syzkaller login: [ 39.381029] BUG: Bad rss-counter state mm:00000000c0e1eeae type:MM_FILEPAGES val:33 [ 39.382505] BUG: Bad rss-counter state mm:00000000c0e1eeae type:MM_ANONPAGES val:22 [ 39.530934] ================================================================== [ 39.532039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.533187] Read of size 8 at addr ffff88800f18bed8 by task sshd/220 [ 39.534150] [ 39.534393] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.535283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.536280] Call Trace: [ 39.536629] [ 39.536955] dump_stack_lvl+0x91/0xf0 [ 39.537457] print_report+0xcc/0x620 [ 39.537956] ? __virt_addr_valid+0x102/0x340 [ 39.538534] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.539283] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.540000] kasan_report+0xbe/0xf0 [ 39.540490] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.541128] vma_interval_tree_remove+0xc75/0xec0 [ 39.541811] vma_prepare+0xc54/0x11a0 [ 39.542455] __split_vma+0x5af/0x950 [ 39.542989] ? __pfx___split_vma+0x10/0x10 [ 39.543619] ? find_held_lock+0x2c/0x110 [ 39.544170] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.544769] ? lock_is_held_type+0x9f/0x120 [ 39.545495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.546350] ? mtree_range_walk+0x632/0x900 [ 39.547123] ? mas_walk+0x5c7/0x7c0 [ 39.547791] do_vmi_munmap+0x1f1/0x2b0 [ 39.548466] mmap_region+0x1f9/0x2660 [ 39.549119] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.549697] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.550505] ? __pfx_lock_acquire+0x10/0x10 [ 39.551159] ? __pfx_mmap_region+0x10/0x10 [ 39.551797] ? security_mmap_addr+0x7d/0xa0 [ 39.552440] ? get_unmapped_area+0x1f5/0x3f0 [ 39.553037] do_mmap+0x854/0xf00 [ 39.553521] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.554053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.554629] ksys_mmap_pgoff+0x3af/0x500 [ 39.555225] do_syscall_64+0x3f/0x90 [ 39.555703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.556351] RIP: 0033:0x7fb2e9016d82 [ 39.556866] 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 [ 39.559245] RSP: 002b:00007ffe9a628fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.560283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2e9016d82 [ 39.561151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2e8450000 [ 39.562152] RBP: 00007fb2e8450000 R08: 0000000000000009 R09: 0000000000001000 [ 39.562988] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639beca6980 [ 39.563803] R13: 00007ffe9a628ff0 R14: 00007ffe9a629020 R15: 00007ffe9a629380 [ 39.564611] [ 39.564894] [ 39.565099] Allocated by task 213: [ 39.565503] kasan_save_stack+0x22/0x50 [ 39.565981] kasan_set_track+0x25/0x30 [ 39.566449] __kasan_slab_alloc+0x59/0x70 [ 39.566942] kmem_cache_alloc+0x16b/0x370 [ 39.567437] vm_area_dup+0x20/0x160 [ 39.567866] __split_vma+0x170/0x950 [ 39.568394] split_vma+0xc6/0x110 [ 39.568876] mprotect_fixup+0x8d2/0xb30 [ 39.569350] do_mprotect_pkey+0x87e/0xd40 [ 39.569850] __x64_sys_mprotect+0x78/0xc0 [ 39.570346] do_syscall_64+0x3f/0x90 [ 39.570791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.571406] [ 39.571610] Freed by task 203: [ 39.571979] kasan_save_stack+0x22/0x50 [ 39.572454] kasan_set_track+0x25/0x30 [ 39.573023] kasan_save_free_info+0x2b/0x50 [ 39.573627] __kasan_slab_free+0x10a/0x190 [ 39.574267] kmem_cache_free+0x10d/0x4d0 [ 39.574756] rcu_core+0x8c8/0x2860 [ 39.575252] __do_softirq+0x1b7/0x7d4 [ 39.575699] [ 39.575925] Last potentially related work creation: [ 39.576539] kasan_save_stack+0x22/0x50 [ 39.577058] __kasan_record_aux_stack+0x8e/0xa0 [ 39.577631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.578274] remove_vma+0x139/0x170 [ 39.578725] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.579316] do_vmi_munmap+0x1f1/0x2b0 [ 39.579803] __vm_munmap+0x138/0x3a0 [ 39.580275] __x64_sys_munmap+0x59/0x80 [ 39.580779] do_syscall_64+0x3f/0x90 [ 39.581253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.581888] [ 39.582102] The buggy address belongs to the object at ffff88800f18be80 [ 39.582102] which belongs to the cache vm_area_struct of size 168 [ 39.583574] The buggy address is located 88 bytes inside of [ 39.583574] freed 168-byte region [ffff88800f18be80, ffff88800f18bf28) [ 39.584973] [ 39.585189] The buggy address belongs to the physical page: [ 39.585852] page:0000000093f901b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf18b [ 39.586926] memcg:ffff888017eac701 [ 39.587353] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.587994] page_type: 0xffffffff() [ 39.588444] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.589358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017eac701 [ 39.590269] page dumped because: kasan: bad access detected [ 39.590933] [ 39.591165] Memory state around the buggy address: [ 39.591756] ffff88800f18bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.592609] ffff88800f18be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.593453] >ffff88800f18be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.594297] ^ [ 39.595014] ffff88800f18bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.595877] ffff88800f18bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.596759] ================================================================== [ 39.597728] Disabling lock debugging due to kernel taint [ 41.292155] BUG: Bad rss-counter state mm:0000000010d8649c type:MM_FILEPAGES val:33 [ 41.292908] BUG: Bad rss-counter state mm:0000000010d8649c type:MM_ANONPAGES val:22 [ 41.783021] BUG: Bad rss-counter state mm:00000000204bc292 type:MM_FILEPAGES val:33 [ 41.784214] BUG: Bad rss-counter state mm:00000000204bc292 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45204' (ECDSA) to the list of known hosts. 2023/06/19 23:50:10 fuzzer started 2023/06/19 23:50:10 dialing manager at localhost:44161 2023/06/19 23:50:10 checking machine... 2023/06/19 23:50:10 checking revisions... [ 42.402058] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:50:10 testing simple program... [ 42.453507] cgroup: Unknown subsys name 'net' [ 42.489589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:00 Registers: info registers vcpu 0 RAX=0000000000c00001 RBX=000055d8d58010c0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000023 RDI=000055d8d58010c0 RBP=0000000000000017 RSP=00007ffd63846f48 R8 =000055d8d5806002 R9 =00007fac5fe45be0 R10=0000000000000100 R11=0000000000000246 R12=000055d8d57f6d00 R13=00007ffd63846f58 R14=00007fac5f86eb22 R15=00007fac5f893710 RIP=00007fac5fde64fe RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fac5f893900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd63841000 CR3=000000000dd4c000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=752f3d4854415009485441505f564e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=696d726570206c616e696d7265542023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007fbb80db9d70 CR3=000000000ee66000 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=f6c8e79cc34675bc044810e0560d6a9e XMM02=ec2efd57dc4c00df000000000011cc58 XMM03=dd74c182c8e3c979000000000011cd28 XMM04=eb1686705cbe761900000000000ae988 XMM05=19e9129bd510f2350000000000134058 XMM06=a1d2566ae1bb1d170000000000132ec0 XMM07=e042d86d42eb936e00000000001247d8 XMM08=dd74c182c8e3c979000000000011cd28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000