syzkaller login: [ 30.336982] BUG: Bad rss-counter state mm:00000000ed7764c6 type:MM_FILEPAGES val:33 [ 30.338558] BUG: Bad rss-counter state mm:00000000ed7764c6 type:MM_ANONPAGES val:22 [ 30.484475] ================================================================== [ 30.485565] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.486700] Read of size 8 at addr ffff88800f9f8ed8 by task sshd/220 [ 30.487725] [ 30.487993] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.488883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.489887] Call Trace: [ 30.490219] [ 30.490509] dump_stack_lvl+0x91/0xf0 [ 30.491013] print_report+0xcc/0x620 [ 30.491505] ? __virt_addr_valid+0x102/0x340 [ 30.492073] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.492688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.493322] kasan_report+0xbe/0xf0 [ 30.493800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494523] vma_interval_tree_remove+0xc75/0xec0 [ 30.495136] vma_prepare+0xc54/0x11a0 [ 30.495615] __split_vma+0x5af/0x950 [ 30.496100] ? __pfx___split_vma+0x10/0x10 [ 30.496643] ? find_held_lock+0x2c/0x110 [ 30.497165] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.497748] ? lock_is_held_type+0x9f/0x120 [ 30.498322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.498935] ? mtree_range_walk+0x632/0x900 [ 30.499489] ? mas_walk+0x5c7/0x7c0 [ 30.499979] do_vmi_munmap+0x1f1/0x2b0 [ 30.500479] mmap_region+0x1f9/0x2660 [ 30.500970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.501492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.502229] ? __pfx_lock_acquire+0x10/0x10 [ 30.502763] ? __pfx_mmap_region+0x10/0x10 [ 30.503302] ? security_mmap_addr+0x7d/0xa0 [ 30.503844] ? get_unmapped_area+0x1f5/0x3f0 [ 30.504405] do_mmap+0x854/0xf00 [ 30.504844] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.505348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.505908] ksys_mmap_pgoff+0x3af/0x500 [ 30.506444] do_syscall_64+0x3f/0x90 [ 30.506925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.507588] RIP: 0033:0x7fef4f130d82 [ 30.508049] 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 [ 30.510208] RSP: 002b:00007fff862169f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.511123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef4f130d82 [ 30.511979] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef4e56a000 [ 30.512842] RBP: 00007fef4e56a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.513700] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc3ec08b20 [ 30.514581] R13: 00007fff86216a10 R14: 00007fff86216a40 R15: 00007fff86216da0 [ 30.515437] [ 30.515731] [ 30.515954] Allocated by task 213: [ 30.516380] kasan_save_stack+0x22/0x50 [ 30.516893] kasan_set_track+0x25/0x30 [ 30.517397] __kasan_slab_alloc+0x59/0x70 [ 30.517928] kmem_cache_alloc+0x16b/0x370 [ 30.518461] vm_area_dup+0x20/0x160 [ 30.518919] __split_vma+0x170/0x950 [ 30.519388] split_vma+0xc6/0x110 [ 30.519830] mprotect_fixup+0x8d2/0xb30 [ 30.520342] do_mprotect_pkey+0x87e/0xd40 [ 30.520870] __x64_sys_mprotect+0x78/0xc0 [ 30.521399] do_syscall_64+0x3f/0x90 [ 30.521873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.522542] [ 30.522763] Freed by task 213: [ 30.523168] kasan_save_stack+0x22/0x50 [ 30.523681] kasan_set_track+0x25/0x30 [ 30.524182] kasan_save_free_info+0x2b/0x50 [ 30.524729] __kasan_slab_free+0x10a/0x190 [ 30.525277] kmem_cache_free+0x10d/0x4d0 [ 30.525795] rcu_core+0x8c8/0x2860 [ 30.526290] __do_softirq+0x1b7/0x7d4 [ 30.526782] [ 30.527002] Last potentially related work creation: [ 30.527586] kasan_save_stack+0x22/0x50 [ 30.528103] __kasan_record_aux_stack+0x8e/0xa0 [ 30.528731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.529384] remove_vma+0x139/0x170 [ 30.529848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.530432] do_vmi_munmap+0x1f1/0x2b0 [ 30.530929] __vm_munmap+0x138/0x3a0 [ 30.531411] __x64_sys_munmap+0x59/0x80 [ 30.531925] do_syscall_64+0x3f/0x90 [ 30.532410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.533075] [ 30.533293] The buggy address belongs to the object at ffff88800f9f8e80 [ 30.533293] which belongs to the cache vm_area_struct of size 168 [ 30.534776] The buggy address is located 88 bytes inside of [ 30.534776] freed 168-byte region [ffff88800f9f8e80, ffff88800f9f8f28) [ 30.536211] [ 30.536426] The buggy address belongs to the physical page: [ 30.537087] page:000000007309d919 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9f8 [ 30.538201] memcg:ffff888019993a01 [ 30.538632] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.539283] page_type: 0xffffffff() [ 30.539736] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.540665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019993a01 [ 30.541566] page dumped because: kasan: bad access detected [ 30.542243] [ 30.542456] Memory state around the buggy address: [ 30.543035] ffff88800f9f8d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.543898] ffff88800f9f8e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.544758] >ffff88800f9f8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.545622] ^ [ 30.546376] ffff88800f9f8f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.547240] ffff88800f9f8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.548087] ================================================================== [ 30.549020] Disabling lock debugging due to kernel taint [ 32.641924] BUG: Bad rss-counter state mm:00000000fa43be07 type:MM_FILEPAGES val:33 [ 32.642868] BUG: Bad rss-counter state mm:00000000fa43be07 type:MM_ANONPAGES val:22 [ 33.155761] BUG: Bad rss-counter state mm:00000000ecf9dd93 type:MM_FILEPAGES val:33 [ 33.157288] BUG: Bad rss-counter state mm:00000000ecf9dd93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31394' (ECDSA) to the list of known hosts. 2023/06/20 17:50:51 fuzzer started 2023/06/20 17:50:51 dialing manager at localhost:36067 2023/06/20 17:50:51 checking machine... 2023/06/20 17:50:51 checking revisions... [ 33.861218] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:50:51 testing simple program... [ 33.909163] cgroup: Unknown subsys name 'net' [ 33.946412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:51 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=ffff888008c04000 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=00007ffc9cd1d2d8 CR3=0000000019812000 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=2031353a30353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801464f6b0 RCX=0000000000000001 RDX=1ffff110028c9ee1 RSI=ffff88801464fa40 RDI=ffffffff81809a91 RBP=ffff88801464f708 RSP=ffff88801464f698 R8 =0000000000000001 R9 =ffff88801464f6f0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88801464f778 R13=0000000000000000 R14=ffff888015aeb680 R15=0000000000000000 RIP=ffffffff811303b2 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 00007fe58bb37900 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=00007fe58baf0008 CR3=000000000f242000 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