syzkaller login: [ 33.681605] BUG: Bad rss-counter state mm:000000006bf1747c type:MM_FILEPAGES val:33 [ 33.682843] BUG: Bad rss-counter state mm:000000006bf1747c type:MM_ANONPAGES val:22 [ 33.864998] ================================================================== [ 33.865978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.866974] Read of size 8 at addr ffff88800caa1968 by task sshd/221 [ 33.867866] [ 33.868182] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.869134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.870193] Call Trace: [ 33.870527] [ 33.870824] dump_stack_lvl+0x91/0xf0 [ 33.871371] print_report+0xcc/0x620 [ 33.871881] ? __virt_addr_valid+0x102/0x340 [ 33.872486] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.873162] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.873862] kasan_report+0xbe/0xf0 [ 33.874392] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.875033] vma_interval_tree_remove+0xc75/0xec0 [ 33.875683] vma_prepare+0xc54/0x11a0 [ 33.876205] __split_vma+0x5af/0x950 [ 33.876700] ? __pfx___split_vma+0x10/0x10 [ 33.877259] ? find_held_lock+0x2c/0x110 [ 33.877828] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.878454] ? lock_is_held_type+0x9f/0x120 [ 33.879006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.879644] ? mtree_range_walk+0x632/0x900 [ 33.880227] ? mas_walk+0x5c7/0x7c0 [ 33.880722] do_vmi_munmap+0x1f1/0x2b0 [ 33.881249] mmap_region+0x1f9/0x2660 [ 33.881776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.882344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.883095] ? __pfx_lock_acquire+0x10/0x10 [ 33.883640] ? __pfx_mmap_region+0x10/0x10 [ 33.884200] ? security_mmap_addr+0x7d/0xa0 [ 33.884766] ? get_unmapped_area+0x1f5/0x3f0 [ 33.885364] do_mmap+0x854/0xf00 [ 33.885856] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.886404] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.886987] ksys_mmap_pgoff+0x3af/0x500 [ 33.887525] do_syscall_64+0x3f/0x90 [ 33.888010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.888774] RIP: 0033:0x7f03eda5bd82 [ 33.889395] 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 [ 33.892398] RSP: 002b:00007fff5b9f16f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.893533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03eda5bd82 [ 33.894465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03ece95000 [ 33.895358] RBP: 00007f03ece95000 R08: 0000000000000009 R09: 0000000000001000 [ 33.896253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbf2c97ec0 [ 33.897152] R13: 00007fff5b9f1710 R14: 00007fff5b9f1740 R15: 00007fff5b9f1aa0 [ 33.898061] [ 33.898420] [ 33.898651] Allocated by task 213: [ 33.899115] kasan_save_stack+0x22/0x50 [ 33.899649] kasan_set_track+0x25/0x30 [ 33.900198] __kasan_slab_alloc+0x59/0x70 [ 33.900745] kmem_cache_alloc+0x16b/0x370 [ 33.901301] vm_area_dup+0x20/0x160 [ 33.901814] __split_vma+0x170/0x950 [ 33.902325] split_vma+0xc6/0x110 [ 33.902778] mprotect_fixup+0x8d2/0xb30 [ 33.903312] do_mprotect_pkey+0x87e/0xd40 [ 33.903858] __x64_sys_mprotect+0x78/0xc0 [ 33.904421] do_syscall_64+0x3f/0x90 [ 33.904917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.905611] [ 33.905842] Freed by task 213: [ 33.906280] kasan_save_stack+0x22/0x50 [ 33.906794] kasan_set_track+0x25/0x30 [ 33.907318] kasan_save_free_info+0x2b/0x50 [ 33.907869] __kasan_slab_free+0x10a/0x190 [ 33.908437] kmem_cache_free+0x10d/0x4d0 [ 33.908964] rcu_core+0x8c8/0x2860 [ 33.909447] __do_softirq+0x1b7/0x7d4 [ 33.909964] [ 33.910225] Last potentially related work creation: [ 33.910836] kasan_save_stack+0x22/0x50 [ 33.911384] __kasan_record_aux_stack+0x8e/0xa0 [ 33.911992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.912651] remove_vma+0x139/0x170 [ 33.913152] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.913757] do_vmi_munmap+0x1f1/0x2b0 [ 33.914294] __vm_munmap+0x138/0x3a0 [ 33.914791] __x64_sys_munmap+0x59/0x80 [ 33.915325] do_syscall_64+0x3f/0x90 [ 33.915805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.916490] [ 33.916716] The buggy address belongs to the object at ffff88800caa1910 [ 33.916716] which belongs to the cache vm_area_struct of size 168 [ 33.918287] The buggy address is located 88 bytes inside of [ 33.918287] freed 168-byte region [ffff88800caa1910, ffff88800caa19b8) [ 33.919760] [ 33.919993] The buggy address belongs to the physical page: [ 33.920687] page:00000000c29d5ee5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaa1 [ 33.921869] memcg:ffff8880165b8001 [ 33.922335] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.923076] page_type: 0xffffffff() [ 33.923551] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.924524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165b8001 [ 33.925536] page dumped because: kasan: bad access detected [ 33.926290] [ 33.926521] Memory state around the buggy address: [ 33.927137] ffff88800caa1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.928043] ffff88800caa1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.928972] >ffff88800caa1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.929921] ^ [ 33.930773] ffff88800caa1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.931691] ffff88800caa1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.932628] ================================================================== [ 33.933982] Disabling lock debugging due to kernel taint [ 35.818606] BUG: Bad rss-counter state mm:00000000c3f76cda type:MM_FILEPAGES val:33 [ 35.819347] BUG: Bad rss-counter state mm:00000000c3f76cda type:MM_ANONPAGES val:22 [ 36.293035] BUG: Bad rss-counter state mm:00000000fc245113 type:MM_FILEPAGES val:33 [ 36.294066] BUG: Bad rss-counter state mm:00000000fc245113 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27163' (ECDSA) to the list of known hosts. 2023/06/20 06:03:53 fuzzer started 2023/06/20 06:03:54 dialing manager at localhost:44161 2023/06/20 06:03:54 checking machine... 2023/06/20 06:03:54 checking revisions... [ 37.012819] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:54 testing simple program... [ 37.057381] cgroup: Unknown subsys name 'net' [ 37.105542] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f8478c8 RCX=0000000000000001 RDX=1ffff11001f08f1b RSI=ffff88800f847f38 RDI=ffff88800f8478d8 RBP=ffff88800f847f38 RSP=ffff88800f847820 R8 =ffffffff864b1648 R9 =ffff88800f847908 R10=0000000000038001 R11=00000000000b5311 R12=0000000000000008 R13=ffff88800f840000 R14=ffff88800f847f40 R15=ffff88800f8478c8 RIP=ffffffff81130468 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 00007fbd8aff5900 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=00007ffd9aeec000 CR3=0000000015d2a000 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=563412feff00545000000000000080fe 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4469698ec0 CR3=000000000d75e000 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=2033353a33303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000