syzkaller login: [ 30.897622] BUG: Bad rss-counter state mm:00000000915aa356 type:MM_FILEPAGES val:33 [ 30.898920] BUG: Bad rss-counter state mm:00000000915aa356 type:MM_ANONPAGES val:22 [ 31.061175] ================================================================== [ 31.062200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063232] Read of size 8 at addr ffff88800edabed8 by task sshd/220 [ 31.064183] [ 31.064424] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.065337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.066392] Call Trace: [ 31.066713] [ 31.067003] dump_stack_lvl+0x91/0xf0 [ 31.067496] print_report+0xcc/0x620 [ 31.067980] ? __virt_addr_valid+0x102/0x340 [ 31.068538] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069782] kasan_report+0xbe/0xf0 [ 31.070296] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070939] vma_interval_tree_remove+0xc75/0xec0 [ 31.071554] vma_prepare+0xc54/0x11a0 [ 31.072039] __split_vma+0x5af/0x950 [ 31.072523] ? __pfx___split_vma+0x10/0x10 [ 31.073047] ? find_held_lock+0x2c/0x110 [ 31.073584] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.074203] ? lock_is_held_type+0x9f/0x120 [ 31.074749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.075371] ? mtree_range_walk+0x632/0x900 [ 31.075940] ? mas_walk+0x5c7/0x7c0 [ 31.076432] do_vmi_munmap+0x1f1/0x2b0 [ 31.076929] mmap_region+0x1f9/0x2660 [ 31.077425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.077972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.078689] ? __pfx_lock_acquire+0x10/0x10 [ 31.079225] ? __pfx_mmap_region+0x10/0x10 [ 31.079763] ? security_mmap_addr+0x7d/0xa0 [ 31.080305] ? get_unmapped_area+0x1f5/0x3f0 [ 31.080859] do_mmap+0x854/0xf00 [ 31.081305] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082408] ksys_mmap_pgoff+0x3af/0x500 [ 31.082923] do_syscall_64+0x3f/0x90 [ 31.083412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084069] RIP: 0033:0x7f934c640d82 [ 31.084527] 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 [ 31.086705] RSP: 002b:00007ffd9b18dac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.087628] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f934c640d82 [ 31.088484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f934ba7a000 [ 31.089338] RBP: 00007f934ba7a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.090220] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564848466ec0 [ 31.091066] R13: 00007ffd9b18dae0 R14: 00007ffd9b18db10 R15: 00007ffd9b18de70 [ 31.091929] [ 31.092220] [ 31.092438] Allocated by task 213: [ 31.092869] kasan_save_stack+0x22/0x50 [ 31.093381] kasan_set_track+0x25/0x30 [ 31.093907] __kasan_slab_alloc+0x59/0x70 [ 31.094459] kmem_cache_alloc+0x16b/0x370 [ 31.095005] vm_area_dup+0x20/0x160 [ 31.095491] __split_vma+0x170/0x950 [ 31.095989] split_vma+0xc6/0x110 [ 31.096502] mprotect_fixup+0x8d2/0xb30 [ 31.097081] do_mprotect_pkey+0x87e/0xd40 [ 31.097628] __x64_sys_mprotect+0x78/0xc0 [ 31.098198] do_syscall_64+0x3f/0x90 [ 31.098696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099368] [ 31.099590] Freed by task 213: [ 31.100007] kasan_save_stack+0x22/0x50 [ 31.100542] kasan_set_track+0x25/0x30 [ 31.101053] kasan_save_free_info+0x2b/0x50 [ 31.101606] __kasan_slab_free+0x10a/0x190 [ 31.102189] kmem_cache_free+0x10d/0x4d0 [ 31.102726] rcu_core+0x8c8/0x2860 [ 31.103189] __do_softirq+0x1b7/0x7d4 [ 31.103690] [ 31.103913] Last potentially related work creation: [ 31.104529] kasan_save_stack+0x22/0x50 [ 31.105058] __kasan_record_aux_stack+0x8e/0xa0 [ 31.105667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.106388] remove_vma+0x139/0x170 [ 31.106863] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.107445] do_vmi_munmap+0x1f1/0x2b0 [ 31.107962] __vm_munmap+0x138/0x3a0 [ 31.108452] __x64_sys_munmap+0x59/0x80 [ 31.108975] do_syscall_64+0x3f/0x90 [ 31.109474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.110166] [ 31.110393] Second to last potentially related work creation: [ 31.111120] kasan_save_stack+0x22/0x50 [ 31.111659] __kasan_record_aux_stack+0x8e/0xa0 [ 31.112261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.112931] remove_vma+0x139/0x170 [ 31.113398] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.114023] do_vmi_munmap+0x1f1/0x2b0 [ 31.114548] mmap_region+0x1f9/0x2660 [ 31.115058] do_mmap+0x854/0xf00 [ 31.115524] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.116050] ksys_mmap_pgoff+0x3af/0x500 [ 31.116588] do_syscall_64+0x3f/0x90 [ 31.117097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.117786] [ 31.118048] The buggy address belongs to the object at ffff88800edabe80 [ 31.118048] which belongs to the cache vm_area_struct of size 168 [ 31.119634] The buggy address is located 88 bytes inside of [ 31.119634] freed 168-byte region [ffff88800edabe80, ffff88800edabf28) [ 31.121145] [ 31.121372] The buggy address belongs to the physical page: [ 31.122108] page:000000000fb16a8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedab [ 31.123283] memcg:ffff88800dd57301 [ 31.123741] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.124495] page_type: 0xffffffff() [ 31.124986] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a64c0 dead00000000000b [ 31.126000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd57301 [ 31.126976] page dumped because: kasan: bad access detected [ 31.127687] [ 31.127918] Memory state around the buggy address: [ 31.128554] ffff88800edabd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.129477] ffff88800edabe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.130432] >ffff88800edabe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.131345] ^ [ 31.132127] ffff88800edabf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.133048] ffff88800edabf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.133984] ================================================================== [ 31.135100] Disabling lock debugging due to kernel taint [ 33.719918] BUG: Bad rss-counter state mm:000000006c38d7ff type:MM_FILEPAGES val:33 [ 33.720940] BUG: Bad rss-counter state mm:000000006c38d7ff type:MM_ANONPAGES val:22 [ 34.104342] BUG: Bad rss-counter state mm:00000000f7255d10 type:MM_FILEPAGES val:33 [ 34.105855] BUG: Bad rss-counter state mm:00000000f7255d10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47832' (ECDSA) to the list of known hosts. 2023/06/20 13:57:22 fuzzer started 2023/06/20 13:57:22 dialing manager at localhost:36067 2023/06/20 13:57:22 checking machine... 2023/06/20 13:57:22 checking revisions... [ 34.898225] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:57:22 testing simple program... [ 34.942362] cgroup: Unknown subsys name 'net' [ 34.988991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:57:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ff5c05db000 CR3=000000000e4d8000 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=2031323a37353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a37353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864aad72 RDX=0000000000000008 RSI=ffff88800fc8fae0 RDI=ffff88800fc8f6b0 RBP=ffff88800fc8f708 RSP=ffff88800fc8f638 R8 =0000000000000001 R9 =ffff88800fc8f6f0 R10=0000000000038001 R11=00000000000b3d67 R12=ffff88800fc8f710 R13=ffff88800fc8f6f8 R14=ffff88800fc8fae0 R15=ffff88800fc8f6b0 RIP=ffffffff811303fa RFL=00000283 [--S---C] 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 00007f1923b92900 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=00007f1923b71020 CR3=000000000970c000 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