syzkaller login: [ 30.697917] BUG: Bad rss-counter state mm:00000000f276052a type:MM_FILEPAGES val:33 [ 30.698714] BUG: Bad rss-counter state mm:00000000f276052a type:MM_ANONPAGES val:22 [ 30.831195] ================================================================== [ 30.831880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.832531] Read of size 8 at addr ffff888016a8cb38 by task sshd/220 [ 30.833187] [ 30.833348] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.834602] Call Trace: [ 30.834818] [ 30.834998] dump_stack_lvl+0x91/0xf0 [ 30.835619] print_report+0xcc/0x620 [ 30.836005] ? __virt_addr_valid+0x102/0x340 [ 30.836420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836824] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837230] kasan_report+0xbe/0xf0 [ 30.837539] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837977] vma_interval_tree_remove+0xc75/0xec0 [ 30.838357] vma_prepare+0xc54/0x11a0 [ 30.838656] __split_vma+0x5af/0x950 [ 30.838950] ? __pfx___split_vma+0x10/0x10 [ 30.839287] ? find_held_lock+0x2c/0x110 [ 30.839631] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.840015] ? lock_is_held_type+0x9f/0x120 [ 30.840365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.840763] ? mtree_range_walk+0x632/0x900 [ 30.841130] ? mas_walk+0x5c7/0x7c0 [ 30.841447] do_vmi_munmap+0x1f1/0x2b0 [ 30.841847] mmap_region+0x1f9/0x2660 [ 30.842175] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.842497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.842937] ? __pfx_lock_acquire+0x10/0x10 [ 30.843285] ? __pfx_mmap_region+0x10/0x10 [ 30.843615] ? security_mmap_addr+0x7d/0xa0 [ 30.843944] ? get_unmapped_area+0x1f5/0x3f0 [ 30.844281] do_mmap+0x854/0xf00 [ 30.844559] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.845239] ksys_mmap_pgoff+0x3af/0x500 [ 30.845567] do_syscall_64+0x3f/0x90 [ 30.845908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846323] RIP: 0033:0x7f302b206d82 [ 30.846619] 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 [ 30.848003] RSP: 002b:00007fff9e35a928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.848624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f302b206d82 [ 30.849205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f302a640000 [ 30.849796] RBP: 00007f302a640000 R08: 0000000000000009 R09: 0000000000001000 [ 30.850326] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587fb91df60 [ 30.850875] R13: 00007fff9e35a940 R14: 00007fff9e35a970 R15: 00007fff9e35acd0 [ 30.851453] [ 30.851634] [ 30.851768] Allocated by task 212: [ 30.852039] kasan_save_stack+0x22/0x50 [ 30.852383] kasan_set_track+0x25/0x30 [ 30.852710] __kasan_slab_alloc+0x59/0x70 [ 30.853060] kmem_cache_alloc+0x16b/0x370 [ 30.853398] vm_area_dup+0x20/0x160 [ 30.853687] __split_vma+0x170/0x950 [ 30.854029] split_vma+0xc6/0x110 [ 30.854323] mprotect_fixup+0x8d2/0xb30 [ 30.854654] do_mprotect_pkey+0x87e/0xd40 [ 30.854992] __x64_sys_mprotect+0x78/0xc0 [ 30.855319] do_syscall_64+0x3f/0x90 [ 30.855621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856028] [ 30.856170] Freed by task 19: [ 30.856414] kasan_save_stack+0x22/0x50 [ 30.856757] kasan_set_track+0x25/0x30 [ 30.857085] kasan_save_free_info+0x2b/0x50 [ 30.857437] __kasan_slab_free+0x10a/0x190 [ 30.857810] kmem_cache_free+0x10d/0x4d0 [ 30.858143] rcu_core+0x8c8/0x2860 [ 30.858441] __do_softirq+0x1b7/0x7d4 [ 30.858757] [ 30.858898] Last potentially related work creation: [ 30.859284] kasan_save_stack+0x22/0x50 [ 30.859607] __kasan_record_aux_stack+0x8e/0xa0 [ 30.859997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.860472] remove_vma+0x139/0x170 [ 30.860789] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.861176] do_vmi_munmap+0x1f1/0x2b0 [ 30.861507] __vm_munmap+0x138/0x3a0 [ 30.861870] __x64_sys_munmap+0x59/0x80 [ 30.862213] do_syscall_64+0x3f/0x90 [ 30.862526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862962] [ 30.863109] The buggy address belongs to the object at ffff888016a8cae0 [ 30.863109] which belongs to the cache vm_area_struct of size 168 [ 30.864058] The buggy address is located 88 bytes inside of [ 30.864058] freed 168-byte region [ffff888016a8cae0, ffff888016a8cb88) [ 30.865002] [ 30.865145] The buggy address belongs to the physical page: [ 30.865590] page:00000000b73c5fea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a8c [ 30.866350] memcg:ffff88800f213001 [ 30.866640] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.867094] page_type: 0xffffffff() [ 30.867424] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.868079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f213001 [ 30.868689] page dumped because: kasan: bad access detected [ 30.869142] [ 30.869292] Memory state around the buggy address: [ 30.869668] ffff888016a8ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.870247] ffff888016a8ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.870791] >ffff888016a8cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871343] ^ [ 30.871734] ffff888016a8cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.872293] ffff888016a8cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.872835] ================================================================== [ 30.873478] Disabling lock debugging due to kernel taint [ 32.353691] BUG: Bad rss-counter state mm:00000000f698fc32 type:MM_FILEPAGES val:33 [ 32.354407] BUG: Bad rss-counter state mm:00000000f698fc32 type:MM_ANONPAGES val:22 [ 32.710578] BUG: Bad rss-counter state mm:00000000ede58b97 type:MM_FILEPAGES val:33 [ 32.711317] BUG: Bad rss-counter state mm:00000000ede58b97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49973' (ECDSA) to the list of known hosts. 2023/06/21 09:46:45 fuzzer started 2023/06/21 09:46:45 dialing manager at localhost:36067 2023/06/21 09:46:45 checking machine... 2023/06/21 09:46:45 checking revisions... [ 33.261389] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:46:45 testing simple program... [ 33.293359] cgroup: Unknown subsys name 'net' [ 33.330118] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:46:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861390a8 RDX=1ffff11003446dfc RSI=1ffff11003446dfe RDI=1ffff11003446dfe RBP=ffff88801a236ff0 RSP=ffff88801a236f28 R8 =ffffffff861390ac R9 =ffff88801a236fd8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88801a236ff8 R13=ffff88801a236fe0 R14=ffff88801a237320 R15=ffff88801a236f98 RIP=ffffffff811310af 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 00007f99b4dac900 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=00007f99b4d8b020 CR3=000000000f398000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f738f713910 CR3=000000000d9b8000 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=2034343a36343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36343a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000