syzkaller login: [ 61.085073] BUG: Bad rss-counter state mm:0000000066ebc7cd type:MM_FILEPAGES val:33 [ 61.085724] BUG: Bad rss-counter state mm:0000000066ebc7cd type:MM_ANONPAGES val:22 [ 61.276833] ================================================================== [ 61.277442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.278045] Read of size 8 at addr ffff888016074880 by task sshd/228 [ 61.278970] [ 61.279115] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.279660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.280286] Call Trace: [ 61.280491] [ 61.280678] dump_stack_lvl+0x91/0xf0 [ 61.280996] print_report+0xcc/0x620 [ 61.281312] ? __virt_addr_valid+0x102/0x340 [ 61.281666] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.282074] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.282539] kasan_report+0xbe/0xf0 [ 61.282856] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.283256] vma_interval_tree_remove+0xc75/0xec0 [ 61.283646] vma_prepare+0xc54/0x11a0 [ 61.283972] __split_vma+0x5af/0x950 [ 61.284281] ? __pfx___split_vma+0x10/0x10 [ 61.284626] ? find_held_lock+0x2c/0x110 [ 61.284966] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.285328] ? lock_is_held_type+0x9f/0x120 [ 61.285675] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.286067] ? mtree_range_walk+0x632/0x900 [ 61.290469] ? mas_walk+0x5c7/0x7c0 [ 61.290783] do_vmi_munmap+0x1f1/0x2b0 [ 61.291105] mmap_region+0x1f9/0x2660 [ 61.291420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.291759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.295143] ? __pfx_lock_acquire+0x10/0x10 [ 61.295499] ? __pfx_mmap_region+0x10/0x10 [ 61.295860] ? security_mmap_addr+0x7d/0xa0 [ 61.296211] ? get_unmapped_area+0x1f5/0x3f0 [ 61.296572] do_mmap+0x854/0xf00 [ 61.296864] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.297201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.297569] ksys_mmap_pgoff+0x3af/0x500 [ 61.297897] do_syscall_64+0x3f/0x90 [ 61.298204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.298658] RIP: 0033:0x7fd98cfe0d82 [ 61.298962] 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 [ 61.303972] RSP: 002b:00007ffdfebde628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.304551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd98cfe0d82 [ 61.305107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd98c41a000 [ 61.305652] RBP: 00007fd98c41a000 R08: 0000000000000009 R09: 0000000000001000 [ 61.306197] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643f477eec0 [ 61.318743] R13: 00007ffdfebde640 R14: 00007ffdfebde670 R15: 00007ffdfebde9d0 [ 61.319304] [ 61.319498] [ 61.319639] Allocated by task 219: [ 61.319918] kasan_save_stack+0x22/0x50 [ 61.320259] kasan_set_track+0x25/0x30 [ 61.320581] __kasan_slab_alloc+0x59/0x70 [ 61.320924] kmem_cache_alloc+0x16b/0x370 [ 61.321257] vm_area_dup+0x20/0x160 [ 61.321554] __split_vma+0x170/0x950 [ 61.321857] split_vma+0xc6/0x110 [ 61.322142] mprotect_fixup+0x8d2/0xb30 [ 61.326538] do_mprotect_pkey+0x87e/0xd40 [ 61.326885] __x64_sys_mprotect+0x78/0xc0 [ 61.327234] do_syscall_64+0x3f/0x90 [ 61.327549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.327971] [ 61.328116] Freed by task 19: [ 61.328367] kasan_save_stack+0x22/0x50 [ 61.328696] kasan_set_track+0x25/0x30 [ 61.329021] kasan_save_free_info+0x2b/0x50 [ 61.329366] __kasan_slab_free+0x10a/0x190 [ 61.329711] kmem_cache_free+0x10d/0x4d0 [ 61.330049] rcu_core+0x8c8/0x2860 [ 61.330339] __do_softirq+0x1b7/0x7d4 [ 61.334750] [ 61.334894] Last potentially related work creation: [ 61.338301] kasan_save_stack+0x22/0x50 [ 61.342653] __kasan_record_aux_stack+0x8e/0xa0 [ 61.343035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.343449] remove_vma+0x139/0x170 [ 61.343740] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.344093] do_vmi_munmap+0x1f1/0x2b0 [ 61.344405] __vm_munmap+0x138/0x3a0 [ 61.344703] __x64_sys_munmap+0x59/0x80 [ 61.345027] do_syscall_64+0x3f/0x90 [ 61.345334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.345750] [ 61.345893] The buggy address belongs to the object at ffff888016074828 [ 61.345893] which belongs to the cache vm_area_struct of size 168 [ 61.346930] The buggy address is located 88 bytes inside of [ 61.346930] freed 168-byte region [ffff888016074828, ffff8880160748d0) [ 61.347832] [ 61.347979] The buggy address belongs to the physical page: [ 61.348401] page:00000000ab55c464 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16074 [ 61.349105] memcg:ffff88801909cd01 [ 61.349378] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.349791] page_type: 0xffffffff() [ 61.350081] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.350734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801909cd01 [ 61.351313] page dumped because: kasan: bad access detected [ 61.351736] [ 61.351877] Memory state around the buggy address: [ 61.352258] ffff888016074780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.352813] ffff888016074800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.353369] >ffff888016074880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.353912] ^ [ 61.354183] ffff888016074900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.354807] ffff888016074980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.355363] ================================================================== [ 61.356026] Disabling lock debugging due to kernel taint [ 65.955940] BUG: Bad rss-counter state mm:00000000bd8f0acb type:MM_FILEPAGES val:33 [ 65.956641] BUG: Bad rss-counter state mm:00000000bd8f0acb type:MM_ANONPAGES val:22 [ 66.649782] BUG: Bad rss-counter state mm:0000000012d1cfb6 type:MM_FILEPAGES val:33 [ 66.651891] BUG: Bad rss-counter state mm:0000000012d1cfb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8249' (ECDSA) to the list of known hosts. 2023/06/21 09:58:17 fuzzer started 2023/06/21 09:58:18 dialing manager at localhost:36067 2023/06/21 09:58:18 checking machine... 2023/06/21 09:58:18 checking revisions... [ 67.792873] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:58:18 testing simple program... [ 67.845802] cgroup: Unknown subsys name 'net' [ 67.912210] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 09:58:18 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81765119 RDX=fffff940000d5d77 RSI=0000000000000004 RDI=ffffea00006aebb0 RBP=ffffea00006aeb80 RSP=ffff88801695f918 R8 =0000000000000001 R9 =fffff940000d5d76 R10=ffffea00006aebb3 R11=0000000000000000 R12=ffffea00006aeb80 R13=ffff88800f24c658 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8176511e RFL=00000213 [----A-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 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=00007fa9d3fb6328 CR3=000000000ca1c000 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=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=0000000000000000 RBX=ffff888015a874e8 RCX=0000000000000001 RDX=1ffff11002b50e9d RSI=ffff888015a87830 RDI=ffff888015a874e8 RBP=ffff888015a87830 RSP=ffff888015a87440 R8 =ffffffff86138e90 R9 =ffff888015a87528 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000008 R13=ffff888015a87530 R14=ffff888015a87838 R15=ffff888015a874e8 RIP=ffffffff81130428 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 00007f2593b01900 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=00007f36ff825890 CR3=000000000e780000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000