syzkaller login: [ 30.617165] BUG: Bad rss-counter state mm:00000000d3d17975 type:MM_FILEPAGES val:33 [ 30.618505] BUG: Bad rss-counter state mm:00000000d3d17975 type:MM_ANONPAGES val:22 [ 30.779786] ================================================================== [ 30.780817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.781739] Read of size 8 at addr ffff88800ebad3f8 by task sshd/221 [ 30.782639] [ 30.782857] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.783715] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.784706] Call Trace: [ 30.785023] [ 30.785302] dump_stack_lvl+0x91/0xf0 [ 30.785792] print_report+0xcc/0x620 [ 30.786276] ? __virt_addr_valid+0x102/0x340 [ 30.786828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788071] kasan_report+0xbe/0xf0 [ 30.788550] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789163] vma_interval_tree_remove+0xc75/0xec0 [ 30.789766] vma_prepare+0xc54/0x11a0 [ 30.790241] __split_vma+0x5af/0x950 [ 30.790706] ? __pfx___split_vma+0x10/0x10 [ 30.791223] ? find_held_lock+0x2c/0x110 [ 30.791740] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.792299] ? find_held_lock+0x2c/0x110 [ 30.792818] ? lock_is_held_type+0x9f/0x120 [ 30.793353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.793960] ? mtree_range_walk+0x632/0x900 [ 30.794510] ? mas_walk+0x5c7/0x7c0 [ 30.794984] do_vmi_munmap+0x1f1/0x2b0 [ 30.795479] mmap_region+0x1f9/0x2660 [ 30.795952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.796470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.797190] ? __pfx_lock_acquire+0x10/0x10 [ 30.797728] ? __pfx_mmap_region+0x10/0x10 [ 30.798262] ? security_mmap_addr+0x7d/0xa0 [ 30.798812] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799361] do_mmap+0x854/0xf00 [ 30.799806] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800878] ksys_mmap_pgoff+0x3af/0x500 [ 30.801377] do_syscall_64+0x3f/0x90 [ 30.801859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802503] RIP: 0033:0x7eff8cae0d82 [ 30.802954] 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 [ 30.805067] RSP: 002b:00007ffd146d6d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.805970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff8cae0d82 [ 30.806805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff8bf1a000 [ 30.807639] RBP: 00007eff8bf1a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808498] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e746f50d90 [ 30.809336] R13: 00007ffd146d6da0 R14: 00007ffd146d6dd0 R15: 00007ffd146d7130 [ 30.810182] [ 30.810475] [ 30.810687] Allocated by task 213: [ 30.811109] kasan_save_stack+0x22/0x50 [ 30.811604] kasan_set_track+0x25/0x30 [ 30.812107] __kasan_slab_alloc+0x59/0x70 [ 30.812638] kmem_cache_alloc+0x16b/0x370 [ 30.813150] vm_area_dup+0x20/0x160 [ 30.813601] __split_vma+0x170/0x950 [ 30.814062] split_vma+0xc6/0x110 [ 30.814494] mprotect_fixup+0x8d2/0xb30 [ 30.814992] do_mprotect_pkey+0x87e/0xd40 [ 30.815508] __x64_sys_mprotect+0x78/0xc0 [ 30.816063] do_syscall_64+0x3f/0x90 [ 30.816534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817166] [ 30.817378] Freed by task 210: [ 30.817766] kasan_save_stack+0x22/0x50 [ 30.818263] kasan_set_track+0x25/0x30 [ 30.818756] kasan_save_free_info+0x2b/0x50 [ 30.819277] __kasan_slab_free+0x10a/0x190 [ 30.819799] kmem_cache_free+0x10d/0x4d0 [ 30.820312] rcu_core+0x8c8/0x2860 [ 30.820747] __do_softirq+0x1b7/0x7d4 [ 30.821222] [ 30.821438] Last potentially related work creation: [ 30.822016] kasan_save_stack+0x22/0x50 [ 30.822516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.823122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823761] remove_vma+0x139/0x170 [ 30.824232] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824787] do_vmi_munmap+0x1f1/0x2b0 [ 30.825265] __vm_munmap+0x138/0x3a0 [ 30.825725] __x64_sys_munmap+0x59/0x80 [ 30.826224] do_syscall_64+0x3f/0x90 [ 30.826695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827330] [ 30.827546] The buggy address belongs to the object at ffff88800ebad3a0 [ 30.827546] which belongs to the cache vm_area_struct of size 168 [ 30.828995] The buggy address is located 88 bytes inside of [ 30.828995] freed 168-byte region [ffff88800ebad3a0, ffff88800ebad448) [ 30.830384] [ 30.830608] The buggy address belongs to the physical page: [ 30.831268] page:0000000039c06791 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebad [ 30.832345] memcg:ffff88800c68f401 [ 30.832768] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833401] page_type: 0xffffffff() [ 30.833848] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.834753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c68f401 [ 30.835650] page dumped because: kasan: bad access detected [ 30.836314] [ 30.836530] Memory state around the buggy address: [ 30.837098] ffff88800ebad280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.837950] ffff88800ebad300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.838789] >ffff88800ebad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.839629] ^ [ 30.840472] ffff88800ebad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.841323] ffff88800ebad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.842162] ================================================================== [ 30.843081] Disabling lock debugging due to kernel taint [ 33.036935] BUG: Bad rss-counter state mm:000000003387d9d4 type:MM_FILEPAGES val:33 [ 33.038001] BUG: Bad rss-counter state mm:000000003387d9d4 type:MM_ANONPAGES val:22 [ 33.409576] BUG: Bad rss-counter state mm:00000000051784b3 type:MM_FILEPAGES val:33 [ 33.410931] BUG: Bad rss-counter state mm:00000000051784b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41137' (ECDSA) to the list of known hosts. 2023/06/20 14:05:15 fuzzer started 2023/06/20 14:05:15 dialing manager at localhost:36067 2023/06/20 14:05:15 checking machine... 2023/06/20 14:05:15 checking revisions... [ 34.067678] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:05:15 testing simple program... [ 34.129132] cgroup: Unknown subsys name 'net' [ 34.183496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:05:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018f4fe70 RCX=0000000000000000 RDX=1ffff110028bb701 RSI=ffffffff844a6f85 RDI=ffff8880145db808 RBP=ffff88800eb6ca00 RSP=ffff888018f4f798 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88800a3bed98 R12=ffff8880145db7c0 R13=ffff88800eb6da0c R14=ffff88800eb6da00 R15=0000000000000000 RIP=ffffffff844a6fe4 RFL=00000212 [----A--] 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 00007f53c919c900 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=00007f53c916b008 CR3=0000000016e00000 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=00000000000000000000000000000000 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=0000000000000001 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=00007f77771d3f00 CR3=000000000967a000 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=45951a9e69398ab19d4e08b84fe05208 XMM02=000000000011d7b0ec2efd57dc4c00df XMM03=0000000000121e784747776fe49aa41a XMM04=2045755b5ee493c000000000000ae988 XMM05=d91203560150881b0000000000132898 XMM06=c291bd5c70af25b90000000000131cc0 XMM07=e042d86d42eb936e00000000001220f8 XMM08=4747776fe49aa41a000000000011d810 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000