syzkaller login: [ 31.930225] BUG: Bad rss-counter state mm:000000002ad783ce type:MM_FILEPAGES val:33 [ 31.931668] BUG: Bad rss-counter state mm:000000002ad783ce type:MM_ANONPAGES val:22 [ 32.090687] ================================================================== [ 32.091673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.092661] Read of size 8 at addr ffff88800df1c228 by task sshd/221 [ 32.093567] [ 32.093804] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.094712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.095765] Call Trace: [ 32.096094] [ 32.096386] dump_stack_lvl+0x91/0xf0 [ 32.096924] print_report+0xcc/0x620 [ 32.097428] ? __virt_addr_valid+0x102/0x340 [ 32.098014] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.098663] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.099306] kasan_report+0xbe/0xf0 [ 32.099828] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.100475] vma_interval_tree_remove+0xc75/0xec0 [ 32.101133] vma_prepare+0xc54/0x11a0 [ 32.101650] __split_vma+0x5af/0x950 [ 32.102142] ? __pfx___split_vma+0x10/0x10 [ 32.102703] ? find_held_lock+0x2c/0x110 [ 32.103244] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.103858] ? lock_is_held_type+0x9f/0x120 [ 32.104419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.105053] ? mtree_range_walk+0x632/0x900 [ 32.105624] ? mas_walk+0x5c7/0x7c0 [ 32.106115] do_vmi_munmap+0x1f1/0x2b0 [ 32.106624] mmap_region+0x1f9/0x2660 [ 32.107121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.107661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.108397] ? __pfx_lock_acquire+0x10/0x10 [ 32.108947] ? __pfx_mmap_region+0x10/0x10 [ 32.109494] ? security_mmap_addr+0x7d/0xa0 [ 32.110043] ? get_unmapped_area+0x1f5/0x3f0 [ 32.110607] do_mmap+0x854/0xf00 [ 32.111062] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.111573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.112177] ksys_mmap_pgoff+0x3af/0x500 [ 32.112702] do_syscall_64+0x3f/0x90 [ 32.113195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.113861] RIP: 0033:0x7f623efd1d82 [ 32.114334] 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 [ 32.116546] RSP: 002b:00007ffef2a06de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.117494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f623efd1d82 [ 32.118365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f623e40b000 [ 32.119249] RBP: 00007f623e40b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.120130] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581dcc0bd90 [ 32.121009] R13: 00007ffef2a06e00 R14: 00007ffef2a06e30 R15: 00007ffef2a07190 [ 32.121896] [ 32.122196] [ 32.122418] Allocated by task 214: [ 32.122860] kasan_save_stack+0x22/0x50 [ 32.123381] kasan_set_track+0x25/0x30 [ 32.123908] __kasan_slab_alloc+0x59/0x70 [ 32.124449] kmem_cache_alloc+0x16b/0x370 [ 32.124983] vm_area_dup+0x20/0x160 [ 32.125461] __split_vma+0x170/0x950 [ 32.125949] split_vma+0xc6/0x110 [ 32.126405] mprotect_fixup+0x8d2/0xb30 [ 32.126920] do_mprotect_pkey+0x87e/0xd40 [ 32.127460] __x64_sys_mprotect+0x78/0xc0 [ 32.128011] do_syscall_64+0x3f/0x90 [ 32.128502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.129164] [ 32.129388] Freed by task 19: [ 32.129785] kasan_save_stack+0x22/0x50 [ 32.130304] kasan_set_track+0x25/0x30 [ 32.130815] kasan_save_free_info+0x2b/0x50 [ 32.131371] __kasan_slab_free+0x10a/0x190 [ 32.131942] kmem_cache_free+0x10d/0x4d0 [ 32.132465] rcu_core+0x8c8/0x2860 [ 32.132924] __do_softirq+0x1b7/0x7d4 [ 32.133417] [ 32.133640] Last potentially related work creation: [ 32.134245] kasan_save_stack+0x22/0x50 [ 32.134766] __kasan_record_aux_stack+0x8e/0xa0 [ 32.135364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.136040] remove_vma+0x139/0x170 [ 32.136507] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.137086] do_vmi_munmap+0x1f1/0x2b0 [ 32.137594] __vm_munmap+0x138/0x3a0 [ 32.138077] __x64_sys_munmap+0x59/0x80 [ 32.138597] do_syscall_64+0x3f/0x90 [ 32.139103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.139772] [ 32.139993] The buggy address belongs to the object at ffff88800df1c1d0 [ 32.139993] which belongs to the cache vm_area_struct of size 168 [ 32.141486] The buggy address is located 88 bytes inside of [ 32.141486] freed 168-byte region [ffff88800df1c1d0, ffff88800df1c278) [ 32.142915] [ 32.143133] The buggy address belongs to the physical page: [ 32.143839] page:000000000ab66cfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf1c [ 32.144947] memcg:ffff88800decd001 [ 32.145378] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.146030] page_type: 0xffffffff() [ 32.146490] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.147421] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800decd001 [ 32.148360] page dumped because: kasan: bad access detected [ 32.149033] [ 32.149247] Memory state around the buggy address: [ 32.149834] ffff88800df1c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.150714] ffff88800df1c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.151565] >ffff88800df1c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.152454] ^ [ 32.153021] ffff88800df1c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.153882] ffff88800df1c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.154747] ================================================================== [ 32.155765] Disabling lock debugging due to kernel taint [ 34.140322] BUG: Bad rss-counter state mm:000000002bac301c type:MM_FILEPAGES val:33 [ 34.141519] BUG: Bad rss-counter state mm:000000002bac301c type:MM_ANONPAGES val:22 [ 34.601065] BUG: Bad rss-counter state mm:0000000055ea4d43 type:MM_FILEPAGES val:33 [ 34.602125] BUG: Bad rss-counter state mm:0000000055ea4d43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55741' (ECDSA) to the list of known hosts. 2023/06/19 11:19:02 fuzzer started 2023/06/19 11:19:02 dialing manager at localhost:44161 2023/06/19 11:19:02 checking machine... 2023/06/19 11:19:02 checking revisions... [ 35.314805] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:19:02 testing simple program... [ 35.361155] cgroup: Unknown subsys name 'net' [ 35.436357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:01 Registers: info registers vcpu 0 RAX=ffffed100188fbde RBX=ffffed100188fbdf RCX=ffffffff84524738 RDX=ffffed100188fbdf RSI=0000000000000008 RDI=ffff88800c47def0 RBP=ffffed100188fbde RSP=ffff888014247920 R8 =0000000000000000 R9 =ffffed100188fbde R10=ffff88800c47def7 R11=0000000000000001 R12=1ffff11002848f29 R13=dffffc0000000000 R14=ffff88800c47dee8 R15=ffff88800c47def0 RIP=ffffffff8180f009 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 00007f9e06947900 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=00007f9e05e67000 CR3=0000000009d64000 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=80e81c5b879f6d0400000000000ae988 XMM05=0ce2a99149ef8ef80000000000134d68 XMM06=c291bd5c70af25b90000000000133b58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860acb48 RBX=0000000000000001 RCX=ffffffff8120674e RDX=0000000000000000 RSI=ffffffff860acb48 RDI=ffffffff85da037c RBP=ffff888008e57958 RSP=ffff888008e57870 R8 =ffffffff860acb48 R9 =ffff888008e57940 R10=0000000000038001 R11=0000000000009bea R12=ffff888008e57960 R13=ffffffff85da037c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbb RFL=00000282 [--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 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=00007f156086a0b0 CR3=000000001582a000 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=2031303a39313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000