syzkaller login: [ 23.739446] BUG: Bad rss-counter state mm:000000004e59d3b7 type:MM_FILEPAGES val:33 [ 23.740476] BUG: Bad rss-counter state mm:000000004e59d3b7 type:MM_ANONPAGES val:22 [ 23.896927] ================================================================== [ 23.898017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.899158] Read of size 8 at addr ffff88800ef6dd08 by task sshd/218 [ 23.900107] [ 23.900332] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.901234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.902255] Call Trace: [ 23.902577] [ 23.902876] dump_stack_lvl+0x91/0xf0 [ 23.903374] print_report+0xcc/0x620 [ 23.903866] ? __virt_addr_valid+0x102/0x340 [ 23.904441] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.905075] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.905702] kasan_report+0xbe/0xf0 [ 23.906203] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.906847] vma_interval_tree_remove+0xc75/0xec0 [ 23.907459] vma_prepare+0xc54/0x11a0 [ 23.907953] __split_vma+0x5af/0x950 [ 23.908436] ? __pfx___split_vma+0x10/0x10 [ 23.908976] ? find_held_lock+0x2c/0x110 [ 23.909509] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.910077] ? lock_is_held_type+0x9f/0x120 [ 23.910623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.911267] ? mtree_range_walk+0x632/0x900 [ 23.911822] ? mas_walk+0x5c7/0x7c0 [ 23.912303] do_vmi_munmap+0x1f1/0x2b0 [ 23.912808] mmap_region+0x1f9/0x2660 [ 23.913303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.913821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.914551] ? __pfx_lock_acquire+0x10/0x10 [ 23.915098] ? __pfx_mmap_region+0x10/0x10 [ 23.915640] ? security_mmap_addr+0x7d/0xa0 [ 23.916171] ? get_unmapped_area+0x1f5/0x3f0 [ 23.916730] do_mmap+0x854/0xf00 [ 23.917184] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.917697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.918264] ksys_mmap_pgoff+0x3af/0x500 [ 23.918794] do_syscall_64+0x3f/0x90 [ 23.919275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.919924] RIP: 0033:0x7fb994624d82 [ 23.920389] 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 [ 23.922515] RSP: 002b:00007fff530d7ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.923448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb994624d82 [ 23.924302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb993a5e000 [ 23.925154] RBP: 00007fb993a5e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.926003] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562244004ec0 [ 23.926858] R13: 00007fff530d7d00 R14: 00007fff530d7d30 R15: 00007fff530d8090 [ 23.927729] [ 23.928032] [ 23.928254] Allocated by task 211: [ 23.928680] kasan_save_stack+0x22/0x50 [ 23.929190] kasan_set_track+0x25/0x30 [ 23.929686] __kasan_slab_alloc+0x59/0x70 [ 23.930218] kmem_cache_alloc+0x16b/0x370 [ 23.930745] vm_area_dup+0x20/0x160 [ 23.931205] __split_vma+0x170/0x950 [ 23.931672] split_vma+0xc6/0x110 [ 23.932117] mprotect_fixup+0x8d2/0xb30 [ 23.932625] do_mprotect_pkey+0x87e/0xd40 [ 23.933153] __x64_sys_mprotect+0x78/0xc0 [ 23.933675] do_syscall_64+0x3f/0x90 [ 23.934156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.934824] [ 23.935039] Freed by task 211: [ 23.935437] kasan_save_stack+0x22/0x50 [ 23.935944] kasan_set_track+0x25/0x30 [ 23.936442] kasan_save_free_info+0x2b/0x50 [ 23.936974] __kasan_slab_free+0x10a/0x190 [ 23.937518] kmem_cache_free+0x10d/0x4d0 [ 23.938031] rcu_core+0x8c8/0x2860 [ 23.938492] __do_softirq+0x1b7/0x7d4 [ 23.938988] [ 23.939217] Last potentially related work creation: [ 23.939817] kasan_save_stack+0x22/0x50 [ 23.940335] __kasan_record_aux_stack+0x8e/0xa0 [ 23.941001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.941651] remove_vma+0x139/0x170 [ 23.942106] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.942676] do_vmi_munmap+0x1f1/0x2b0 [ 23.943195] __vm_munmap+0x138/0x3a0 [ 23.943668] __x64_sys_munmap+0x59/0x80 [ 23.944177] do_syscall_64+0x3f/0x90 [ 23.944663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945316] [ 23.945538] Second to last potentially related work creation: [ 23.946244] kasan_save_stack+0x22/0x50 [ 23.946755] __kasan_record_aux_stack+0x8e/0xa0 [ 23.947351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.947999] remove_vma+0x139/0x170 [ 23.948462] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.949021] do_vmi_munmap+0x1f1/0x2b0 [ 23.949513] mmap_region+0x1f9/0x2660 [ 23.950002] do_mmap+0x854/0xf00 [ 23.950443] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.950948] ksys_mmap_pgoff+0x3af/0x500 [ 23.951458] do_syscall_64+0x3f/0x90 [ 23.951941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.952597] [ 23.952823] The buggy address belongs to the object at ffff88800ef6dcb0 [ 23.952823] which belongs to the cache vm_area_struct of size 168 [ 23.954324] The buggy address is located 88 bytes inside of [ 23.954324] freed 168-byte region [ffff88800ef6dcb0, ffff88800ef6dd58) [ 23.955777] [ 23.955999] The buggy address belongs to the physical page: [ 23.956669] page:00000000b0d043f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef6d [ 23.957768] memcg:ffff88800eb55e01 [ 23.958202] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.958877] page_type: 0xffffffff() [ 23.959339] raw: 0100000000000200 ffff8880087a0c80 ffffea0000310380 dead000000000008 [ 23.960275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb55e01 [ 23.961193] page dumped because: kasan: bad access detected [ 23.961869] [ 23.962093] Memory state around the buggy address: [ 23.962689] ffff88800ef6dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.963582] ffff88800ef6dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.964459] >ffff88800ef6dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.965323] ^ [ 23.965783] ffff88800ef6dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.966671] ffff88800ef6de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 23.967575] ================================================================== [ 23.968543] Disabling lock debugging due to kernel taint [ 25.871584] BUG: Bad rss-counter state mm:00000000739a537c type:MM_FILEPAGES val:33 [ 25.873035] BUG: Bad rss-counter state mm:00000000739a537c type:MM_ANONPAGES val:22 [ 26.355446] BUG: Bad rss-counter state mm:00000000f3dc9963 type:MM_FILEPAGES val:33 [ 26.356441] BUG: Bad rss-counter state mm:00000000f3dc9963 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31313' (ECDSA) to the list of known hosts. 2023/06/20 13:29:04 fuzzer started 2023/06/20 13:29:04 dialing manager at localhost:36067 2023/06/20 13:29:04 checking machine... 2023/06/20 13:29:04 checking revisions... [ 27.068728] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:29:04 testing simple program... [ 27.130602] cgroup: Unknown subsys name 'net' [ 27.174850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:29:04 Registers: info registers vcpu 0 RAX=00007f40dbff7710 RBX=000000000000001f RCX=0000000000000400 RDX=00005647b4364770 RSI=00005647b4364740 RDI=00005647b4364770 RBP=00005647b4364770 RSP=00007fffd0693de8 R8 =00007f40dbff76f8 R9 =00007f40dc5a9be0 R10=0000000040000000 R11=0000000000000246 R12=00005647b436bed0 R13=00007f40dbff76f8 R14=0000000000000400 R15=0000000000000400 RIP=00007f40dc4b5b90 RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f40dbff7900 00000000 00000000 GS =0000 0000000000000000 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=00007f40dc5af0b0 CR3=000000001a3a2000 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=2f3a746f6f723a303a303a3a746f6f72 XMM01=0a687361622f6e69622f3a746f6f722f XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=ffff888008c04400 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=00007ff639945190 CR3=000000000d24c000 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=c4a2149a4b2531a69643e29ab8251229 XMM02=ec2efd57dc4c00df000000000011bb78 XMM03=52fa62a5a722b07a000000000011bc48 XMM04=d3220dafb921c1c100000000000ae988 XMM05=08d5f38ea1013aa300000000001345a8 XMM06=bdf2e299e47b49d500000000001332d8 XMM07=e042d86d42eb936e00000000001225b0 XMM08=52fa62a5a722b07a000000000011bc48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000