syzkaller login: [ 30.733268] BUG: Bad rss-counter state mm:00000000e1732534 type:MM_FILEPAGES val:33 [ 30.734269] BUG: Bad rss-counter state mm:00000000e1732534 type:MM_ANONPAGES val:22 [ 30.916330] ================================================================== [ 30.917394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.918550] Read of size 8 at addr ffff88800d5b4c20 by task sshd/219 [ 30.919407] [ 30.919649] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.920615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.921705] Call Trace: [ 30.922059] [ 30.922376] dump_stack_lvl+0x91/0xf0 [ 30.922933] print_report+0xcc/0x620 [ 30.923474] ? __virt_addr_valid+0x102/0x340 [ 30.924105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924791] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.925501] kasan_report+0xbe/0xf0 [ 30.926043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926738] vma_interval_tree_remove+0xc75/0xec0 [ 30.927415] vma_prepare+0xc54/0x11a0 [ 30.927978] __split_vma+0x5af/0x950 [ 30.928512] ? __pfx___split_vma+0x10/0x10 [ 30.929106] ? find_held_lock+0x2c/0x110 [ 30.929685] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.930325] ? lock_is_held_type+0x9f/0x120 [ 30.930920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.931603] ? mtree_range_walk+0x632/0x900 [ 30.932237] ? mas_walk+0x5c7/0x7c0 [ 30.932765] do_vmi_munmap+0x1f1/0x2b0 [ 30.933318] mmap_region+0x1f9/0x2660 [ 30.933858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.934437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.935253] ? __pfx_lock_acquire+0x10/0x10 [ 30.935876] ? __pfx_mmap_region+0x10/0x10 [ 30.936473] ? security_mmap_addr+0x7d/0xa0 [ 30.937078] ? get_unmapped_area+0x1f5/0x3f0 [ 30.937695] do_mmap+0x854/0xf00 [ 30.938187] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.938751] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.939396] ksys_mmap_pgoff+0x3af/0x500 [ 30.939990] do_syscall_64+0x3f/0x90 [ 30.940527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.941256] RIP: 0033:0x7f6345981d82 [ 30.941779] 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 [ 30.944192] RSP: 002b:00007ffe031078e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.945214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6345981d82 [ 30.946172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6344dbb000 [ 30.947130] RBP: 00007f6344dbb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.948104] R10: 0000000000000812 R11: 0000000000000206 R12: 000055624c948ec0 [ 30.949065] R13: 00007ffe03107900 R14: 00007ffe03107930 R15: 00007ffe03107c90 [ 30.950058] [ 30.950390] [ 30.950629] Allocated by task 212: [ 30.951123] kasan_save_stack+0x22/0x50 [ 30.951690] kasan_set_track+0x25/0x30 [ 30.952274] __kasan_slab_alloc+0x59/0x70 [ 30.952867] kmem_cache_alloc+0x16b/0x370 [ 30.953455] vm_area_dup+0x20/0x160 [ 30.953976] __split_vma+0x170/0x950 [ 30.954503] split_vma+0xc6/0x110 [ 30.955006] mprotect_fixup+0x8d2/0xb30 [ 30.955582] do_mprotect_pkey+0x87e/0xd40 [ 30.956186] __x64_sys_mprotect+0x78/0xc0 [ 30.956778] do_syscall_64+0x3f/0x90 [ 30.957318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.958050] [ 30.958301] Freed by task 212: [ 30.958751] kasan_save_stack+0x22/0x50 [ 30.959408] kasan_set_track+0x25/0x30 [ 30.959986] kasan_save_free_info+0x2b/0x50 [ 30.960591] __kasan_slab_free+0x10a/0x190 [ 30.961196] kmem_cache_free+0x10d/0x4d0 [ 30.961779] rcu_core+0x8c8/0x2860 [ 30.962279] __do_softirq+0x1b7/0x7d4 [ 30.962816] [ 30.963062] Last potentially related work creation: [ 30.963722] kasan_save_stack+0x22/0x50 [ 30.964314] __kasan_record_aux_stack+0x8e/0xa0 [ 30.964964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.965687] remove_vma+0x139/0x170 [ 30.966196] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.966827] do_vmi_munmap+0x1f1/0x2b0 [ 30.967378] __vm_munmap+0x138/0x3a0 [ 30.967918] __x64_sys_munmap+0x59/0x80 [ 30.968483] do_syscall_64+0x3f/0x90 [ 30.969016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.969744] [ 30.969990] Second to last potentially related work creation: [ 30.970764] kasan_save_stack+0x22/0x50 [ 30.971334] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.972739] remove_vma+0x139/0x170 [ 30.973251] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.973883] do_vmi_munmap+0x1f1/0x2b0 [ 30.974434] mmap_region+0x1f9/0x2660 [ 30.974981] do_mmap+0x854/0xf00 [ 30.975468] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.976028] ksys_mmap_pgoff+0x3af/0x500 [ 30.976600] do_syscall_64+0x3f/0x90 [ 30.977132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977868] [ 30.978116] The buggy address belongs to the object at ffff88800d5b4bc8 [ 30.978116] which belongs to the cache vm_area_struct of size 168 [ 30.979774] The buggy address is located 88 bytes inside of [ 30.979774] freed 168-byte region [ffff88800d5b4bc8, ffff88800d5b4c70) [ 30.981391] [ 30.981637] The buggy address belongs to the physical page: [ 30.982381] page:00000000706456fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b4 [ 30.983608] memcg:ffff88800dcca301 [ 30.984108] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.984899] page_type: 0xffffffff() [ 30.985410] raw: 0100000000000200 ffff88800879fc80 ffffea00003bac40 dead000000000003 [ 30.986459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcca301 [ 30.987479] page dumped because: kasan: bad access detected [ 30.988237] [ 30.988487] Memory state around the buggy address: [ 30.989141] ffff88800d5b4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.990109] ffff88800d5b4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.991067] >ffff88800d5b4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.992080] ^ [ 30.992676] ffff88800d5b4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.993644] ffff88800d5b4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.994602] ================================================================== [ 30.995681] Disabling lock debugging due to kernel taint [ 33.166708] BUG: Bad rss-counter state mm:00000000610eb45e type:MM_FILEPAGES val:33 [ 33.167888] BUG: Bad rss-counter state mm:00000000610eb45e type:MM_ANONPAGES val:22 [ 33.659021] BUG: Bad rss-counter state mm:00000000d7ce5497 type:MM_FILEPAGES val:33 [ 33.660110] BUG: Bad rss-counter state mm:00000000d7ce5497 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36848' (ECDSA) to the list of known hosts. 2023/06/20 00:59:15 fuzzer started 2023/06/20 00:59:16 dialing manager at localhost:44161 2023/06/20 00:59:16 checking machine... 2023/06/20 00:59:16 checking revisions... [ 34.428596] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:59:16 testing simple program... [ 34.471861] cgroup: Unknown subsys name 'net' [ 34.524585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9ad90c3440 CR3=0000000006a78000 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=00000000000000000000000000000000 XMM01=1ab73be5aaa878b1a640d7a8668a416d XMM02=2c67c8bc2e329bc3000000000011cca0 XMM03=fb795ef6d65770560000000000123af0 XMM04=1e91aaef5901bb1700000000000ae988 XMM05=dfcdbad4f1609c3700000000001349d8 XMM06=25d8bc9ec26f33d10000000000133bb0 XMM07=e042d86d42eb936e0000000000123dc8 XMM08=8149fe36c249b31e000000000011cd00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81808776 RDX=0000000000008088 RSI=0000000000008087 RDI=ffffffff86507de0 RBP=ffff88801a1678d0 RSP=ffff88801a167808 R8 =0000000000000000 R9 =ffff88801a1678b8 R10=0000000000038001 R11=0000000000020c55 R12=ffff88801a1678d8 R13=ffff88801a1678c0 R14=ffff88801a1678b9 R15=ffff88801a167878 RIP=ffffffff811307e3 RFL=00000212 [----A--] 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 00007f91bef55900 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=00007ffc9589f000 CR3=000000000f12e000 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=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