syzkaller login: [ 30.358046] BUG: Bad rss-counter state mm:000000006381c780 type:MM_FILEPAGES val:33 [ 30.360030] BUG: Bad rss-counter state mm:000000006381c780 type:MM_ANONPAGES val:22 [ 30.524133] ================================================================== [ 30.525136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.526142] Read of size 8 at addr ffff88800df93a50 by task sshd/220 [ 30.527151] [ 30.527386] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.528305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.529342] Call Trace: [ 30.529680] [ 30.529987] dump_stack_lvl+0x91/0xf0 [ 30.530512] print_report+0xcc/0x620 [ 30.531053] ? __virt_addr_valid+0x102/0x340 [ 30.531641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.532306] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.532984] kasan_report+0xbe/0xf0 [ 30.533493] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.534158] vma_interval_tree_remove+0xc75/0xec0 [ 30.534797] vma_prepare+0xc54/0x11a0 [ 30.535339] __split_vma+0x5af/0x950 [ 30.535845] ? __pfx___split_vma+0x10/0x10 [ 30.536418] ? find_held_lock+0x2c/0x110 [ 30.536981] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.537587] ? lock_is_held_type+0x9f/0x120 [ 30.538164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.538813] ? mtree_range_walk+0x632/0x900 [ 30.539412] ? mas_walk+0x5c7/0x7c0 [ 30.539914] do_vmi_munmap+0x1f1/0x2b0 [ 30.540443] mmap_region+0x1f9/0x2660 [ 30.540960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.541514] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.542266] ? __pfx_lock_acquire+0x10/0x10 [ 30.542830] ? __pfx_mmap_region+0x10/0x10 [ 30.543416] ? security_mmap_addr+0x7d/0xa0 [ 30.543983] ? get_unmapped_area+0x1f5/0x3f0 [ 30.544574] do_mmap+0x854/0xf00 [ 30.545046] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.545577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.546175] ksys_mmap_pgoff+0x3af/0x500 [ 30.546718] do_syscall_64+0x3f/0x90 [ 30.547245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.547939] RIP: 0033:0x7f61e2b48d82 [ 30.548423] 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 [ 30.550672] RSP: 002b:00007ffc17b9cbc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.551647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61e2b48d82 [ 30.552551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61e1f82000 [ 30.553442] RBP: 00007f61e1f82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.554336] R10: 0000000000000812 R11: 0000000000000206 R12: 000056351adc1b20 [ 30.555262] R13: 00007ffc17b9cbe0 R14: 00007ffc17b9cc10 R15: 00007ffc17b9cf70 [ 30.556178] [ 30.556485] [ 30.556721] Allocated by task 212: [ 30.557176] kasan_save_stack+0x22/0x50 [ 30.557717] kasan_set_track+0x25/0x30 [ 30.558262] __kasan_slab_alloc+0x59/0x70 [ 30.558852] kmem_cache_alloc+0x16b/0x370 [ 30.559428] vm_area_dup+0x20/0x160 [ 30.559931] __split_vma+0x170/0x950 [ 30.560450] split_vma+0xc6/0x110 [ 30.560930] mprotect_fixup+0x8d2/0xb30 [ 30.561485] do_mprotect_pkey+0x87e/0xd40 [ 30.562060] __x64_sys_mprotect+0x78/0xc0 [ 30.562637] do_syscall_64+0x3f/0x90 [ 30.563188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.563896] [ 30.564133] Freed by task 212: [ 30.564563] kasan_save_stack+0x22/0x50 [ 30.565119] kasan_set_track+0x25/0x30 [ 30.565663] kasan_save_free_info+0x2b/0x50 [ 30.566252] __kasan_slab_free+0x10a/0x190 [ 30.566849] kmem_cache_free+0x10d/0x4d0 [ 30.567480] rcu_core+0x8c8/0x2860 [ 30.567970] __do_softirq+0x1b7/0x7d4 [ 30.568495] [ 30.568731] Last potentially related work creation: [ 30.569379] kasan_save_stack+0x22/0x50 [ 30.569937] __kasan_record_aux_stack+0x8e/0xa0 [ 30.570575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.571321] remove_vma+0x139/0x170 [ 30.571819] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.572445] do_vmi_munmap+0x1f1/0x2b0 [ 30.572987] __vm_munmap+0x138/0x3a0 [ 30.573501] __x64_sys_munmap+0x59/0x80 [ 30.574052] do_syscall_64+0x3f/0x90 [ 30.574570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.575294] [ 30.575532] The buggy address belongs to the object at ffff88800df939f8 [ 30.575532] which belongs to the cache vm_area_struct of size 168 [ 30.577166] The buggy address is located 88 bytes inside of [ 30.577166] freed 168-byte region [ffff88800df939f8, ffff88800df93aa0) [ 30.578722] [ 30.578977] The buggy address belongs to the physical page: [ 30.579710] page:000000007bd2d7ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf93 [ 30.580913] memcg:ffff88800dcba101 [ 30.581384] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.582158] page_type: 0xffffffff() [ 30.582654] raw: 0100000000000200 ffff88800879fc80 ffffea0000382240 dead000000000003 [ 30.583684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcba101 [ 30.584692] page dumped because: kasan: bad access detected [ 30.585430] [ 30.585669] Memory state around the buggy address: [ 30.586313] ffff88800df93900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.587270] ffff88800df93980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.588222] >ffff88800df93a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.589165] ^ [ 30.589940] ffff88800df93a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.590888] ffff88800df93b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.591841] ================================================================== [ 30.593029] Disabling lock debugging due to kernel taint [ 33.361007] BUG: Bad rss-counter state mm:00000000e8e13ebb type:MM_FILEPAGES val:33 [ 33.362255] BUG: Bad rss-counter state mm:00000000e8e13ebb type:MM_ANONPAGES val:22 [ 33.904332] BUG: Bad rss-counter state mm:00000000bfcf2f81 type:MM_FILEPAGES val:33 [ 33.905534] BUG: Bad rss-counter state mm:00000000bfcf2f81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44696' (ECDSA) to the list of known hosts. 2023/06/20 05:54:00 fuzzer started 2023/06/20 05:54:00 dialing manager at localhost:44161 2023/06/20 05:54:00 checking machine... 2023/06/20 05:54:00 checking revisions... [ 34.549043] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:54:00 testing simple program... [ 34.592740] cgroup: Unknown subsys name 'net' [ 34.634223] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888016e81b40 RSI=ffffffff8171b237 RDI=0000000000000007 RBP=ffff88800fa98000 RSP=ffff888016927e68 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=0000000000000000 R13=00007f9882155968 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81534325 RFL=00000093 [--S-A-C] 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 00007f98815b3900 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=00007f9882155968 CR3=000000001ca66000 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=0000000000000001 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=00007fea3265e120 CR3=000000000e89e000 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=2039353a33353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000