syzkaller login: [ 31.174769] BUG: Bad rss-counter state mm:000000003b382d17 type:MM_FILEPAGES val:33 [ 31.175980] BUG: Bad rss-counter state mm:000000003b382d17 type:MM_ANONPAGES val:22 [ 31.215972] ================================================================== [ 31.217102] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.218246] Read of size 8 at addr ffff88800dd4e880 by task sshd/220 [ 31.219074] [ 31.219328] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.220343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.221519] Call Trace: [ 31.221893] [ 31.222192] dump_stack_lvl+0x91/0xf0 [ 31.222804] print_report+0xcc/0x620 [ 31.223384] ? __virt_addr_valid+0x102/0x340 [ 31.223952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.224759] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225435] kasan_report+0xbe/0xf0 [ 31.225921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226541] vma_interval_tree_remove+0xc75/0xec0 [ 31.227199] vma_prepare+0xc54/0x11a0 [ 31.227681] __split_vma+0x5af/0x950 [ 31.228153] ? __pfx___split_vma+0x10/0x10 [ 31.228739] ? find_held_lock+0x2c/0x110 [ 31.229278] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.229895] ? lock_is_held_type+0x9f/0x120 [ 31.230443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.231067] ? mtree_range_walk+0x632/0x900 [ 31.231657] ? mas_walk+0x5c7/0x7c0 [ 31.232133] do_vmi_munmap+0x1f1/0x2b0 [ 31.232631] mmap_region+0x1f9/0x2660 [ 31.233159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.233675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.234412] ? __pfx_lock_acquire+0x10/0x10 [ 31.234972] ? __pfx_mmap_region+0x10/0x10 [ 31.235522] ? security_mmap_addr+0x7d/0xa0 [ 31.236114] ? get_unmapped_area+0x1f5/0x3f0 [ 31.236662] do_mmap+0x854/0xf00 [ 31.237108] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.238184] ksys_mmap_pgoff+0x3af/0x500 [ 31.238694] do_syscall_64+0x3f/0x90 [ 31.239194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239849] RIP: 0033:0x7f7ab1f32d82 [ 31.240360] 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 [ 31.242575] RSP: 002b:00007fff5c2bf118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.243495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ab1f32d82 [ 31.244347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ab136c000 [ 31.245195] RBP: 00007f7ab136c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.246040] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e78351b20 [ 31.246873] R13: 00007fff5c2bf130 R14: 00007fff5c2bf160 R15: 00007fff5c2bf4c0 [ 31.247737] [ 31.248033] [ 31.248247] Allocated by task 213: [ 31.248674] kasan_save_stack+0x22/0x50 [ 31.249217] kasan_set_track+0x25/0x30 [ 31.249840] __kasan_slab_alloc+0x59/0x70 [ 31.250368] kmem_cache_alloc+0x16b/0x370 [ 31.250881] vm_area_dup+0x20/0x160 [ 31.251356] __split_vma+0x170/0x950 [ 31.251828] split_vma+0xc6/0x110 [ 31.252262] mprotect_fixup+0x8d2/0xb30 [ 31.252764] do_mprotect_pkey+0x87e/0xd40 [ 31.253291] __x64_sys_mprotect+0x78/0xc0 [ 31.253809] do_syscall_64+0x3f/0x90 [ 31.254295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254940] [ 31.255177] Freed by task 213: [ 31.255571] kasan_save_stack+0x22/0x50 [ 31.256075] kasan_set_track+0x25/0x30 [ 31.256585] kasan_save_free_info+0x2b/0x50 [ 31.257256] __kasan_slab_free+0x10a/0x190 [ 31.257797] kmem_cache_free+0x10d/0x4d0 [ 31.258309] rcu_core+0x8c8/0x2860 [ 31.258763] __do_softirq+0x1b7/0x7d4 [ 31.259256] [ 31.259479] Last potentially related work creation: [ 31.260073] kasan_save_stack+0x22/0x50 [ 31.260636] __kasan_record_aux_stack+0x8e/0xa0 [ 31.261211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.261850] remove_vma+0x139/0x170 [ 31.262299] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.262855] do_vmi_munmap+0x1f1/0x2b0 [ 31.263361] __vm_munmap+0x138/0x3a0 [ 31.263829] __x64_sys_munmap+0x59/0x80 [ 31.264331] do_syscall_64+0x3f/0x90 [ 31.264805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265446] [ 31.265664] Second to last potentially related work creation: [ 31.266347] kasan_save_stack+0x22/0x50 [ 31.266847] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.268078] remove_vma+0x139/0x170 [ 31.268529] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.269086] do_vmi_munmap+0x1f1/0x2b0 [ 31.269572] mmap_region+0x1f9/0x2660 [ 31.270044] do_mmap+0x854/0xf00 [ 31.270471] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270968] ksys_mmap_pgoff+0x3af/0x500 [ 31.271584] do_syscall_64+0x3f/0x90 [ 31.272217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272878] [ 31.273095] The buggy address belongs to the object at ffff88800dd4e828 [ 31.273095] which belongs to the cache vm_area_struct of size 168 [ 31.274571] The buggy address is located 88 bytes inside of [ 31.274571] freed 168-byte region [ffff88800dd4e828, ffff88800dd4e8d0) [ 31.276007] [ 31.276225] The buggy address belongs to the physical page: [ 31.276879] page:000000008314826a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd4e [ 31.277957] memcg:ffff88800d55ba01 [ 31.278383] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.279039] page_type: 0xffffffff() [ 31.279492] raw: 0100000000000200 ffff8880087a0c80 ffffea0000568f00 dead000000000004 [ 31.280412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d55ba01 [ 31.281321] page dumped because: kasan: bad access detected [ 31.281981] [ 31.282198] Memory state around the buggy address: [ 31.282780] ffff88800dd4e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.283650] ffff88800dd4e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.284513] >ffff88800dd4e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.285359] ^ [ 31.285772] ffff88800dd4e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.286896] ffff88800dd4e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.287778] ================================================================== [ 31.288888] Disabling lock debugging due to kernel taint [ 33.566888] BUG: Bad rss-counter state mm:00000000ad56383a type:MM_FILEPAGES val:33 [ 33.568085] BUG: Bad rss-counter state mm:00000000ad56383a type:MM_ANONPAGES val:22 [ 33.961078] BUG: Bad rss-counter state mm:00000000d1091011 type:MM_FILEPAGES val:33 [ 33.962020] BUG: Bad rss-counter state mm:00000000d1091011 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28693' (ECDSA) to the list of known hosts. 2023/06/20 16:37:40 fuzzer started 2023/06/20 16:37:41 dialing manager at localhost:36067 2023/06/20 16:37:41 checking machine... 2023/06/20 16:37:41 checking revisions... [ 34.653326] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:37:41 testing simple program... [ 34.715329] cgroup: Unknown subsys name 'net' [ 34.759459] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:37:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801ce57408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000009a0000009a0 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007f3b191a7900 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=00007ffe5ad3c000 CR3=0000000019caa000 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=1ffffffff0bbfc18 RBX=ffffffff85dfe0c4 RCX=ffffffff8180ca59 RDX=0000000000000000 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffffffff85dfe0a0 RSP=ffff88806cf099e0 R8 =ffffffff86138f52 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffffffff85dfe0e8 R13=ffffffff85dfe0a0 R14=ffffffff85dfe0a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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=00007f016f14feb0 CR3=00000000167fe000 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=2030343a37333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000