syzkaller login: [ 31.838232] BUG: Bad rss-counter state mm:00000000129ff7c5 type:MM_FILEPAGES val:33 [ 31.839430] BUG: Bad rss-counter state mm:00000000129ff7c5 type:MM_ANONPAGES val:22 [ 31.874978] ================================================================== [ 31.875956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.876887] Read of size 8 at addr ffff88800f0e54e0 by task sshd/220 [ 31.877764] [ 31.878034] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.878940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.879898] Call Trace: [ 31.880217] [ 31.880499] dump_stack_lvl+0x91/0xf0 [ 31.880995] print_report+0xcc/0x620 [ 31.881474] ? __virt_addr_valid+0x102/0x340 [ 31.882021] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.882640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.883256] kasan_report+0xbe/0xf0 [ 31.883724] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.884342] vma_interval_tree_remove+0xc75/0xec0 [ 31.885060] vma_prepare+0xc54/0x11a0 [ 31.885554] __split_vma+0x5af/0x950 [ 31.886018] ? __pfx___split_vma+0x10/0x10 [ 31.886560] ? find_held_lock+0x2c/0x110 [ 31.887085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.887654] ? lock_is_held_type+0x9f/0x120 [ 31.888198] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.888805] ? mtree_range_walk+0x632/0x900 [ 31.889358] ? mas_walk+0x5c7/0x7c0 [ 31.889826] do_vmi_munmap+0x1f1/0x2b0 [ 31.890310] mmap_region+0x1f9/0x2660 [ 31.890802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.891307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.892017] ? __pfx_lock_acquire+0x10/0x10 [ 31.892550] ? __pfx_mmap_region+0x10/0x10 [ 31.893071] ? security_mmap_addr+0x7d/0xa0 [ 31.893600] ? get_unmapped_area+0x1f5/0x3f0 [ 31.894145] do_mmap+0x854/0xf00 [ 31.894599] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.895091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.895648] ksys_mmap_pgoff+0x3af/0x500 [ 31.896160] do_syscall_64+0x3f/0x90 [ 31.896639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.897285] RIP: 0033:0x7fb536853d82 [ 31.897733] 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 [ 31.899827] RSP: 002b:00007ffdda5df0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.900724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb536853d82 [ 31.901553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb535c8d000 [ 31.902384] RBP: 00007fb535c8d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.903241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df32cfdec0 [ 31.904129] R13: 00007ffdda5df100 R14: 00007ffdda5df130 R15: 00007ffdda5df490 [ 31.904983] [ 31.905277] [ 31.905496] Allocated by task 213: [ 31.905916] kasan_save_stack+0x22/0x50 [ 31.906421] kasan_set_track+0x25/0x30 [ 31.906936] __kasan_slab_alloc+0x59/0x70 [ 31.907467] kmem_cache_alloc+0x16b/0x370 [ 31.907994] vm_area_dup+0x20/0x160 [ 31.908447] __split_vma+0x170/0x950 [ 31.908911] split_vma+0xc6/0x110 [ 31.909351] mprotect_fixup+0x8d2/0xb30 [ 31.909856] do_mprotect_pkey+0x87e/0xd40 [ 31.910379] __x64_sys_mprotect+0x78/0xc0 [ 31.910910] do_syscall_64+0x3f/0x90 [ 31.911388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912038] [ 31.912256] Freed by task 210: [ 31.912653] kasan_save_stack+0x22/0x50 [ 31.913157] kasan_set_track+0x25/0x30 [ 31.913653] kasan_save_free_info+0x2b/0x50 [ 31.914188] __kasan_slab_free+0x10a/0x190 [ 31.914739] kmem_cache_free+0x10d/0x4d0 [ 31.915251] rcu_core+0x8c8/0x2860 [ 31.915708] __do_softirq+0x1b7/0x7d4 [ 31.916189] [ 31.916405] Last potentially related work creation: [ 31.916990] kasan_save_stack+0x22/0x50 [ 31.917493] __kasan_record_aux_stack+0x8e/0xa0 [ 31.918061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.918721] remove_vma+0x139/0x170 [ 31.919174] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.919732] do_vmi_munmap+0x1f1/0x2b0 [ 31.920216] __vm_munmap+0x138/0x3a0 [ 31.920689] __x64_sys_munmap+0x59/0x80 [ 31.921197] do_syscall_64+0x3f/0x90 [ 31.921712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922361] [ 31.922593] The buggy address belongs to the object at ffff88800f0e5488 [ 31.922593] which belongs to the cache vm_area_struct of size 168 [ 31.924040] The buggy address is located 88 bytes inside of [ 31.924040] freed 168-byte region [ffff88800f0e5488, ffff88800f0e5530) [ 31.925417] [ 31.925638] The buggy address belongs to the physical page: [ 31.926283] page:0000000068af1cf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0e5 [ 31.927361] memcg:ffff88800e271901 [ 31.927786] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.928421] page_type: 0xffffffff() [ 31.928878] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.929780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e271901 [ 31.930777] page dumped because: kasan: bad access detected [ 31.931424] [ 31.931641] Memory state around the buggy address: [ 31.932213] ffff88800f0e5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.933056] ffff88800f0e5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.933896] >ffff88800f0e5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.934738] ^ [ 31.935478] ffff88800f0e5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.936319] ffff88800f0e5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.937159] ================================================================== [ 31.938119] Disabling lock debugging due to kernel taint [ 34.638609] BUG: Bad rss-counter state mm:00000000d17b0800 type:MM_FILEPAGES val:33 [ 34.640021] BUG: Bad rss-counter state mm:00000000d17b0800 type:MM_ANONPAGES val:22 [ 35.129297] BUG: Bad rss-counter state mm:0000000045a32bee type:MM_FILEPAGES val:33 [ 35.130464] BUG: Bad rss-counter state mm:0000000045a32bee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1859' (ECDSA) to the list of known hosts. 2023/06/20 19:45:58 fuzzer started 2023/06/20 19:45:58 dialing manager at localhost:36067 2023/06/20 19:45:58 checking machine... 2023/06/20 19:45:58 checking revisions... [ 35.844831] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:45:59 testing simple program... [ 35.895467] cgroup: Unknown subsys name 'net' [ 35.946358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fdc277d5163 RCX=0000000000000000 RDX=ffff88800f46d1c0 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fdc277d5163 RSP=ffff8880168e7200 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fdc277d5000 R11=00000000000b6a61 R12=ffff8880168e7320 R13=0000000000000000 R14=ffff88800f46d1c0 R15=00000000000928c0 RIP=ffffffff811fc714 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 00007fdc272e2900 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=00007fff84f21000 CR3=00000000146ae000 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=ffffffff860d2587 RBX=0000000000000002 RCX=ffffffff860d2586 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff860d258a R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09dc0 R15=ffff88806cf09a50 RIP=ffffffff81130b99 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 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=00007fc9dce72048 CR3=00000000182d2000 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=35343a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000