syzkaller login: [ 30.596510] BUG: Bad rss-counter state mm:00000000ee1e0e2f type:MM_FILEPAGES val:33 [ 30.598654] BUG: Bad rss-counter state mm:00000000ee1e0e2f type:MM_ANONPAGES val:22 [ 30.770251] ================================================================== [ 30.771340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.772460] Read of size 8 at addr ffff888019a365c8 by task sshd/218 [ 30.773564] [ 30.773828] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.774805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.775812] Call Trace: [ 30.776143] [ 30.776425] dump_stack_lvl+0x91/0xf0 [ 30.776942] print_report+0xcc/0x620 [ 30.777433] ? __virt_addr_valid+0x102/0x340 [ 30.777987] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778610] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779239] kasan_report+0xbe/0xf0 [ 30.779724] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780347] vma_interval_tree_remove+0xc75/0xec0 [ 30.780963] vma_prepare+0xc54/0x11a0 [ 30.781447] __split_vma+0x5af/0x950 [ 30.781925] ? __pfx___split_vma+0x10/0x10 [ 30.782460] ? find_held_lock+0x2c/0x110 [ 30.782991] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.783562] ? lock_is_held_type+0x9f/0x120 [ 30.784107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784722] ? mtree_range_walk+0x632/0x900 [ 30.785288] ? mas_walk+0x5c7/0x7c0 [ 30.785768] do_vmi_munmap+0x1f1/0x2b0 [ 30.786263] mmap_region+0x1f9/0x2660 [ 30.786747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.787991] ? __pfx_lock_acquire+0x10/0x10 [ 30.788529] ? __pfx_mmap_region+0x10/0x10 [ 30.789084] ? security_mmap_addr+0x7d/0xa0 [ 30.789626] ? get_unmapped_area+0x1f5/0x3f0 [ 30.790179] do_mmap+0x854/0xf00 [ 30.790621] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.791127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.791702] ksys_mmap_pgoff+0x3af/0x500 [ 30.792213] do_syscall_64+0x3f/0x90 [ 30.792697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793358] RIP: 0033:0x7f1a3985fd82 [ 30.793810] 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 [ 30.795937] RSP: 002b:00007fff9dec5b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.796867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a3985fd82 [ 30.797735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a38c99000 [ 30.798592] RBP: 00007f1a38c99000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799435] R10: 0000000000000812 R11: 0000000000000206 R12: 000055635200bb20 [ 30.800289] R13: 00007fff9dec5b90 R14: 00007fff9dec5bc0 R15: 00007fff9dec5f20 [ 30.801224] [ 30.801514] [ 30.801740] Allocated by task 211: [ 30.802191] kasan_save_stack+0x22/0x50 [ 30.802723] kasan_set_track+0x25/0x30 [ 30.803237] __kasan_slab_alloc+0x59/0x70 [ 30.803784] kmem_cache_alloc+0x16b/0x370 [ 30.804323] vm_area_dup+0x20/0x160 [ 30.804790] __split_vma+0x170/0x950 [ 30.805311] split_vma+0xc6/0x110 [ 30.805775] mprotect_fixup+0x8d2/0xb30 [ 30.806308] do_mprotect_pkey+0x87e/0xd40 [ 30.806857] __x64_sys_mprotect+0x78/0xc0 [ 30.807409] do_syscall_64+0x3f/0x90 [ 30.807913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808592] [ 30.808818] Freed by task 211: [ 30.809248] kasan_save_stack+0x22/0x50 [ 30.809774] kasan_set_track+0x25/0x30 [ 30.810295] kasan_save_free_info+0x2b/0x50 [ 30.810858] __kasan_slab_free+0x10a/0x190 [ 30.811417] kmem_cache_free+0x10d/0x4d0 [ 30.811959] rcu_core+0x8c8/0x2860 [ 30.812427] __do_softirq+0x1b7/0x7d4 [ 30.812936] [ 30.813163] Last potentially related work creation: [ 30.813791] kasan_save_stack+0x22/0x50 [ 30.814373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.814976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815654] remove_vma+0x139/0x170 [ 30.816126] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.816711] do_vmi_munmap+0x1f1/0x2b0 [ 30.817227] __vm_munmap+0x138/0x3a0 [ 30.817714] __x64_sys_munmap+0x59/0x80 [ 30.818239] do_syscall_64+0x3f/0x90 [ 30.818740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819418] [ 30.819640] The buggy address belongs to the object at ffff888019a36570 [ 30.819640] which belongs to the cache vm_area_struct of size 168 [ 30.821219] The buggy address is located 88 bytes inside of [ 30.821219] freed 168-byte region [ffff888019a36570, ffff888019a36618) [ 30.822711] [ 30.822940] The buggy address belongs to the physical page: [ 30.823640] page:000000005970952a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a36 [ 30.824798] memcg:ffff8880168de301 [ 30.825272] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.825947] page_type: 0xffffffff() [ 30.826429] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.827396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168de301 [ 30.828358] page dumped because: kasan: bad access detected [ 30.829065] [ 30.829286] Memory state around the buggy address: [ 30.829898] ffff888019a36480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.830801] ffff888019a36500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.831714] >ffff888019a36580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.832617] ^ [ 30.833324] ffff888019a36600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.834232] ffff888019a36680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.835141] ================================================================== [ 30.836124] Disabling lock debugging due to kernel taint [ 33.406251] BUG: Bad rss-counter state mm:000000002659a48a type:MM_FILEPAGES val:33 [ 33.407251] BUG: Bad rss-counter state mm:000000002659a48a type:MM_ANONPAGES val:22 [ 33.901026] BUG: Bad rss-counter state mm:00000000e42713a7 type:MM_FILEPAGES val:33 [ 33.902075] BUG: Bad rss-counter state mm:00000000e42713a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27972' (ECDSA) to the list of known hosts. 2023/06/20 17:36:45 fuzzer started 2023/06/20 17:36:45 dialing manager at localhost:36067 2023/06/20 17:36:45 checking machine... 2023/06/20 17:36:45 checking revisions... [ 34.622113] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:36:45 testing simple program... [ 34.674708] cgroup: Unknown subsys name 'net' [ 34.713798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:36:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81f17561 RDX=ffff888015add1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800c270c98 RSP=ffff88801464f8d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff110028c9f1e R15=0000000000000000 RIP=ffffffff814c086b 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 00007f4002e89900 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=00007f400228eae0 CR3=000000000c6a8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f404456b922993b600000000000ae988 XMM05=2ae5d24b3aeb426b0000000000132238 XMM06=bdf2e299e47b49d50000000000130cb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000006 RBX=0000000000000002 RCX=ffffffff8180c6a1 RDX=000000000000000d RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe000 RSP=ffff88806cf099e0 R8 =ffffffff86138e62 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe034 R13=ffffffff85dfe000 R14=ffffffff85dfe000 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000217 [----APC] 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 00007f95ed816900 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=00007f95ed7db008 CR3=0000000016b1c000 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