syzkaller login: [ 28.759715] BUG: Bad rss-counter state mm:00000000cf776a82 type:MM_FILEPAGES val:33 [ 28.760925] BUG: Bad rss-counter state mm:00000000cf776a82 type:MM_ANONPAGES val:22 [ 28.912734] ================================================================== [ 28.913847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.914992] Read of size 8 at addr ffff88800ef77ed8 by task sshd/222 [ 28.916051] [ 28.916311] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.917337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.918500] Call Trace: [ 28.918825] [ 28.919133] dump_stack_lvl+0x91/0xf0 [ 28.919639] print_report+0xcc/0x620 [ 28.920131] ? __virt_addr_valid+0x102/0x340 [ 28.920693] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.921318] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.921951] kasan_report+0xbe/0xf0 [ 28.922427] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.923064] vma_interval_tree_remove+0xc75/0xec0 [ 28.923662] vma_prepare+0xc54/0x11a0 [ 28.924140] __split_vma+0x5af/0x950 [ 28.924612] ? __pfx___split_vma+0x10/0x10 [ 28.925142] ? find_held_lock+0x2c/0x110 [ 28.925662] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.926225] ? lock_is_held_type+0x9f/0x120 [ 28.926776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.927406] ? mtree_range_walk+0x632/0x900 [ 28.927959] ? mas_walk+0x5c7/0x7c0 [ 28.928440] do_vmi_munmap+0x1f1/0x2b0 [ 28.928932] mmap_region+0x1f9/0x2660 [ 28.929422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.929933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.930667] ? __pfx_lock_acquire+0x10/0x10 [ 28.931236] ? __pfx_mmap_region+0x10/0x10 [ 28.931781] ? security_mmap_addr+0x7d/0xa0 [ 28.932324] ? get_unmapped_area+0x1f5/0x3f0 [ 28.932886] do_mmap+0x854/0xf00 [ 28.933332] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.933840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.934402] ksys_mmap_pgoff+0x3af/0x500 [ 28.934928] do_syscall_64+0x3f/0x90 [ 28.935419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936094] RIP: 0033:0x7f27d064dd82 [ 28.936562] 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 [ 28.938738] RSP: 002b:00007fff6c011238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.939674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27d064dd82 [ 28.940564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27cfa87000 [ 28.941463] RBP: 00007f27cfa87000 R08: 0000000000000009 R09: 0000000000001000 [ 28.942354] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587e25e6ec0 [ 28.943256] R13: 00007fff6c011250 R14: 00007fff6c011280 R15: 00007fff6c0115e0 [ 28.944157] [ 28.944469] [ 28.944694] Allocated by task 214: [ 28.945150] kasan_save_stack+0x22/0x50 [ 28.945671] kasan_set_track+0x25/0x30 [ 28.946190] __kasan_slab_alloc+0x59/0x70 [ 28.946745] kmem_cache_alloc+0x16b/0x370 [ 28.947309] vm_area_dup+0x20/0x160 [ 28.947781] __split_vma+0x170/0x950 [ 28.948267] split_vma+0xc6/0x110 [ 28.948726] mprotect_fixup+0x8d2/0xb30 [ 28.949253] do_mprotect_pkey+0x87e/0xd40 [ 28.949795] __x64_sys_mprotect+0x78/0xc0 [ 28.950340] do_syscall_64+0x3f/0x90 [ 28.950833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951519] [ 28.951739] Freed by task 214: [ 28.952146] kasan_save_stack+0x22/0x50 [ 28.952668] kasan_set_track+0x25/0x30 [ 28.953182] kasan_save_free_info+0x2b/0x50 [ 28.953744] __kasan_slab_free+0x10a/0x190 [ 28.954302] kmem_cache_free+0x10d/0x4d0 [ 28.954850] rcu_core+0x8c8/0x2860 [ 28.955340] __do_softirq+0x1b7/0x7d4 [ 28.955841] [ 28.956065] Last potentially related work creation: [ 28.956683] kasan_save_stack+0x22/0x50 [ 28.957267] __kasan_record_aux_stack+0x8e/0xa0 [ 28.957864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.958539] remove_vma+0x139/0x170 [ 28.959011] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.959593] do_vmi_munmap+0x1f1/0x2b0 [ 28.960102] __vm_munmap+0x138/0x3a0 [ 28.960584] __x64_sys_munmap+0x59/0x80 [ 28.961101] do_syscall_64+0x3f/0x90 [ 28.961600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962271] [ 28.962491] The buggy address belongs to the object at ffff88800ef77e80 [ 28.962491] which belongs to the cache vm_area_struct of size 168 [ 28.964043] The buggy address is located 88 bytes inside of [ 28.964043] freed 168-byte region [ffff88800ef77e80, ffff88800ef77f28) [ 28.965523] [ 28.965807] The buggy address belongs to the physical page: [ 28.966693] page:00000000f82de74a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef77 [ 28.968213] memcg:ffff888016cb2b01 [ 28.968771] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.969653] page_type: 0xffffffff() [ 28.970267] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.971552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cb2b01 [ 28.972836] page dumped because: kasan: bad access detected [ 28.973791] [ 28.974098] Memory state around the buggy address: [ 28.974904] ffff88800ef77d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.976079] ffff88800ef77e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.977279] >ffff88800ef77e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.978467] ^ [ 28.979481] ffff88800ef77f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.980687] ffff88800ef77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.981885] ================================================================== [ 28.983157] Disabling lock debugging due to kernel taint [ 30.969719] BUG: Bad rss-counter state mm:00000000a53c18f0 type:MM_FILEPAGES val:33 [ 30.970958] BUG: Bad rss-counter state mm:00000000a53c18f0 type:MM_ANONPAGES val:22 [ 31.441696] BUG: Bad rss-counter state mm:000000000aab82be type:MM_FILEPAGES val:33 [ 31.442877] BUG: Bad rss-counter state mm:000000000aab82be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31150' (ECDSA) to the list of known hosts. 2023/06/20 11:47:53 fuzzer started 2023/06/20 11:47:53 dialing manager at localhost:36067 2023/06/20 11:47:53 checking machine... 2023/06/20 11:47:53 checking revisions... [ 32.146779] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:47:53 testing simple program... [ 32.189310] cgroup: Unknown subsys name 'net' [ 32.227817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:47:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88800f0c7a40 RDX=1ffff11001e18f3f RSI=ffff88800f0c7a38 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff88800f0c7950 R8 =0000000000000001 R9 =ffff88800f0c79e0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff8880145f3680 R15=ffff8880095ef4c0 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007fad7d16f900 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=00007ffe57205ff8 CR3=000000000d956000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=1ffff1100d9e139e RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09cd0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88800dc91738 R15=0000000000000000 RIP=ffffffff8180f036 RFL=00000002 [-------] 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 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=00007ffaa2db1898 CR3=0000000019c92000 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=2032353a37343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37343a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000