syzkaller login: [ 35.603112] BUG: Bad rss-counter state mm:00000000d2d62593 type:MM_FILEPAGES val:33 [ 35.604338] BUG: Bad rss-counter state mm:00000000d2d62593 type:MM_ANONPAGES val:22 [ 35.762694] ================================================================== [ 35.763600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.764537] Read of size 8 at addr ffff88801a1db228 by task sshd/221 [ 35.765423] [ 35.765710] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.766576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.767562] Call Trace: [ 35.767881] [ 35.768165] dump_stack_lvl+0x91/0xf0 [ 35.768668] print_report+0xcc/0x620 [ 35.769152] ? __virt_addr_valid+0x102/0x340 [ 35.769744] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.770371] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.771009] kasan_report+0xbe/0xf0 [ 35.771491] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.772117] vma_interval_tree_remove+0xc75/0xec0 [ 35.772718] vma_prepare+0xc54/0x11a0 [ 35.773201] __split_vma+0x5af/0x950 [ 35.773698] ? __pfx___split_vma+0x10/0x10 [ 35.774229] ? find_held_lock+0x2c/0x110 [ 35.774755] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.775320] ? lock_is_held_type+0x9f/0x120 [ 35.775863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.776479] ? mtree_range_walk+0x632/0x900 [ 35.777026] ? mas_walk+0x5c7/0x7c0 [ 35.777507] do_vmi_munmap+0x1f1/0x2b0 [ 35.778002] mmap_region+0x1f9/0x2660 [ 35.778489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.779002] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.779721] ? __pfx_lock_acquire+0x10/0x10 [ 35.780250] ? __pfx_mmap_region+0x10/0x10 [ 35.780786] ? security_mmap_addr+0x7d/0xa0 [ 35.781314] ? get_unmapped_area+0x1f5/0x3f0 [ 35.781884] do_mmap+0x854/0xf00 [ 35.782322] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.782815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.783376] ksys_mmap_pgoff+0x3af/0x500 [ 35.783884] do_syscall_64+0x3f/0x90 [ 35.784359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.784999] RIP: 0033:0x7f27dfd9ad82 [ 35.785455] 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 [ 35.787571] RSP: 002b:00007ffe71e9ba08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.788480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27dfd9ad82 [ 35.789356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27df1d4000 [ 35.790220] RBP: 00007f27df1d4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.791074] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600fb5c5b20 [ 35.791930] R13: 00007ffe71e9ba20 R14: 00007ffe71e9ba50 R15: 00007ffe71e9bdb0 [ 35.792793] [ 35.793084] [ 35.793304] Allocated by task 214: [ 35.793757] kasan_save_stack+0x22/0x50 [ 35.794267] kasan_set_track+0x25/0x30 [ 35.794771] __kasan_slab_alloc+0x59/0x70 [ 35.795297] kmem_cache_alloc+0x16b/0x370 [ 35.795818] vm_area_dup+0x20/0x160 [ 35.796276] __split_vma+0x170/0x950 [ 35.796749] split_vma+0xc6/0x110 [ 35.797188] mprotect_fixup+0x8d2/0xb30 [ 35.797721] do_mprotect_pkey+0x87e/0xd40 [ 35.798264] __x64_sys_mprotect+0x78/0xc0 [ 35.798812] do_syscall_64+0x3f/0x90 [ 35.799304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.799979] [ 35.800206] Freed by task 214: [ 35.800614] kasan_save_stack+0x22/0x50 [ 35.801148] kasan_set_track+0x25/0x30 [ 35.801685] kasan_save_free_info+0x2b/0x50 [ 35.802252] __kasan_slab_free+0x10a/0x190 [ 35.802809] kmem_cache_free+0x10d/0x4d0 [ 35.803341] rcu_core+0x8c8/0x2860 [ 35.803806] __do_softirq+0x1b7/0x7d4 [ 35.804319] [ 35.804548] Last potentially related work creation: [ 35.805171] kasan_save_stack+0x22/0x50 [ 35.805710] __kasan_record_aux_stack+0x8e/0xa0 [ 35.806314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.807047] remove_vma+0x139/0x170 [ 35.807533] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.808126] do_vmi_munmap+0x1f1/0x2b0 [ 35.808640] __vm_munmap+0x138/0x3a0 [ 35.809132] __x64_sys_munmap+0x59/0x80 [ 35.809665] do_syscall_64+0x3f/0x90 [ 35.810169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.810844] [ 35.811071] The buggy address belongs to the object at ffff88801a1db1d0 [ 35.811071] which belongs to the cache vm_area_struct of size 168 [ 35.812626] The buggy address is located 88 bytes inside of [ 35.812626] freed 168-byte region [ffff88801a1db1d0, ffff88801a1db278) [ 35.814110] [ 35.814336] The buggy address belongs to the physical page: [ 35.815032] page:0000000002f694c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1db [ 35.816202] memcg:ffff88801a1d9101 [ 35.816654] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.817336] page_type: 0xffffffff() [ 35.817822] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.818783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1d9101 [ 35.819739] page dumped because: kasan: bad access detected [ 35.820443] [ 35.820673] Memory state around the buggy address: [ 35.821284] ffff88801a1db100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.822209] ffff88801a1db180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.823113] >ffff88801a1db200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.824018] ^ [ 35.824593] ffff88801a1db280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.825521] ffff88801a1db300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.826414] ================================================================== [ 35.827394] Disabling lock debugging due to kernel taint [ 38.144917] BUG: Bad rss-counter state mm:00000000a12df8d8 type:MM_FILEPAGES val:33 [ 38.146062] BUG: Bad rss-counter state mm:00000000a12df8d8 type:MM_ANONPAGES val:22 [ 38.723866] BUG: Bad rss-counter state mm:00000000f2df34d1 type:MM_FILEPAGES val:33 [ 38.724986] BUG: Bad rss-counter state mm:00000000f2df34d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23705' (ECDSA) to the list of known hosts. 2023/06/19 16:16:09 fuzzer started 2023/06/19 16:16:09 dialing manager at localhost:44161 2023/06/19 16:16:09 checking machine... 2023/06/19 16:16:09 checking revisions... [ 39.364022] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:16:09 testing simple program... [ 39.409054] cgroup: Unknown subsys name 'net' [ 39.453609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016c2f4e0 RCX=0000000000000001 RDX=1ffff11002d85eaf RSI=ffffffff81802eb3 RDI=ffff888016c2f4ec RBP=ffff888016c2f578 RSP=ffff888016c2f3f8 R8 =0000000000000001 R9 =ffff888016c2f458 R10=0000000000038001 R11=0000000000020d06 R12=ffff888016c2f4e0 R13=0000000000000000 R14=ffff88800f6551c0 R15=ffff88800ca10000 RIP=ffffffff813ad4f3 RFL=00000216 [----AP-] 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 00007f1ba2a2a700 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=00007fc0fd3eb770 CR3=000000000f214000 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=2039303a36313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8386dfaa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806cf09a98 RSI=ffffffff8386dfaa RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000091af6 R12=ffff88806cf09b18 R13=ffff88806cf09a98 R14=ffff8880147a9b40 R15=ffff88806cf09a50 RIP=ffffffff81130641 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 00007f1e48dd6900 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=00007ffdf26aa000 CR3=000000000c6f0000 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=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