syzkaller login: [ 28.703961] BUG: Bad rss-counter state mm:00000000ae82a054 type:MM_FILEPAGES val:33 [ 28.705763] BUG: Bad rss-counter state mm:00000000ae82a054 type:MM_ANONPAGES val:22 [ 28.875605] ================================================================== [ 28.876532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.877500] Read of size 8 at addr ffff88800e0c2798 by task sshd/220 [ 28.878270] [ 28.878497] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.879456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.880445] Call Trace: [ 28.880773] [ 28.881089] dump_stack_lvl+0x91/0xf0 [ 28.881592] print_report+0xcc/0x620 [ 28.882077] ? __virt_addr_valid+0x102/0x340 [ 28.882641] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.883258] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.883886] kasan_report+0xbe/0xf0 [ 28.884366] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884997] vma_interval_tree_remove+0xc75/0xec0 [ 28.885605] vma_prepare+0xc54/0x11a0 [ 28.886096] __split_vma+0x5af/0x950 [ 28.886567] ? __pfx___split_vma+0x10/0x10 [ 28.887100] ? find_held_lock+0x2c/0x110 [ 28.887621] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.888196] ? lock_is_held_type+0x9f/0x120 [ 28.888747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.889370] ? mtree_range_walk+0x632/0x900 [ 28.889941] ? mas_walk+0x5c7/0x7c0 [ 28.890418] do_vmi_munmap+0x1f1/0x2b0 [ 28.890925] mmap_region+0x1f9/0x2660 [ 28.891416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.891929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.892643] ? __pfx_lock_acquire+0x10/0x10 [ 28.893200] ? __pfx_mmap_region+0x10/0x10 [ 28.893733] ? security_mmap_addr+0x7d/0xa0 [ 28.894270] ? get_unmapped_area+0x1f5/0x3f0 [ 28.894824] do_mmap+0x854/0xf00 [ 28.895265] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.895771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.896333] ksys_mmap_pgoff+0x3af/0x500 [ 28.896849] do_syscall_64+0x3f/0x90 [ 28.897329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897986] RIP: 0033:0x7f808690cd82 [ 28.898447] 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 [ 28.900590] RSP: 002b:00007ffd5b824298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.901534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f808690cd82 [ 28.902391] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8085d46000 [ 28.903253] RBP: 00007f8085d46000 R08: 0000000000000009 R09: 0000000000001000 [ 28.904115] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572cda50ec0 [ 28.904977] R13: 00007ffd5b8242b0 R14: 00007ffd5b8242e0 R15: 00007ffd5b824640 [ 28.905838] [ 28.906137] [ 28.906351] Allocated by task 212: [ 28.906784] kasan_save_stack+0x22/0x50 [ 28.907312] kasan_set_track+0x25/0x30 [ 28.907809] __kasan_slab_alloc+0x59/0x70 [ 28.908345] kmem_cache_alloc+0x16b/0x370 [ 28.908882] vm_area_dup+0x20/0x160 [ 28.909343] __split_vma+0x170/0x950 [ 28.909816] split_vma+0xc6/0x110 [ 28.910268] mprotect_fixup+0x8d2/0xb30 [ 28.910773] do_mprotect_pkey+0x87e/0xd40 [ 28.911308] __x64_sys_mprotect+0x78/0xc0 [ 28.911843] do_syscall_64+0x3f/0x90 [ 28.912319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.912987] [ 28.913205] Freed by task 212: [ 28.913603] kasan_save_stack+0x22/0x50 [ 28.914115] kasan_set_track+0x25/0x30 [ 28.914606] kasan_save_free_info+0x2b/0x50 [ 28.915150] __kasan_slab_free+0x10a/0x190 [ 28.915684] kmem_cache_free+0x10d/0x4d0 [ 28.916201] rcu_core+0x8c8/0x2860 [ 28.916649] __do_softirq+0x1b7/0x7d4 [ 28.917146] [ 28.917359] Last potentially related work creation: [ 28.917938] kasan_save_stack+0x22/0x50 [ 28.918437] __kasan_record_aux_stack+0x8e/0xa0 [ 28.919010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.919640] remove_vma+0x139/0x170 [ 28.920086] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.920634] do_vmi_munmap+0x1f1/0x2b0 [ 28.921139] __vm_munmap+0x138/0x3a0 [ 28.921599] __x64_sys_munmap+0x59/0x80 [ 28.922099] do_syscall_64+0x3f/0x90 [ 28.922569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923221] [ 28.923439] The buggy address belongs to the object at ffff88800e0c2740 [ 28.923439] which belongs to the cache vm_area_struct of size 168 [ 28.924906] The buggy address is located 88 bytes inside of [ 28.924906] freed 168-byte region [ffff88800e0c2740, ffff88800e0c27e8) [ 28.926303] [ 28.926518] The buggy address belongs to the physical page: [ 28.927170] page:00000000628d40cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c2 [ 28.928240] memcg:ffff88800e090d01 [ 28.928658] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.929364] page_type: 0xffffffff() [ 28.929810] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.930717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e090d01 [ 28.931616] page dumped because: kasan: bad access detected [ 28.932269] [ 28.932485] Memory state around the buggy address: [ 28.933070] ffff88800e0c2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.933914] ffff88800e0c2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.934779] >ffff88800e0c2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.935630] ^ [ 28.936128] ffff88800e0c2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.936992] ffff88800e0c2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.937838] ================================================================== [ 28.938822] Disabling lock debugging due to kernel taint [ 31.613941] BUG: Bad rss-counter state mm:000000006041aab0 type:MM_FILEPAGES val:33 [ 31.615771] BUG: Bad rss-counter state mm:000000006041aab0 type:MM_ANONPAGES val:22 [ 32.123936] BUG: Bad rss-counter state mm:0000000076ed2040 type:MM_FILEPAGES val:33 [ 32.124969] BUG: Bad rss-counter state mm:0000000076ed2040 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30664' (ECDSA) to the list of known hosts. 2023/06/20 14:13:25 fuzzer started 2023/06/20 14:13:26 dialing manager at localhost:36067 2023/06/20 14:13:26 checking machine... 2023/06/20 14:13:26 checking revisions... [ 32.844117] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:13:26 testing simple program... [ 32.898268] cgroup: Unknown subsys name 'net' [ 32.935465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09928 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000282 [--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 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=00007fe52d1f9220 CR3=000000000e5d4000 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=2035323a33313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0aa69 RBX=ffffffff86055348 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff86055348 RSP=ffff88801819f2f0 R8 =ffffffff864bbb4e R9 =ffff88801819f3e8 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fc6bba21900 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=00007fc6bb9e1008 CR3=000000001caaa000 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=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