syzkaller login: [ 28.684768] BUG: Bad rss-counter state mm:00000000687ba282 type:MM_FILEPAGES val:33 [ 28.685979] BUG: Bad rss-counter state mm:00000000687ba282 type:MM_ANONPAGES val:22 [ 28.889934] ================================================================== [ 28.890957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.891990] Read of size 8 at addr ffff88800d5ef228 by task sshd/221 [ 28.892945] [ 28.893201] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.894151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.895280] Call Trace: [ 28.895640] [ 28.895950] dump_stack_lvl+0x91/0xf0 [ 28.896473] print_report+0xcc/0x620 [ 28.896998] ? __virt_addr_valid+0x102/0x340 [ 28.897586] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898241] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898907] kasan_report+0xbe/0xf0 [ 28.899419] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900098] vma_interval_tree_remove+0xc75/0xec0 [ 28.900764] vma_prepare+0xc54/0x11a0 [ 28.901297] __split_vma+0x5af/0x950 [ 28.901821] ? __pfx___split_vma+0x10/0x10 [ 28.902416] ? find_held_lock+0x2c/0x110 [ 28.902995] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.903615] ? lock_is_held_type+0x9f/0x120 [ 28.904210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.904881] ? mtree_range_walk+0x632/0x900 [ 28.905495] ? mas_walk+0x5c7/0x7c0 [ 28.906016] do_vmi_munmap+0x1f1/0x2b0 [ 28.906580] mmap_region+0x1f9/0x2660 [ 28.907112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.907674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.908466] ? __pfx_lock_acquire+0x10/0x10 [ 28.909052] ? __pfx_mmap_region+0x10/0x10 [ 28.909635] ? security_mmap_addr+0x7d/0xa0 [ 28.910217] ? get_unmapped_area+0x1f5/0x3f0 [ 28.910846] do_mmap+0x854/0xf00 [ 28.911336] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.911889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.912514] ksys_mmap_pgoff+0x3af/0x500 [ 28.913081] do_syscall_64+0x3f/0x90 [ 28.913615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.914336] RIP: 0033:0x7f98887cbd82 [ 28.914844] 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 [ 28.917209] RSP: 002b:00007ffdabcdccd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.918214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98887cbd82 [ 28.919193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9887c05000 [ 28.920134] RBP: 00007f9887c05000 R08: 0000000000000009 R09: 0000000000001000 [ 28.921083] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ca2e61f60 [ 28.922021] R13: 00007ffdabcdccf0 R14: 00007ffdabcdcd20 R15: 00007ffdabcdd080 [ 28.922973] [ 28.923300] [ 28.923537] Allocated by task 211: [ 28.924014] kasan_save_stack+0x22/0x50 [ 28.924575] kasan_set_track+0x25/0x30 [ 28.925117] __kasan_slab_alloc+0x59/0x70 [ 28.925691] kmem_cache_alloc+0x16b/0x370 [ 28.926269] vm_area_dup+0x20/0x160 [ 28.926772] __split_vma+0x170/0x950 [ 28.927290] split_vma+0xc6/0x110 [ 28.927771] mprotect_fixup+0x8d2/0xb30 [ 28.928330] do_mprotect_pkey+0x87e/0xd40 [ 28.928909] __x64_sys_mprotect+0x78/0xc0 [ 28.929480] do_syscall_64+0x3f/0x90 [ 28.930005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930734] [ 28.930976] Freed by task 211: [ 28.931412] kasan_save_stack+0x22/0x50 [ 28.931969] kasan_set_track+0x25/0x30 [ 28.932528] kasan_save_free_info+0x2b/0x50 [ 28.933119] __kasan_slab_free+0x10a/0x190 [ 28.933708] kmem_cache_free+0x10d/0x4d0 [ 28.934348] rcu_core+0x8c8/0x2860 [ 28.934825] __do_softirq+0x1b7/0x7d4 [ 28.935340] [ 28.935568] Last potentially related work creation: [ 28.936193] kasan_save_stack+0x22/0x50 [ 28.936726] __kasan_record_aux_stack+0x8e/0xa0 [ 28.937336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.938020] remove_vma+0x139/0x170 [ 28.938523] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.939120] do_vmi_munmap+0x1f1/0x2b0 [ 28.939640] __vm_munmap+0x138/0x3a0 [ 28.940139] __x64_sys_munmap+0x59/0x80 [ 28.940665] do_syscall_64+0x3f/0x90 [ 28.941171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.941881] [ 28.942118] Second to last potentially related work creation: [ 28.942879] kasan_save_stack+0x22/0x50 [ 28.943428] __kasan_record_aux_stack+0x8e/0xa0 [ 28.944061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.944763] remove_vma+0x139/0x170 [ 28.945267] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.945888] do_vmi_munmap+0x1f1/0x2b0 [ 28.946432] mmap_region+0x1f9/0x2660 [ 28.946958] do_mmap+0x854/0xf00 [ 28.947430] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.947963] ksys_mmap_pgoff+0x3af/0x500 [ 28.948512] do_syscall_64+0x3f/0x90 [ 28.949031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949731] [ 28.949969] The buggy address belongs to the object at ffff88800d5ef1d0 [ 28.949969] which belongs to the cache vm_area_struct of size 168 [ 28.951633] The buggy address is located 88 bytes inside of [ 28.951633] freed 168-byte region [ffff88800d5ef1d0, ffff88800d5ef278) [ 28.953196] [ 28.953431] The buggy address belongs to the physical page: [ 28.954165] page:00000000b4d8d7ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5ef [ 28.955403] memcg:ffff88800d78e301 [ 28.955874] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.956642] page_type: 0xffffffff() [ 28.957146] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b240 dead000000000005 [ 28.958151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d78e301 [ 28.959176] page dumped because: kasan: bad access detected [ 28.959910] [ 28.960146] Memory state around the buggy address: [ 28.960785] ffff88800d5ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.961737] ffff88800d5ef180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.962708] >ffff88800d5ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.963652] ^ [ 28.964313] ffff88800d5ef280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.965322] ffff88800d5ef300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.966339] ================================================================== [ 28.967472] Disabling lock debugging due to kernel taint [ 31.034639] BUG: Bad rss-counter state mm:00000000630b8634 type:MM_FILEPAGES val:33 [ 31.035655] BUG: Bad rss-counter state mm:00000000630b8634 type:MM_ANONPAGES val:22 [ 31.487399] BUG: Bad rss-counter state mm:0000000049fc9359 type:MM_FILEPAGES val:33 [ 31.488429] BUG: Bad rss-counter state mm:0000000049fc9359 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48296' (ECDSA) to the list of known hosts. 2023/06/20 10:54:37 fuzzer started 2023/06/20 10:54:38 dialing manager at localhost:36067 2023/06/20 10:54:38 checking machine... 2023/06/20 10:54:38 checking revisions... [ 32.088803] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:54:38 testing simple program... [ 32.127500] cgroup: Unknown subsys name 'net' [ 32.172780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:37 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=00007f20feb1e163 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450cc8c RBP=0000000000000000 RSP=ffff888018cf7f58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84600114 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 00007f20fe62b900 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=00007ffcf99f3000 CR3=000000000e0fc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f67c7546660 CR3=0000000016b38000 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=2037333a34353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000