syzkaller login: [ 30.354008] BUG: Bad rss-counter state mm:000000003f91984e type:MM_FILEPAGES val:33 [ 30.355265] BUG: Bad rss-counter state mm:000000003f91984e type:MM_ANONPAGES val:22 [ 30.396627] ================================================================== [ 30.397688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.398675] Read of size 8 at addr ffff88801a1bad08 by task sshd/219 [ 30.399617] [ 30.399884] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.400889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.401907] Call Trace: [ 30.402280] [ 30.402568] dump_stack_lvl+0x91/0xf0 [ 30.403099] print_report+0xcc/0x620 [ 30.403650] ? __virt_addr_valid+0x102/0x340 [ 30.404330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.404972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.405591] kasan_report+0xbe/0xf0 [ 30.406072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406712] vma_interval_tree_remove+0xc75/0xec0 [ 30.407320] vma_prepare+0xc54/0x11a0 [ 30.407807] __split_vma+0x5af/0x950 [ 30.408294] ? __pfx___split_vma+0x10/0x10 [ 30.408848] ? find_held_lock+0x2c/0x110 [ 30.409374] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.409944] ? lock_is_held_type+0x9f/0x120 [ 30.410490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.411102] ? mtree_range_walk+0x632/0x900 [ 30.411667] ? mas_walk+0x5c7/0x7c0 [ 30.412147] do_vmi_munmap+0x1f1/0x2b0 [ 30.412664] mmap_region+0x1f9/0x2660 [ 30.413152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.413663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.414383] ? __pfx_lock_acquire+0x10/0x10 [ 30.414936] ? __pfx_mmap_region+0x10/0x10 [ 30.415477] ? security_mmap_addr+0x7d/0xa0 [ 30.416022] ? get_unmapped_area+0x1f5/0x3f0 [ 30.416610] do_mmap+0x854/0xf00 [ 30.417059] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.417566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.418137] ksys_mmap_pgoff+0x3af/0x500 [ 30.418665] do_syscall_64+0x3f/0x90 [ 30.419150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.419817] RIP: 0033:0x7fb0e4b09d82 [ 30.420277] 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 [ 30.422448] RSP: 002b:00007ffe786e39c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.423378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0e4b09d82 [ 30.424242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0e3f43000 [ 30.425123] RBP: 00007fb0e3f43000 R08: 0000000000000009 R09: 0000000000001000 [ 30.425990] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbf97b1ec0 [ 30.426855] R13: 00007ffe786e39e0 R14: 00007ffe786e3a10 R15: 00007ffe786e3d70 [ 30.427724] [ 30.428022] [ 30.428240] Allocated by task 212: [ 30.428698] kasan_save_stack+0x22/0x50 [ 30.429221] kasan_set_track+0x25/0x30 [ 30.429724] __kasan_slab_alloc+0x59/0x70 [ 30.430260] kmem_cache_alloc+0x16b/0x370 [ 30.430787] vm_area_dup+0x20/0x160 [ 30.431247] __split_vma+0x170/0x950 [ 30.431715] split_vma+0xc6/0x110 [ 30.432156] mprotect_fixup+0x8d2/0xb30 [ 30.432674] do_mprotect_pkey+0x87e/0xd40 [ 30.433192] __x64_sys_mprotect+0x78/0xc0 [ 30.433712] do_syscall_64+0x3f/0x90 [ 30.434203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.434854] [ 30.435068] Freed by task 212: [ 30.435461] kasan_save_stack+0x22/0x50 [ 30.435964] kasan_set_track+0x25/0x30 [ 30.436486] kasan_save_free_info+0x2b/0x50 [ 30.437026] __kasan_slab_free+0x10a/0x190 [ 30.437567] kmem_cache_free+0x10d/0x4d0 [ 30.438138] rcu_core+0x8c8/0x2860 [ 30.438589] __do_softirq+0x1b7/0x7d4 [ 30.439071] [ 30.439285] Last potentially related work creation: [ 30.439889] kasan_save_stack+0x22/0x50 [ 30.440400] __kasan_record_aux_stack+0x8e/0xa0 [ 30.440981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.441629] remove_vma+0x139/0x170 [ 30.442077] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.442639] do_vmi_munmap+0x1f1/0x2b0 [ 30.443127] __vm_munmap+0x138/0x3a0 [ 30.443600] __x64_sys_munmap+0x59/0x80 [ 30.444093] do_syscall_64+0x3f/0x90 [ 30.444590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.445243] [ 30.445459] The buggy address belongs to the object at ffff88801a1bacb0 [ 30.445459] which belongs to the cache vm_area_struct of size 168 [ 30.446936] The buggy address is located 88 bytes inside of [ 30.446936] freed 168-byte region [ffff88801a1bacb0, ffff88801a1bad58) [ 30.448352] [ 30.448574] The buggy address belongs to the physical page: [ 30.449245] page:00000000b2e17c04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ba [ 30.450355] memcg:ffff88800de57401 [ 30.450791] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.451439] page_type: 0xffffffff() [ 30.451900] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.452839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de57401 [ 30.453746] page dumped because: kasan: bad access detected [ 30.454408] [ 30.454626] Memory state around the buggy address: [ 30.455235] ffff88801a1bac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.456133] ffff88801a1bac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.457159] >ffff88801a1bad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.458032] ^ [ 30.458477] ffff88801a1bad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.459355] ffff88801a1bae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.460235] ================================================================== [ 30.461182] Disabling lock debugging due to kernel taint [ 32.532845] BUG: Bad rss-counter state mm:0000000047f871fc type:MM_FILEPAGES val:33 [ 32.533844] BUG: Bad rss-counter state mm:0000000047f871fc type:MM_ANONPAGES val:22 [ 33.010600] BUG: Bad rss-counter state mm:0000000044e9c3c7 type:MM_FILEPAGES val:33 [ 33.011804] BUG: Bad rss-counter state mm:0000000044e9c3c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52544' (ECDSA) to the list of known hosts. 2023/06/21 07:08:56 fuzzer started 2023/06/21 07:08:56 dialing manager at localhost:36067 2023/06/21 07:08:56 checking machine... 2023/06/21 07:08:56 checking revisions... [ 33.737739] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:08:56 testing simple program... [ 33.786068] cgroup: Unknown subsys name 'net' [ 33.835782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:08:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800da5ad60 RCX=ffffffff818e9a09 RDX=1ffff11001b4b5af RSI=0000000000000008 RDI=ffff88800da5ae10 RBP=0000000000000008 RSP=ffff888018687e00 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000008 R13=ffff88800da5ad78 R14=0000000000000000 R15=ffff88800da5ae10 RIP=ffffffff8180fed8 RFL=00000256 [---ZAP-] 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 00007f6e5052c900 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=00007ffea1fe0000 CR3=000000000f0ac000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f4092aa2c80 CR3=0000000016cc8000 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=2036353a38303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38303a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000