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possible deadlock in shmem_fallocate

Status: auto-closed as invalid on 2019/11/29 05:22
Reported-by: syzbot+af820224431ab57688b7@syzkaller.appspotmail.com
First crash: 1741d, last: 1741d
▶ ▼ Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 possible deadlock in shmem_fallocate (2) 2 1451d 1519d 0/1 auto-closed as invalid on 2020/09/14 02:25
upstream possible deadlock in shmem_fallocate mm 8087 2393d 2436d 0/26 closed as invalid on 2017/11/05 09:38
android-49 possible deadlock in shmem_fallocate C 2441 1616d 1853d 0/3 public: reported C repro on 2019/04/11 08:44
android-414 possible deadlock in shmem_fallocate C 7876 1616d 1853d 0/1 public: reported C repro on 2019/04/11 00:00
upstream possible deadlock in shmem_fallocate (3) mm 1 1705d 1701d 0/26 auto-closed as invalid on 2019/11/05 02:34
upstream possible deadlock in shmem_fallocate (4) mm C done 81 1379d 1593d 15/26 fixed on 2020/09/16 22:51
upstream possible deadlock in shmem_fallocate (2) mm C 1325 1888d 2096d 11/26 fixed on 2019/03/28 12:00

Sample crash report:
======================================================
WARNING: possible circular locking dependency detected
4.19.63 #37 Not tainted
------------------------------------------------------
syz-executor.4/28100 is trying to acquire lock:
00000000b60c42d8 (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:747 [inline]
00000000b60c42d8 (&sb->s_type->i_mutex_key#12){+.+.}, at: shmem_fallocate+0x15a/0xc60 mm/shmem.c:2680

but task is already holding lock:
00000000068ad087 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/compiler.h:193

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (fs_reclaim){+.+.}:
       __fs_reclaim_acquire mm/page_alloc.c:3749 [inline]
       fs_reclaim_acquire.part.0+0x24/0x30 mm/page_alloc.c:3760
       fs_reclaim_acquire mm/page_alloc.c:4334 [inline]
       prepare_alloc_pages mm/page_alloc.c:4331 [inline]
       __alloc_pages_nodemask+0x4fc/0x750 mm/page_alloc.c:4383
       alloc_pages_vma+0xdd/0x590 mm/mempolicy.c:2111
       shmem_alloc_page+0xc0/0x180 mm/shmem.c:1494
       shmem_alloc_and_acct_page+0x165/0x970 mm/shmem.c:1519
       shmem_getpage_gfp+0x44a/0x3640 mm/shmem.c:1797
       shmem_getpage mm/shmem.c:132 [inline]
       shmem_write_begin+0x10b/0x1e0 mm/shmem.c:2432
       generic_perform_write+0x22a/0x520 mm/filemap.c:3161
       __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3286
       generic_file_write_iter+0x383/0x72f mm/filemap.c:3314
       call_write_iter include/linux/fs.h:1820 [inline]
       new_sync_write fs/read_write.c:474 [inline]
       __vfs_write+0x587/0x810 fs/read_write.c:487
       vfs_write+0x20c/0x560 fs/read_write.c:549
       ksys_write+0x14f/0x2d0 fs/read_write.c:599
       __do_sys_write fs/read_write.c:611 [inline]
       __se_sys_write fs/read_write.c:608 [inline]
       __x64_sys_write+0x73/0xb0 fs/read_write.c:608
       do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&sb->s_type->i_mutex_key#12){+.+.}:
       lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900
       down_write+0x38/0x90 kernel/locking/rwsem.c:70
       inode_lock include/linux/fs.h:747 [inline]
       shmem_fallocate+0x15a/0xc60 mm/shmem.c:2680
       ashmem_shrink_scan drivers/staging/android/ashmem.c:461 [inline]
       ashmem_shrink_scan+0x370/0x510 drivers/staging/android/ashmem.c:436
       do_shrink_slab+0x3db/0xa40 mm/vmscan.c:537
       shrink_slab mm/vmscan.c:686 [inline]
       shrink_slab+0x4be/0x5e0 mm/vmscan.c:666
       shrink_node+0x311/0x1450 mm/vmscan.c:2730
       shrink_zones mm/vmscan.c:2959 [inline]
       do_try_to_free_pages+0x3cb/0x11c0 mm/vmscan.c:3017
       try_to_free_pages+0x2ee/0x7f0 mm/vmscan.c:3232
       __perform_reclaim mm/page_alloc.c:3790 [inline]
       __alloc_pages_direct_reclaim mm/page_alloc.c:3811 [inline]
       __alloc_pages_slowpath+0x990/0x2870 mm/page_alloc.c:4201
       __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
       alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
       alloc_pages include/linux/gfp.h:509 [inline]
       __vmalloc_area_node mm/vmalloc.c:1690 [inline]
       __vmalloc_node_range+0x4a7/0x790 mm/vmalloc.c:1750
       __vmalloc_node mm/vmalloc.c:1795 [inline]
       __vmalloc_node_flags_caller+0x71/0x90 mm/vmalloc.c:1817
       kvmalloc_node+0xdc/0x100 mm/util.c:432
       kvmalloc include/linux/mm.h:577 [inline]
       kvmalloc_array include/linux/mm.h:595 [inline]
       kvcalloc include/linux/mm.h:600 [inline]
       kvm_arch_create_memslot+0xc3/0x570 arch/x86/kvm/x86.c:9120
       __kvm_set_memory_region+0x153c/0x1ff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1014
       kvm_set_memory_region+0x2f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1086
       kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1098 [inline]
       kvm_vm_ioctl+0x7b8/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2995
       vfs_ioctl fs/ioctl.c:46 [inline]
       file_ioctl fs/ioctl.c:501 [inline]
       do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
       ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
       __do_sys_ioctl fs/ioctl.c:712 [inline]
       __se_sys_ioctl fs/ioctl.c:710 [inline]
       __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
       do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(fs_reclaim);
                               lock(&sb->s_type->i_mutex_key#12);
                               lock(fs_reclaim);
  lock(&sb->s_type->i_mutex_key#12);

 *** DEADLOCK ***

3 locks held by syz-executor.4/28100:
 #0: 000000002c3c49f7 (&kvm->slots_lock){+.+.}, at: kvm_set_memory_region+0x24/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1085
 #1: 00000000068ad087 (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.0+0x0/0x30 include/linux/compiler.h:193
 #2: 00000000cb77dc11 (shrinker_rwsem){++++}, at: shrink_slab mm/vmscan.c:676 [inline]
 #2: 00000000cb77dc11 (shrinker_rwsem){++++}, at: shrink_slab+0x402/0x5e0 mm/vmscan.c:666

stack backtrace:
CPU: 0 PID: 28100 Comm: syz-executor.4 Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221
 check_prev_add kernel/locking/lockdep.c:1861 [inline]
 check_prevs_add kernel/locking/lockdep.c:1974 [inline]
 validate_chain kernel/locking/lockdep.c:2415 [inline]
 __lock_acquire+0x2e19/0x49c0 kernel/locking/lockdep.c:3411
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900
 down_write+0x38/0x90 kernel/locking/rwsem.c:70
 inode_lock include/linux/fs.h:747 [inline]
 shmem_fallocate+0x15a/0xc60 mm/shmem.c:2680
 ashmem_shrink_scan drivers/staging/android/ashmem.c:461 [inline]
 ashmem_shrink_scan+0x370/0x510 drivers/staging/android/ashmem.c:436
 do_shrink_slab+0x3db/0xa40 mm/vmscan.c:537
 shrink_slab mm/vmscan.c:686 [inline]
 shrink_slab+0x4be/0x5e0 mm/vmscan.c:666
 shrink_node+0x311/0x1450 mm/vmscan.c:2730
 shrink_zones mm/vmscan.c:2959 [inline]
 do_try_to_free_pages+0x3cb/0x11c0 mm/vmscan.c:3017
 try_to_free_pages+0x2ee/0x7f0 mm/vmscan.c:3232
 __perform_reclaim mm/page_alloc.c:3790 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3811 [inline]
 __alloc_pages_slowpath+0x990/0x2870 mm/page_alloc.c:4201
 __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
 alloc_pages include/linux/gfp.h:509 [inline]
 __vmalloc_area_node mm/vmalloc.c:1690 [inline]
 __vmalloc_node_range+0x4a7/0x790 mm/vmalloc.c:1750
 __vmalloc_node mm/vmalloc.c:1795 [inline]
 __vmalloc_node_flags_caller+0x71/0x90 mm/vmalloc.c:1817
 kvmalloc_node+0xdc/0x100 mm/util.c:432
 kvmalloc include/linux/mm.h:577 [inline]
 kvmalloc_array include/linux/mm.h:595 [inline]
 kvcalloc include/linux/mm.h:600 [inline]
 kvm_arch_create_memslot+0xc3/0x570 arch/x86/kvm/x86.c:9120
 __kvm_set_memory_region+0x153c/0x1ff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1014
 kvm_set_memory_region+0x2f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1086
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1098 [inline]
 kvm_vm_ioctl+0x7b8/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2995
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: Bad RIP value.
RSP: 002b:00007ff464c8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000380 RSI: 000000004020ae46 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff464c8e6d4
R13: 00000000004c2ce1 R14: 00000000004d6270 R15: 00000000ffffffff
syz-fuzzer invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0
syz-fuzzer cpuset=/ mems_allowed=0-1
CPU: 0 PID: 7828 Comm: syz-fuzzer Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 dump_header+0x15e/0xa55 mm/oom_kill.c:441
 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954
 out_of_memory mm/oom_kill.c:1129 [inline]
 out_of_memory+0x936/0x12d0 mm/oom_kill.c:1062
 __alloc_pages_may_oom mm/page_alloc.c:3543 [inline]
 __alloc_pages_slowpath+0x20af/0x2870 mm/page_alloc.c:4245
 __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc mm/filemap.c:968 [inline]
 __page_cache_alloc+0x2bd/0x450 mm/filemap.c:953
 page_cache_read mm/filemap.c:2407 [inline]
 filemap_fault+0x10bb/0x2250 mm/filemap.c:2591
 ext4_filemap_fault+0x83/0xaf fs/ext4/inode.c:6300
 __do_fault+0x111/0x480 mm/memory.c:3269
 do_read_fault mm/memory.c:3681 [inline]
 do_fault mm/memory.c:3810 [inline]
 handle_pte_fault mm/memory.c:4041 [inline]
 __handle_mm_fault+0x2d78/0x3f80 mm/memory.c:4165
 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1393
 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1468
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1203
RIP: 0033:0x45b153
Code: Bad RIP value.
RSP: 002b:000000c420039ea0 EFLAGS: 00010202
RAX: ffffffffffffff92 RBX: 000000003b94b0e0 RCX: 000000000045b153
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000017be660
RBP: 000000c420039ee8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000c420039ed8 R11: 0000000000000202 R12: 00000283727b2b1a
R13: 0000000000000001 R14: 0000000000c052e0 R15: ffffffffffffbd1d
Mem-Info:
active_anon:183835 inactive_anon:8034 isolated_anon:0
 active_file:25 inactive_file:0 isolated_file:7
 unevictable:7680 dirty:0 writeback:23 unstable:0
 slab_reclaimable:20647 slab_unreclaimable:125134
 mapped:52234 shmem:2310 pagetables:5291 bounce:0
 free:25737 free_pcp:16 free_cma:0
Node 0 active_anon:735216kB inactive_anon:32116kB active_file:92kB inactive_file:44kB unevictable:30720kB isolated(anon):0kB isolated(file):28kB mapped:208936kB dirty:0kB writeback:88kB shmem:9220kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 528384kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:124kB inactive_anon:20kB active_file:8kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:4kB shmem:20kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 0 DMA free:10496kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:120kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2555 2557 2557
Node 0 DMA32 free:36244kB min:36248kB low:45308kB high:54368kB active_anon:735232kB inactive_anon:32116kB active_file:56kB inactive_file:324kB unevictable:30720kB writepending:0kB present:3129332kB managed:2619972kB mlocked:30720kB kernel_stack:12448kB pagetables:21164kB bounce:0kB free_pcp:784kB local_pcp:504kB free_cma:0kB
lowmem_reserve[]: 0 0 2 2
Node 0 Normal free:12kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 1 Normal free:53404kB min:53608kB low:67008kB high:80408kB active_anon:124kB inactive_anon:20kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:248kB local_pcp:248kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 4*4kB (UME) 8*8kB (U) 4*16kB (UM) 2*32kB (UE) 3*64kB (UME) 3*128kB (UME) 2*256kB (UM) 2*512kB (ME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10512kB
Node 0 DMA32: 2825*4kB (UME) 1262*8kB (UME) 440*16kB (UM) 218*32kB (UM) 13*64kB (UM) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 36244kB
Node 0 Normal: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 12kB
Node 1 Normal: 35*4kB (UME) 34*8kB (ME) 26*16kB (ME) 19*32kB (ME) 16*64kB (ME) 10*128kB (UM) 4*256kB (M) 1*512kB (E) 1*1024kB (M) 3*2048kB (UME) 10*4096kB (M) = 53404kB
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
2362 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
338856 pages reserved
0 pages cma reserved
Out of memory: Kill process 8248 (syz-executor.1) score 1008 or sacrifice child
Killed process 8248 (syz-executor.1) total-vm:72844kB, anon-rss:18488kB, file-rss:34688kB, shmem-rss:0kB
oom_reaper: reaped process 8248 (syz-executor.1), now anon-rss:0kB, file-rss:34816kB, shmem-rss:0kB
syz-fuzzer invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0
syz-fuzzer cpuset=/ mems_allowed=0-1
CPU: 1 PID: 7828 Comm: syz-fuzzer Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 dump_header+0x15e/0xa55 mm/oom_kill.c:441
 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954
 out_of_memory mm/oom_kill.c:1129 [inline]
 out_of_memory+0x936/0x12d0 mm/oom_kill.c:1062
 __alloc_pages_may_oom mm/page_alloc.c:3543 [inline]
 __alloc_pages_slowpath+0x20af/0x2870 mm/page_alloc.c:4245
 __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc mm/filemap.c:968 [inline]
 __page_cache_alloc+0x2bd/0x450 mm/filemap.c:953
 page_cache_read mm/filemap.c:2407 [inline]
 filemap_fault+0x10bb/0x2250 mm/filemap.c:2591
 ext4_filemap_fault+0x83/0xaf fs/ext4/inode.c:6300
 __do_fault+0x111/0x480 mm/memory.c:3269
 do_read_fault mm/memory.c:3681 [inline]
 do_fault mm/memory.c:3810 [inline]
 handle_pte_fault mm/memory.c:4041 [inline]
 __handle_mm_fault+0x2d78/0x3f80 mm/memory.c:4165
 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1393
 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1468
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1203
RIP: 0033:0x40f170
Code: Bad RIP value.
RSP: 002b:000000c420039ef8 EFLAGS: 00010216
RAX: ffffffffffffff92 RBX: 000000003b94b0e0 RCX: 000000000045b153
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000017be660
RBP: 000000c420039ef0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000c420039ed8 R11: 0000000000000202 R12: 00000283727b2b1a
R13: 0000000000000001 R14: 0000000000c052e0 R15: ffffffffffffbd1d
Mem-Info:
active_anon:183838 inactive_anon:6486 isolated_anon:0
 active_file:32 inactive_file:26 isolated_file:0
 unevictable:4608 dirty:0 writeback:0 unstable:0
 slab_reclaimable:20633 slab_unreclaimable:125012
 mapped:52231 shmem:2310 pagetables:5259 bounce:0
 free:25011 free_pcp:0 free_cma:0
Node 0 active_anon:735228kB inactive_anon:25924kB active_file:124kB inactive_file:104kB unevictable:18432kB isolated(anon):0kB isolated(file):0kB mapped:208924kB dirty:0kB writeback:0kB shmem:9220kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 512000kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:124kB inactive_anon:20kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:20kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 0 DMA free:10436kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2555 2557 2557
Node 0 DMA32 free:36000kB min:36248kB low:45308kB high:54368kB active_anon:735228kB inactive_anon:25924kB active_file:124kB inactive_file:104kB unevictable:18432kB writepending:0kB present:3129332kB managed:2619972kB mlocked:18432kB kernel_stack:12416kB pagetables:21036kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 2 2
Node 0 Normal free:12kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 1 Normal free:53596kB min:53608kB low:67008kB high:80408kB active_anon:124kB inactive_anon:20kB active_file:4kB inactive_file:0kB unevictable:0kB writepending:0kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 3*4kB (UE) 1*8kB (U) 1*16kB (U) 1*32kB (E) 2*64kB (UE) 2*128kB (UE) 1*256kB (U) 1*512kB (E) 1*1024kB (E) 2*2048kB (ME) 1*4096kB (M) = 10436kB
Node 0 DMA32: 2849*4kB (UME) 1108*8kB (UME) 456*16kB (UM) 230*32kB (UM) 13*64kB (UM) 3*128kB (UM) 1*256kB (M) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 36388kB
Node 0 Normal: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 12kB
Node 1 Normal: 34*4kB (ME) 35*8kB (UME) 27*16kB (UME) 20*32kB (UME) 17*64kB (UME) 9*128kB (M) 5*256kB (UM) 1*512kB (E) 1*1024kB (M) 3*2048kB (UME) 10*4096kB (M) = 53648kB
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
2343 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
338856 pages reserved
0 pages cma reserved
Out of memory: Kill process 8244 (syz-executor.1) score 1008 or sacrifice child
Killed process 8244 (syz-executor.1) total-vm:72712kB, anon-rss:18356kB, file-rss:34688kB, shmem-rss:0kB
oom_reaper: reaped process 28100 (syz-executor.4), now anon-rss:0kB, file-rss:34816kB, shmem-rss:0kB
rsyslogd invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0
rsyslogd cpuset=/ mems_allowed=0-1
CPU: 0 PID: 7677 Comm: rsyslogd Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 dump_header+0x15e/0xa55 mm/oom_kill.c:441
 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954
 out_of_memory mm/oom_kill.c:1129 [inline]
 out_of_memory+0x936/0x12d0 mm/oom_kill.c:1062
 __alloc_pages_may_oom mm/page_alloc.c:3543 [inline]
 __alloc_pages_slowpath+0x20af/0x2870 mm/page_alloc.c:4245
 __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc mm/filemap.c:968 [inline]
 __page_cache_alloc+0x2bd/0x450 mm/filemap.c:953
 page_cache_read mm/filemap.c:2407 [inline]
 filemap_fault+0x10bb/0x2250 mm/filemap.c:2591
 ext4_filemap_fault+0x83/0xaf fs/ext4/inode.c:6300
 __do_fault+0x111/0x480 mm/memory.c:3269
 do_read_fault mm/memory.c:3681 [inline]
 do_fault mm/memory.c:3810 [inline]
 handle_pte_fault mm/memory.c:4041 [inline]
 __handle_mm_fault+0x2d78/0x3f80 mm/memory.c:4165
 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1393
 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1468
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1203
RIP: 0033:0x7fd931946397
Code: Bad RIP value.
RSP: 002b:00007fd92f5eeca8 EFLAGS: 00010202
RAX: 00007fd9319f2a80 RBX: 00007fd9319f2a80 RCX: 00000000000000d5
RDX: 000000000000000b RSI: 000000000000000b RDI: 0000000000000003
RBP: 00007fd92f5eed10 R08: 0000000000000000 R09: 00000000000007e3
R10: 0000000000000012 R11: a3d70a3d70a3d70b R12: 0000000000000000
R13: ffffffffffffffed R14: 0000000000000de6 R15: 00007fd930e23624
Mem-Info:
active_anon:183298 inactive_anon:6016 isolated_anon:0
 active_file:20 inactive_file:23 isolated_file:0
 unevictable:512 dirty:0 writeback:0 unstable:0
 slab_reclaimable:20633 slab_unreclaimable:125012
 mapped:52229 shmem:2310 pagetables:5221 bounce:0
 free:13720 free_pcp:153 free_cma:0
syz-executor.4: vmalloc: allocation failure, allocated 4791607296 of 6444519424 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
Node 0 active_anon:733080kB inactive_anon:23956kB active_file:64kB inactive_file:68kB unevictable:2048kB isolated(anon):0kB isolated(file):0kB mapped:208904kB dirty:0kB writeback:0kB shmem:9220kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 493568kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
syz-executor.4 cpuset=
Node 1 active_anon:108kB inactive_anon:20kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:20kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
syz4 mems_allowed=0-1
Node 0 DMA free:10364kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
CPU: 1 PID: 28100 Comm: syz-executor.4 Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 warn_alloc.cold+0x7b/0x173 mm/page_alloc.c:3447
 __vmalloc_area_node mm/vmalloc.c:1709 [inline]
 __vmalloc_node_range+0x528/0x790 mm/vmalloc.c:1750
lowmem_reserve[]:
 __vmalloc_node mm/vmalloc.c:1795 [inline]
 __vmalloc_node_flags_caller+0x71/0x90 mm/vmalloc.c:1817
 kvmalloc_node+0xdc/0x100 mm/util.c:432
 kvmalloc include/linux/mm.h:577 [inline]
 kvmalloc_array include/linux/mm.h:595 [inline]
 kvcalloc include/linux/mm.h:600 [inline]
 kvm_arch_create_memslot+0xc3/0x570 arch/x86/kvm/x86.c:9120
 0
 __kvm_set_memory_region+0x153c/0x1ff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1014
 2555
 2557
 kvm_set_memory_region+0x2f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1086
 2557
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1098 [inline]
 kvm_vm_ioctl+0x7b8/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2995
Node 0 
DMA32 free:19340kB min:36248kB low:45308kB high:54368kB active_anon:733080kB inactive_anon:23956kB active_file:64kB inactive_file:68kB unevictable:2048kB writepending:0kB present:3129332kB managed:2619972kB mlocked:2048kB kernel_stack:12384kB pagetables:20904kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]:
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 0
 0
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: Bad RIP value.
RSP: 002b:00007ff464c8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000380 RSI: 000000004020ae46 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff464c8e6d4
R13: 00000000004c2ce1 R14: 00000000004d6270 R15: 00000000ffffffff
Mem-Info:
 2
active_anon:183297 inactive_anon:5994 isolated_anon:0
 active_file:16 inactive_file:18 isolated_file:0
 unevictable:512 dirty:0 writeback:0 unstable:0
 slab_reclaimable:20585 slab_unreclaimable:124777
 mapped:52226 shmem:2310 pagetables:5226 bounce:0
 free:14149 free_pcp:0 free_cma:0
 2
Node 0 active_anon:733080kB inactive_anon:23956kB active_file:64kB inactive_file:68kB unevictable:2048kB isolated(anon):0kB isolated(file):0kB mapped:208904kB dirty:0kB writeback:0kB shmem:9220kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 493568kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 active_anon:108kB inactive_anon:20kB active_file:0kB inactive_file:4kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:20kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 0 
Node 0 
Normal free:12kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]:
DMA free:10364kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 0
lowmem_reserve[]:
 0
 0
 0 0
Node 1 Normal free:26880kB min:53608kB low:67008kB high:80408kB active_anon:108kB inactive_anon:20kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 5*4kB (UE) 7*8kB (U) 0*16kB 
 2555
2*32kB 
 2557
(UE) 
 2557
2*64kB (UE) 1*128kB (E) 1*256kB (U) 1*512kB (E) 1*1024kB (E) 2*2048kB (ME) 1*4096kB (M) = 10380kB
Node 0 DMA32: 1553*4kB (UME) 541*8kB (UME) 216*16kB (UM) 153*32kB (UM) 0*64kB 
4*128kB 
Node 0 
(U) 
DMA32 free:19340kB min:36248kB low:45308kB high:54368kB active_anon:733080kB inactive_anon:23956kB active_file:64kB inactive_file:68kB unevictable:2048kB writepending:0kB present:3129332kB managed:2619972kB mlocked:2048kB kernel_stack:12384kB pagetables:20904kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 19404kB
Node 0 Normal: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 
lowmem_reserve[]:
0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 12kB
Node 1 Normal: 30*4kB (ME) 31*8kB (UME) 25*16kB (UME) 20*32kB (ME) 17*64kB (ME) 9*128kB (M) 5*256kB (UM) 1*512kB (E) 
 0
1*1024kB 
 0
(M) 
 2
2*2048kB 
 2
(ME) 
4*4096kB 
Node 0 
(M) = 26944kB
Normal free:12kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
 0
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
 0
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
 0
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
2344 total pagecache pages
Node 1 
0 pages in swap cache
Normal free:26880kB min:53608kB low:67008kB high:80408kB active_anon:108kB inactive_anon:20kB active_file:0kB inactive_file:4kB unevictable:0kB writepending:0kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
Swap cache stats: add 0, delete 0, find 0/0
lowmem_reserve[]:
Free swap  = 0kB
 0
Total swap = 0kB
 0
1965979 pages RAM
 0
0 pages HighMem/MovableOnly
 0
338856 pages reserved
0 pages cma reserved
Node 0 
Out of memory: Kill process 8738 (syz-executor.1) score 1008 or sacrifice child
DMA: 
Killed process 8738 (syz-executor.1) total-vm:72712kB, anon-rss:18356kB, file-rss:34688kB, shmem-rss:0kB
5*4kB (UE) 7*8kB (U) 0*16kB 2*32kB (UE) 2*64kB (UE) 1*128kB (E) 1*256kB (U) 1*512kB (E) 1*1024kB (E) 2*2048kB (ME) 1*4096kB (M) = 10380kB
Node 0 DMA32: 1472*4kB (UME) 560*8kB (UME) 248*16kB (UM) 167*32kB (UM) 0*64kB 4*128kB (U) 0*256kB 0*512kB 0*1024kB 2*2048kB (M) 3*4096kB (M) = 36576kB
Node 0 Normal: 1*4kB (U) 1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 12kB
Node 1 Normal: 30*4kB (ME) 31*8kB (UME) 25*16kB (UME) 20*32kB (ME) 17*64kB (ME) 9*128kB (M) 5*256kB (UM) 1*512kB (E) 1*1024kB (M) 2*2048kB (ME) 4*4096kB (M) = 26944kB
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
2348 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
338856 pages reserved
0 pages cma reserved
syz-fuzzer invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null), order=0, oom_score_adj=0
syz-fuzzer cpuset=/ mems_allowed=0-1
CPU: 0 PID: 7840 Comm: syz-fuzzer Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 dump_header+0x15e/0xa55 mm/oom_kill.c:441
 oom_kill_process.cold+0x10/0x6ef mm/oom_kill.c:954
 out_of_memory mm/oom_kill.c:1129 [inline]
 out_of_memory+0x936/0x12d0 mm/oom_kill.c:1062
 __alloc_pages_may_oom mm/page_alloc.c:3543 [inline]
 __alloc_pages_slowpath+0x20af/0x2870 mm/page_alloc.c:4245
 __alloc_pages_nodemask+0x617/0x750 mm/page_alloc.c:4409
 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2147
 alloc_pages include/linux/gfp.h:509 [inline]
 __page_cache_alloc mm/filemap.c:968 [inline]
 __page_cache_alloc+0x2bd/0x450 mm/filemap.c:953
 page_cache_read mm/filemap.c:2407 [inline]
 filemap_fault+0x10bb/0x2250 mm/filemap.c:2591
 ext4_filemap_fault+0x83/0xaf fs/ext4/inode.c:6300
 __do_fault+0x111/0x480 mm/memory.c:3269
 do_read_fault mm/memory.c:3681 [inline]
 do_fault mm/memory.c:3810 [inline]
 handle_pte_fault mm/memory.c:4041 [inline]
 __handle_mm_fault+0x2d78/0x3f80 mm/memory.c:4165
 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1393
 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1468
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1203
RIP: 0033:0x40a3af
Code: Bad RIP value.
RSP: 002b:000000c42b637a90 EFLAGS: 00010246
RAX: 000000000081a0a0 RBX: 00000000008c9984 RCX: 000000c42adc4d00
RDX: 0000000000000001 RSI: 0000000000000011 RDI: 00000000008c9984
RBP: 000000c42b637af0 R08: 000000c420000180 R09: 00000000000000e2
R10: 0000000000000000 R11: 000000c42adc4d00 R12: 000000000000000a
R13: 000000000000000a R14: 0000000000000032 R15: 0000000000000002
Mem-Info:
active_anon:183326 inactive_anon:1918 isolated_anon:0
 active_file:38 inactive_file:15 isolated_file:0
 unevictable:0 dirty:25 writeback:0 unstable:0
 slab_reclaimable:20558 slab_unreclaimable:124931
 mapped:52247 shmem:2310 pagetables:5194 bounce:0
 free:18258 free_pcp:171 free_cma:0
Node 0 active_anon:733196kB inactive_anon:7652kB active_file:120kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:208888kB dirty:100kB writeback:0kB shmem:9220kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 477184kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 1 active_anon:108kB inactive_anon:20kB active_file:4kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:20kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 0 DMA free:10488kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:28kB inactive_file:28kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2555 2557 2557
Node 0 DMA32 free:38524kB min:36248kB low:45308kB high:54368kB active_anon:733196kB inactive_anon:7652kB active_file:16kB inactive_file:452kB unevictable:0kB writepending:0kB present:3129332kB managed:2619972kB mlocked:0kB kernel_stack:12352kB pagetables:20776kB bounce:0kB free_pcp:1340kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 2 2
Node 0 Normal free:12kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 1 Normal free:109304kB min:53608kB low:67008kB high:80408kB active_anon:108kB inactive_anon:20kB active_file:0kB inactive_file:72kB unevictable:0kB writepending:4kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1524kB local_pcp:140kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 14*4kB (UME) 23*8kB (U) 2*16kB (U) 1*32kB (E) 3*64kB (UME) 2*128kB (ME) 2*256kB (UM) 2*512kB (ME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 10480kB
Node 0 DMA32: 1276*4kB (UMEH) 736*8kB (UME) 282*16kB (UMH) 180*32kB (UMH) 17*64kB (U) 4*128kB (U) 1*256kB (U) 0*512kB 0*1024kB 2*2048kB (M) 3*4096kB (M) = 39504kB
Node 0 Normal: 1*4kB (E) 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4kB
Node 1 Normal: 61*4kB (UE) 227*8kB (UE) 255*16kB (UE) 9*32kB (UE) 22*64kB (UME) 17*128kB (UM) 11*256kB (UM) 6*512kB (UE) 3*1024kB (UM) 3*2048kB (UME) 64*4096kB (UM) = 287260kB
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
2839 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
338856 pages reserved
0 pages cma reserved
Out of memory: Kill process 5684 (syz-executor.1) score 1005 or sacrifice child
Killed process 5684 (syz-executor.1) total-vm:72976kB, anon-rss:4280kB, file-rss:34816kB, shmem-rss:0kB
kobject: 'kvm' (000000006872e301): kobject_uevent_env
kobject: 'kvm' (000000006872e301): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (00000000b61af28c): kobject_uevent_env
kobject: 'loop4' (00000000b61af28c): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (000000006872e301): kobject_uevent_env
kobject: 'kvm' (000000006872e301): fill_kobj_path: path = '/devices/virtual/misc/kvm'
syz-executor.4: vmalloc: allocation failure: 10756259840 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
syz-executor.4 cpuset=syz4 mems_allowed=0-1
CPU: 0 PID: 28334 Comm: syz-executor.4 Not tainted 4.19.63 #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 warn_alloc.cold+0x7b/0x173 mm/page_alloc.c:3447
 __vmalloc_node_range mm/vmalloc.c:1766 [inline]
 __vmalloc_node_range+0x481/0x790 mm/vmalloc.c:1732
 __vmalloc_node mm/vmalloc.c:1795 [inline]
 __vmalloc_node_flags_caller+0x71/0x90 mm/vmalloc.c:1817
 kvmalloc_node+0xdc/0x100 mm/util.c:432
 kvmalloc include/linux/mm.h:577 [inline]
 kvmalloc_array include/linux/mm.h:595 [inline]
 kvcalloc include/linux/mm.h:600 [inline]
 kvm_arch_create_memslot+0xc3/0x570 arch/x86/kvm/x86.c:9120
 __kvm_set_memory_region+0x153c/0x1ff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1014
 kvm_set_memory_region+0x2f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1086
 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1098 [inline]
 kvm_vm_ioctl+0x7b8/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2995
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff464c8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000020000380 RSI: 000000004020ae46 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff464c8e6d4
R13: 00000000004c2ce1 R14: 00000000004d6270 R15: 00000000ffffffff
Mem-Info:
active_anon:182830 inactive_anon:1915 isolated_anon:0
 active_file:434 inactive_file:3175 isolated_file:0
 unevictable:0 dirty:28 writeback:0 unstable:0
 slab_reclaimable:20514 slab_unreclaimable:124451
 mapped:54532 shmem:2310 pagetables:5173 bounce:0
 free:1187934 free_pcp:973 free_cma:0
Node 0 active_anon:731216kB inactive_anon:7644kB active_file:1192kB inactive_file:8408kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:214084kB dirty:92kB writeback:0kB shmem:9224kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 475136kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 1 active_anon:104kB inactive_anon:16kB active_file:544kB inactive_file:4492kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:4144kB dirty:20kB writeback:0kB shmem:16kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
Node 0 DMA free:12064kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:16kB inactive_file:68kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 2555 2557 2557
Node 0 DMA32 free:962176kB min:36248kB low:45308kB high:54368kB active_anon:731408kB inactive_anon:7644kB active_file:2476kB inactive_file:7940kB unevictable:0kB writepending:92kB present:3129332kB managed:2619972kB mlocked:0kB kernel_stack:12512kB pagetables:20988kB bounce:0kB free_pcp:2076kB local_pcp:1304kB free_cma:0kB
kobject: 'loop1' (0000000066baddcd): kobject_uevent_env
lowmem_reserve[]: 0 0 2 2
Node 0 Normal free:4kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:2428kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
kobject: 'loop1' (0000000066baddcd): fill_kobj_path: path = '/devices/virtual/block/loop1'
lowmem_reserve[]: 0 0 0 0
kobject: 'loop2' (000000002e5b6576): kobject_uevent_env
Node 1 Normal free:3775192kB min:53608kB low:67008kB high:80408kB active_anon:104kB inactive_anon:16kB active_file:644kB inactive_file:4392kB unevictable:0kB writepending:20kB present:3932160kB managed:3870184kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:1812kB local_pcp:1444kB free_cma:0kB
kobject: 'loop2' (000000002e5b6576): fill_kobj_path: path = '/devices/virtual/block/loop2'
lowmem_reserve[]: 0 0 0 0
kobject: 'loop3' (000000007f160b2b): kobject_uevent_env
Node 0 DMA: 18*4kB (UME) 113*8kB (UM) 41*16kB (UM) 15*32kB (UME) 5*64kB (UME) 1*128kB (E) 2*256kB (UM) 2*512kB (ME) 2*1024kB (ME) 1*2048kB (E) 1*4096kB (M) = 12288kB
kobject: 'loop3' (000000007f160b2b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop3' (000000007f160b2b): kobject_uevent_env
Node 0 DMA32: 5019*4kB (UMEH) 7010*8kB (UMEH) 2194*16kB (UMEH) 1491*32kB (UMEH) 607*64kB (UMEH) 270*128kB (UM) 106*256kB (UM) 40*512kB (U) 25*1024kB (U) 23*2048kB (UM) 148*4096kB (UM) = 958908kB
kobject: 'loop3' (000000007f160b2b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000066baddcd): kobject_uevent_env
Node 0 Normal: 
kobject: 'loop1' (0000000066baddcd): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000001e293ed3): kobject_uevent_env
kobject: 'loop0' (000000001e293ed3): fill_kobj_path: path = '/devices/virtual/block/loop0'
1*4kB 
kobject: 'loop1' (0000000066baddcd): kobject_uevent_env
(E) 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 4kB
kobject: 'loop1' (0000000066baddcd): fill_kobj_path: path = '/devices/virtual/block/loop1'
Node 1 Normal: 6*4kB (UE) 224*8kB (UE) 254*16kB (UE) 11*32kB (UME) 18*64kB (UME) 8*128kB (U) 8*256kB (UM) 5*512kB (UE) 2*1024kB (U) 4*2048kB (UME) 916*4096kB (UM) = 3775192kB
kobject: 'loop0' (000000001e293ed3): kobject_uevent_env
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
kobject: 'loop0' (000000001e293ed3): fill_kobj_path: path = '/devices/virtual/block/loop0'
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
6225 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
1965979 pages RAM
0 pages HighMem/MovableOnly
338856 pages reserved
0 pages cma reserved
kobject: 'kvm' (000000006872e301): kobject_uevent_env
kobject: 'kvm' (000000006872e301): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (00000000b61af28c): kobject_uevent_env
kobject: 'loop4' (00000000b61af28c): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002e5b6576): kobject_uevent_env
kobject: 'kvm' (000000006872e301): kobject_uevent_env
kobject: 'loop2' (000000002e5b6576): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'kvm' (000000006872e301): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (0000000066baddcd): kobject_uevent_env
kobject: 'loop1' (0000000066baddcd): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000007f160b2b): kobject_uevent_env
kobject: 'loop3' (000000007f160b2b): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000001e293ed3): kobject_uevent_env
kobject: 'loop0' (000000001e293ed3): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (000000002e5b6576): kobject_uevent_env
kobject: 'loop2' (000000002e5b6576): fill_kobj_path: path = '/devices/virtual/block/loop2'

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/01 05:21 linux-4.19.y 9a9de33a9dfa c692b5bd .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.