syzkaller login: [ 31.092491] BUG: Bad rss-counter state mm:00000000ea8eff5b type:MM_FILEPAGES val:33 [ 31.093565] BUG: Bad rss-counter state mm:00000000ea8eff5b type:MM_ANONPAGES val:22 [ 31.250423] ================================================================== [ 31.251342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.252299] Read of size 8 at addr ffff88800e020228 by task sshd/221 [ 31.253072] [ 31.253304] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.254316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.255301] Call Trace: [ 31.255649] [ 31.255936] dump_stack_lvl+0x91/0xf0 [ 31.256439] print_report+0xcc/0x620 [ 31.256943] ? __virt_addr_valid+0x102/0x340 [ 31.257506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258130] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258755] kasan_report+0xbe/0xf0 [ 31.259229] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259872] vma_interval_tree_remove+0xc75/0xec0 [ 31.260483] vma_prepare+0xc54/0x11a0 [ 31.260957] __split_vma+0x5af/0x950 [ 31.261433] ? __pfx___split_vma+0x10/0x10 [ 31.261962] ? find_held_lock+0x2c/0x110 [ 31.262490] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.263047] ? lock_is_held_type+0x9f/0x120 [ 31.263588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264187] ? mtree_range_walk+0x632/0x900 [ 31.264748] ? mas_walk+0x5c7/0x7c0 [ 31.265220] do_vmi_munmap+0x1f1/0x2b0 [ 31.265717] mmap_region+0x1f9/0x2660 [ 31.266203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266715] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267476] ? __pfx_lock_acquire+0x10/0x10 [ 31.268019] ? __pfx_mmap_region+0x10/0x10 [ 31.268561] ? security_mmap_addr+0x7d/0xa0 [ 31.269094] ? get_unmapped_area+0x1f5/0x3f0 [ 31.269645] do_mmap+0x854/0xf00 [ 31.270086] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271153] ksys_mmap_pgoff+0x3af/0x500 [ 31.271677] do_syscall_64+0x3f/0x90 [ 31.272176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272833] RIP: 0033:0x7f87f99b9d82 [ 31.273294] 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 [ 31.275468] RSP: 002b:00007ffeb4b13888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87f99b9d82 [ 31.277242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87f8df3000 [ 31.278092] RBP: 00007f87f8df3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278939] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ac1e6cb20 [ 31.279810] R13: 00007ffeb4b138a0 R14: 00007ffeb4b138d0 R15: 00007ffeb4b13c30 [ 31.280656] [ 31.280952] [ 31.281170] Allocated by task 214: [ 31.281598] kasan_save_stack+0x22/0x50 [ 31.282099] kasan_set_track+0x25/0x30 [ 31.282594] __kasan_slab_alloc+0x59/0x70 [ 31.283122] kmem_cache_alloc+0x16b/0x370 [ 31.283663] vm_area_dup+0x20/0x160 [ 31.284121] __split_vma+0x170/0x950 [ 31.284596] split_vma+0xc6/0x110 [ 31.285037] mprotect_fixup+0x8d2/0xb30 [ 31.285543] do_mprotect_pkey+0x87e/0xd40 [ 31.286068] __x64_sys_mprotect+0x78/0xc0 [ 31.286595] do_syscall_64+0x3f/0x90 [ 31.287068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287722] [ 31.287938] Freed by task 200: [ 31.288324] kasan_save_stack+0x22/0x50 [ 31.288831] kasan_set_track+0x25/0x30 [ 31.289335] kasan_save_free_info+0x2b/0x50 [ 31.289871] __kasan_slab_free+0x10a/0x190 [ 31.290413] kmem_cache_free+0x10d/0x4d0 [ 31.290916] rcu_core+0x8c8/0x2860 [ 31.291360] __do_softirq+0x1b7/0x7d4 [ 31.291861] [ 31.292078] Last potentially related work creation: [ 31.292690] kasan_save_stack+0x22/0x50 [ 31.293195] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294408] remove_vma+0x139/0x170 [ 31.294861] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295435] do_vmi_munmap+0x1f1/0x2b0 [ 31.295919] __vm_munmap+0x138/0x3a0 [ 31.296393] __x64_sys_munmap+0x59/0x80 [ 31.296901] do_syscall_64+0x3f/0x90 [ 31.297379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298023] [ 31.298244] Second to last potentially related work creation: [ 31.298937] kasan_save_stack+0x22/0x50 [ 31.299449] __kasan_record_aux_stack+0x8e/0xa0 [ 31.300018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300653] remove_vma+0x139/0x170 [ 31.301105] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301657] do_vmi_munmap+0x1f1/0x2b0 [ 31.302139] mmap_region+0x1f9/0x2660 [ 31.302621] do_mmap+0x854/0xf00 [ 31.303051] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303555] ksys_mmap_pgoff+0x3af/0x500 [ 31.304057] do_syscall_64+0x3f/0x90 [ 31.304542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305191] [ 31.305409] The buggy address belongs to the object at ffff88800e0201d0 [ 31.305409] which belongs to the cache vm_area_struct of size 168 [ 31.306878] The buggy address is located 88 bytes inside of [ 31.306878] freed 168-byte region [ffff88800e0201d0, ffff88800e020278) [ 31.308278] [ 31.308499] The buggy address belongs to the physical page: [ 31.309153] page:000000008e9e938c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe020 [ 31.310224] memcg:ffff88800c671f01 [ 31.310649] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.311291] page_type: 0xffffffff() [ 31.311769] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374440 dead000000000006 [ 31.312693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c671f01 [ 31.313598] page dumped because: kasan: bad access detected [ 31.314255] [ 31.314469] Memory state around the buggy address: [ 31.315052] ffff88800e020100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.315914] ffff88800e020180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.316764] >ffff88800e020200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.317612] ^ [ 31.318168] ffff88800e020280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.319033] ffff88800e020300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.319897] ================================================================== [ 31.321061] Disabling lock debugging due to kernel taint [ 33.968118] BUG: Bad rss-counter state mm:000000003dae09c3 type:MM_FILEPAGES val:33 [ 33.969136] BUG: Bad rss-counter state mm:000000003dae09c3 type:MM_ANONPAGES val:22 [ 34.377514] BUG: Bad rss-counter state mm:000000008d832d6e type:MM_FILEPAGES val:33 [ 34.378643] BUG: Bad rss-counter state mm:000000008d832d6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2871' (ECDSA) to the list of known hosts. 2023/06/21 08:14:42 fuzzer started 2023/06/21 08:14:43 dialing manager at localhost:36067 2023/06/21 08:14:43 checking machine... 2023/06/21 08:14:43 checking revisions... [ 34.997073] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:14:43 testing simple program... [ 35.044668] cgroup: Unknown subsys name 'net' [ 35.089223] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:42 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=00007f5faf2d26b0 CR3=000000000e5c6000 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=2032343a34313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a34313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8173f86f RDX=00000000000073f8 RSI=00000000000073f8 RDI=ffffffff865069d0 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000001e427 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff811307c2 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 00007f41aa25a900 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=00007f41aa229008 CR3=000000000f07e000 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