syzkaller login: [ 60.997923] BUG: Bad rss-counter state mm:00000000b7b600a8 type:MM_FILEPAGES val:33 [ 60.999009] BUG: Bad rss-counter state mm:00000000b7b600a8 type:MM_ANONPAGES val:22 [ 61.111331] ================================================================== [ 61.112044] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.112682] Read of size 8 at addr ffff88800dac5ed8 by task sshd/220 [ 61.113205] [ 61.113363] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.113969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.114655] Call Trace: [ 61.114930] [ 61.115113] dump_stack_lvl+0x91/0xf0 [ 61.115490] print_report+0xcc/0x620 [ 61.116032] ? __virt_addr_valid+0x102/0x340 [ 61.116425] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.116820] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.117228] kasan_report+0xbe/0xf0 [ 61.117538] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.117953] vma_interval_tree_remove+0xc75/0xec0 [ 61.118382] vma_prepare+0xc54/0x11a0 [ 61.118704] __split_vma+0x5af/0x950 [ 61.119066] ? __pfx___split_vma+0x10/0x10 [ 61.119422] ? find_held_lock+0x2c/0x110 [ 61.119773] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.120152] ? lock_is_held_type+0x9f/0x120 [ 61.120523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.120925] ? mtree_range_walk+0x632/0x900 [ 61.121307] ? mas_walk+0x5c7/0x7c0 [ 61.121628] do_vmi_munmap+0x1f1/0x2b0 [ 61.121955] mmap_region+0x1f9/0x2660 [ 61.122262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.122603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.123136] ? __pfx_lock_acquire+0x10/0x10 [ 61.123481] ? __pfx_mmap_region+0x10/0x10 [ 61.123822] ? security_mmap_addr+0x7d/0xa0 [ 61.124174] ? get_unmapped_area+0x1f5/0x3f0 [ 61.124534] do_mmap+0x854/0xf00 [ 61.124824] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.125153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.125524] ksys_mmap_pgoff+0x3af/0x500 [ 61.125862] do_syscall_64+0x3f/0x90 [ 61.126176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.126609] RIP: 0033:0x7f4f6279fd82 [ 61.126948] 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 [ 61.128335] RSP: 002b:00007ffd636af6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.128920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f6279fd82 [ 61.129472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f61bd9000 [ 61.130021] RBP: 00007f4f61bd9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.130576] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651a766dec0 [ 61.131162] R13: 00007ffd636af6f0 R14: 00007ffd636af720 R15: 00007ffd636afa80 [ 61.131731] [ 61.131927] [ 61.132065] Allocated by task 213: [ 61.132340] kasan_save_stack+0x22/0x50 [ 61.132676] kasan_set_track+0x25/0x30 [ 61.133005] __kasan_slab_alloc+0x59/0x70 [ 61.133416] kmem_cache_alloc+0x16b/0x370 [ 61.133873] vm_area_dup+0x20/0x160 [ 61.134294] __split_vma+0x170/0x950 [ 61.134681] split_vma+0xc6/0x110 [ 61.135093] mprotect_fixup+0x8d2/0xb30 [ 61.135502] do_mprotect_pkey+0x87e/0xd40 [ 61.135916] __x64_sys_mprotect+0x78/0xc0 [ 61.136319] do_syscall_64+0x3f/0x90 [ 61.136681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.137133] [ 61.137286] Freed by task 213: [ 61.137567] kasan_save_stack+0x22/0x50 [ 61.137904] kasan_set_track+0x25/0x30 [ 61.138257] kasan_save_free_info+0x2b/0x50 [ 61.138649] __kasan_slab_free+0x10a/0x190 [ 61.139092] kmem_cache_free+0x10d/0x4d0 [ 61.139476] rcu_core+0x8c8/0x2860 [ 61.139787] __do_softirq+0x1b7/0x7d4 [ 61.140134] [ 61.140274] Last potentially related work creation: [ 61.140666] kasan_save_stack+0x22/0x50 [ 61.140986] __kasan_record_aux_stack+0x8e/0xa0 [ 61.141359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.141768] remove_vma+0x139/0x170 [ 61.142059] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.142418] do_vmi_munmap+0x1f1/0x2b0 [ 61.142753] __vm_munmap+0x138/0x3a0 [ 61.143109] __x64_sys_munmap+0x59/0x80 [ 61.143445] do_syscall_64+0x3f/0x90 [ 61.143767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.144205] [ 61.144356] The buggy address belongs to the object at ffff88800dac5e80 [ 61.144356] which belongs to the cache vm_area_struct of size 168 [ 61.145365] The buggy address is located 88 bytes inside of [ 61.145365] freed 168-byte region [ffff88800dac5e80, ffff88800dac5f28) [ 61.146333] [ 61.146482] The buggy address belongs to the physical page: [ 61.147040] page:000000005ad0326f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdac5 [ 61.147757] memcg:ffff88801a4bae01 [ 61.148046] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.148507] page_type: 0xffffffff() [ 61.148832] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.149456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4bae01 [ 61.150062] page dumped because: kasan: bad access detected [ 61.150496] [ 61.150641] Memory state around the buggy address: [ 61.151076] ffff88800dac5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.151630] ffff88800dac5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 61.152184] >ffff88800dac5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.152778] ^ [ 61.153245] ffff88800dac5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.153836] ffff88800dac5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.154389] ================================================================== [ 61.155129] Disabling lock debugging due to kernel taint [ 63.164399] BUG: Bad rss-counter state mm:00000000a45886f6 type:MM_FILEPAGES val:33 [ 63.165165] BUG: Bad rss-counter state mm:00000000a45886f6 type:MM_ANONPAGES val:22 [ 63.598488] BUG: Bad rss-counter state mm:00000000f3b9ee9b type:MM_FILEPAGES val:33 [ 63.599261] BUG: Bad rss-counter state mm:00000000f3b9ee9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63888' (ECDSA) to the list of known hosts. 2023/06/21 09:48:24 fuzzer started 2023/06/21 09:48:24 dialing manager at localhost:36067 2023/06/21 09:48:24 checking machine... 2023/06/21 09:48:24 checking revisions... [ 64.091343] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:48:24 testing simple program... [ 64.120896] cgroup: Unknown subsys name 'net' [ 64.160433] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e2779a0 RCX=0000000000000001 RDX=1ffff11001c4ef34 RSI=ffffffff8186b928 RDI=ffff88800e2779ac RBP=0000000000000005 RSP=ffff88800e2778b8 R8 =0000000000000001 R9 =ffff88800e277918 R10=0000000000038001 R11=0000000000038ddb R12=ffff88800e2779a0 R13=0000000000000000 R14=ffff888015bad1c0 R15=0000000000000dc0 RIP=ffffffff813ad525 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 00007fa7e5030900 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=00007fa7e55e80b0 CR3=000000000cae8000 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=2033323a38343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a38343a3930203132 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=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=00007f88031a81a0 CR3=00000000098b4000 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=b56b8e969fb0cb9a7e4733175cca679e XMM02=ec2efd57dc4c00df000000000011a968 XMM03=3d0fa362c3376ec7000000000011aa38 XMM04=e43e0dbbe0b5771200000000000ae988 XMM05=19e9129bd510f2350000000000131c18 XMM06=e911ea2a97dceeb10000000000130a80 XMM07=e042d86d42eb936e00000000001220c0 XMM08=3d0fa362c3376ec7000000000011aa38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000