syzkaller login: [ 31.430485] BUG: Bad rss-counter state mm:00000000504d208b type:MM_FILEPAGES val:33 [ 31.431611] BUG: Bad rss-counter state mm:00000000504d208b type:MM_ANONPAGES val:22 [ 31.613152] ================================================================== [ 31.614165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.615270] Read of size 8 at addr ffff88800fd72310 by task sshd/220 [ 31.616089] [ 31.616320] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.617262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.618287] Call Trace: [ 31.618622] [ 31.618920] dump_stack_lvl+0x91/0xf0 [ 31.619442] print_report+0xcc/0x620 [ 31.619952] ? __virt_addr_valid+0x102/0x340 [ 31.620539] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.621215] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.621857] kasan_report+0xbe/0xf0 [ 31.622351] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.623000] vma_interval_tree_remove+0xc75/0xec0 [ 31.623634] vma_prepare+0xc54/0x11a0 [ 31.624136] __split_vma+0x5af/0x950 [ 31.624631] ? __pfx___split_vma+0x10/0x10 [ 31.625190] ? find_held_lock+0x2c/0x110 [ 31.625735] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.626323] ? lock_is_held_type+0x9f/0x120 [ 31.626888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.627519] ? mtree_range_walk+0x632/0x900 [ 31.628098] ? mas_walk+0x5c7/0x7c0 [ 31.628596] do_vmi_munmap+0x1f1/0x2b0 [ 31.629116] mmap_region+0x1f9/0x2660 [ 31.629618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.630154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.630902] ? __pfx_lock_acquire+0x10/0x10 [ 31.631459] ? __pfx_mmap_region+0x10/0x10 [ 31.632038] ? security_mmap_addr+0x7d/0xa0 [ 31.632603] ? get_unmapped_area+0x1f5/0x3f0 [ 31.633250] do_mmap+0x854/0xf00 [ 31.633721] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.634258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.634860] ksys_mmap_pgoff+0x3af/0x500 [ 31.635415] do_syscall_64+0x3f/0x90 [ 31.635942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636667] RIP: 0033:0x7f640bd3bd82 [ 31.637181] 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 [ 31.639559] RSP: 002b:00007ffe5cd06b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.640573] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f640bd3bd82 [ 31.641532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f640b175000 [ 31.642467] RBP: 00007f640b175000 R08: 0000000000000009 R09: 0000000000001000 [ 31.643393] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642af136d90 [ 31.644325] R13: 00007ffe5cd06b50 R14: 00007ffe5cd06b80 R15: 00007ffe5cd06ee0 [ 31.645280] [ 31.645600] [ 31.645836] Allocated by task 213: [ 31.646303] kasan_save_stack+0x22/0x50 [ 31.646861] kasan_set_track+0x25/0x30 [ 31.647400] __kasan_slab_alloc+0x59/0x70 [ 31.647975] kmem_cache_alloc+0x16b/0x370 [ 31.648535] vm_area_dup+0x20/0x160 [ 31.649042] __split_vma+0x170/0x950 [ 31.649549] split_vma+0xc6/0x110 [ 31.650028] mprotect_fixup+0x8d2/0xb30 [ 31.650584] do_mprotect_pkey+0x87e/0xd40 [ 31.651154] __x64_sys_mprotect+0x78/0xc0 [ 31.651739] do_syscall_64+0x3f/0x90 [ 31.652261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.652986] [ 31.653218] Freed by task 213: [ 31.653649] kasan_save_stack+0x22/0x50 [ 31.654200] kasan_set_track+0x25/0x30 [ 31.654734] kasan_save_free_info+0x2b/0x50 [ 31.655323] __kasan_slab_free+0x10a/0x190 [ 31.655902] kmem_cache_free+0x10d/0x4d0 [ 31.656449] rcu_core+0x8c8/0x2860 [ 31.656938] __do_softirq+0x1b7/0x7d4 [ 31.657459] [ 31.657690] Last potentially related work creation: [ 31.658329] kasan_save_stack+0x22/0x50 [ 31.658875] __kasan_record_aux_stack+0x8e/0xa0 [ 31.659501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.660207] remove_vma+0x139/0x170 [ 31.660706] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.661340] do_vmi_munmap+0x1f1/0x2b0 [ 31.661869] __vm_munmap+0x138/0x3a0 [ 31.662376] __x64_sys_munmap+0x59/0x80 [ 31.662916] do_syscall_64+0x3f/0x90 [ 31.663430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.664132] [ 31.664368] The buggy address belongs to the object at ffff88800fd722b8 [ 31.664368] which belongs to the cache vm_area_struct of size 168 [ 31.665991] The buggy address is located 88 bytes inside of [ 31.665991] freed 168-byte region [ffff88800fd722b8, ffff88800fd72360) [ 31.667515] [ 31.667748] The buggy address belongs to the physical page: [ 31.668466] page:0000000074f2e56a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd72 [ 31.669680] memcg:ffff88800cad7801 [ 31.670149] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.670860] page_type: 0xffffffff() [ 31.671357] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.672344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cad7801 [ 31.673351] page dumped because: kasan: bad access detected [ 31.674069] [ 31.674304] Memory state around the buggy address: [ 31.674950] ffff88800fd72200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.675874] ffff88800fd72280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.676807] >ffff88800fd72300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.677757] ^ [ 31.678277] ffff88800fd72380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.679220] ffff88800fd72400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.680151] ================================================================== [ 31.681387] Disabling lock debugging due to kernel taint [ 33.459546] BUG: Bad rss-counter state mm:0000000081aa7fa7 type:MM_FILEPAGES val:33 [ 33.460318] BUG: Bad rss-counter state mm:0000000081aa7fa7 type:MM_ANONPAGES val:22 [ 33.811092] BUG: Bad rss-counter state mm:000000005d1ffef1 type:MM_FILEPAGES val:33 [ 33.811632] BUG: Bad rss-counter state mm:000000005d1ffef1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53438' (ECDSA) to the list of known hosts. 2023/06/20 13:00:55 fuzzer started 2023/06/20 13:00:55 dialing manager at localhost:36067 2023/06/20 13:00:55 checking machine... 2023/06/20 13:00:55 checking revisions... [ 34.317689] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:55 testing simple program... [ 34.352903] cgroup: Unknown subsys name 'net' [ 34.399631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001fd0c11 RSI=ffffffff8173223d RDI=ffff88800fe86088 RBP=ffff88800fe86000 RSP=ffff88801a0cfbe8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=ffff8880167e2e40 R15=0000000000000002 RIP=ffffffff81732266 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 00007feaaa210900 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=00007feaaa1ef020 CR3=000000000eb80000 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=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=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=00007fe7f54c93c0 CR3=000000000cb04000 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=2035353a30303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000