syzkaller login: [ 30.352685] BUG: Bad rss-counter state mm:0000000009d800c8 type:MM_FILEPAGES val:33 [ 30.354184] BUG: Bad rss-counter state mm:0000000009d800c8 type:MM_ANONPAGES val:22 [ 30.530013] ================================================================== [ 30.531049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.532226] Read of size 8 at addr ffff88800c44cc20 by task sshd/219 [ 30.533104] [ 30.533355] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.534354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.535455] Call Trace: [ 30.535814] [ 30.536140] dump_stack_lvl+0x91/0xf0 [ 30.536697] print_report+0xcc/0x620 [ 30.537247] ? __virt_addr_valid+0x102/0x340 [ 30.537882] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.538585] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539301] kasan_report+0xbe/0xf0 [ 30.539865] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540610] vma_interval_tree_remove+0xc75/0xec0 [ 30.541323] vma_prepare+0xc54/0x11a0 [ 30.541908] __split_vma+0x5af/0x950 [ 30.542467] ? __pfx___split_vma+0x10/0x10 [ 30.543093] ? find_held_lock+0x2c/0x110 [ 30.543708] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.544373] ? lock_is_held_type+0x9f/0x120 [ 30.545009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.545760] ? mtree_range_walk+0x632/0x900 [ 30.546429] ? mas_walk+0x5c7/0x7c0 [ 30.546992] do_vmi_munmap+0x1f1/0x2b0 [ 30.547575] mmap_region+0x1f9/0x2660 [ 30.548157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.548763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.549613] ? __pfx_lock_acquire+0x10/0x10 [ 30.550274] ? __pfx_mmap_region+0x10/0x10 [ 30.550905] ? security_mmap_addr+0x7d/0xa0 [ 30.551542] ? get_unmapped_area+0x1f5/0x3f0 [ 30.552203] do_mmap+0x854/0xf00 [ 30.552730] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.553319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.553996] ksys_mmap_pgoff+0x3af/0x500 [ 30.554603] do_syscall_64+0x3f/0x90 [ 30.555168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.555936] RIP: 0033:0x7f2bc19d9d82 [ 30.556474] 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 [ 30.559004] RSP: 002b:00007ffd32d3e138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.560079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bc19d9d82 [ 30.561067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bc0e13000 [ 30.562075] RBP: 00007f2bc0e13000 R08: 0000000000000009 R09: 0000000000001000 [ 30.563094] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d0a813b20 [ 30.564100] R13: 00007ffd32d3e150 R14: 00007ffd32d3e180 R15: 00007ffd32d3e4e0 [ 30.565108] [ 30.565456] [ 30.565706] Allocated by task 212: [ 30.566251] kasan_save_stack+0x22/0x50 [ 30.566851] kasan_set_track+0x25/0x30 [ 30.567431] __kasan_slab_alloc+0x59/0x70 [ 30.568051] kmem_cache_alloc+0x16b/0x370 [ 30.568666] vm_area_dup+0x20/0x160 [ 30.569197] __split_vma+0x170/0x950 [ 30.569766] split_vma+0xc6/0x110 [ 30.570295] mprotect_fixup+0x8d2/0xb30 [ 30.570888] do_mprotect_pkey+0x87e/0xd40 [ 30.571502] __x64_sys_mprotect+0x78/0xc0 [ 30.572120] do_syscall_64+0x3f/0x90 [ 30.572679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.573443] [ 30.573699] Freed by task 212: [ 30.574177] kasan_save_stack+0x22/0x50 [ 30.574771] kasan_set_track+0x25/0x30 [ 30.575361] kasan_save_free_info+0x2b/0x50 [ 30.575993] __kasan_slab_free+0x10a/0x190 [ 30.576626] kmem_cache_free+0x10d/0x4d0 [ 30.577230] rcu_core+0x8c8/0x2860 [ 30.577774] __do_softirq+0x1b7/0x7d4 [ 30.578346] [ 30.578602] Last potentially related work creation: [ 30.579297] kasan_save_stack+0x22/0x50 [ 30.579884] __kasan_record_aux_stack+0x8e/0xa0 [ 30.580554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.581307] remove_vma+0x139/0x170 [ 30.581843] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.582489] do_vmi_munmap+0x1f1/0x2b0 [ 30.583054] __vm_munmap+0x138/0x3a0 [ 30.583592] __x64_sys_munmap+0x59/0x80 [ 30.584173] do_syscall_64+0x3f/0x90 [ 30.584721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585472] [ 30.585724] The buggy address belongs to the object at ffff88800c44cbc8 [ 30.585724] which belongs to the cache vm_area_struct of size 168 [ 30.587474] The buggy address is located 88 bytes inside of [ 30.587474] freed 168-byte region [ffff88800c44cbc8, ffff88800c44cc70) [ 30.589116] [ 30.589369] The buggy address belongs to the physical page: [ 30.590146] page:000000001124fdab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc44c [ 30.591425] memcg:ffff88800cb2bd01 [ 30.591925] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.592684] page_type: 0xffffffff() [ 30.593213] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.594295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb2bd01 [ 30.595353] page dumped because: kasan: bad access detected [ 30.596125] [ 30.596378] Memory state around the buggy address: [ 30.597054] ffff88800c44cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.598077] ffff88800c44cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.599078] >ffff88800c44cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.600065] ^ [ 30.600677] ffff88800c44cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.601685] ffff88800c44cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.602689] ================================================================== [ 30.603842] Disabling lock debugging due to kernel taint [ 32.938719] BUG: Bad rss-counter state mm:0000000032c8bc99 type:MM_FILEPAGES val:33 [ 32.939483] BUG: Bad rss-counter state mm:0000000032c8bc99 type:MM_ANONPAGES val:22 [ 33.398406] BUG: Bad rss-counter state mm:0000000078465a7b type:MM_FILEPAGES val:33 [ 33.399621] BUG: Bad rss-counter state mm:0000000078465a7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43469' (ECDSA) to the list of known hosts. 2023/06/20 14:26:57 fuzzer started 2023/06/20 14:26:58 dialing manager at localhost:36067 2023/06/20 14:26:58 checking machine... 2023/06/20 14:26:58 checking revisions... [ 34.052422] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:26:58 testing simple program... [ 34.097512] cgroup: Unknown subsys name 'net' [ 34.134805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:57 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=000000009e5fe9c2 RCX=ffff88806cbf4e10 RDX=000000000000000d RSI=ffffffff83650bf8 RDI=00000000f56793c3 RBP=ffff88800d8029c0 RSP=ffff888015d0fa30 R8 =00000000a78b728f R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff888015d0fa98 R15=000000000000000d RIP=ffffffff822704fc 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 00007f54bf648900 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=00007f54bfc000b0 CR3=000000000f608000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffc2d8a4bb8 CR3=000000000c65e000 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=2037353a36323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000