syzkaller login: [ 45.392823] BUG: Bad rss-counter state mm:000000001d99901d type:MM_FILEPAGES val:33 [ 45.393935] BUG: Bad rss-counter state mm:000000001d99901d type:MM_ANONPAGES val:22 [ 45.569239] ================================================================== [ 45.570365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.571546] Read of size 8 at addr ffff88800c5fb4e0 by task sshd/227 [ 45.572358] [ 45.572590] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.573499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.574549] Call Trace: [ 45.574897] [ 45.575201] dump_stack_lvl+0x91/0xf0 [ 45.575729] print_report+0xcc/0x620 [ 45.576245] ? __virt_addr_valid+0x102/0x340 [ 45.576836] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.577493] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.578170] kasan_report+0xbe/0xf0 [ 45.578685] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.579345] vma_interval_tree_remove+0xc75/0xec0 [ 45.579993] vma_prepare+0xc54/0x11a0 [ 45.580510] __split_vma+0x5af/0x950 [ 45.581020] ? __pfx___split_vma+0x10/0x10 [ 45.581589] ? find_held_lock+0x2c/0x110 [ 45.582141] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.582763] ? lock_is_held_type+0x9f/0x120 [ 45.583340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.584000] ? mtree_range_walk+0x632/0x900 [ 45.584591] ? mas_walk+0x5c7/0x7c0 [ 45.585100] do_vmi_munmap+0x1f1/0x2b0 [ 45.585627] mmap_region+0x1f9/0x2660 [ 45.586140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.586698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.587466] ? __pfx_lock_acquire+0x10/0x10 [ 45.588036] ? __pfx_mmap_region+0x10/0x10 [ 45.588611] ? security_mmap_addr+0x7d/0xa0 [ 45.589185] ? get_unmapped_area+0x1f5/0x3f0 [ 45.589779] do_mmap+0x854/0xf00 [ 45.590267] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.590804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.591406] ksys_mmap_pgoff+0x3af/0x500 [ 45.591953] do_syscall_64+0x3f/0x90 [ 45.592465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.593164] RIP: 0033:0x7f33e2a07d82 [ 45.593651] 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 [ 45.595933] RSP: 002b:00007ffcd7d98f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.596900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33e2a07d82 [ 45.597808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33e1e41000 [ 45.598720] RBP: 00007f33e1e41000 R08: 0000000000000009 R09: 0000000000001000 [ 45.599627] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ebaf70ec0 [ 45.600540] R13: 00007ffcd7d98f80 R14: 00007ffcd7d98fb0 R15: 00007ffcd7d99310 [ 45.601464] [ 45.601784] [ 45.602011] Allocated by task 220: [ 45.602479] kasan_save_stack+0x22/0x50 [ 45.603029] kasan_set_track+0x25/0x30 [ 45.603577] __kasan_slab_alloc+0x59/0x70 [ 45.604147] kmem_cache_alloc+0x16b/0x370 [ 45.604701] vm_area_dup+0x20/0x160 [ 45.605194] __split_vma+0x170/0x950 [ 45.605699] split_vma+0xc6/0x110 [ 45.606183] mprotect_fixup+0x8d2/0xb30 [ 45.606956] do_mprotect_pkey+0x87e/0xd40 [ 45.607598] __x64_sys_mprotect+0x78/0xc0 [ 45.608240] do_syscall_64+0x3f/0x90 [ 45.608825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.609617] [ 45.609883] Freed by task 220: [ 45.610382] kasan_save_stack+0x22/0x50 [ 45.611016] kasan_set_track+0x25/0x30 [ 45.611628] kasan_save_free_info+0x2b/0x50 [ 45.612282] __kasan_slab_free+0x10a/0x190 [ 45.612950] kmem_cache_free+0x10d/0x4d0 [ 45.613585] rcu_core+0x8c8/0x2860 [ 45.614137] __do_softirq+0x1b7/0x7d4 [ 45.614691] [ 45.614911] Last potentially related work creation: [ 45.615503] kasan_save_stack+0x22/0x50 [ 45.616009] __kasan_record_aux_stack+0x8e/0xa0 [ 45.616582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.617228] remove_vma+0x139/0x170 [ 45.617677] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.618240] do_vmi_munmap+0x1f1/0x2b0 [ 45.618734] __vm_munmap+0x138/0x3a0 [ 45.619198] __x64_sys_munmap+0x59/0x80 [ 45.619702] do_syscall_64+0x3f/0x90 [ 45.620179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.620821] [ 45.621039] Second to last potentially related work creation: [ 45.621734] kasan_save_stack+0x22/0x50 [ 45.622240] __kasan_record_aux_stack+0x8e/0xa0 [ 45.622820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.623459] remove_vma+0x139/0x170 [ 45.623915] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.624476] do_vmi_munmap+0x1f1/0x2b0 [ 45.624967] mmap_region+0x1f9/0x2660 [ 45.625453] do_mmap+0x854/0xf00 [ 45.625888] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.626405] ksys_mmap_pgoff+0x3af/0x500 [ 45.626902] do_syscall_64+0x3f/0x90 [ 45.627378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.628028] [ 45.628243] The buggy address belongs to the object at ffff88800c5fb488 [ 45.628243] which belongs to the cache vm_area_struct of size 168 [ 45.629729] The buggy address is located 88 bytes inside of [ 45.629729] freed 168-byte region [ffff88800c5fb488, ffff88800c5fb530) [ 45.631147] [ 45.631369] The buggy address belongs to the physical page: [ 45.632026] page:00000000f6e5c402 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5fb [ 45.633117] memcg:ffff88800d10b101 [ 45.633545] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.634260] page_type: 0xffffffff() [ 45.634712] raw: 0100000000000200 ffff88800879fc80 ffffea00003942c0 dead000000000007 [ 45.635641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d10b101 [ 45.636552] page dumped because: kasan: bad access detected [ 45.637210] [ 45.637426] Memory state around the buggy address: [ 45.638003] ffff88800c5fb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.638895] ffff88800c5fb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.639779] >ffff88800c5fb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.640642] ^ [ 45.641404] ffff88800c5fb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 45.642283] ffff88800c5fb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.643143] ================================================================== [ 45.644425] Disabling lock debugging due to kernel taint [ 47.969822] BUG: Bad rss-counter state mm:00000000f28b99d8 type:MM_FILEPAGES val:33 [ 47.970998] BUG: Bad rss-counter state mm:00000000f28b99d8 type:MM_ANONPAGES val:22 [ 48.451429] BUG: Bad rss-counter state mm:00000000bf5c5b87 type:MM_FILEPAGES val:33 [ 48.452597] BUG: Bad rss-counter state mm:00000000bf5c5b87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43395' (ECDSA) to the list of known hosts. 2023/06/19 19:25:24 fuzzer started 2023/06/19 19:25:24 dialing manager at localhost:44161 2023/06/19 19:25:24 checking machine... 2023/06/19 19:25:24 checking revisions... [ 49.141731] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:25:24 testing simple program... [ 49.197363] cgroup: Unknown subsys name 'net' [ 49.260622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:25:10 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff8107f98e RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800fcafac0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888015909b40 R13=0000000000000000 R14=ffff88801590b100 R15=ffff88801590b1c0 RIP=ffffffff8180f009 RFL=00000046 [---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 00007feb80d19700 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=00007fb8320070b0 CR3=000000000e6fc000 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=2034323a35323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a35323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fbeafa9d450 CR3=000000001039a000 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=ba7a1183cf33d097dd4db2b65ac7f0cd XMM02=000000000011faf8ec2efd57dc4c00df XMM03=0000000000125de059756b01052df5a7 XMM04=a0e389ae773de0b100000000000ae988 XMM05=a195c675f61750c500000000001373c0 XMM06=e8008b1642ea3e600000000000136460 XMM07=e042d86d42eb936e0000000000126060 XMM08=59756b01052df5a7000000000011fb58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000