syzkaller login: [ 28.855313] BUG: Bad rss-counter state mm:00000000ebb5cabd type:MM_FILEPAGES val:33 [ 28.856519] BUG: Bad rss-counter state mm:00000000ebb5cabd type:MM_ANONPAGES val:22 [ 28.893925] ================================================================== [ 28.895011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.896095] Read of size 8 at addr ffff88800edd24e0 by task sshd/221 [ 28.896986] [ 28.897246] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.898261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.899397] Call Trace: [ 28.899776] [ 28.900109] dump_stack_lvl+0x91/0xf0 [ 28.900686] print_report+0xcc/0x620 [ 28.901254] ? __virt_addr_valid+0x102/0x340 [ 28.901921] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902641] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.903372] kasan_report+0xbe/0xf0 [ 28.903940] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904684] vma_interval_tree_remove+0xc75/0xec0 [ 28.905408] vma_prepare+0xc54/0x11a0 [ 28.906010] __split_vma+0x5af/0x950 [ 28.906498] ? __pfx___split_vma+0x10/0x10 [ 28.907014] ? find_held_lock+0x2c/0x110 [ 28.907527] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.908080] ? lock_is_held_type+0x9f/0x120 [ 28.908610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.909201] ? mtree_range_walk+0x632/0x900 [ 28.909749] ? mas_walk+0x5c7/0x7c0 [ 28.910217] do_vmi_munmap+0x1f1/0x2b0 [ 28.910700] mmap_region+0x1f9/0x2660 [ 28.911172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.911675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.912374] ? __pfx_lock_acquire+0x10/0x10 [ 28.912897] ? __pfx_mmap_region+0x10/0x10 [ 28.913418] ? security_mmap_addr+0x7d/0xa0 [ 28.913959] ? get_unmapped_area+0x1f5/0x3f0 [ 28.914496] do_mmap+0x854/0xf00 [ 28.914928] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.915420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.915969] ksys_mmap_pgoff+0x3af/0x500 [ 28.916469] do_syscall_64+0x3f/0x90 [ 28.916938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917570] RIP: 0033:0x7f3c13758d82 [ 28.918035] 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 [ 28.920123] RSP: 002b:00007fff1ac7b478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.921010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c13758d82 [ 28.921847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c12b92000 [ 28.922838] RBP: 00007f3c12b92000 R08: 0000000000000009 R09: 0000000000001000 [ 28.923668] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566e2618f70 [ 28.924526] R13: 00007fff1ac7b490 R14: 00007fff1ac7b4c0 R15: 00007fff1ac7b820 [ 28.925370] [ 28.925659] [ 28.925878] Allocated by task 214: [ 28.926298] kasan_save_stack+0x22/0x50 [ 28.926794] kasan_set_track+0x25/0x30 [ 28.927282] __kasan_slab_alloc+0x59/0x70 [ 28.927794] kmem_cache_alloc+0x16b/0x370 [ 28.928309] vm_area_dup+0x20/0x160 [ 28.928752] __split_vma+0x170/0x950 [ 28.929211] split_vma+0xc6/0x110 [ 28.929645] mprotect_fixup+0x8d2/0xb30 [ 28.930147] do_mprotect_pkey+0x87e/0xd40 [ 28.930656] __x64_sys_mprotect+0x78/0xc0 [ 28.931171] do_syscall_64+0x3f/0x90 [ 28.931641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932270] [ 28.932481] Freed by task 214: [ 28.932863] kasan_save_stack+0x22/0x50 [ 28.933359] kasan_set_track+0x25/0x30 [ 28.933862] kasan_save_free_info+0x2b/0x50 [ 28.934389] __kasan_slab_free+0x10a/0x190 [ 28.934909] kmem_cache_free+0x10d/0x4d0 [ 28.935410] rcu_core+0x8c8/0x2860 [ 28.935845] __do_softirq+0x1b7/0x7d4 [ 28.936315] [ 28.936528] Last potentially related work creation: [ 28.937098] kasan_save_stack+0x22/0x50 [ 28.937594] __kasan_record_aux_stack+0x8e/0xa0 [ 28.938164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.938797] remove_vma+0x139/0x170 [ 28.939237] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.939780] do_vmi_munmap+0x1f1/0x2b0 [ 28.940263] __vm_munmap+0x138/0x3a0 [ 28.940721] __x64_sys_munmap+0x59/0x80 [ 28.941208] do_syscall_64+0x3f/0x90 [ 28.941673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942310] [ 28.942521] The buggy address belongs to the object at ffff88800edd2488 [ 28.942521] which belongs to the cache vm_area_struct of size 168 [ 28.943976] The buggy address is located 88 bytes inside of [ 28.943976] freed 168-byte region [ffff88800edd2488, ffff88800edd2530) [ 28.945359] [ 28.945573] The buggy address belongs to the physical page: [ 28.946229] page:00000000159014d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd2 [ 28.947302] memcg:ffff888016adf501 [ 28.947724] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.948379] page_type: 0xffffffff() [ 28.948832] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.949762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016adf501 [ 28.950661] page dumped because: kasan: bad access detected [ 28.951309] [ 28.951521] Memory state around the buggy address: [ 28.952094] ffff88800edd2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.952931] ffff88800edd2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.953775] >ffff88800edd2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.954629] ^ [ 28.955371] ffff88800edd2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.956216] ffff88800edd2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.957057] ================================================================== [ 28.958142] Disabling lock debugging due to kernel taint [ 31.438785] BUG: Bad rss-counter state mm:00000000cdef3c67 type:MM_FILEPAGES val:33 [ 31.439805] BUG: Bad rss-counter state mm:00000000cdef3c67 type:MM_ANONPAGES val:22 [ 32.006337] BUG: Bad rss-counter state mm:00000000afa1f452 type:MM_FILEPAGES val:33 [ 32.007530] BUG: Bad rss-counter state mm:00000000afa1f452 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22252' (ECDSA) to the list of known hosts. 2023/06/20 20:51:57 fuzzer started 2023/06/20 20:51:57 dialing manager at localhost:36067 2023/06/20 20:51:57 checking machine... 2023/06/20 20:51:57 checking revisions... [ 32.601647] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:51:57 testing simple program... [ 32.653570] cgroup: Unknown subsys name 'net' [ 32.699990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:51:57 Registers: info registers vcpu 0 RAX=ffffffff84537da7 RBX=0000000000000006 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000017 RDI=ffff88806ce09bd8 RBP=dffffc0000000000 RSP=ffff88806ce09b18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000017 R13=0000000000000000 R14=ffff88806ce09ba8 R15=ffff88800dbbdb80 RIP=ffffffff813ad651 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 00007f9187026900 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=00007f918646d1a0 CR3=000000000d5da000 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=01ba84a424b9f54200000000000ae988 XMM05=2da7227ff2130e8b0000000000132b20 XMM06=c291bd5c70af25b90000000000131910 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110011c6f7c RSP=ffff888008e37bd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88806cf361a0 R13=ffffffff81839bda R14=00000000fffffab8 R15=0000000000000000 RIP=ffffffff812d86f2 RFL=00000047 [---Z-PC] 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=00007fffa99f4000 CR3=00000000094c0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000