syzkaller login: [ 35.729269] BUG: Bad rss-counter state mm:00000000259ced49 type:MM_FILEPAGES val:33 [ 35.731254] BUG: Bad rss-counter state mm:00000000259ced49 type:MM_ANONPAGES val:22 [ 35.896352] ================================================================== [ 35.897278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.898239] Read of size 8 at addr ffff88800cc094e0 by task sshd/220 [ 35.899006] [ 35.899334] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.900207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.901197] Call Trace: [ 35.901521] [ 35.901813] dump_stack_lvl+0x91/0xf0 [ 35.902334] print_report+0xcc/0x620 [ 35.902825] ? __virt_addr_valid+0x102/0x340 [ 35.903386] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.904002] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.904625] kasan_report+0xbe/0xf0 [ 35.905105] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.905722] vma_interval_tree_remove+0xc75/0xec0 [ 35.906339] vma_prepare+0xc54/0x11a0 [ 35.906823] __split_vma+0x5af/0x950 [ 35.907303] ? __pfx___split_vma+0x10/0x10 [ 35.907836] ? find_held_lock+0x2c/0x110 [ 35.908360] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.908929] ? lock_is_held_type+0x9f/0x120 [ 35.909484] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.910095] ? mtree_range_walk+0x632/0x900 [ 35.910667] ? mas_walk+0x5c7/0x7c0 [ 35.911142] do_vmi_munmap+0x1f1/0x2b0 [ 35.911648] mmap_region+0x1f9/0x2660 [ 35.912132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.912649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.913371] ? __pfx_lock_acquire+0x10/0x10 [ 35.913909] ? __pfx_mmap_region+0x10/0x10 [ 35.914456] ? security_mmap_addr+0x7d/0xa0 [ 35.914989] ? get_unmapped_area+0x1f5/0x3f0 [ 35.915541] do_mmap+0x854/0xf00 [ 35.915987] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.916491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.917056] ksys_mmap_pgoff+0x3af/0x500 [ 35.917563] do_syscall_64+0x3f/0x90 [ 35.918047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.918716] RIP: 0033:0x7f4b23fd1d82 [ 35.919175] 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 [ 35.921314] RSP: 002b:00007ffdf709fc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.922262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b23fd1d82 [ 35.923134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b2340b000 [ 35.923984] RBP: 00007f4b2340b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.924832] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb5f148ec0 [ 35.925690] R13: 00007ffdf709fc40 R14: 00007ffdf709fc70 R15: 00007ffdf709ffd0 [ 35.926559] [ 35.926852] [ 35.927072] Allocated by task 213: [ 35.927499] kasan_save_stack+0x22/0x50 [ 35.928012] kasan_set_track+0x25/0x30 [ 35.928515] __kasan_slab_alloc+0x59/0x70 [ 35.929049] kmem_cache_alloc+0x16b/0x370 [ 35.929574] vm_area_dup+0x20/0x160 [ 35.930036] __split_vma+0x170/0x950 [ 35.930513] split_vma+0xc6/0x110 [ 35.930970] mprotect_fixup+0x8d2/0xb30 [ 35.931477] do_mprotect_pkey+0x87e/0xd40 [ 35.932009] __x64_sys_mprotect+0x78/0xc0 [ 35.932533] do_syscall_64+0x3f/0x90 [ 35.933010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.933654] [ 35.933872] Freed by task 220: [ 35.934283] kasan_save_stack+0x22/0x50 [ 35.934804] kasan_set_track+0x25/0x30 [ 35.935306] kasan_save_free_info+0x2b/0x50 [ 35.935841] __kasan_slab_free+0x10a/0x190 [ 35.936385] kmem_cache_free+0x10d/0x4d0 [ 35.936896] rcu_core+0x8c8/0x2860 [ 35.937341] __do_softirq+0x1b7/0x7d4 [ 35.937828] [ 35.938045] Last potentially related work creation: [ 35.938645] kasan_save_stack+0x22/0x50 [ 35.939147] __kasan_record_aux_stack+0x8e/0xa0 [ 35.939737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.940393] remove_vma+0x139/0x170 [ 35.940847] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.941408] do_vmi_munmap+0x1f1/0x2b0 [ 35.941895] __vm_munmap+0x138/0x3a0 [ 35.942380] __x64_sys_munmap+0x59/0x80 [ 35.942878] do_syscall_64+0x3f/0x90 [ 35.943361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.944015] [ 35.944228] The buggy address belongs to the object at ffff88800cc09488 [ 35.944228] which belongs to the cache vm_area_struct of size 168 [ 35.945703] The buggy address is located 88 bytes inside of [ 35.945703] freed 168-byte region [ffff88800cc09488, ffff88800cc09530) [ 35.947105] [ 35.947318] The buggy address belongs to the physical page: [ 35.948027] page:00000000cf82101c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc09 [ 35.949113] memcg:ffff88800e806801 [ 35.949543] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.950208] page_type: 0xffffffff() [ 35.950664] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.951608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e806801 [ 35.952547] page dumped because: kasan: bad access detected [ 35.953208] [ 35.953428] Memory state around the buggy address: [ 35.954026] ffff88800cc09380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.954899] ffff88800cc09400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.955775] >ffff88800cc09480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.956620] ^ [ 35.957372] ffff88800cc09500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.958241] ffff88800cc09580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.959094] ================================================================== [ 35.960119] Disabling lock debugging due to kernel taint [ 39.028862] BUG: Bad rss-counter state mm:00000000babd6f2c type:MM_FILEPAGES val:33 [ 39.030127] BUG: Bad rss-counter state mm:00000000babd6f2c type:MM_ANONPAGES val:22 [ 39.529623] BUG: Bad rss-counter state mm:00000000a1e616e4 type:MM_FILEPAGES val:33 [ 39.530718] BUG: Bad rss-counter state mm:00000000a1e616e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28380' (ECDSA) to the list of known hosts. 2023/06/20 23:52:12 fuzzer started 2023/06/20 23:52:12 dialing manager at localhost:36067 2023/06/20 23:52:12 checking machine... 2023/06/20 23:52:12 checking revisions... [ 40.269188] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:52:12 testing simple program... [ 40.324300] cgroup: Unknown subsys name 'net' [ 40.373498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:52:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000092cc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffffffff85265479 RBP=ffff88800f75fbb8 RSP=ffff88800f75fb68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff8184725c RIP=ffffffff8122e9e0 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 00007fae90c53900 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=00007ffe6eda3000 CR3=0000000016918000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f21e3fc4a00 CR3=000000000d876000 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=2031313a32353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000