syzkaller login: [ 32.518698] BUG: Bad rss-counter state mm:000000002452dafd type:MM_FILEPAGES val:33 [ 32.519878] BUG: Bad rss-counter state mm:000000002452dafd type:MM_ANONPAGES val:22 [ 32.557664] ================================================================== [ 32.558714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.559842] Read of size 8 at addr ffff888015baf058 by task sshd/220 [ 32.560698] [ 32.560918] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.561926] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.562911] Call Trace: [ 32.563243] <TASK> [ 32.563532] dump_stack_lvl+0x91/0xf0 [ 32.564040] print_report+0xcc/0x620 [ 32.564541] ? __virt_addr_valid+0x102/0x340 [ 32.565109] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.565732] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.566375] kasan_report+0xbe/0xf0 [ 32.566870] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.567538] vma_interval_tree_remove+0xc75/0xec0 [ 32.568149] vma_prepare+0xc54/0x11a0 [ 32.568628] __split_vma+0x5af/0x950 [ 32.569098] ? __pfx___split_vma+0x10/0x10 [ 32.569629] ? find_held_lock+0x2c/0x110 [ 32.570157] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.570723] ? lock_is_held_type+0x9f/0x120 [ 32.571275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.571884] ? mtree_range_walk+0x632/0x900 [ 32.572434] ? mas_walk+0x5c7/0x7c0 [ 32.572905] do_vmi_munmap+0x1f1/0x2b0 [ 32.573405] mmap_region+0x1f9/0x2660 [ 32.573884] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.574394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.575125] ? __pfx_lock_acquire+0x10/0x10 [ 32.575674] ? __pfx_mmap_region+0x10/0x10 [ 32.576213] ? security_mmap_addr+0x7d/0xa0 [ 32.576769] ? get_unmapped_area+0x1f5/0x3f0 [ 32.577327] do_mmap+0x854/0xf00 [ 32.577764] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.578272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.578835] ksys_mmap_pgoff+0x3af/0x500 [ 32.579372] do_syscall_64+0x3f/0x90 [ 32.579862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.580525] RIP: 0033:0x7f86b400ad82 [ 32.580988] 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 [ 32.583128] RSP: 002b:00007ffdd55c38b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.584026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86b400ad82 [ 32.584875] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86b3444000 [ 32.585715] RBP: 00007f86b3444000 R08: 0000000000000009 R09: 0000000000001000 [ 32.586561] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600db864ec0 [ 32.587409] R13: 00007ffdd55c38d0 R14: 00007ffdd55c3900 R15: 00007ffdd55c3c60 [ 32.588268] </TASK> [ 32.588562] [ 32.588778] Allocated by task 213: [ 32.589215] kasan_save_stack+0x22/0x50 [ 32.589721] kasan_set_track+0x25/0x30 [ 32.590218] __kasan_slab_alloc+0x59/0x70 [ 32.590745] kmem_cache_alloc+0x16b/0x370 [ 32.591278] vm_area_dup+0x20/0x160 [ 32.591734] __split_vma+0x170/0x950 [ 32.592197] split_vma+0xc6/0x110 [ 32.592634] mprotect_fixup+0x8d2/0xb30 [ 32.593134] do_mprotect_pkey+0x87e/0xd40 [ 32.593660] __x64_sys_mprotect+0x78/0xc0 [ 32.594184] do_syscall_64+0x3f/0x90 [ 32.594663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.595312] [ 32.595528] Freed by task 213: [ 32.595917] kasan_save_stack+0x22/0x50 [ 32.596424] kasan_set_track+0x25/0x30 [ 32.596914] kasan_save_free_info+0x2b/0x50 [ 32.597449] __kasan_slab_free+0x10a/0x190 [ 32.597987] kmem_cache_free+0x10d/0x4d0 [ 32.598491] rcu_core+0x8c8/0x2860 [ 32.598933] __do_softirq+0x1b7/0x7d4 [ 32.599430] [ 32.599646] Last potentially related work creation: [ 32.600230] kasan_save_stack+0x22/0x50 [ 32.600738] __kasan_record_aux_stack+0x8e/0xa0 [ 32.601314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.601950] remove_vma+0x139/0x170 [ 32.602407] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.602994] do_vmi_munmap+0x1f1/0x2b0 [ 32.603486] __vm_munmap+0x138/0x3a0 [ 32.603954] __x64_sys_munmap+0x59/0x80 [ 32.604449] do_syscall_64+0x3f/0x90 [ 32.604928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.605570] [ 32.605783] The buggy address belongs to the object at ffff888015baf000 [ 32.605783] which belongs to the cache vm_area_struct of size 168 [ 32.607262] The buggy address is located 88 bytes inside of [ 32.607262] freed 168-byte region [ffff888015baf000, ffff888015baf0a8) [ 32.608664] [ 32.608881] The buggy address belongs to the physical page: [ 32.609536] page:000000001b92622c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15baf [ 32.610620] memcg:ffff888018fba501 [ 32.611043] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.611697] page_type: 0xffffffff() [ 32.612148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.613054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fba501 [ 32.613965] page dumped because: kasan: bad access detected [ 32.614627] [ 32.614839] Memory state around the buggy address: [ 32.615432] ffff888015baef00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 32.616290] ffff888015baef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.617136] >ffff888015baf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.617981] ^ [ 32.618704] ffff888015baf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.619562] ffff888015baf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.620405] ================================================================== [ 32.621416] Disabling lock debugging due to kernel taint [ 35.472963] BUG: Bad rss-counter state mm:000000001199409c type:MM_FILEPAGES val:33 [ 35.474118] BUG: Bad rss-counter state mm:000000001199409c type:MM_ANONPAGES val:22 [ 35.906442] BUG: Bad rss-counter state mm:000000001a297145 type:MM_FILEPAGES val:33 [ 35.907800] BUG: Bad rss-counter state mm:000000001a297145 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8809' (ECDSA) to the list of known hosts. 2023/06/20 04:55:00 fuzzer started 2023/06/20 04:55:00 dialing manager at localhost:44161 2023/06/20 04:55:00 checking machine... 2023/06/20 04:55:00 checking revisions... [ 36.637434] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:55:00 testing simple program... [ 36.693749] cgroup: Unknown subsys name 'net' [ 36.747225] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813fc4c0 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813acee0 RDI=0000000000000001 RBP=ffffffff85407d68 RSP=ffff88806ce09df8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000078 R11=0000001753683a08 R12=0000000000000001 R13=ffff88806ce2c240 R14=ffffffff85407d68 R15=dffffc0000000000 RIP=ffffffff813acef2 RFL=00000046 [---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 0000000000000000 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=00007f7857813800 CR3=0000000016666000 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=2030303a35353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a34353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fcf36abbfff RBX=1ffff110028ede92 RCX=0000000000000000 RDX=1ffff110028edfd0 RSI=ffff88801476fe70 RDI=ffffffff84e399a0 RBP=ffffffff84e399a0 RSP=ffff88801476f438 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=ffff88800e166d98 R12=ffff88801476fe70 R13=0000000000000003 R14=ffff888009496600 R15=ffff88801476fe70 RIP=ffffffff814c07e0 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 00007fcf36ad0900 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=00007fcf36a9a008 CR3=000000001c9b2000 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=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