syzkaller login: [ 61.275418] BUG: Bad rss-counter state mm:000000008d68ac96 type:MM_FILEPAGES val:33 [ 61.276075] BUG: Bad rss-counter state mm:000000008d68ac96 type:MM_ANONPAGES val:22 [ 61.448759] ================================================================== [ 61.449690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.450646] Read of size 8 at addr ffff88800d98b3f8 by task sshd/221 [ 61.451416] [ 61.451756] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.452789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.453759] Call Trace: [ 61.454130] [ 61.454418] dump_stack_lvl+0x91/0xf0 [ 61.454909] print_report+0xcc/0x620 [ 61.455393] ? __virt_addr_valid+0x102/0x340 [ 61.455959] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.456577] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.457194] kasan_report+0xbe/0xf0 [ 61.457674] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.458316] vma_interval_tree_remove+0xc75/0xec0 [ 61.458922] vma_prepare+0xc54/0x11a0 [ 61.459429] __split_vma+0x5af/0x950 [ 61.459926] ? __pfx___split_vma+0x10/0x10 [ 61.460478] ? find_held_lock+0x2c/0x110 [ 61.461027] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.461622] ? lock_is_held_type+0x9f/0x120 [ 61.462207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.462851] ? mtree_range_walk+0x632/0x900 [ 61.463436] ? mas_walk+0x5c7/0x7c0 [ 61.463939] do_vmi_munmap+0x1f1/0x2b0 [ 61.464464] mmap_region+0x1f9/0x2660 [ 61.464968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.465510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.466269] ? __pfx_lock_acquire+0x10/0x10 [ 61.466834] ? __pfx_mmap_region+0x10/0x10 [ 61.467393] ? security_mmap_addr+0x7d/0xa0 [ 61.467951] ? get_unmapped_area+0x1f5/0x3f0 [ 61.468532] do_mmap+0x854/0xf00 [ 61.468995] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.469519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.470117] ksys_mmap_pgoff+0x3af/0x500 [ 61.470660] do_syscall_64+0x3f/0x90 [ 61.471167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.471935] RIP: 0033:0x7f913fb01d82 [ 61.472552] 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 [ 61.475320] RSP: 002b:00007ffcafe1f6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.476283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f913fb01d82 [ 61.477187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f913ef3b000 [ 61.478097] RBP: 00007f913ef3b000 R08: 0000000000000009 R09: 0000000000001000 [ 61.479007] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4ff000ec0 [ 61.479912] R13: 00007ffcafe1f6f0 R14: 00007ffcafe1f720 R15: 00007ffcafe1fa80 [ 61.480816] [ 61.481125] [ 61.481348] Allocated by task 213: [ 61.481803] kasan_save_stack+0x22/0x50 [ 61.482343] kasan_set_track+0x25/0x30 [ 61.482861] __kasan_slab_alloc+0x59/0x70 [ 61.483411] kmem_cache_alloc+0x16b/0x370 [ 61.483955] vm_area_dup+0x20/0x160 [ 61.484435] __split_vma+0x170/0x950 [ 61.484930] split_vma+0xc6/0x110 [ 61.485395] mprotect_fixup+0x8d2/0xb30 [ 61.485925] do_mprotect_pkey+0x87e/0xd40 [ 61.486505] __x64_sys_mprotect+0x78/0xc0 [ 61.487058] do_syscall_64+0x3f/0x90 [ 61.487558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.488245] [ 61.488470] Freed by task 19: [ 61.488874] kasan_save_stack+0x22/0x50 [ 61.489405] kasan_set_track+0x25/0x30 [ 61.489926] kasan_save_free_info+0x2b/0x50 [ 61.490505] __kasan_slab_free+0x10a/0x190 [ 61.491071] kmem_cache_free+0x10d/0x4d0 [ 61.491602] rcu_core+0x8c8/0x2860 [ 61.492071] __do_softirq+0x1b7/0x7d4 [ 61.492581] [ 61.492887] Last potentially related work creation: [ 61.493504] kasan_save_stack+0x22/0x50 [ 61.494059] __kasan_record_aux_stack+0x8e/0xa0 [ 61.494670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.495356] remove_vma+0x139/0x170 [ 61.495832] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.496429] do_vmi_munmap+0x1f1/0x2b0 [ 61.496941] __vm_munmap+0x138/0x3a0 [ 61.497440] __x64_sys_munmap+0x59/0x80 [ 61.497961] do_syscall_64+0x3f/0x90 [ 61.498469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.499140] [ 61.499367] The buggy address belongs to the object at ffff88800d98b3a0 [ 61.499367] which belongs to the cache vm_area_struct of size 168 [ 61.500938] The buggy address is located 88 bytes inside of [ 61.500938] freed 168-byte region [ffff88800d98b3a0, ffff88800d98b448) [ 61.502445] [ 61.502690] The buggy address belongs to the physical page: [ 61.503500] page:00000000ba48f2af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd98b [ 61.504639] memcg:ffff88800f7f4f01 [ 61.505086] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.505766] page_type: 0xffffffff() [ 61.506259] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.507244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7f4f01 [ 61.508196] page dumped because: kasan: bad access detected [ 61.508890] [ 61.509116] Memory state around the buggy address: [ 61.509726] ffff88800d98b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 61.510648] ffff88800d98b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 61.511561] >ffff88800d98b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.512464] ^ [ 61.513364] ffff88800d98b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.514284] ffff88800d98b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.515181] ================================================================== [ 61.516191] Disabling lock debugging due to kernel taint [ 64.028585] BUG: Bad rss-counter state mm:000000009259d879 type:MM_FILEPAGES val:33 [ 64.029537] BUG: Bad rss-counter state mm:000000009259d879 type:MM_ANONPAGES val:22 [ 64.517617] BUG: Bad rss-counter state mm:0000000029e6bd8e type:MM_FILEPAGES val:33 [ 64.518575] BUG: Bad rss-counter state mm:0000000029e6bd8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9871' (ECDSA) to the list of known hosts. 2023/06/20 03:22:59 fuzzer started 2023/06/20 03:22:59 dialing manager at localhost:44161 2023/06/20 03:22:59 checking machine... 2023/06/20 03:22:59 checking revisions... [ 65.244083] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:22:59 testing simple program... [ 65.300321] cgroup: Unknown subsys name 'net' [ 65.341489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:22:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f7345aa2d80 CR3=000000000cde4000 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=a9adb7b7f7c2e1b6794872ffa703b56a XMM02=ec2efd57dc4c00df0000000000123ff8 XMM03=066cebe77a603a0300000000001240c8 XMM04=56b04701d4b1c5b800000000000ae988 XMM05=e4cb8bb95a7664b60000000000138958 XMM06=0d5e623e7a969cd300000000001377c0 XMM07=e042d86d42eb936e0000000000128a20 XMM08=066cebe77a603a0300000000001240c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186bd44 RBX=ffffffff85e03a00 RCX=ffffffff8186bd0a RDX=0000000000000000 RSI=ffffffff86141cfc RDI=ffffffff85e039f4 RBP=ffffffff85e039f4 RSP=ffff8880158679e8 R8 =ffffffff86141cfc R9 =ffff888015867ae0 R10=0000000000038001 R11=0000000000022988 R12=ffffffff85e039fc R13=ffffffff85e039f4 R14=ffffffff85e039f4 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000287 [--S--PC] 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 00007efcd0724900 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=00007ffec8f53000 CR3=000000000db98000 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=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