syzkaller login: [ 38.729106] BUG: Bad rss-counter state mm:00000000791ca000 type:MM_FILEPAGES val:33 [ 38.730282] BUG: Bad rss-counter state mm:00000000791ca000 type:MM_ANONPAGES val:22 [ 38.767182] ================================================================== [ 38.768158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.769089] Read of size 8 at addr ffff88800c499968 by task sshd/220 [ 38.769845] [ 38.770062] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.770925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.771893] Call Trace: [ 38.772230] [ 38.772514] dump_stack_lvl+0x91/0xf0 [ 38.772997] print_report+0xcc/0x620 [ 38.773473] ? __virt_addr_valid+0x102/0x340 [ 38.774026] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.774634] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.775251] kasan_report+0xbe/0xf0 [ 38.775721] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.776357] vma_interval_tree_remove+0xc75/0xec0 [ 38.776970] vma_prepare+0xc54/0x11a0 [ 38.777443] __split_vma+0x5af/0x950 [ 38.777908] ? __pfx___split_vma+0x10/0x10 [ 38.778424] ? find_held_lock+0x2c/0x110 [ 38.778941] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.779497] ? lock_is_held_type+0x9f/0x120 [ 38.780026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.780663] ? mtree_range_walk+0x632/0x900 [ 38.781210] ? mas_walk+0x5c7/0x7c0 [ 38.781678] do_vmi_munmap+0x1f1/0x2b0 [ 38.782161] mmap_region+0x1f9/0x2660 [ 38.782636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.783140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.783838] ? __pfx_lock_acquire+0x10/0x10 [ 38.784370] ? __pfx_mmap_region+0x10/0x10 [ 38.784898] ? security_mmap_addr+0x7d/0xa0 [ 38.785427] ? get_unmapped_area+0x1f5/0x3f0 [ 38.785978] do_mmap+0x854/0xf00 [ 38.786414] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.786909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.787460] ksys_mmap_pgoff+0x3af/0x500 [ 38.787967] do_syscall_64+0x3f/0x90 [ 38.788455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.789108] RIP: 0033:0x7f1e1dc1bd82 [ 38.789564] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.791696] RSP: 002b:00007ffd072f6fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.792633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e1dc1bd82 [ 38.793473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e1d055000 [ 38.794317] RBP: 00007f1e1d055000 R08: 0000000000000009 R09: 0000000000001000 [ 38.795151] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e201ba7ec0 [ 38.795979] R13: 00007ffd072f6fe0 R14: 00007ffd072f7010 R15: 00007ffd072f7370 [ 38.796839] [ 38.797125] [ 38.797336] Allocated by task 213: [ 38.797760] kasan_save_stack+0x22/0x50 [ 38.798259] kasan_set_track+0x25/0x30 [ 38.798750] __kasan_slab_alloc+0x59/0x70 [ 38.799267] kmem_cache_alloc+0x16b/0x370 [ 38.799772] vm_area_dup+0x20/0x160 [ 38.800227] __split_vma+0x170/0x950 [ 38.800685] split_vma+0xc6/0x110 [ 38.801119] mprotect_fixup+0x8d2/0xb30 [ 38.801616] do_mprotect_pkey+0x87e/0xd40 [ 38.802129] __x64_sys_mprotect+0x78/0xc0 [ 38.802650] do_syscall_64+0x3f/0x90 [ 38.803117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.803761] [ 38.803977] Freed by task 204: [ 38.804385] kasan_save_stack+0x22/0x50 [ 38.804884] kasan_set_track+0x25/0x30 [ 38.805371] kasan_save_free_info+0x2b/0x50 [ 38.805896] __kasan_slab_free+0x10a/0x190 [ 38.806427] kmem_cache_free+0x10d/0x4d0 [ 38.806930] rcu_core+0x8c8/0x2860 [ 38.807372] __do_softirq+0x1b7/0x7d4 [ 38.807848] [ 38.808066] Last potentially related work creation: [ 38.808646] kasan_save_stack+0x22/0x50 [ 38.809151] __kasan_record_aux_stack+0x8e/0xa0 [ 38.809726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.810364] remove_vma+0x139/0x170 [ 38.810809] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.811370] do_vmi_munmap+0x1f1/0x2b0 [ 38.811855] __vm_munmap+0x138/0x3a0 [ 38.812326] __x64_sys_munmap+0x59/0x80 [ 38.812819] do_syscall_64+0x3f/0x90 [ 38.813291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.813929] [ 38.814141] The buggy address belongs to the object at ffff88800c499910 [ 38.814141] which belongs to the cache vm_area_struct of size 168 [ 38.815590] The buggy address is located 88 bytes inside of [ 38.815590] freed 168-byte region [ffff88800c499910, ffff88800c4999b8) [ 38.816983] [ 38.817197] The buggy address belongs to the physical page: [ 38.817840] page:000000008591f7a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc499 [ 38.818926] memcg:ffff88800ca53301 [ 38.819347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.820033] page_type: 0xffffffff() [ 38.820499] raw: 0100000000000200 ffff8880087a0c80 ffffea0000367580 dead000000000003 [ 38.821416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca53301 [ 38.822319] page dumped because: kasan: bad access detected [ 38.822965] [ 38.823178] Memory state around the buggy address: [ 38.823747] ffff88800c499800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.824594] ffff88800c499880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.825440] >ffff88800c499900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.826293] ^ [ 38.827060] ffff88800c499980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.827904] ffff88800c499a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.828808] ================================================================== [ 38.830090] Disabling lock debugging due to kernel taint [ 40.612521] BUG: Bad rss-counter state mm:000000006553156b type:MM_FILEPAGES val:33 [ 40.613431] BUG: Bad rss-counter state mm:000000006553156b type:MM_ANONPAGES val:22 [ 41.108826] BUG: Bad rss-counter state mm:000000003a32ac6d type:MM_FILEPAGES val:33 [ 41.109981] BUG: Bad rss-counter state mm:000000003a32ac6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9943' (ECDSA) to the list of known hosts. 2023/06/20 22:02:01 fuzzer started 2023/06/20 22:02:02 dialing manager at localhost:36067 2023/06/20 22:02:02 checking machine... 2023/06/20 22:02:02 checking revisions... [ 41.831861] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:02:02 testing simple program... [ 41.890100] cgroup: Unknown subsys name 'net' [ 41.932368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:01 Registers: info registers vcpu 0 RAX=0000000000000024 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff88800e3d1710 RSI=ffffffff83695f37 RDI=ffff88800e3d1710 RBP=0000000000000024 RSP=ffff88800fdc7a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000024 R11=0000000000000000 R12=0000000000000024 R13=0000000000000000 R14=ffff88800fdc7d90 R15=ffff88800e3d1640 RIP=ffffffff83695f4a RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7171c30900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc35296000 CR3=000000000947e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5278a562c0 CR3=000000000f2c6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=81d3af0170c276a867491867c6776bac XMM02=ec2efd57dc4c00df000000000011afb0 XMM03=66da54ec3efe160a000000000011b080 XMM04=34d8d8b7313a666e00000000000ae988 XMM05=19e9129bd510f2350000000000131580 XMM06=2d646af8bbc29bf90000000000130758 XMM07=e042d86d42eb936e0000000000121c98 XMM08=66da54ec3efe160a000000000011b080 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000