5aeb5cf R14: 00007fb7e81e9300 R15: 0000000000022000
binder: 13789:13796 unknown command 0
binder: 13789:13796 ioctl c0306201 200001c0 returned -22
Mem-Info:
active_anon:449579 inactive_anon:15147 isolated_anon:0
 active_file:4961 inactive_file:45498 isolated_file:0
 unevictable:0 dirty:291 writeback:0 unstable:0
 slab_reclaimable:49293 slab_unreclaimable:382409
 mapped:64333 shmem:16006 pagetables:70932 bounce:0
 free:500175 free_pcp:520 free_cma:0
Node 0 active_anon:1438932kB inactive_anon:22104kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:216736kB dirty:0kB writeback:0kB shmem:22408kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 794624kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:359184kB inactive_anon:38484kB active_file:19844kB inactive_file:181988kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:40596kB dirty:1164kB writeback:0kB shmem:41616kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 0 DMA free:10972kB min:204kB low:252kB high:300kB active_anon:4216kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:32kB pagetables:76kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2717 2718 2718 2718
Node 0 DMA32 free:36020kB min:36200kB low:45248kB high:54296kB active_anon:1434716kB inactive_anon:22104kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:3129332kB managed:2788160kB mlocked:0kB kernel_stack:28960kB pagetables:59592kB bounce:0kB free_pcp:1056kB local_pcp:620kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:1954728kB min:53696kB low:67120kB high:80544kB active_anon:358536kB inactive_anon:38488kB active_file:19844kB inactive_file:181988kB unevictable:0kB writepending:1164kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:125216kB pagetables:223844kB bounce:0kB free_pcp:1396kB local_pcp:656kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 1*4kB (U) 3*8kB (UME) 0*16kB 2*32kB (UE) 2*64kB (UE) 4*128kB (UME) 2*256kB (ME) 3*512kB (UME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10972kB
Node 0 DMA32: 491*4kB (UMH) 181*8kB (UM) 248*16kB (ME) 351*32kB (UME) 146*64kB (UMEH) 45*128kB (UMEH) 7*256kB (UMH) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 36020kB
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
Node 1 Normal: 365*4kB (UME) 212*8kB (UME) 46*16kB (UME) 15*32kB (UME) 60*64kB (UME) 16*128kB (UM) 67*256kB (U) 44*512kB (UM) 18*1024kB (UE) 5*2048kB (UME) 458*4096kB (M) = 1954580kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
29880 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
2097051 pages RAM
0 pages HighMem/MovableOnly
363840 pages reserved
0 pages cma reserved
binder: 13822:13828 unknown command 0
binder: 13822:13828 ioctl c0306201 200001c0 returned -22
syz-executor.3: page allocation failure: order:0, mode:0x14000c4(GFP_KERNEL|GFP_DMA32), nodemask=(null)
syz-executor.3 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 13823 Comm: syz-executor.3 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline]
 __alloc_pages_nodemask+0x2127/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 alloc_mmu_pages arch/x86/kvm/mmu.c:5173 [inline]
 kvm_mmu_create+0xda/0x1d0 arch/x86/kvm/mmu.c:5191
 kvm_arch_vcpu_init+0x282/0x890 arch/x86/kvm/x86.c:8291
 kvm_vcpu_init+0x26d/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:321
 vmx_create_vcpu+0xef/0x29d0 arch/x86/kvm/vmx.c:10042
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2549 [inline]
 kvm_vm_ioctl+0x4ca/0x13e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3057
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 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: 0033:0x465f69
RSP: 002b:00007fb7e81e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdf5aeb5cf R14: 00007fb7e81e9300 R15: 0000000000022000
binder: 13838:13845 unknown command 0
binder: 13838:13845 ioctl c0306201 200001c0 returned -22
Mem-Info:
active_anon:449479 inactive_anon:15147 isolated_anon:0
 active_file:4963 inactive_file:45500 isolated_file:0
 unevictable:0 dirty:295 writeback:0 unstable:0
 slab_reclaimable:49305 slab_unreclaimable:382302
 mapped:64321 shmem:16006 pagetables:71021 bounce:0
 free:500318 free_pcp:445 free_cma:0
Node 0 active_anon:1438932kB inactive_anon:22104kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:216736kB dirty:0kB writeback:0kB shmem:22408kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 794624kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:359500kB inactive_anon:38484kB active_file:19848kB inactive_file:182000kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:40548kB dirty:1184kB writeback:0kB shmem:41616kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 0 DMA free:10972kB min:204kB low:252kB high:300kB active_anon:4216kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:32kB pagetables:76kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2717 2718 2718 2718
Node 0 DMA32 free:36012kB min:36200kB low:45248kB high:54296kB active_anon:1434716kB inactive_anon:22104kB active_file:4kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129332kB managed:2788160kB mlocked:0kB kernel_stack:28960kB pagetables:59592kB bounce:0kB free_pcp:1116kB local_pcp:680kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:1954244kB min:53696kB low:67120kB high:80544kB active_anon:358500kB inactive_anon:38484kB active_file:19848kB inactive_file:182000kB unevictable:0kB writepending:1184kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:125248kB pagetables:223836kB bounce:0kB free_pcp:1008kB local_pcp:616kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 1*4kB (U) 3*8kB (UME) 0*16kB 2*32kB (UE) 2*64kB (UE) 4*128kB (UME) 2*256kB (ME) 3*512kB (UME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10972kB
Node 0 DMA32: 491*4kB (UMH) 182*8kB (UMH) 249*16kB (MEH) 352*32kB (UMEH) 145*64kB (UMEH) 45*128kB (UMEH) 7*256kB (UMH) 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 36012kB
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
Node 1 Normal: 353*4kB (UME) 146*8kB (UME) 53*16kB (UME) 16*32kB (UME) 22*64kB (UME) 36*128kB (UM) 69*256kB (U) 44*512kB (UM) 18*1024kB (UE) 5*2048kB (UME) 458*4096kB (M) = 1954788kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
29890 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
2097051 pages RAM
0 pages HighMem/MovableOnly
363840 pages reserved
0 pages cma reserved
binder: 13871:13877 unknown command 0
binder: 13871:13877 ioctl c0306201 20000200 returned -22
binder: 13871:13883 unknown command 0
binder: 13871:13883 ioctl c0306201 20001540 returned -22
binder: 13871:13883 unknown command 0
binder: 13871:13891 unknown command 0
binder: 13871:13891 ioctl c0306201 20001540 returned -22
binder: 13871:13883 ioctl c0306201 20000200 returned -22
syz-executor.3: page allocation failure: order:0, mode:0x14000c4(GFP_KERNEL|GFP_DMA32), nodemask=(null)
syz-executor.3 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 13889 Comm: syz-executor.3 Not tainted 4.14.225-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+0x1b2/0x281 lib/dump_stack.c:58
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __alloc_pages_slowpath mm/page_alloc.c:4102 [inline]
 __alloc_pages_nodemask+0x2127/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 alloc_mmu_pages arch/x86/kvm/mmu.c:5173 [inline]
 kvm_mmu_create+0xda/0x1d0 arch/x86/kvm/mmu.c:5191
 kvm_arch_vcpu_init+0x282/0x890 arch/x86/kvm/x86.c:8291
 kvm_vcpu_init+0x26d/0x360 arch/x86/kvm/../../../virt/kvm/kvm_main.c:321
 vmx_create_vcpu+0xef/0x29d0 arch/x86/kvm/vmx.c:10042
 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2549 [inline]
 kvm_vm_ioctl+0x4ca/0x13e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3057
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 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: 0033:0x465f69
RSP: 002b:00007fb7e81e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdf5aeb5cf R14: 00007fb7e81e9300 R15: 0000000000022000
binder: 13911:13918 unknown command 0
binder: 13911:13920 unknown command 0
binder: 13911:13920 ioctl c0306201 20001540 returned -22

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2021/03/15 09:45 linux-4.14.y c7150cd2fa8c cc1cff8f .config log report info WARNING: suspicious RCU usage in kvm_mmu_create