syzkaller login: [ 71.628412] BUG: Bad rss-counter state mm:00000000e67c416c type:MM_FILEPAGES val:33 [ 71.629702] BUG: Bad rss-counter state mm:00000000e67c416c type:MM_ANONPAGES val:22 [ 71.760091] ================================================================== [ 71.760749] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.761405] Read of size 8 at addr ffff88801ad2aed8 by task sshd/229 [ 71.761944] [ 71.762138] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.762703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.763337] Call Trace: [ 71.763551] [ 71.763745] dump_stack_lvl+0x91/0xf0 [ 71.764234] print_report+0xcc/0x620 [ 71.764595] ? __virt_addr_valid+0x102/0x340 [ 71.764961] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.765361] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.765769] kasan_report+0xbe/0xf0 [ 71.766119] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.766541] vma_interval_tree_remove+0xc75/0xec0 [ 71.766940] vma_prepare+0xc54/0x11a0 [ 71.767286] __split_vma+0x5af/0x950 [ 71.767611] ? __pfx___split_vma+0x10/0x10 [ 71.767960] ? find_held_lock+0x2c/0x110 [ 71.768304] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.768678] ? lock_is_held_type+0x9f/0x120 [ 71.769034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.769434] ? mtree_range_walk+0x632/0x900 [ 71.769797] ? mas_walk+0x5c7/0x7c0 [ 71.770196] do_vmi_munmap+0x1f1/0x2b0 [ 71.770517] mmap_region+0x1f9/0x2660 [ 71.770841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.771173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.771639] ? __pfx_lock_acquire+0x10/0x10 [ 71.771995] ? __pfx_mmap_region+0x10/0x10 [ 71.772345] ? security_mmap_addr+0x7d/0xa0 [ 71.772686] ? get_unmapped_area+0x1f5/0x3f0 [ 71.773057] do_mmap+0x854/0xf00 [ 71.773344] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.773672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.774059] ksys_mmap_pgoff+0x3af/0x500 [ 71.774396] do_syscall_64+0x3f/0x90 [ 71.774721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.775150] RIP: 0033:0x7fadd28cad82 [ 71.775454] 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 [ 71.776833] RSP: 002b:00007ffcca8e2f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.777425] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadd28cad82 [ 71.777981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadd1d04000 [ 71.778586] RBP: 00007fadd1d04000 R08: 0000000000000009 R09: 0000000000001000 [ 71.779127] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c20414ed90 [ 71.779664] R13: 00007ffcca8e2fb0 R14: 00007ffcca8e2fe0 R15: 00007ffcca8e3340 [ 71.780228] [ 71.780423] [ 71.780562] Allocated by task 221: [ 71.780830] kasan_save_stack+0x22/0x50 [ 71.781161] kasan_set_track+0x25/0x30 [ 71.781474] __kasan_slab_alloc+0x59/0x70 [ 71.781802] kmem_cache_alloc+0x16b/0x370 [ 71.782171] vm_area_dup+0x20/0x160 [ 71.782455] __split_vma+0x170/0x950 [ 71.782749] split_vma+0xc6/0x110 [ 71.783031] mprotect_fixup+0x8d2/0xb30 [ 71.783355] do_mprotect_pkey+0x87e/0xd40 [ 71.783687] __x64_sys_mprotect+0x78/0xc0 [ 71.784018] do_syscall_64+0x3f/0x90 [ 71.784323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.784748] [ 71.784890] Freed by task 221: [ 71.785152] kasan_save_stack+0x22/0x50 [ 71.785479] kasan_set_track+0x25/0x30 [ 71.785807] kasan_save_free_info+0x2b/0x50 [ 71.786186] __kasan_slab_free+0x10a/0x190 [ 71.786538] kmem_cache_free+0x10d/0x4d0 [ 71.786860] rcu_core+0x8c8/0x2860 [ 71.787150] __do_softirq+0x1b7/0x7d4 [ 71.787454] [ 71.787588] Last potentially related work creation: [ 71.787958] kasan_save_stack+0x22/0x50 [ 71.788275] __kasan_record_aux_stack+0x8e/0xa0 [ 71.788637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.789050] remove_vma+0x139/0x170 [ 71.789353] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.789714] do_vmi_munmap+0x1f1/0x2b0 [ 71.790034] __vm_munmap+0x138/0x3a0 [ 71.790385] __x64_sys_munmap+0x59/0x80 [ 71.790711] do_syscall_64+0x3f/0x90 [ 71.791014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.791414] [ 71.791549] The buggy address belongs to the object at ffff88801ad2ae80 [ 71.791549] which belongs to the cache vm_area_struct of size 168 [ 71.792469] The buggy address is located 88 bytes inside of [ 71.792469] freed 168-byte region [ffff88801ad2ae80, ffff88801ad2af28) [ 71.793337] [ 71.793474] The buggy address belongs to the physical page: [ 71.793888] page:000000000fd11894 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ad2a [ 71.794610] memcg:ffff888013e4c001 [ 71.794872] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.795282] page_type: 0xffffffff() [ 71.795563] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.796146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e4c001 [ 71.796715] page dumped because: kasan: bad access detected [ 71.797141] [ 71.797276] Memory state around the buggy address: [ 71.797643] ffff88801ad2ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.798243] ffff88801ad2ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 71.798826] >ffff88801ad2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.799363] ^ [ 71.799818] ffff88801ad2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 71.800364] ffff88801ad2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 71.800906] ================================================================== [ 71.801609] Disabling lock debugging due to kernel taint [ 73.261778] BUG: Bad rss-counter state mm:000000003d8dfe3f type:MM_FILEPAGES val:33 [ 73.262511] BUG: Bad rss-counter state mm:000000003d8dfe3f type:MM_ANONPAGES val:22 [ 73.668495] BUG: Bad rss-counter state mm:0000000006c56b72 type:MM_FILEPAGES val:33 [ 73.669240] BUG: Bad rss-counter state mm:0000000006c56b72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37668' (ECDSA) to the list of known hosts. 2023/06/20 08:39:11 fuzzer started 2023/06/20 08:39:11 dialing manager at localhost:44161 2023/06/20 08:39:11 checking machine... 2023/06/20 08:39:11 checking revisions... [ 74.184330] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:39:11 testing simple program... [ 74.223040] cgroup: Unknown subsys name 'net' [ 74.271881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:39:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002cbdf2d RSP=ffff8880165ef958 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000000cc0 R15=ffffffff818470dc RIP=ffffffff812d86c4 RFL=00000212 [----A--] 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 00007f2e74021900 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=00007fff0ed3a000 CR3=000000000cbc2000 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=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 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=ffff888008c58400 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=00007fad7d88f7b0 CR3=0000000017af4000 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=2030313a39333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000