syzkaller login: [ 33.411461] BUG: Bad rss-counter state mm:0000000054575812 type:MM_FILEPAGES val:33 [ 33.412461] BUG: Bad rss-counter state mm:0000000054575812 type:MM_ANONPAGES val:22 [ 33.568357] ================================================================== [ 33.569281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.570213] Read of size 8 at addr ffff88800c9b1798 by task sshd/219 [ 33.570967] [ 33.571184] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.572197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.573186] Call Trace: [ 33.573503] [ 33.573785] dump_stack_lvl+0x91/0xf0 [ 33.574288] print_report+0xcc/0x620 [ 33.574774] ? __virt_addr_valid+0x102/0x340 [ 33.575323] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.575935] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.576565] kasan_report+0xbe/0xf0 [ 33.577038] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.577655] vma_interval_tree_remove+0xc75/0xec0 [ 33.578256] vma_prepare+0xc54/0x11a0 [ 33.578728] __split_vma+0x5af/0x950 [ 33.579190] ? __pfx___split_vma+0x10/0x10 [ 33.579712] ? find_held_lock+0x2c/0x110 [ 33.580231] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.580801] ? lock_is_held_type+0x9f/0x120 [ 33.581331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.581939] ? mtree_range_walk+0x632/0x900 [ 33.582481] ? mas_walk+0x5c7/0x7c0 [ 33.582960] do_vmi_munmap+0x1f1/0x2b0 [ 33.583456] mmap_region+0x1f9/0x2660 [ 33.583935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.584446] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.585174] ? __pfx_lock_acquire+0x10/0x10 [ 33.585704] ? __pfx_mmap_region+0x10/0x10 [ 33.586229] ? security_mmap_addr+0x7d/0xa0 [ 33.586755] ? get_unmapped_area+0x1f5/0x3f0 [ 33.587298] do_mmap+0x854/0xf00 [ 33.587733] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.588228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.588797] ksys_mmap_pgoff+0x3af/0x500 [ 33.589307] do_syscall_64+0x3f/0x90 [ 33.589783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.590421] RIP: 0033:0x7fd90d957d82 [ 33.590877] 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 [ 33.593000] RSP: 002b:00007ffe61c93898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.593894] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd90d957d82 [ 33.594733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd90cd91000 [ 33.595574] RBP: 00007fd90cd91000 R08: 0000000000000009 R09: 0000000000001000 [ 33.596411] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c5da0bf70 [ 33.597256] R13: 00007ffe61c938b0 R14: 00007ffe61c938e0 R15: 00007ffe61c93c40 [ 33.598113] [ 33.598401] [ 33.598616] Allocated by task 212: [ 33.599040] kasan_save_stack+0x22/0x50 [ 33.599539] kasan_set_track+0x25/0x30 [ 33.600028] __kasan_slab_alloc+0x59/0x70 [ 33.600569] kmem_cache_alloc+0x16b/0x370 [ 33.601081] vm_area_dup+0x20/0x160 [ 33.601532] __split_vma+0x170/0x950 [ 33.601991] split_vma+0xc6/0x110 [ 33.602425] mprotect_fixup+0x8d2/0xb30 [ 33.602925] do_mprotect_pkey+0x87e/0xd40 [ 33.603439] __x64_sys_mprotect+0x78/0xc0 [ 33.603953] do_syscall_64+0x3f/0x90 [ 33.604425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.605067] [ 33.605281] Freed by task 212: [ 33.605669] kasan_save_stack+0x22/0x50 [ 33.606166] kasan_set_track+0x25/0x30 [ 33.606655] kasan_save_free_info+0x2b/0x50 [ 33.607184] __kasan_slab_free+0x10a/0x190 [ 33.607717] kmem_cache_free+0x10d/0x4d0 [ 33.608215] rcu_core+0x8c8/0x2860 [ 33.608665] __do_softirq+0x1b7/0x7d4 [ 33.609140] [ 33.609356] Last potentially related work creation: [ 33.609936] kasan_save_stack+0x22/0x50 [ 33.610444] __kasan_record_aux_stack+0x8e/0xa0 [ 33.611019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.611652] remove_vma+0x139/0x170 [ 33.612104] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.612753] do_vmi_munmap+0x1f1/0x2b0 [ 33.613235] __vm_munmap+0x138/0x3a0 [ 33.613697] __x64_sys_munmap+0x59/0x80 [ 33.614187] do_syscall_64+0x3f/0x90 [ 33.614659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.615298] [ 33.615511] Second to last potentially related work creation: [ 33.616186] kasan_save_stack+0x22/0x50 [ 33.616694] __kasan_record_aux_stack+0x8e/0xa0 [ 33.617264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.617898] remove_vma+0x139/0x170 [ 33.618346] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.618900] do_vmi_munmap+0x1f1/0x2b0 [ 33.619382] mmap_region+0x1f9/0x2660 [ 33.619858] do_mmap+0x854/0xf00 [ 33.620287] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.620793] ksys_mmap_pgoff+0x3af/0x500 [ 33.621296] do_syscall_64+0x3f/0x90 [ 33.621766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.622404] [ 33.622617] The buggy address belongs to the object at ffff88800c9b1740 [ 33.622617] which belongs to the cache vm_area_struct of size 168 [ 33.624082] The buggy address is located 88 bytes inside of [ 33.624082] freed 168-byte region [ffff88800c9b1740, ffff88800c9b17e8) [ 33.625481] [ 33.625698] The buggy address belongs to the physical page: [ 33.626355] page:00000000a81bcc3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9b1 [ 33.627420] memcg:ffff888016149901 [ 33.627845] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.628548] page_type: 0xffffffff() [ 33.628997] raw: 0100000000000200 ffff88800879fc80 ffffea00003744c0 dead000000000009 [ 33.629900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016149901 [ 33.630799] page dumped because: kasan: bad access detected [ 33.631449] [ 33.631661] Memory state around the buggy address: [ 33.632231] ffff88800c9b1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.633097] ffff88800c9b1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.633941] >ffff88800c9b1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.634784] ^ [ 33.635276] ffff88800c9b1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.636147] ffff88800c9b1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.637011] ================================================================== [ 33.637942] Disabling lock debugging due to kernel taint [ 35.967846] BUG: Bad rss-counter state mm:0000000087e73176 type:MM_FILEPAGES val:33 [ 35.968903] BUG: Bad rss-counter state mm:0000000087e73176 type:MM_ANONPAGES val:22 [ 36.394175] BUG: Bad rss-counter state mm:00000000b2de50a1 type:MM_FILEPAGES val:33 [ 36.395341] BUG: Bad rss-counter state mm:00000000b2de50a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23136' (ECDSA) to the list of known hosts. 2023/06/20 01:35:19 fuzzer started 2023/06/20 01:35:19 dialing manager at localhost:44161 2023/06/20 01:35:19 checking machine... 2023/06/20 01:35:19 checking revisions... [ 37.100945] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:35:19 testing simple program... [ 37.151478] cgroup: Unknown subsys name 'net' [ 37.195346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=ffffffff812e00e5 RDX=1ffff1100d9e72a2 RSI=0000000000000004 RDI=ffff88806cf39518 RBP=ffff88801a1278e0 RSP=ffff88801a127700 R8 =0000000000000001 R9 =ffffed1003424ed2 R10=0000000000000003 R11=ffff888008c58000 R12=0000000000000001 R13=dffffc0000000000 R14=ffff88806cf39500 R15=dffffc0000000000 RIP=ffffffff812c2494 RFL=00000082 [--S----] 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 00007faa899a5700 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=00007ffc16a07f38 CR3=000000000e784000 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=2038313a35333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a35333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007efe8c13e650 CR3=0000000009770000 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=fae1ad1116e699abee4925286657885d XMM02=ec2efd57dc4c00df000000000011ffa0 XMM03=d8e539fb2a1f41d20000000000120070 XMM04=c8f1d7e97c764d3e00000000000ae988 XMM05=19e9129bd510f23500000000001355b8 XMM06=d8a502dba92590400000000000134420 XMM07=e042d86d42eb936e0000000000124958 XMM08=d8e539fb2a1f41d20000000000120070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000