syzkaller login: [ 32.848456] BUG: Bad rss-counter state mm:000000008c178054 type:MM_FILEPAGES val:33 [ 32.849648] BUG: Bad rss-counter state mm:000000008c178054 type:MM_ANONPAGES val:22 [ 32.890379] ================================================================== [ 32.891502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.892634] Read of size 8 at addr ffff888019136c20 by task sshd/220 [ 32.893514] [ 32.893794] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.894673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.895620] Call Trace: [ 32.895931] [ 32.896204] dump_stack_lvl+0x91/0xf0 [ 32.896678] print_report+0xcc/0x620 [ 32.897157] ? __virt_addr_valid+0x102/0x340 [ 32.897696] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.898297] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.898898] kasan_report+0xbe/0xf0 [ 32.899356] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.899951] vma_interval_tree_remove+0xc75/0xec0 [ 32.900530] vma_prepare+0xc54/0x11a0 [ 32.900988] __split_vma+0x5af/0x950 [ 32.901447] ? __pfx___split_vma+0x10/0x10 [ 32.901980] ? find_held_lock+0x2c/0x110 [ 32.902486] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.903036] ? lock_is_held_type+0x9f/0x120 [ 32.903552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.904137] ? mtree_range_walk+0x632/0x900 [ 32.904669] ? mas_walk+0x5c7/0x7c0 [ 32.905128] do_vmi_munmap+0x1f1/0x2b0 [ 32.905625] mmap_region+0x1f9/0x2660 [ 32.906096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.906592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.907276] ? __pfx_lock_acquire+0x10/0x10 [ 32.907789] ? __pfx_mmap_region+0x10/0x10 [ 32.908298] ? security_mmap_addr+0x7d/0xa0 [ 32.908809] ? get_unmapped_area+0x1f5/0x3f0 [ 32.909336] do_mmap+0x854/0xf00 [ 32.909779] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.910260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.910800] ksys_mmap_pgoff+0x3af/0x500 [ 32.911294] do_syscall_64+0x3f/0x90 [ 32.911754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.912378] RIP: 0033:0x7f7389fa0d82 [ 32.912816] 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 [ 32.914894] RSP: 002b:00007ffe0a345408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.915764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7389fa0d82 [ 32.916587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73893da000 [ 32.917406] RBP: 00007f73893da000 R08: 0000000000000009 R09: 0000000000001000 [ 32.918250] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ad7ccdec0 [ 32.919069] R13: 00007ffe0a345420 R14: 00007ffe0a345450 R15: 00007ffe0a3457b0 [ 32.919900] [ 32.920182] [ 32.920393] Allocated by task 213: [ 32.920808] kasan_save_stack+0x22/0x50 [ 32.921301] kasan_set_track+0x25/0x30 [ 32.921788] __kasan_slab_alloc+0x59/0x70 [ 32.922297] kmem_cache_alloc+0x16b/0x370 [ 32.922794] vm_area_dup+0x20/0x160 [ 32.923235] __split_vma+0x170/0x950 [ 32.923693] split_vma+0xc6/0x110 [ 32.924127] mprotect_fixup+0x8d2/0xb30 [ 32.924615] do_mprotect_pkey+0x87e/0xd40 [ 32.925119] __x64_sys_mprotect+0x78/0xc0 [ 32.925641] do_syscall_64+0x3f/0x90 [ 32.926102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.926725] [ 32.926933] Freed by task 213: [ 32.927316] kasan_save_stack+0x22/0x50 [ 32.927803] kasan_set_track+0x25/0x30 [ 32.928285] kasan_save_free_info+0x2b/0x50 [ 32.928802] __kasan_slab_free+0x10a/0x190 [ 32.929314] kmem_cache_free+0x10d/0x4d0 [ 32.929812] rcu_core+0x8c8/0x2860 [ 32.930243] __do_softirq+0x1b7/0x7d4 [ 32.930703] [ 32.930913] Last potentially related work creation: [ 32.931479] kasan_save_stack+0x22/0x50 [ 32.931967] __kasan_record_aux_stack+0x8e/0xa0 [ 32.932525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.933146] remove_vma+0x139/0x170 [ 32.933671] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.934223] do_vmi_munmap+0x1f1/0x2b0 [ 32.934696] __vm_munmap+0x138/0x3a0 [ 32.935150] __x64_sys_munmap+0x59/0x80 [ 32.935641] do_syscall_64+0x3f/0x90 [ 32.936104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.936722] [ 32.936935] The buggy address belongs to the object at ffff888019136bc8 [ 32.936935] which belongs to the cache vm_area_struct of size 168 [ 32.938355] The buggy address is located 88 bytes inside of [ 32.938355] freed 168-byte region [ffff888019136bc8, ffff888019136c70) [ 32.939706] [ 32.939915] The buggy address belongs to the physical page: [ 32.940550] page:0000000009c38432 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19136 [ 32.941615] memcg:ffff88800fc20f01 [ 32.942029] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.942704] page_type: 0xffffffff() [ 32.943137] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.944019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc20f01 [ 32.944895] page dumped because: kasan: bad access detected [ 32.945534] [ 32.945763] Memory state around the buggy address: [ 32.946320] ffff888019136b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.947147] ffff888019136b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.947977] >ffff888019136c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.948797] ^ [ 32.949313] ffff888019136c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.950146] ffff888019136d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.950963] ================================================================== [ 32.951847] Disabling lock debugging due to kernel taint [ 35.201544] BUG: Bad rss-counter state mm:000000008cf28f96 type:MM_FILEPAGES val:33 [ 35.202986] BUG: Bad rss-counter state mm:000000008cf28f96 type:MM_ANONPAGES val:22 [ 35.667084] BUG: Bad rss-counter state mm:0000000068877fa8 type:MM_FILEPAGES val:33 [ 35.668264] BUG: Bad rss-counter state mm:0000000068877fa8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7291' (ECDSA) to the list of known hosts. 2023/06/20 02:23:55 fuzzer started 2023/06/20 02:23:55 dialing manager at localhost:44161 2023/06/20 02:23:55 checking machine... 2023/06/20 02:23:55 checking revisions... [ 36.413332] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:23:55 testing simple program... [ 36.467235] cgroup: Unknown subsys name 'net' [ 36.505466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:53 Registers: info registers vcpu 0 RAX=ffff888014610001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014610001 RSI=ffff88801460ff58 RDI=ffff88801460ffd8 RBP=ffff88801460f750 RSP=ffff88801460f680 R8 =ffffffff864b9d5a R9 =ffff88801460f738 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801460f758 R13=ffff88801460f740 R14=ffff88801460ff58 R15=ffff88801460f6f8 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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 00007fdddcbac900 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=00007ffdf6dba000 CR3=000000000fe44000 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=6720646572637465733a4d41503d706f 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6d88513000 CR3=00000000191d4000 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=2034353a33323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a33323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000