syzkaller login: [ 30.356954] BUG: Bad rss-counter state mm:000000008b2f2f21 type:MM_FILEPAGES val:33 [ 30.358350] BUG: Bad rss-counter state mm:000000008b2f2f21 type:MM_ANONPAGES val:22 [ 30.521239] ================================================================== [ 30.522149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.523117] Read of size 8 at addr ffff8880167c7d08 by task sshd/220 [ 30.523902] [ 30.524127] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.525111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.526103] Call Trace: [ 30.526419] [ 30.526722] dump_stack_lvl+0x91/0xf0 [ 30.527219] print_report+0xcc/0x620 [ 30.527699] ? __virt_addr_valid+0x102/0x340 [ 30.528258] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.528876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.529490] kasan_report+0xbe/0xf0 [ 30.529977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.530627] vma_interval_tree_remove+0xc75/0xec0 [ 30.531236] vma_prepare+0xc54/0x11a0 [ 30.531721] __split_vma+0x5af/0x950 [ 30.532196] ? __pfx___split_vma+0x10/0x10 [ 30.532733] ? find_held_lock+0x2c/0x110 [ 30.533257] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.533827] ? lock_is_held_type+0x9f/0x120 [ 30.534373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.535000] ? mtree_range_walk+0x632/0x900 [ 30.535562] ? mas_walk+0x5c7/0x7c0 [ 30.536041] do_vmi_munmap+0x1f1/0x2b0 [ 30.536542] mmap_region+0x1f9/0x2660 [ 30.537036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.537560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.538288] ? __pfx_lock_acquire+0x10/0x10 [ 30.538852] ? __pfx_mmap_region+0x10/0x10 [ 30.539389] ? security_mmap_addr+0x7d/0xa0 [ 30.539923] ? get_unmapped_area+0x1f5/0x3f0 [ 30.540477] do_mmap+0x854/0xf00 [ 30.540922] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.541422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.541996] ksys_mmap_pgoff+0x3af/0x500 [ 30.542528] do_syscall_64+0x3f/0x90 [ 30.543021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543672] RIP: 0033:0x7f84ff1fdd82 [ 30.544132] 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 [ 30.546277] RSP: 002b:00007ffcda591ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.547192] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84ff1fdd82 [ 30.548041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84fe637000 [ 30.548899] RBP: 00007f84fe637000 R08: 0000000000000009 R09: 0000000000001000 [ 30.549751] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c695d2cec0 [ 30.550625] R13: 00007ffcda591ee0 R14: 00007ffcda591f10 R15: 00007ffcda592270 [ 30.551485] [ 30.551784] [ 30.552000] Allocated by task 213: [ 30.552428] kasan_save_stack+0x22/0x50 [ 30.552931] kasan_set_track+0x25/0x30 [ 30.553428] __kasan_slab_alloc+0x59/0x70 [ 30.553951] kmem_cache_alloc+0x16b/0x370 [ 30.554478] vm_area_dup+0x20/0x160 [ 30.554940] __split_vma+0x170/0x950 [ 30.555412] split_vma+0xc6/0x110 [ 30.555856] mprotect_fixup+0x8d2/0xb30 [ 30.556364] do_mprotect_pkey+0x87e/0xd40 [ 30.556899] __x64_sys_mprotect+0x78/0xc0 [ 30.557422] do_syscall_64+0x3f/0x90 [ 30.557906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.558572] [ 30.558787] Freed by task 213: [ 30.559182] kasan_save_stack+0x22/0x50 [ 30.559695] kasan_set_track+0x25/0x30 [ 30.560190] kasan_save_free_info+0x2b/0x50 [ 30.560724] __kasan_slab_free+0x10a/0x190 [ 30.561263] kmem_cache_free+0x10d/0x4d0 [ 30.561785] rcu_core+0x8c8/0x2860 [ 30.562240] __do_softirq+0x1b7/0x7d4 [ 30.562741] [ 30.562964] Last potentially related work creation: [ 30.563555] kasan_save_stack+0x22/0x50 [ 30.564065] __kasan_record_aux_stack+0x8e/0xa0 [ 30.564649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.565300] remove_vma+0x139/0x170 [ 30.565755] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.566320] do_vmi_munmap+0x1f1/0x2b0 [ 30.566828] __vm_munmap+0x138/0x3a0 [ 30.567305] __x64_sys_munmap+0x59/0x80 [ 30.567812] do_syscall_64+0x3f/0x90 [ 30.568292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568944] [ 30.569164] The buggy address belongs to the object at ffff8880167c7cb0 [ 30.569164] which belongs to the cache vm_area_struct of size 168 [ 30.570662] The buggy address is located 88 bytes inside of [ 30.570662] freed 168-byte region [ffff8880167c7cb0, ffff8880167c7d58) [ 30.572084] [ 30.572300] The buggy address belongs to the physical page: [ 30.572964] page:000000004da46b84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167c7 [ 30.574061] memcg:ffff88800fc56a01 [ 30.574499] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.575158] page_type: 0xffffffff() [ 30.575617] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.576564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc56a01 [ 30.577484] page dumped because: kasan: bad access detected [ 30.578159] [ 30.578378] Memory state around the buggy address: [ 30.578979] ffff8880167c7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.579845] ffff8880167c7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.580727] >ffff8880167c7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.581583] ^ [ 30.582028] ffff8880167c7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.582901] ffff8880167c7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.583761] ================================================================== [ 30.584696] Disabling lock debugging due to kernel taint [ 32.812977] BUG: Bad rss-counter state mm:0000000089cc947a type:MM_FILEPAGES val:33 [ 32.814172] BUG: Bad rss-counter state mm:0000000089cc947a type:MM_ANONPAGES val:22 [ 33.179519] BUG: Bad rss-counter state mm:00000000d211f99d type:MM_FILEPAGES val:33 [ 33.180762] BUG: Bad rss-counter state mm:00000000d211f99d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58350' (ECDSA) to the list of known hosts. 2023/06/20 15:36:04 fuzzer started 2023/06/20 15:36:04 dialing manager at localhost:36067 2023/06/20 15:36:04 checking machine... 2023/06/20 15:36:04 checking revisions... [ 33.905034] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:36:04 testing simple program... [ 33.956256] cgroup: Unknown subsys name 'net' [ 34.009270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:04 Registers: info registers vcpu 0 RAX=ffffffff84537da7 RBX=0000000000000007 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000c RDI=ffff888008d9fac8 RBP=dffffc0000000000 RSP=ffff888008d9fa00 R8 =ffffffff860743f8 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000000128 R12=0000000000000008 R13=0000000000000000 R14=ffff888008d9fa90 R15=ffff888013e56480 RIP=ffffffff813ad633 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 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=00007f727ca230b0 CR3=000000000e7f4000 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=36333a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007fca383585c0 CR3=000000000cec6000 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=81077ef30b9ec8983c4c1c8db2ddc03b XMM02=000000000011a070ec2efd57dc4c00df XMM03=00000000001214d84763299c86757b7b XMM04=956e2ebbe18a24d400000000000ae988 XMM05=02524a99869c900000000000001320e0 XMM06=4fda316b135da52b0000000000131180 XMM07=e042d86d42eb936e0000000000121758 XMM08=4763299c86757b7b000000000011a0d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000