syzkaller login: [ 31.365195] BUG: Bad rss-counter state mm:0000000088dd1f44 type:MM_FILEPAGES val:33 [ 31.366228] BUG: Bad rss-counter state mm:0000000088dd1f44 type:MM_ANONPAGES val:22 [ 31.536751] ================================================================== [ 31.537736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.538707] Read of size 8 at addr ffff8880159cc968 by task sshd/220 [ 31.539517] [ 31.539837] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.540786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.541867] Call Trace: [ 31.542216] [ 31.542532] dump_stack_lvl+0x91/0xf0 [ 31.543075] print_report+0xcc/0x620 [ 31.543594] ? __virt_addr_valid+0x102/0x340 [ 31.544182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.544864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.545501] kasan_report+0xbe/0xf0 [ 31.545989] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.546615] vma_interval_tree_remove+0xc75/0xec0 [ 31.547217] vma_prepare+0xc54/0x11a0 [ 31.547708] __split_vma+0x5af/0x950 [ 31.548189] ? __pfx___split_vma+0x10/0x10 [ 31.548737] ? find_held_lock+0x2c/0x110 [ 31.549258] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.549844] ? lock_is_held_type+0x9f/0x120 [ 31.550384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.550998] ? mtree_range_walk+0x632/0x900 [ 31.551555] ? mas_walk+0x5c7/0x7c0 [ 31.552034] do_vmi_munmap+0x1f1/0x2b0 [ 31.552554] mmap_region+0x1f9/0x2660 [ 31.553036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.553558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.554270] ? __pfx_lock_acquire+0x10/0x10 [ 31.554806] ? __pfx_mmap_region+0x10/0x10 [ 31.555340] ? security_mmap_addr+0x7d/0xa0 [ 31.555891] ? get_unmapped_area+0x1f5/0x3f0 [ 31.556464] do_mmap+0x854/0xf00 [ 31.556906] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.557403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.557984] ksys_mmap_pgoff+0x3af/0x500 [ 31.558500] do_syscall_64+0x3f/0x90 [ 31.558981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559637] RIP: 0033:0x7f757b0c4d82 [ 31.560107] 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 [ 31.562263] RSP: 002b:00007ffdd9dcd278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.563179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f757b0c4d82 [ 31.564037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f757a4fe000 [ 31.564911] RBP: 00007f757a4fe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.565772] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e69ea3eec0 [ 31.566636] R13: 00007ffdd9dcd290 R14: 00007ffdd9dcd2c0 R15: 00007ffdd9dcd620 [ 31.567507] [ 31.567799] [ 31.568013] Allocated by task 213: [ 31.568459] kasan_save_stack+0x22/0x50 [ 31.568972] kasan_set_track+0x25/0x30 [ 31.569477] __kasan_slab_alloc+0x59/0x70 [ 31.570014] kmem_cache_alloc+0x16b/0x370 [ 31.570538] vm_area_dup+0x20/0x160 [ 31.570998] __split_vma+0x170/0x950 [ 31.571467] split_vma+0xc6/0x110 [ 31.571913] mprotect_fixup+0x8d2/0xb30 [ 31.572447] do_mprotect_pkey+0x87e/0xd40 [ 31.572965] __x64_sys_mprotect+0x78/0xc0 [ 31.573485] do_syscall_64+0x3f/0x90 [ 31.573965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574619] [ 31.574836] Freed by task 210: [ 31.575224] kasan_save_stack+0x22/0x50 [ 31.575729] kasan_set_track+0x25/0x30 [ 31.576223] kasan_save_free_info+0x2b/0x50 [ 31.576767] __kasan_slab_free+0x10a/0x190 [ 31.577301] kmem_cache_free+0x10d/0x4d0 [ 31.577812] rcu_core+0x8c8/0x2860 [ 31.578262] __do_softirq+0x1b7/0x7d4 [ 31.578746] [ 31.578965] Last potentially related work creation: [ 31.579565] kasan_save_stack+0x22/0x50 [ 31.580075] __kasan_record_aux_stack+0x8e/0xa0 [ 31.580672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.581319] remove_vma+0x139/0x170 [ 31.581778] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.582338] do_vmi_munmap+0x1f1/0x2b0 [ 31.582838] __vm_munmap+0x138/0x3a0 [ 31.583308] __x64_sys_munmap+0x59/0x80 [ 31.583810] do_syscall_64+0x3f/0x90 [ 31.584302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.584959] [ 31.585179] The buggy address belongs to the object at ffff8880159cc910 [ 31.585179] which belongs to the cache vm_area_struct of size 168 [ 31.586656] The buggy address is located 88 bytes inside of [ 31.586656] freed 168-byte region [ffff8880159cc910, ffff8880159cc9b8) [ 31.588079] [ 31.588314] The buggy address belongs to the physical page: [ 31.589005] page:000000007f1b35ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159cc [ 31.590116] memcg:ffff88801693f801 [ 31.590549] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.591207] page_type: 0xffffffff() [ 31.591671] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.592626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801693f801 [ 31.593561] page dumped because: kasan: bad access detected [ 31.594238] [ 31.594453] Memory state around the buggy address: [ 31.595043] ffff8880159cc800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.595918] ffff8880159cc880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.596802] >ffff8880159cc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.597662] ^ [ 31.598453] ffff8880159cc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.599311] ffff8880159cca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.600162] ================================================================== [ 31.601147] Disabling lock debugging due to kernel taint [ 33.542134] BUG: Bad rss-counter state mm:00000000cb91e13d type:MM_FILEPAGES val:33 [ 33.543282] BUG: Bad rss-counter state mm:00000000cb91e13d type:MM_ANONPAGES val:22 [ 33.984612] BUG: Bad rss-counter state mm:000000006d6cc104 type:MM_FILEPAGES val:33 [ 33.985632] BUG: Bad rss-counter state mm:000000006d6cc104 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6957' (ECDSA) to the list of known hosts. 2023/06/21 04:05:23 fuzzer started 2023/06/21 04:05:23 dialing manager at localhost:36067 2023/06/21 04:05:23 checking machine... 2023/06/21 04:05:23 checking revisions... [ 34.689009] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:05:23 testing simple program... [ 34.744334] cgroup: Unknown subsys name 'net' [ 34.811523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f2bc4ecd000 CR3=0000000009a1c000 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=00000000000000000000000000000000 XMM01=8a4d12890481858fc7425112bd074733 XMM02=000000000011d528ec2efd57dc4c00df XMM03=0000000000121c901d46e798b6ff4a13 XMM04=145e7e9967bd247c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131a70 XMM06=c34205042a0c0a8000000000001308d8 XMM07=e042d86d42eb936e0000000000121f10 XMM08=1d46e798b6ff4a13000000000011d588 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8180c6a2 RCX=ffffffff860d8201 RDX=1ffff11001f97ee5 RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffffffff8180c6a2 RSP=ffff88800fcbf680 R8 =ffffffff860d825a R9 =ffff88800fcbf710 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000001 R13=0000000000000000 R14=ffff8880141b51c0 R15=0000000000000024 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 00007f12c2691900 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=00007ffd9ffa1000 CR3=000000000cbb8000 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=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