syzkaller login: [ 31.595780] BUG: Bad rss-counter state mm:0000000000fefdbe type:MM_FILEPAGES val:33 [ 31.597228] BUG: Bad rss-counter state mm:0000000000fefdbe type:MM_ANONPAGES val:22 [ 31.769677] ================================================================== [ 31.770880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.772261] Read of size 8 at addr ffff888019c33310 by task sshd/222 [ 31.773332] [ 31.773602] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.774511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.775513] Call Trace: [ 31.775852] [ 31.776149] dump_stack_lvl+0x91/0xf0 [ 31.776656] print_report+0xcc/0x620 [ 31.777143] ? __virt_addr_valid+0x102/0x340 [ 31.777744] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.779019] kasan_report+0xbe/0xf0 [ 31.779513] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780154] vma_interval_tree_remove+0xc75/0xec0 [ 31.780781] vma_prepare+0xc54/0x11a0 [ 31.781301] __split_vma+0x5af/0x950 [ 31.781802] ? __pfx___split_vma+0x10/0x10 [ 31.782352] ? find_held_lock+0x2c/0x110 [ 31.782891] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.783477] ? lock_is_held_type+0x9f/0x120 [ 31.784035] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.784662] ? mtree_range_walk+0x632/0x900 [ 31.785226] ? mas_walk+0x5c7/0x7c0 [ 31.785758] do_vmi_munmap+0x1f1/0x2b0 [ 31.786264] mmap_region+0x1f9/0x2660 [ 31.786755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.787282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.788009] ? __pfx_lock_acquire+0x10/0x10 [ 31.788551] ? __pfx_mmap_region+0x10/0x10 [ 31.789089] ? security_mmap_addr+0x7d/0xa0 [ 31.789662] ? get_unmapped_area+0x1f5/0x3f0 [ 31.790224] do_mmap+0x854/0xf00 [ 31.790677] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.791181] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.791766] ksys_mmap_pgoff+0x3af/0x500 [ 31.792288] do_syscall_64+0x3f/0x90 [ 31.792777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793470] RIP: 0033:0x7f49b4c18d82 [ 31.793934] 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 [ 31.796074] RSP: 002b:00007ffebf295f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.797003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49b4c18d82 [ 31.797891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49b4052000 [ 31.798747] RBP: 00007f49b4052000 R08: 0000000000000009 R09: 0000000000001000 [ 31.799600] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560478c4cec0 [ 31.800456] R13: 00007ffebf295fb0 R14: 00007ffebf295fe0 R15: 00007ffebf296340 [ 31.801342] [ 31.801644] [ 31.801864] Allocated by task 214: [ 31.802305] kasan_save_stack+0x22/0x50 [ 31.802812] kasan_set_track+0x25/0x30 [ 31.803312] __kasan_slab_alloc+0x59/0x70 [ 31.803841] kmem_cache_alloc+0x16b/0x370 [ 31.804368] vm_area_dup+0x20/0x160 [ 31.804825] __split_vma+0x170/0x950 [ 31.805326] split_vma+0xc6/0x110 [ 31.805775] mprotect_fixup+0x8d2/0xb30 [ 31.806276] do_mprotect_pkey+0x87e/0xd40 [ 31.806799] __x64_sys_mprotect+0x78/0xc0 [ 31.807322] do_syscall_64+0x3f/0x90 [ 31.807802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.808444] [ 31.808663] Freed by task 214: [ 31.809065] kasan_save_stack+0x22/0x50 [ 31.809619] kasan_set_track+0x25/0x30 [ 31.810121] kasan_save_free_info+0x2b/0x50 [ 31.810654] __kasan_slab_free+0x10a/0x190 [ 31.811191] kmem_cache_free+0x10d/0x4d0 [ 31.811706] rcu_core+0x8c8/0x2860 [ 31.812162] __do_softirq+0x1b7/0x7d4 [ 31.812639] [ 31.812855] Last potentially related work creation: [ 31.813469] kasan_save_stack+0x22/0x50 [ 31.813980] __kasan_record_aux_stack+0x8e/0xa0 [ 31.814554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.815294] remove_vma+0x139/0x170 [ 31.815818] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.816467] do_vmi_munmap+0x1f1/0x2b0 [ 31.817031] __vm_munmap+0x138/0x3a0 [ 31.817612] __x64_sys_munmap+0x59/0x80 [ 31.818195] do_syscall_64+0x3f/0x90 [ 31.818746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.819490] [ 31.819738] The buggy address belongs to the object at ffff888019c332b8 [ 31.819738] which belongs to the cache vm_area_struct of size 168 [ 31.821491] The buggy address is located 88 bytes inside of [ 31.821491] freed 168-byte region [ffff888019c332b8, ffff888019c33360) [ 31.823123] [ 31.823373] The buggy address belongs to the physical page: [ 31.824140] page:000000000989edf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c33 [ 31.825434] memcg:ffff88800ca4da01 [ 31.825926] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.826673] page_type: 0xffffffff() [ 31.827191] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.828250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca4da01 [ 31.829338] page dumped because: kasan: bad access detected [ 31.830099] [ 31.830346] Memory state around the buggy address: [ 31.831020] ffff888019c33200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.832009] ffff888019c33280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.832996] >ffff888019c33300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.834008] ^ [ 31.834548] ffff888019c33380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.835543] ffff888019c33400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.836515] ================================================================== [ 31.837832] Disabling lock debugging due to kernel taint [ 33.918914] BUG: Bad rss-counter state mm:00000000be7936a6 type:MM_FILEPAGES val:33 [ 33.919633] BUG: Bad rss-counter state mm:00000000be7936a6 type:MM_ANONPAGES val:22 [ 34.435404] BUG: Bad rss-counter state mm:000000006e5931a2 type:MM_FILEPAGES val:33 [ 34.436565] BUG: Bad rss-counter state mm:000000006e5931a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36813' (ECDSA) to the list of known hosts. 2023/06/19 13:29:31 fuzzer started 2023/06/19 13:29:32 dialing manager at localhost:44161 2023/06/19 13:29:32 checking machine... 2023/06/19 13:29:32 checking revisions... [ 35.157489] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:29:32 testing simple program... [ 35.207488] cgroup: Unknown subsys name 'net' [ 35.266897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:29:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0fc99d8d70 CR3=000000000d5b4000 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=f4c21421ff3c3da750478622c5885720 XMM02=ec2efd57dc4c00df0000000000120040 XMM03=435bedfe4edd236d0000000000120110 XMM04=93ef710f9195172d00000000000ae988 XMM05=59d5b690e0af863b00000000001343d8 XMM06=d9605b3960e488bd0000000000133240 XMM07=e042d86d42eb936e0000000000124ad0 XMM08=435bedfe4edd236d0000000000120110 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86137dd7 RBX=0000000000000001 RCX=ffffffff86137dd2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f5a7a30 RSP=ffff88800f5a7968 R8 =ffffffff86137dd6 R9 =ffff88800f5a7a18 R10=0000000000038001 R11=0000000000020f00 R12=ffff88800f5a7a38 R13=ffff88800f5a7a20 R14=ffff88800f5a7d48 R15=ffff88800f5a79d8 RIP=ffffffff8113113c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3a5546f900 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=00007f3a55a23ae8 CR3=000000000eae6000 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