syzkaller login: [ 30.318316] BUG: Bad rss-counter state mm:00000000acec7108 type:MM_FILEPAGES val:33 [ 30.319765] BUG: Bad rss-counter state mm:00000000acec7108 type:MM_ANONPAGES val:22 [ 30.487292] ================================================================== [ 30.488194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.489119] Read of size 8 at addr ffff888017e02310 by task sshd/221 [ 30.489898] [ 30.490116] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.491071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.492043] Call Trace: [ 30.492381] [ 30.492663] dump_stack_lvl+0x91/0xf0 [ 30.493154] print_report+0xcc/0x620 [ 30.493647] ? __virt_addr_valid+0x102/0x340 [ 30.494194] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495429] kasan_report+0xbe/0xf0 [ 30.495900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496525] vma_interval_tree_remove+0xc75/0xec0 [ 30.497150] vma_prepare+0xc54/0x11a0 [ 30.497665] __split_vma+0x5af/0x950 [ 30.498154] ? __pfx___split_vma+0x10/0x10 [ 30.498705] ? find_held_lock+0x2c/0x110 [ 30.499242] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.499831] ? lock_is_held_type+0x9f/0x120 [ 30.500392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.501022] ? mtree_range_walk+0x632/0x900 [ 30.501613] ? mas_walk+0x5c7/0x7c0 [ 30.502111] do_vmi_munmap+0x1f1/0x2b0 [ 30.502624] mmap_region+0x1f9/0x2660 [ 30.503122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.503659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.504399] ? __pfx_lock_acquire+0x10/0x10 [ 30.504958] ? __pfx_mmap_region+0x10/0x10 [ 30.505518] ? security_mmap_addr+0x7d/0xa0 [ 30.506071] ? get_unmapped_area+0x1f5/0x3f0 [ 30.506640] do_mmap+0x854/0xf00 [ 30.507098] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.507612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.508195] ksys_mmap_pgoff+0x3af/0x500 [ 30.508723] do_syscall_64+0x3f/0x90 [ 30.509222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.509910] RIP: 0033:0x7fdeefadad82 [ 30.510385] 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 [ 30.512597] RSP: 002b:00007ffc53efe7f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.513544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdeefadad82 [ 30.514424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdeeef14000 [ 30.515314] RBP: 00007fdeeef14000 R08: 0000000000000009 R09: 0000000000001000 [ 30.516178] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff928cdb20 [ 30.517026] R13: 00007ffc53efe810 R14: 00007ffc53efe840 R15: 00007ffc53efeba0 [ 30.517900] [ 30.518188] [ 30.518401] Allocated by task 214: [ 30.518827] kasan_save_stack+0x22/0x50 [ 30.519327] kasan_set_track+0x25/0x30 [ 30.519817] __kasan_slab_alloc+0x59/0x70 [ 30.520334] kmem_cache_alloc+0x16b/0x370 [ 30.520848] vm_area_dup+0x20/0x160 [ 30.521304] __split_vma+0x170/0x950 [ 30.521782] split_vma+0xc6/0x110 [ 30.522219] mprotect_fixup+0x8d2/0xb30 [ 30.522723] do_mprotect_pkey+0x87e/0xd40 [ 30.523238] __x64_sys_mprotect+0x78/0xc0 [ 30.523758] do_syscall_64+0x3f/0x90 [ 30.524228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.524876] [ 30.525090] Freed by task 204: [ 30.525512] kasan_save_stack+0x22/0x50 [ 30.526014] kasan_set_track+0x25/0x30 [ 30.526508] kasan_save_free_info+0x2b/0x50 [ 30.527037] __kasan_slab_free+0x10a/0x190 [ 30.527567] kmem_cache_free+0x10d/0x4d0 [ 30.528074] rcu_core+0x8c8/0x2860 [ 30.528525] __do_softirq+0x1b7/0x7d4 [ 30.529022] [ 30.529243] Last potentially related work creation: [ 30.529864] kasan_save_stack+0x22/0x50 [ 30.530393] __kasan_record_aux_stack+0x8e/0xa0 [ 30.530984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.531657] remove_vma+0x139/0x170 [ 30.532125] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.532701] do_vmi_munmap+0x1f1/0x2b0 [ 30.533202] __vm_munmap+0x138/0x3a0 [ 30.533699] __x64_sys_munmap+0x59/0x80 [ 30.534214] do_syscall_64+0x3f/0x90 [ 30.534705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.535367] [ 30.535589] The buggy address belongs to the object at ffff888017e022b8 [ 30.535589] which belongs to the cache vm_area_struct of size 168 [ 30.537102] The buggy address is located 88 bytes inside of [ 30.537102] freed 168-byte region [ffff888017e022b8, ffff888017e02360) [ 30.538533] [ 30.538748] The buggy address belongs to the physical page: [ 30.539407] page:000000006052b3fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e02 [ 30.540497] memcg:ffff88800d89eb01 [ 30.540918] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.541569] page_type: 0xffffffff() [ 30.542026] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.542948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d89eb01 [ 30.543855] page dumped because: kasan: bad access detected [ 30.544522] [ 30.544736] Memory state around the buggy address: [ 30.545308] ffff888017e02200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.546173] ffff888017e02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.547026] >ffff888017e02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.547865] ^ [ 30.548329] ffff888017e02380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.549186] ffff888017e02400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.550041] ================================================================== [ 30.551138] Disabling lock debugging due to kernel taint [ 32.423773] BUG: Bad rss-counter state mm:000000003e4332a9 type:MM_FILEPAGES val:33 [ 32.424847] BUG: Bad rss-counter state mm:000000003e4332a9 type:MM_ANONPAGES val:22 [ 32.808845] BUG: Bad rss-counter state mm:00000000381f3566 type:MM_FILEPAGES val:33 [ 32.810038] BUG: Bad rss-counter state mm:00000000381f3566 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29556' (ECDSA) to the list of known hosts. 2023/06/21 04:56:37 fuzzer started 2023/06/21 04:56:38 dialing manager at localhost:36067 2023/06/21 04:56:38 checking machine... 2023/06/21 04:56:38 checking revisions... [ 33.412992] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:56:38 testing simple program... [ 33.450325] cgroup: Unknown subsys name 'net' [ 33.501763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:56:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=000055858d55afe0 CR3=0000000005482000 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=00007ff37d11f510000055736972e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffffea0001b78c40 RCX=0000000000000000 RDX=ffff888015b59b40 RSI=ffffffff8170bc4e RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888016427940 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800dc28740 R13=00007f0fdce90000 R14=ffff888019db4478 R15=dffffc0000000000 RIP=ffffffff814c0880 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 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=00007f0fdcd65328 CR3=000000000e77a000 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=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