syzkaller login: [ 30.883235] BUG: Bad rss-counter state mm:00000000b0dcb7ac type:MM_FILEPAGES val:33 [ 30.884403] BUG: Bad rss-counter state mm:00000000b0dcb7ac type:MM_ANONPAGES val:22 [ 30.927712] ================================================================== [ 30.928831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.930048] Read of size 8 at addr ffff88800fdf7228 by task sshd/219 [ 30.930961] [ 30.931244] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.932272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.933264] Call Trace: [ 30.933579] [ 30.933861] dump_stack_lvl+0x91/0xf0 [ 30.934360] print_report+0xcc/0x620 [ 30.934838] ? __virt_addr_valid+0x102/0x340 [ 30.935395] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936625] kasan_report+0xbe/0xf0 [ 30.937109] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937742] vma_interval_tree_remove+0xc75/0xec0 [ 30.938343] vma_prepare+0xc54/0x11a0 [ 30.938824] __split_vma+0x5af/0x950 [ 30.939299] ? __pfx___split_vma+0x10/0x10 [ 30.939832] ? find_held_lock+0x2c/0x110 [ 30.940353] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.940939] ? lock_is_held_type+0x9f/0x120 [ 30.941484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.942094] ? mtree_range_walk+0x632/0x900 [ 30.942651] ? mas_walk+0x5c7/0x7c0 [ 30.943128] do_vmi_munmap+0x1f1/0x2b0 [ 30.943624] mmap_region+0x1f9/0x2660 [ 30.944105] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.944622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.945335] ? __pfx_lock_acquire+0x10/0x10 [ 30.945871] ? __pfx_mmap_region+0x10/0x10 [ 30.946393] ? security_mmap_addr+0x7d/0xa0 [ 30.946922] ? get_unmapped_area+0x1f5/0x3f0 [ 30.947466] do_mmap+0x854/0xf00 [ 30.947906] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.948401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.948970] ksys_mmap_pgoff+0x3af/0x500 [ 30.949480] do_syscall_64+0x3f/0x90 [ 30.949956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.950603] RIP: 0033:0x7fdbe3c6dd82 [ 30.951055] 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 [ 30.953166] RSP: 002b:00007fff1e551818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.954058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbe3c6dd82 [ 30.954899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbe30a7000 [ 30.955739] RBP: 00007fdbe30a7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.956589] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650e8c5aec0 [ 30.957435] R13: 00007fff1e551830 R14: 00007fff1e551860 R15: 00007fff1e551bc0 [ 30.958286] [ 30.958582] [ 30.958797] Allocated by task 212: [ 30.959226] kasan_save_stack+0x22/0x50 [ 30.959731] kasan_set_track+0x25/0x30 [ 30.960228] __kasan_slab_alloc+0x59/0x70 [ 30.960756] kmem_cache_alloc+0x16b/0x370 [ 30.961281] vm_area_dup+0x20/0x160 [ 30.961743] __split_vma+0x170/0x950 [ 30.962207] split_vma+0xc6/0x110 [ 30.962648] mprotect_fixup+0x8d2/0xb30 [ 30.963144] do_mprotect_pkey+0x87e/0xd40 [ 30.963670] __x64_sys_mprotect+0x78/0xc0 [ 30.964192] do_syscall_64+0x3f/0x90 [ 30.964663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965321] [ 30.965536] Freed by task 13: [ 30.965915] kasan_save_stack+0x22/0x50 [ 30.966413] kasan_set_track+0x25/0x30 [ 30.966905] kasan_save_free_info+0x2b/0x50 [ 30.967436] __kasan_slab_free+0x10a/0x190 [ 30.967966] kmem_cache_free+0x10d/0x4d0 [ 30.968468] rcu_core+0x8c8/0x2860 [ 30.968919] __do_softirq+0x1b7/0x7d4 [ 30.969401] [ 30.969618] Last potentially related work creation: [ 30.970255] kasan_save_stack+0x22/0x50 [ 30.970757] __kasan_record_aux_stack+0x8e/0xa0 [ 30.971325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.971962] remove_vma+0x139/0x170 [ 30.972415] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.972985] do_vmi_munmap+0x1f1/0x2b0 [ 30.973477] __vm_munmap+0x138/0x3a0 [ 30.973939] __x64_sys_munmap+0x59/0x80 [ 30.974436] do_syscall_64+0x3f/0x90 [ 30.974907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975561] [ 30.975777] The buggy address belongs to the object at ffff88800fdf71d0 [ 30.975777] which belongs to the cache vm_area_struct of size 168 [ 30.977253] The buggy address is located 88 bytes inside of [ 30.977253] freed 168-byte region [ffff88800fdf71d0, ffff88800fdf7278) [ 30.978663] [ 30.978876] The buggy address belongs to the physical page: [ 30.979538] page:000000009e344f5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf7 [ 30.980606] memcg:ffff88800c842c01 [ 30.981051] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.981700] page_type: 0xffffffff() [ 30.982147] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.983055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c842c01 [ 30.983951] page dumped because: kasan: bad access detected [ 30.984615] [ 30.984839] Memory state around the buggy address: [ 30.985416] ffff88800fdf7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.986270] ffff88800fdf7180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.987125] >ffff88800fdf7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.987971] ^ [ 30.988535] ffff88800fdf7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.989386] ffff88800fdf7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.990233] ================================================================== [ 30.991219] Disabling lock debugging due to kernel taint [ 33.405088] BUG: Bad rss-counter state mm:00000000e6ebd5d5 type:MM_FILEPAGES val:33 [ 33.406067] BUG: Bad rss-counter state mm:00000000e6ebd5d5 type:MM_ANONPAGES val:22 [ 33.860061] BUG: Bad rss-counter state mm:00000000edf0977c type:MM_FILEPAGES val:33 [ 33.861976] BUG: Bad rss-counter state mm:00000000edf0977c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24943' (ECDSA) to the list of known hosts. 2023/06/20 17:19:09 fuzzer started 2023/06/20 17:19:09 dialing manager at localhost:36067 2023/06/20 17:19:09 checking machine... 2023/06/20 17:19:09 checking revisions... [ 34.618411] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:19:09 testing simple program... [ 34.670628] cgroup: Unknown subsys name 'net' [ 34.727166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:19:08 Registers: info registers vcpu 0 RAX=ffffffff83640612 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003406ea3 RSI=ffff88801a037c80 RDI=ffffffff83640612 RBP=ffff88801a037518 RSP=ffff88801a0374b0 R8 =0000000000000001 R9 =ffff88801a037500 R10=0000000000038001 R11=000000000008a84f R12=ffff88801a037588 R13=0000000000000000 R14=ffff88800fe151c0 R15=1ffff11003406f1d RIP=ffffffff811303b9 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 00007fb2ea812700 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=00007f1875fb8650 CR3=0000000014706000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34333134332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007f20ade155a0 CR3=0000000008c6c000 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=399e045449b0a9b52545e14be1f60c89 XMM02=00000000001200e0ec2efd57dc4c00df XMM03=0000000000123248523af6b55aacc9c2 XMM04=a19e495e7730924700000000000ae988 XMM05=19e9129bd510f23500000000001330b0 XMM06=aa22a1247bd557f40000000000131f18 XMM07=e042d86d42eb936e0000000000123c30 XMM08=523af6b55aacc9c20000000000120140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000