syzkaller login: [ 30.896975] BUG: Bad rss-counter state mm:000000007a53202a type:MM_FILEPAGES val:33 [ 30.898161] BUG: Bad rss-counter state mm:000000007a53202a type:MM_ANONPAGES val:22 [ 30.934104] ================================================================== [ 30.935154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.936261] Read of size 8 at addr ffff88801a0e8d08 by task sshd/220 [ 30.937049] [ 30.937273] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.938153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.939339] Call Trace: [ 30.939763] [ 30.940052] dump_stack_lvl+0x91/0xf0 [ 30.940578] print_report+0xcc/0x620 [ 30.941138] ? __virt_addr_valid+0x102/0x340 [ 30.941827] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942535] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.943185] kasan_report+0xbe/0xf0 [ 30.943717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944341] vma_interval_tree_remove+0xc75/0xec0 [ 30.945061] vma_prepare+0xc54/0x11a0 [ 30.945701] __split_vma+0x5af/0x950 [ 30.946421] ? __pfx___split_vma+0x10/0x10 [ 30.947055] ? find_held_lock+0x2c/0x110 [ 30.947622] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.948211] ? lock_is_held_type+0x9f/0x120 [ 30.948799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.949414] ? mtree_range_walk+0x632/0x900 [ 30.949973] ? mas_walk+0x5c7/0x7c0 [ 30.950450] do_vmi_munmap+0x1f1/0x2b0 [ 30.950945] mmap_region+0x1f9/0x2660 [ 30.951426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.951938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.952684] ? __pfx_lock_acquire+0x10/0x10 [ 30.953390] ? __pfx_mmap_region+0x10/0x10 [ 30.954093] ? security_mmap_addr+0x7d/0xa0 [ 30.954624] ? get_unmapped_area+0x1f5/0x3f0 [ 30.955176] do_mmap+0x854/0xf00 [ 30.955615] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.956103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.956676] ksys_mmap_pgoff+0x3af/0x500 [ 30.957183] do_syscall_64+0x3f/0x90 [ 30.957662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.958312] RIP: 0033:0x7fbafba30d82 [ 30.958770] 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 [ 30.960913] RSP: 002b:00007ffce949d568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.961823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbafba30d82 [ 30.963004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbafae6a000 [ 30.963844] RBP: 00007fbafae6a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.964704] R10: 0000000000000812 R11: 0000000000000206 R12: 000056412944c980 [ 30.965574] R13: 00007ffce949d580 R14: 00007ffce949d5b0 R15: 00007ffce949d910 [ 30.966431] [ 30.966729] [ 30.966987] Allocated by task 213: [ 30.967437] kasan_save_stack+0x22/0x50 [ 30.967941] kasan_set_track+0x25/0x30 [ 30.968437] __kasan_slab_alloc+0x59/0x70 [ 30.968979] kmem_cache_alloc+0x16b/0x370 [ 30.969502] vm_area_dup+0x20/0x160 [ 30.969966] __split_vma+0x170/0x950 [ 30.970438] split_vma+0xc6/0x110 [ 30.970973] mprotect_fixup+0x8d2/0xb30 [ 30.971552] do_mprotect_pkey+0x87e/0xd40 [ 30.972084] __x64_sys_mprotect+0x78/0xc0 [ 30.972633] do_syscall_64+0x3f/0x90 [ 30.973160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.973804] [ 30.974024] Freed by task 203: [ 30.974421] kasan_save_stack+0x22/0x50 [ 30.974930] kasan_set_track+0x25/0x30 [ 30.975423] kasan_save_free_info+0x2b/0x50 [ 30.975957] __kasan_slab_free+0x10a/0x190 [ 30.976486] kmem_cache_free+0x10d/0x4d0 [ 30.976999] rcu_core+0x8c8/0x2860 [ 30.977443] __do_softirq+0x1b7/0x7d4 [ 30.977968] [ 30.978253] Last potentially related work creation: [ 30.979036] kasan_save_stack+0x22/0x50 [ 30.979590] __kasan_record_aux_stack+0x8e/0xa0 [ 30.980178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.980838] remove_vma+0x139/0x170 [ 30.981293] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.981852] do_vmi_munmap+0x1f1/0x2b0 [ 30.982340] __vm_munmap+0x138/0x3a0 [ 30.982810] __x64_sys_munmap+0x59/0x80 [ 30.983314] do_syscall_64+0x3f/0x90 [ 30.983790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.984441] [ 30.984668] Second to last potentially related work creation: [ 30.985357] kasan_save_stack+0x22/0x50 [ 30.985873] __kasan_record_aux_stack+0x8e/0xa0 [ 30.986493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.987143] remove_vma+0x139/0x170 [ 30.987598] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.988167] do_vmi_munmap+0x1f1/0x2b0 [ 30.988684] mmap_region+0x1f9/0x2660 [ 30.989162] do_mmap+0x854/0xf00 [ 30.989593] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.990166] ksys_mmap_pgoff+0x3af/0x500 [ 30.990667] do_syscall_64+0x3f/0x90 [ 30.991147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991783] [ 30.992000] The buggy address belongs to the object at ffff88801a0e8cb0 [ 30.992000] which belongs to the cache vm_area_struct of size 168 [ 30.993484] The buggy address is located 88 bytes inside of [ 30.993484] freed 168-byte region [ffff88801a0e8cb0, ffff88801a0e8d58) [ 30.995131] [ 30.995346] The buggy address belongs to the physical page: [ 30.996085] page:00000000756f6a26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0e8 [ 30.997207] memcg:ffff88801a0ace01 [ 30.997636] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.998333] page_type: 0xffffffff() [ 30.998785] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f200 000000000000000b [ 30.999702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0ace01 [ 31.000618] page dumped because: kasan: bad access detected [ 31.001281] [ 31.001498] Memory state around the buggy address: [ 31.002235] ffff88801a0e8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.003310] ffff88801a0e8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.004168] >ffff88801a0e8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.005114] ^ [ 31.005564] ffff88801a0e8d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.006418] ffff88801a0e8e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.007271] ================================================================== [ 31.008498] Disabling lock debugging due to kernel taint [ 33.043892] BUG: Bad rss-counter state mm:0000000010e28e1e type:MM_FILEPAGES val:33 [ 33.045167] BUG: Bad rss-counter state mm:0000000010e28e1e type:MM_ANONPAGES val:22 [ 33.608239] BUG: Bad rss-counter state mm:000000003cf018fc type:MM_FILEPAGES val:33 [ 33.609409] BUG: Bad rss-counter state mm:000000003cf018fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39030' (ECDSA) to the list of known hosts. 2023/06/20 15:55:59 fuzzer started 2023/06/20 15:56:00 dialing manager at localhost:36067 2023/06/20 15:56:00 checking machine... 2023/06/20 15:56:00 checking revisions... [ 34.264496] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:56:00 testing simple program... [ 34.317721] cgroup: Unknown subsys name 'net' [ 34.359958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800db43300 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff856d84a0 RSP=ffff88800cf37d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000287 R13=ffffea000036d000 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff84535d1e RFL=00000082 [--S----] 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 00007f5ca0d14900 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=00007f5ca12c9650 CR3=0000000008ed8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd7b4089e8 CR3=0000000005482000 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=00007f345e833510000055d4963c8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000