syzkaller login: [ 37.701015] BUG: Bad rss-counter state mm:000000000bee8d00 type:MM_FILEPAGES val:33 [ 37.702522] BUG: Bad rss-counter state mm:000000000bee8d00 type:MM_ANONPAGES val:22 [ 37.862053] ================================================================== [ 37.862982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.863938] Read of size 8 at addr ffff88800c95c4e0 by task sshd/220 [ 37.864705] [ 37.864931] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.865934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.866954] Call Trace: [ 37.867297] [ 37.867586] dump_stack_lvl+0x91/0xf0 [ 37.868072] print_report+0xcc/0x620 [ 37.868560] ? __virt_addr_valid+0x102/0x340 [ 37.869118] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.869746] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.870379] kasan_report+0xbe/0xf0 [ 37.870860] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.871507] vma_interval_tree_remove+0xc75/0xec0 [ 37.872137] vma_prepare+0xc54/0x11a0 [ 37.872637] __split_vma+0x5af/0x950 [ 37.873130] ? __pfx___split_vma+0x10/0x10 [ 37.873674] ? find_held_lock+0x2c/0x110 [ 37.874221] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.874836] ? lock_is_held_type+0x9f/0x120 [ 37.875403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.876037] ? mtree_range_walk+0x632/0x900 [ 37.876614] ? mas_walk+0x5c7/0x7c0 [ 37.877113] do_vmi_munmap+0x1f1/0x2b0 [ 37.877624] mmap_region+0x1f9/0x2660 [ 37.878135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.878690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.879447] ? __pfx_lock_acquire+0x10/0x10 [ 37.880006] ? __pfx_mmap_region+0x10/0x10 [ 37.880562] ? security_mmap_addr+0x7d/0xa0 [ 37.881124] ? get_unmapped_area+0x1f5/0x3f0 [ 37.881676] do_mmap+0x854/0xf00 [ 37.882118] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.882632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.883222] ksys_mmap_pgoff+0x3af/0x500 [ 37.883749] do_syscall_64+0x3f/0x90 [ 37.884256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.884929] RIP: 0033:0x7f22f2de4d82 [ 37.885410] 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 [ 37.887682] RSP: 002b:00007fff9a691be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.888630] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22f2de4d82 [ 37.889528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22f221e000 [ 37.890447] RBP: 00007f22f221e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.891336] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560652123ec0 [ 37.892231] R13: 00007fff9a691c00 R14: 00007fff9a691c30 R15: 00007fff9a691f90 [ 37.893125] [ 37.893432] [ 37.893661] Allocated by task 213: [ 37.894114] kasan_save_stack+0x22/0x50 [ 37.894649] kasan_set_track+0x25/0x30 [ 37.895165] __kasan_slab_alloc+0x59/0x70 [ 37.895710] kmem_cache_alloc+0x16b/0x370 [ 37.896253] vm_area_dup+0x20/0x160 [ 37.896732] __split_vma+0x170/0x950 [ 37.897216] split_vma+0xc6/0x110 [ 37.897674] mprotect_fixup+0x8d2/0xb30 [ 37.898203] do_mprotect_pkey+0x87e/0xd40 [ 37.898780] __x64_sys_mprotect+0x78/0xc0 [ 37.899334] do_syscall_64+0x3f/0x90 [ 37.899833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.900508] [ 37.900731] Freed by task 213: [ 37.901141] kasan_save_stack+0x22/0x50 [ 37.901663] kasan_set_track+0x25/0x30 [ 37.902184] kasan_save_free_info+0x2b/0x50 [ 37.902755] __kasan_slab_free+0x10a/0x190 [ 37.903316] kmem_cache_free+0x10d/0x4d0 [ 37.903849] rcu_core+0x8c8/0x2860 [ 37.904323] __do_softirq+0x1b7/0x7d4 [ 37.904818] [ 37.905043] Last potentially related work creation: [ 37.905655] kasan_save_stack+0x22/0x50 [ 37.906186] __kasan_record_aux_stack+0x8e/0xa0 [ 37.906804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.907475] remove_vma+0x139/0x170 [ 37.907953] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.908532] do_vmi_munmap+0x1f1/0x2b0 [ 37.909039] __vm_munmap+0x138/0x3a0 [ 37.909529] __x64_sys_munmap+0x59/0x80 [ 37.910052] do_syscall_64+0x3f/0x90 [ 37.910556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.911230] [ 37.911457] Second to last potentially related work creation: [ 37.912177] kasan_save_stack+0x22/0x50 [ 37.912705] __kasan_record_aux_stack+0x8e/0xa0 [ 37.913306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.913984] remove_vma+0x139/0x170 [ 37.914475] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.915062] do_vmi_munmap+0x1f1/0x2b0 [ 37.915572] mmap_region+0x1f9/0x2660 [ 37.916067] do_mmap+0x854/0xf00 [ 37.916514] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.917031] ksys_mmap_pgoff+0x3af/0x500 [ 37.917558] do_syscall_64+0x3f/0x90 [ 37.918055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.918739] [ 37.918965] The buggy address belongs to the object at ffff88800c95c488 [ 37.918965] which belongs to the cache vm_area_struct of size 168 [ 37.920514] The buggy address is located 88 bytes inside of [ 37.920514] freed 168-byte region [ffff88800c95c488, ffff88800c95c530) [ 37.922007] [ 37.922237] The buggy address belongs to the physical page: [ 37.922944] page:00000000bd2edffa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc95c [ 37.924094] memcg:ffff88800d833501 [ 37.924540] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.925226] page_type: 0xffffffff() [ 37.925708] raw: 0100000000000200 ffff88800879fc80 ffffea0000392500 dead000000000006 [ 37.926697] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d833501 [ 37.927655] page dumped because: kasan: bad access detected [ 37.928350] [ 37.928572] Memory state around the buggy address: [ 37.929181] ffff88800c95c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.930085] ffff88800c95c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.931002] >ffff88800c95c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.931898] ^ [ 37.932695] ffff88800c95c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 37.933589] ffff88800c95c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.934516] ================================================================== [ 37.935830] Disabling lock debugging due to kernel taint [ 39.753157] BUG: Bad rss-counter state mm:00000000c32313c9 type:MM_FILEPAGES val:33 [ 39.754412] BUG: Bad rss-counter state mm:00000000c32313c9 type:MM_ANONPAGES val:22 [ 40.206967] BUG: Bad rss-counter state mm:00000000a3258f6d type:MM_FILEPAGES val:33 [ 40.207966] BUG: Bad rss-counter state mm:00000000a3258f6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29419' (ECDSA) to the list of known hosts. 2023/06/19 19:22:14 fuzzer started 2023/06/19 19:22:15 dialing manager at localhost:44161 2023/06/19 19:22:15 checking machine... 2023/06/19 19:22:15 checking revisions... [ 40.932750] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:22:15 testing simple program... [ 40.984501] cgroup: Unknown subsys name 'net' [ 41.028655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002b5c74f RSI=ffffffff814c84fa RDI=ffff888015ae3a78 RBP=ffff888015ae3680 RSP=ffff888017fef5b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888015ae3680 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000092cc0 RIP=ffffffff81374526 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 00007f1a44cf4900 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=00007f1a452ab618 CR3=000000000e498000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff864b1158 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff864b115a RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e27dc8 R15=ffff88806cf09a98 RIP=ffffffff811311fc RFL=00000293 [--S-A-C] 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=00007f7eedc29bd0 CR3=000000000fd06000 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=2034313a32323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000